Goldstone Radar Observations Planning: (456537) 2007 BG, 1999 RM45, 2015 BY310, 2021 CF6, 2021 DE, and 2021 DW1
1999 RM45 1999 RM45 was discovered on September 14, 1999 at the Lincoln Laboratory ETS (LINEAR) in New Mexico. Spitzer "ExploreNEOs" observations from 2009 suggest that the object is 0.315 km +0.126 -0.064 km in diameter, corresponding to an optical albedo of ~0.24. In Feb. 2021, Pravec et al. reported that 1999 RM45 is a binary system with a primary rotation period of 3.07 h and a secondary orbital period of 16.445 h. The lightcurve amplitude of only 0.07 mag for the primary indicates a shape with a low elongation and the depth of the dip during eclipses and occultations suggests a diameter ratio Dsecondary/Dprimary of about 0.45. Due to the estimated diameters and rotation period, we are expecting a bandwidth of about 10 Hz for the primary and about 1 Hz for the secondary. 1999 RM45 will approach within 0.020 au, or ~7.8 lunar distances, on March 2, 2021 when it will be an excellent target for high-resolution radar imaging. Goldstone observations are scheduled on six tracks from Feb. 27 - Mar. 7. Radar observations are also scheduled on March 1 and 2 at Canberra using DSS-36 and DSS-34 to transmit 7190 MHz and the ATCA to receive. 1999 RM45 will also be an excellent optical target in late February when it becomes brighter than 14th magnitude. However, it will be relatively close to the nearly full Moon, so this may impact the optical obeservations. 1999 RM45 has been classified as a "Potentially Hazardous Asteroid" (PHA) by the IAU's Minor Planet Center. 2007 BG (456537) 2007 BG was discovered on January 18, 2007 by the Siding Spring Survey in Australia. This object makes a relatively close approach within 0.035 au (13.6 lunar distances) on February 26, 2021, when it will be a weak radar target at Goldstone. The NEOWISE team (Nugent et al., AJ 2015) reported a diameter of ~310 m and a moderately bright optical albedo of ~0.24. The albedo excludes dark taxonomic classes and its size makes it unlikely that the rotation period is more rapid than 2 hours. 2007 BG's orbit has a moderate eccentricity (e = 0.33) and inclination (i = 12.7 deg) and 2021 is the closest approach until an encounter within 0.072 au in 2051. 2007 BG becomes a daytime object in early February, so it is unlikely that lightcurves will be available before the radar observations. 2015 BY310 (535844) 2015 BY310 was discovered on January 18, 2015 by Pan-STARRS 1 at Haleakala. Its absolute magnitude of 21.7 suggests a size within a factor of two of ~140 m. Pravec et al. (2019) reported a very rapid rotation period of only 5.56 minutes, which is exceptionally fast for an object of this size, and a 0.7 mag lightcurve amplitude, which implies an elongated shape. Perna et al. (2018) reported an Sr spectral class. This asteroid will be barely detectable at Goldstone if the rapid period is correct, which would produce an echo with a bandwidth of ~150 Hz (!). The tracks overlap time scheduled for 1999 RM45 and Apophis, so the observing time will still be used even if 2015 BY310 is too weak to detect. We did not know about the extremely rapid rotation period when time for this object was requested years ago. 2015 BY310 will make a number of close approaches over the next ten years (see the animation below): 2021 Mar 10 0.036 au 2023 Mar 7 0.027 au 2025 Mar 5 0.025 au 2027 Mar 4 0.024 au 2029 Mar 2 0.025 au 2031 Mar 2 0.053 au A similar pattern of of close approaches will start in the late 2100s. Due to the repeated close approaches and opportunities for obtaining precise range measurements, 2015 BY310 will be an excellent target for a Yarkovsky effect detection. 2015 BY310 has been classified as a "Potentially Hazardous Asteroid" (PHA) by the IAU's Minor Planet Center. 2021 CF6 Radar observations on March 9 suggest a diameter of about 60 meters and a rotation period of roughly 0.1 hour (~6 minutes). 2021 DE 2021 DW1
Orbital and Physical Characteristics Name 2007 BG 1999 RM45 2015 BY310 Asteroid number 456537 None 535844 Discoverer Siding Spring Survey LINEAR Pan-STARRS 1 Discovery date 2007 Jan 18 1999 Sep 14 2015 Jan 18 orbit type Aten Apollo Apollo Close approach distance 0.057 au 0.020 au 0.036 au Close approach date 2021 Feb 26 2021 Mar 02 2021 Mar 10 semimajor axis 0.787 au 1.681 au 1.584 au eccentricity 0.33 0.64 0.40 inclination 12.7 deg 10.89 deg 4.86 deg Orbital period 0.70 years 2.18 years 1.99 years perihelion distance 0.526 au 0.598 au 0.951 au aphelion distance 1.047 au 2.762 au 2.218 au MOID 0.052 au 0.0027 au 0.0233 au absolute magnitude (H) 19.5 19.4 21.7 diameter 0.308+/-0.108 km (NEOWISE) 0.315,+0.126/-0.064 km (SPITZER) unknown optical albedo 0.242+/-0.186 (NEOWISE) 0.238,+0.142,-0.121 (SPITZER) unknown rotation period unknown 3.0697 h, 16.445 h BINARY 0.09267 h (Pravec et al, 2019) lightcurve amplitude unknown 0.07 mag 0.7 mag (Pravec et al., 2019) pole direction unknown unknown unknown spectral class unknown unknown Sr (Perna et al., 2018) PHA? No Yes Yes
Name 2021 CF6 2021 DE 2021 DW1 Asteroid number None None None Discoverer Mt. Lemmon Survey Pan-STARRS 2 Pan-STARRS 1 Discovery date 2021 Feb 9 2021 Feb 16 2021 Feb 16 orbit type Apollo Apollo Apollo Close approach distance 0.011 au (4.2 LD) 0.011 au (4.2 LD) 0.0038 au (1.5 LD) Close approach date 2021 Mar 10 2021 Feb 27 2021 Mar 4 semimajor axis 2.076 au 1.387 au 1.317 au eccentricity 0.527 0.759 0.246 inclination 6.9 deg 4.8 deg 7.1 deg Orbital period 2.99 y 1.63 y 1.51 y perihelion distance 0.982 au 0.334 au 0.993 au aphelion distance 3.170 au 1.850 au 1.641 au MOID 0.0079 au 0.0023 au 0.0035 absolute magnitude (H) 23.8 24.3 25.2 diameter ~60 m radar ~50 m ~30 m optical albedo unknown unknown unknown rotation period ~0.1 h radar unknown 25 seconds (Kwiatkowski) lightcurve amplitude unknown unknown 0.2 mag (Kwiatkowski) pole direction unknown unknown unknown spectral class unknown unknown unknown PHA? No No No NHATS Last update: 2021 April 30
Delay-Doppler radar images of 1999 RM45 obtained on March 2. Resolution is 18.75 m x 1 Hz. In each panel, range increases down and Doppler frequency increases to the right, so the illumination comes from the top and rotation is counterclockwise. In the collage, time increases from the top left panel to the top right panel, etc., so the last frame in the sequence is at the lower right. Each image is an integration spanning eight runs. The sequence of images spans about 153 minutes.
Orbital motion of 2015 BY310 shown in a heliocentric reference frame with actual positions of the inner solar system planets. The orbit of 2015 BY310 has relatively lage eccentricity.
Orbital motion of 2015 BY310 shown in the frame centered on the Sun and rotating with the Earth. The asteroid makes a series of close approaches 2020-2030, after which it moves away from Earth until late 2100s when the petal-like patern repeats.
1999 RM45 https://minorplanetcenter.net//iau/mpec/J99/J99S08.html 2007 BG https://minorplanetcenter.net//mpec/K07/K07B18.html 2015 BY310 https://www.minorplanetcenter.net/mpec/K15/K15BA6.html 2021 CF6 https://www.minorplanetcenter.net/mpec/K21/K21CN8.html 2021 DE https://www.minorplanetcenter.net/mpec/K21/K21D23.html 2021 DW1 https://www.minorplanetcenter.net/mpec/K21/K21D73.html
Goldstone SNRs 1999 RM45: D = 0.31 km, P = 2.0 h, OC albedo = 0.1 DOY start date window RA, dec dist runs SNR/day SNR/run 56 2021 Feb 25 02:59-10:47 141, -7 0.067 229 16 1 57 2021 Feb 26 02:40-10:30 138, -7 0.056 273 32 2 58 2021 Feb 27 02:16-10:07 133, -6 0.046 336 74 5 Scheduled 0620-0750 59 2021 Feb 28 01:40-09:34 125, -5 0.036 430 190 11 Scheduled 0540-0745 60 2021 Mar 1 00:43-08:41 113, -3 0.027 571 580 27 Scheduled 0610-0840 60-61 2021 Mar 1- 2 23:11-07:17 91, +1 0.021 750 1600 64 Scheduled 0530-0715 61-62 2021 Mar 2- 3 21:00-05:27 62, +6 0.020 837 2100 81 62-63 2021 Mar 3- 4 18:54-03:50 35, +9 0.024 730 1100 44 63-64 2021 Mar 4- 5 17:31-02:47 18, +10 0.031 569 370 17 64-65 2021 Mar 5- 6 16:41-02:07 8, +10 0.040 445 130 7 Scheduled 2040-0205 65-66 2021 Mar 6- 7 16:09-01:39 1, +10 0.051 358 55 3 Scheduled 0005-0140 66-67 2021 Mar 7- 8 15:48-01:20 357, +10 0.062 297 26 2 67-68 2021 Mar 8- 9 15:32-01:04 354, +10 0.073 253 13 1 Pravec et al. report a rotation period of 3.07 h for the 1999 RM45 primary, so all else being equal, the SNRs will be about 1.2x stronger than shown above. 2007 BG: D = 0.31 km, P = 2.0 h, OC albedo = 0.1 w DOY start date window RA, dec dist runs SNR/day SNR/run 8 58-59 2021 Feb 27-28 22:25-00:41 33, -33 0.058 71 15 2 8 59-60 2021 Feb 28-01 21:13-01:21 30, -28 0.060 127 20 2 Scheduled 9 60-61 2021 Mar 01-02 20:24-01:41 28, -23 0.061 157 21 2 9 61-62 2021 Mar 02-03 19:46-01:53 26, -19 0.063 175 21 2 9 62-63 2021 Mar 03-04 19:14-02:00 23, -15 0.066 186 19 2 9 63-64 2021 Mar 04-05 18:47-02:04 22, -11 0.069 192 17 1 NOTE: 2007 BG is too far south for Goldstone to observe before February 27. 2015 BY310: D = 0.14 km, P = 0.093 h, OC albedo = 0.1 DOY start date window RA, dec dist runs SNR/day SNR/run 62-63 2021 Mar 3- 4 23:05-07:34 95, -1 0.045 363 6 0 63-64 2021 Mar 4- 5 23:02-07:06 93, -5 0.042 366 7 0 64-65 2021 Mar 5- 6 23:00-06:35 90, -9 0.040 364 8 0 Scheduled 2040-0920 65-66 2021 Mar 6- 7 23:00-05:59 86, -13 0.039 355 8 0 Scheduled 0005-0855 66-67 2021 Mar 7- 8 23:02-05:18 82, -18 0.038 338 9 1 Scheduled 0315-0715 67-68 2021 Mar 8- 9 23:07-04:30 78, -23 0.037 310 9 1 Scheduled 0130-0955 68-69 2021 Mar 9-10 23:19-03:31 73, -28 0.036 269 8 1 Scheduled 2320-0820 69-70 2021 Mar 10-11 23:48-02:12 68, -32 0.036 213 6 0 2021 CF6 2021 CF6: D = 0.06 km, P = 0.5 h, OC albedo = 0.1 start date window RA, dec dist runs SNR/day SNR/run 2021 Mar 4- 5 21:33-05:49 71, -3 0.028 500 22 1 2021 Mar 5- 6 21:10-05:32 67, -2 0.024 593 42 2 2021 Mar 6- 7 20:39-05:09 61, 0 0.020 721 87 4 2021 Mar 7- 8 19:55-04:36 52, +3 0.016 898 200 7 2021 Mar 8- 9 18:52-03:46 39, +7 0.013 1128 450 14 2021 Mar 9-10 17:23-02:33 20, +12 0.011 1354 820 24* Overlaps BY310 & Apophis. Use BY310 time 2021 Mar 10-11 15:35-01:02 356, +16 0.011 1428 900 26 2021 Mar 11 13:55-23:38 334, +17 0.012 1291 560 17* Overlaps 2004 FX31. Stronger target than FX31. 2021 Mar 12 12:43-22:35 318, +17 0.015 1075 260 8 2021 Mar 13 11:56-21:50 308, +16 0.019 882 110 4 2021 Mar 14 11:24-21:19 301, +15 0.023 733 55 2 2021 Mar 15 11:02-20:55 296, +14 0.027 621 28 1 2021 DE 2021 DE: D = 0.05 km, P = 0.5 h, OC albedo = 0.1 start date window RA, dec dist runs SNR/day SNR/run 2021 Feb 26 02:59-12:18 154, +10 0.027 642 23 1 2021 Feb 27 01:40-10:33 132, +13 0.015 1168 235 7 2021 Feb 27-28 22:20-06:20 77, +11 0.011 1624 918 24 Overlaps 1999 RM45 on Feb. 28. 2021 Feb 28- 1 19:10-03:28 32, +3 0.018 883 109 4 Overlaps 2007 BG (entire track) 2021 Mar 1- 2 18:05-02:24 17, -1 0.031 497 13 1 2021 DW1 2021 DW1: D = 0.03 km, P = 0.5 h, OC albedo = 0.1 start date window RA, dec dist runs SNR/day SNR/run 2021 Feb 26 01:07-07:22 103, -19 0.019 580 29 1 2021 Feb 27 00:59-07:32 104, -17 0.016 719 60 2 2021 Feb 28 00:51-07:48 105, -14 0.013 931 140 5 * Attempted during the RM45 track. 2021 Mar 1 00:41-08:13 108, -10 0.011 1287 400 12 2021 Mar 2 00:30-08:57 113, -3 0.008 1962 1500 38 2021 Mar 3 00:18-10:30 122, +12 0.005 3435 8300 150 2021 Mar 4 00:24-15:08 150, +44 0.004 6093 33000 460 2021 Mar 5 03:13-19:38 224, +57 0.005 5130 10000 160 2021 Mar 6 06:35-20:18 252, +48 0.008 3097 1900 37 2021 Mar 7 07:41-20:27 260, +43 0.011 2155 530 13 2021 Mar 8 08:09-20:29 265, +39 0.013 1640 200 5 2021 Mar 9 08:24-20:28 267, +37 0.016 1320 88 3 2021 Mar 10 08:33-20:26 269, +35 0.019 1104 45 1 Update on 2021 March 4: Tomasz Kwiatkowski reports a very fast rotation period of only 25 seconds, so all else being equal, the SNRs should be only about 12% of the values above. This explains why we did not detect an echo from 2021 DW1 on February 28.
Track Assignments
DOY BOA BOT EOT EOA 58 0450 0620 0750 0820 GSSR AST 1999 RM45 Overlaps Apophis entirely 59 0410 0540 0745 0815 GSSR AST 1999 RM45 Overlaps Apophis entirely 59 2055 2225 2355 0025 GSSR AST 2007 BG 60 0440 0610 0840 0910 GSSR AST 1999 RM45 Overlaps Apophis entirely 60 1100 1540 CSSR AST 1999 RM45 DSS-36/ATCA (S. Horiuchi et al., Australia) 61 0400 0530 0715 0745 GSSR AST 1999 RM45 Overlaps Apophis entirely 61 1035 1550 CSSR AST 1999 RM45 DSS-34/ATCA (S. Horiuchi et al., Australia) 64-65 1910 2040 0920 0950 GSSR AST 1999 RM45, 2015 BY310, and Apophis 66 0005 0855 0925 GSSR AST 2015 BY310 and APOPHIS. Overlaps 1999 RM45. 67 0145 0315 0715 0745 GSSR AST 2015 BY310 and APOPHIS 68 0000 0130 0955 1025 GSSR AST 2015 BY310 and APOPHIS 68-69 2150 2320 0820 0850 GSSR AST 2015 BY310 and APOPHIS 2:25 at the start when BY310 does not overlap Goldstone tracks: UT UT PST Duration Round-trip DOY Date TX Window TX Window hh:mm time (sec) SNR/run 58 Feb 27 1999 RM45 0620-0750 2220-2350 Feb 26 1:30 46 5 Start during precal 59 Feb 28 1999 RM45 0540-0745 2140-2345 Feb 27 2:05 36 11 Start during precal; Also 2021 DW1 and DE 59 Feb 28 2007 BG 2225-2355 1425-1555 Feb 28 1:30 59 1 Also 2021 DE 60 Mar 1 1999 RM45 0610-0840 2210-0040 Feb 28- 1 2:30 27 27 Start during precal 60 Mar 1 1999 RM45 1100-1540 0300-0740 Mar 1 4:40 DSS-36/ATCA (S. Horiuchi et al.) 61 Mar 2 1999 RM45 0530-0715 2130-2315 Mar 1 1:45 21 64 Start during precal 61 Mar 2 1999 RM45 1035-1550 0235-0750 Mar 2 5:15 DSS-34/ATCA (S. Horiuchi et al.) 64-65 Mar 5- 6 1999 RM45 2040-0205 1240-1805 Mar 5 6:05 40 7 Start during precal 64-65 Mar 5- 6 2015 BY310 2300-0635 1500-2235 Mar 5 7:35 41 <1 Overlaps Apophis. Also 2021 DW1. 66 Mar 7 1999 RM45 0005-0140 1605-1740 Mar 6 1:35 51 3 Start during precal 66 Mar 7 2015 BY310 0005-0600 1605-2200 Mar 6 5:55 39 <1 Overlaps Apophis 67 Mar 8 2015 BY310 0315-0515 1915-2115 Mar 7 2:00 38 <1 Overlaps Apophis and 2021 CF6 68 Mar 9 2015 BY310 0130-0430 1730-2030 Mar 8 3:00 37 <1 Overlaps Apophis and 2021 CF6 68-69 Mar 9-10 2015 BY310 2320-0330 1520-1930 Mar 9 4:10 36 <1 Overlaps 2021 CF6 at the start and Apophis later. 70 Mar 11 2004 FX31 1215-1415 0415-0615 Mar 11 2:00 93 2 Overlaps 2021 CF6 20 minutes at the end.
Uncertainties
1999 RM45 JPL/Horizons solution 51, # obs: 242 (1999-2021) 2021 Feb 24 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_X_3sig RT_delay_3sig 2021-Feb-25 00:00 *m 142.31928 -7.23605 0.07035061496422 0.604 1.04 0.000977 2021-Feb-26 00:00 *m 139.17340 -6.86713 0.05925800311135 0.802 1.00 0.000982 2021-Feb-27 00:00 * 134.62938 -6.28230 0.04844687162499 1.184 1.44 0.000982 * 2021-Feb-28 00:00 * 127.59953 -5.28393 0.03812828748010 2.000 4.01 0.000964 * 2021-Mar-01 00:00 * 115.79962 -3.41646 0.02880702069494 3.865 12.71 0.000895 * 2021-Mar-02 00:00 * 94.94210 0.21218 0.02177662509415 7.740 37.15 0.000673 * 2021-Mar-03 00:00 * 63.40666 5.48551 0.01965565206284 11.063 60.88 0.000204 2021-Mar-04 00:00 * 34.41919 8.88778 0.02379500472060 8.829 40.62 0.000383 2021-Mar-05 00:00 * 16.81059 9.89152 0.03184863197247 5.747 20.10 0.000655 2021-Mar-06 00:00 * 6.79995 10.04922 0.04161609836726 3.901 10.84 0.000795 * 2021-Mar-07 00:00 * 0.69316 9.98816 0.05216030362208 2.857 6.78 0.000876 * 2021-Mar-08 00:00 * 356.66425 9.87618 0.06311259382030 2.228 4.81 0.000930 2021-Mar-09 00:00 * 353.83402 9.75748 0.07431403287422 1.822 3.78 0.000970 2021-Mar-10 00:00 * 351.74842 9.64324 0.08568970363966 1.543 3.21 0.001004 - - - - - - - - - - JPL/Horizons solution 41, # obs: 121 (1999-2021) Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_X_3sig RT_delay_3sig 2021-Feb-25 00:00 *m 142.31930 -7.23618 0.07035045821079 1.901 2.89 0.001189 2021-Feb-26 00:00 *m 139.17340 -6.86728 0.05925784158520 2.244 3.43 0.001206 2021-Feb-27 00:00 * 134.62937 -6.28249 0.04844670529890 2.758 4.37 0.001221 2021-Feb-28 00:00 * 127.59948 -5.28417 0.03812811747811 3.654 6.75 0.001224 2021-Mar-01 00:00 * 115.79948 -3.41676 0.02880685272949 5.571 15.20 0.001180 2021-Mar-02 00:00 * 94.94176 0.21181 0.02177648168577 9.838 42.44 0.000985 2021-Mar-03 00:00 * 63.40610 5.48512 0.01965558441460 14.138 73.54 0.000536 2021-Mar-04 00:00 * 34.41871 8.88743 0.02379502768876 11.987 52.67 0.000493 2021-Mar-05 00:00 * 16.81027 9.89124 0.03184871082481 8.306 27.74 0.000752 2021-Mar-06 00:00 * 6.79973 10.04900 0.04161620820534 5.922 15.71 0.000917 2021-Mar-07 00:00 * 0.69300 9.98798 0.05216043268959 4.491 10.14 0.001020 2021-Mar-08 00:00 * 356.66412 9.87603 0.06311273645027 3.585 7.32 0.001092 2021-Mar-09 00:00 * 353.83392 9.75735 0.07431418610129 2.975 5.78 0.001147 2021-Mar-10 00:00 * 351.74834 9.64312 0.08568986579840 2.540 4.87 0.001193 2007 BG JPL/Horizons solution 54, # obs: 155 (2007-2021) 2021 Feb 23 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_X_3sig RT_delay_3sig 2021-Feb-20 00:00 *m 76.95757 -63.63865 0.06678507503970 0.828 1.79 0.000480 2021-Feb-21 00:00 *m 69.05426 -61.39586 0.06416360248473 0.932 1.88 0.000475 2021-Feb-22 00:00 *m 61.79466 -58.53871 0.06190942277895 1.053 2.07 0.000466 2021-Feb-23 00:00 *m 55.29242 -55.10742 0.06006837155993 1.188 2.36 0.000453 2021-Feb-24 00:00 *m 49.56437 -51.17348 0.05868428683409 1.333 2.74 0.000436 2021-Feb-25 00:00 *m 44.56430 -46.83390 0.05779546377214 1.478 3.17 0.000415 2021-Feb-26 00:00 *m 40.21476 -42.20462 0.05743089149207 1.615 3.59 0.000391 2021-Feb-27 00:00 * 36.42914 -37.41197 0.05760704492710 1.734 3.97 0.000363 2021-Feb-28 00:00 * 33.12409 -32.58222 0.05832604534359 1.828 4.26 0.000333 2021-Mar-01 00:00 * 30.22516 -27.83073 0.05957570594158 1.893 4.43 0.000304 2021-Mar-02 00:00 * 27.66847 -23.25322 0.06133143659786 1.927 4.49 0.000277 2021-Mar-03 00:00 * 25.40040 -18.92078 0.06355945675425 1.933 4.46 0.000255 2021-Mar-04 00:00 * 23.37642 -14.87917 0.06622050539600 1.915 4.34 0.000238 2021-Mar-05 00:00 * 21.55974 -11.15155 0.06927330587204 1.879 4.18 0.000230 2015 BY310 JPL/Horizons solution 57, # obs: 217 (2015-2021) Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_X_3sig RT_delay_3sig 2021-Mar-01 00:00 * 102.66299 8.08020 0.05351739091901 0.701 0.72 0.000309 2021-Mar-02 00:00 * 100.61707 5.47431 0.05051329283580 0.747 0.77 0.000311 2021-Mar-03 00:00 * 98.36223 2.54397 0.04769288698241 0.805 0.86 0.000312 2021-Mar-04 00:00 * 95.86598 -0.74131 0.04508844490467 0.878 1.01 0.000312 2021-Mar-05 00:00 * 93.09127 -4.40338 0.04273766614229 0.970 1.22 0.000309 2021-Mar-06 00:00 * 89.99665 -8.44746 0.04068313207079 1.082 1.51 0.000304 2021-Mar-07 00:00 * 86.53706 -12.85177 0.03897069193579 1.214 1.87 0.000295 2021-Mar-08 00:00 * 82.66592 -17.55678 0.03764641406654 1.359 2.28 0.000283 2021-Mar-09 00:00 * 78.33907 -22.45776 0.03675203933376 1.507 2.71 0.000267 2021-Mar-10 00:00 * 73.52134 -27.40576 0.03631950346221 1.643 3.09 0.000249 2021-Mar-11 00:00 * 68.19622 -32.22098 0.03636584684941 1.753 3.38 0.000228 2021-Mar-12 00:00 *m 62.37798 -36.71760 0.03689018760192 1.826 3.55 0.000207 2021-Mar-13 00:00 *m 56.12374 -40.73342 0.03787391863929 1.857 3.58 0.000187 2021-Mar-14 00:00 *m 49.54046 -44.15454 0.03928403843010 1.849 3.49 0.000171 2021-Mar-15 00:00 *m 42.78121 -46.92768 0.04107833538560 1.808 3.31 0.000159 2021-Mar-16 00:00 *m 36.02765 -49.05830 0.04321075656849 1.744 3.08 0.000153 2021-Mar-17 00:00 *m 29.46242 -50.59809 0.04563573301536 1.665 2.82 0.000151 2021-Mar-18 00:00 *m 23.24111 -51.62720 0.04831099079839 1.578 2.56 0.000154 2021-Mar-19 00:00 *m 17.47388 -52.23696 0.05119896565619 1.489 2.31 0.000160 2021-Mar-20 00:00 *m 12.22077 -52.51663 0.05426720258052 1.401 2.08 0.000167 2021 CF6 JPL/Horizons solution 18, # obs: 107 (25 days) 2021 Mar 9 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_S_3sig DOP_X_3sig RT_delay_3sig 2021-Mar-01 00:00 * 79.98715 -5.61601 0.04669652229207 0.806 346.00 1257.50 0.126512 2021-Mar-02 00:00 * 78.53938 -5.19129 0.04208400408615 0.823 344.57 1252.33 0.113975 2021-Mar-03 00:00 * 76.74252 -4.65670 0.03749554165307 0.824 342.20 1243.71 0.101505 2021-Mar-04 00:00 * 74.45216 -3.96617 0.03294735205060 0.811 338.34 1229.67 0.089146 2021-Mar-05 00:00 * 71.43864 -3.04582 0.02846519895956 0.808 332.00 1206.65 0.076969 2021-Mar-06 00:00 * 67.31881 -1.77241 0.02409272114168 0.927 321.32 1167.81 0.065093 2021-Mar-07 00:00 * 61.42242 0.06545 0.01990941871782 1.498 302.40 1099.06 0.053737 2021-Mar-08 00:00 * 52.54247 2.82077 0.01607123150529 3.096 266.83 969.78 0.043335 2021-Mar-09 00:00 * 38.63366 6.94137 0.01289792434799 6.570 197.29 717.06 0.034770 2021-Mar-10 00:00 * 17.55667 12.21727 0.01098894933044 11.877 72.56 263.71 0.029695 * 2021-Mar-11 00:00 * 351.75905 16.27284 0.01102669058806 14.812 86.46 314.22 0.029951 2021-Mar-12 00:00 *m 329.64092 17.23778 0.01299529395614 13.121 206.21 749.45 0.035434 2021-Mar-13 00:00 *m 314.79053 16.52527 0.01620447186651 10.634 272.03 988.70 0.044245 Pointing and Doppler uncertainties are good. JPL/Horizons solution 12, # obs: 62 (17 days) OCC = 8 2021 Feb 26 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_S_3sig DOP_X_3sig RT_delay_3sig 2021-Mar-01 00:00 * 79.98714 -5.61591 0.04668828861383 4.125 799.91 2907.24 0.305087 2021-Mar-02 00:00 * 78.53934 -5.19117 0.04207647585277 6.478 797.01 2896.68 0.276129 2021-Mar-03 00:00 * 76.74242 -4.65654 0.03748871633792 10.141 792.15 2879.02 0.247318 2021-Mar-04 00:00 * 74.45199 -3.96597 0.03294122560856 15.896 784.30 2850.49 0.218744 2021-Mar-05 00:00 * 71.43834 -3.04555 0.02845976525490 25.177 771.66 2804.55 0.190548 2021-Mar-06 00:00 * 67.31828 -1.77202 0.02408797124182 40.737 750.94 2729.25 0.162962 2021-Mar-07 00:00 * 61.42148 0.06603 0.01990534031897 68.037 715.78 2601.47 0.136381 2021-Mar-08 00:00 * 52.54077 2.82166 0.01606780953050 117.575 653.40 2374.77 0.111529 2021-Mar-09 00:00 * 38.63056 6.94272 0.01289514379975 203.624 539.03 1959.07 0.089802 2021-Mar-10 00:00 * 17.55161 12.21892 0.01098678079289 311.116 338.20 1229.17 0.074069 * 2021-Mar-11 00:00 * 351.75313 16.27400 0.01102497499223 342.199 170.18 618.49 0.069241 2021-Mar-12 00:00 *m 329.63604 17.23824 0.01299366699148 273.533 394.99 1435.57 0.077696 2021-Mar-13 00:00 *m 314.78701 16.52540 0.01620258868440 196.187 579.33 2105.53 0.095607 JPL/Horizons solution 8, # obs: 47 (13 days), OCC = 8 2021 Feb 22 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_S_3sig DOP_X_3sig RT_delay_3sig 2021-Mar-01 00:00 * 79.98704 -5.61592 0.04670424546464 16.661 1144.92 4161.15 0.462877 2021-Mar-02 00:00 * 78.53922 -5.19117 0.04209085027324 24.787 1141.75 4149.64 0.421504 2021-Mar-03 00:00 * 76.74229 -4.65655 0.03750151754055 36.947 1136.37 4130.09 0.380312 2021-Mar-04 00:00 * 74.45184 -3.96597 0.03295246858388 55.610 1127.78 4098.86 0.339407 2021-Mar-05 00:00 * 71.43815 -3.04554 0.02846947431830 85.259 1114.44 4050.39 0.298941 2021-Mar-06 00:00 * 67.31806 -1.77201 0.02409618663981 134.420 1094.02 3976.15 0.259131 2021-Mar-07 00:00 * 61.42120 0.06605 0.01991213138891 219.869 1063.16 3864.02 0.220292 2021-Mar-08 00:00 * 52.54040 2.82169 0.01607330243508 373.453 1018.26 3700.83 0.182845 2021-Mar-09 00:00 * 38.63010 6.94276 0.01289957953436 637.084 955.31 3472.03 0.147411 2021-Mar-10 00:00 * 17.55114 12.21891 0.01099060796969 959.441 823.18 2991.82 0.116172 2021-Mar-11 00:00 * 351.75289 16.27391 0.01102886039209 1039.083 476.26 1730.96 0.097835 2021-Mar-12 00:00 *m 329.63612 17.23814 0.01299825226702 815.794 440.23 1599.98 0.101616 2021-Mar-13 00:00 *m 314.78728 16.52534 0.01620828402863 572.931 733.60 2666.22 0.122577 2021 DE JPL/Horizons solution 9, # obs: 63 (11 days) 2021 Feb 28 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_S_3sig DOP_X_3sig RT_delay_3sig 2021-Feb-25 00:00 *m 163.74472 8.43849 0.04618025132511 0.710 2376.14 8635.98 0.271332 2021-Feb-26 00:00 *m 157.42083 9.57229 0.03171943320145 0.969 2295.08 8341.37 0.186278 2021-Feb-27 00:00 * 141.09003 11.91330 0.01828452463959 1.955 1969.26 7157.19 0.107294 2021-Feb-28 00:00 * 84.37092 12.20500 0.01075803853806 6.122 68.73 249.79 0.063249 2021-Mar-01 00:00 * 31.20838 2.36654 0.01870208219069 3.222 1995.02 7250.82 0.110150 * 2021-Mar-02 00:00 * 16.03634 -1.30238 0.03219764870722 2.128 2298.39 8353.38 0.189520 2021-Mar-03 00:00 * 9.99715 -2.74960 0.04666781558054 1.912 2375.75 8634.54 0.274597 2021-Mar-04 00:00 * 6.81573 -3.49819 0.06144854876707 1.815 2408.68 8754.24 0.361497 2021-Mar-05 00:00 * 4.85491 -3.95222 0.07638466272144 1.716 2429.03 8828.19 0.449321 JPL/Horizons solution 8, # obs: 53 (10 days) 2021 Feb 27 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_S_3sig DOP_X_3sig RT_delay_3sig 2021-Feb-25 00:00 *m 163.74472 8.43849 0.04617552365780 0.837 2639.89 9594.55 0.301250 2021-Feb-26 00:00 *m 157.42083 9.57229 0.03171619313693 1.095 2549.88 9267.42 0.206755 2021-Feb-27 00:00 * 141.09005 11.91328 0.01828266531126 2.767 2187.50 7950.38 0.119007 2021-Feb-28 00:00 * 84.37104 12.20498 0.01075693846710 15.098 86.04 312.71 0.070173 2021-Mar-01 00:00 * 31.20844 2.36652 0.01870014616182 8.384 2218.72 8063.82 0.122452 * 2021-Mar-02 00:00 * 16.03636 -1.30239 0.03219432115133 4.280 2554.08 9282.67 0.210674 2021-Mar-03 00:00 * 9.99716 -2.74961 0.04666299914393 3.013 2639.65 9593.67 0.305206 2021-Mar-04 00:00 * 6.81574 -3.49820 0.06144221217338 2.491 2676.11 9726.20 0.401756 2021-Mar-05 00:00 * 4.85491 -3.95223 0.07637679005377 2.199 2698.66 9808.15 0.499329 JPL/Horizons solution 7, # obs: 39 (9 days) Arc isn't any longer, but 5 more measurements relative to s6. 2021 Feb 26 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_S_3sig DOP_X_3sig RT_delay_3sig 2021-Feb-25 00:00 *m 163.74469 8.43851 0.04620540178958 1.102 2821.53 10254.72 0.322057 2021-Feb-26 00:00 *m 157.42095 9.57229 0.03173700125502 2.782 2725.33 9905.09 0.221071 2021-Feb-27 00:00 * 141.09101 11.91322 0.01829500369485 15.872 2338.25 8498.25 0.127303 2021-Feb-28 00:00 * 84.37587 12.20557 0.01076395607769 75.954 173.20 629.49 0.075029 * 2021-Mar-01 00:00 * 31.21075 2.36713 0.01871133175403 37.068 2371.16 8617.88 0.130873 ** 2021-Mar-02 00:00 * 16.03747 -1.30209 0.03221378841150 17.187 2729.69 9920.94 0.225155 2021-Mar-03 00:00 * 9.99787 -2.74941 0.04669148003723 10.765 2821.22 10253.60 0.326183 2021-Mar-04 00:00 * 6.81627 -3.49806 0.06147993155879 7.922 2860.22 10395.35 0.429372 2021-Mar-05 00:00 * 4.85534 -3.95211 0.07642385718038 6.375 2884.34 10482.99 0.533656 Pointing late on Feb. 28 is now good enough to try this. JPL/Horizons solution 5, # obs: 24 (8 days) OCC = 9 2021 Feb 24 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_S_3sig DOP_X_3sig RT_delay_3sig 2021-Feb-25 00:00 *m 163.74510 8.43838 0.04617746032711 4.854 3417.52 12420.83 0.381290 2021-Feb-26 00:00 *m 157.42305 9.57186 0.03172053940840 20.218 3296.66 11981.55 0.259274 2021-Feb-27 00:00 * 141.10198 11.91181 0.01828866112257 101.592 2786.62 10127.84 0.146776 2021-Feb-28 00:00 * 84.42322 12.21030 0.01075737671199 436.206 910.47 3309.05 0.089030 * 2021-Mar-01 00:00 * 31.23140 2.37190 0.01869067439008 198.813 2971.10 10798.34 0.165233 ** 2021-Mar-02 00:00 * 16.04655 -1.29999 0.03218077186308 87.572 3330.21 12103.51 0.281093 2021-Mar-03 00:00 * 10.00333 -2.74819 0.04664642962203 52.500 3427.26 12456.21 0.403892 2021-Mar-04 00:00 * 6.82014 -3.49721 0.06142286205587 37.167 3470.26 12612.49 0.529064 2021-Mar-05 00:00 * 4.85836 -3.95147 0.07635473457436 28.958 3497.78 12712.53 0.655491 2021 DW1 JPL/Horizons solution 6, # obs: 85 (15 days) 2021 Mar 3 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_S_3sig DOP_X_3sig RT_delay_3sig 2021-Feb-25 00:00 *m 101.64455 -20.15283 0.02295638980596 0.577 75.40 274.05 0.020649 2021-Feb-26 00:00 *m 102.48762 -18.93095 0.01995016391913 0.655 75.02 272.66 0.017918 2021-Feb-27 00:00 * 103.63054 -17.26459 0.01695630718958 0.735 74.39 270.35 0.015205 2021-Feb-28 00:00 * 105.24611 -14.87018 0.01398628688021 0.813 73.28 266.34 0.012522 2021-Mar-01 00:00 * 107.67575 -11.17087 0.01106347000756 0.879 71.19 258.73 0.009895 2021-Mar-02 00:00 * 111.69436 -4.83528 0.00824352890318 0.938 66.62 242.12 0.007382 2021-Mar-03 00:00 * 119.46225 7.62831 0.00568970760587 1.380 54.51 198.12 0.005145 2021-Mar-04 00:00 * 139.09053 33.65344 0.00397016926152 6.819 19.48 70.81 0.003702 2021-Mar-05 00:00 * 195.46265 57.83869 0.00426964490314 20.020 33.19 120.63 0.003996 * 2021-Mar-06 00:00 * 241.12294 52.34531 0.00630215342524 24.924 58.83 213.82 0.005769 2021-Mar-07 00:00 * 256.05017 45.16324 0.00894683819240 25.926 67.63 245.81 0.008115 2021-Mar-08 00:00 * 262.41347 40.69959 0.01179221104073 26.237 71.16 258.63 0.010666 2021-Mar-09 00:00 * 265.85910 37.84117 0.01471756240574 26.394 72.83 264.71 0.013306 2021-Mar-10 00:00 * 268.00739 35.88686 0.01767929526504 26.501 73.71 267.88 0.015990 JPL/Horizons solution 3, # obs: 21 (10 days) 2021 Feb 27 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_S_3sig DOP_X_3sig RT_delay_3sig 2021-Feb-25 00:00 *m 101.64457 -20.15286 0.02294990953825 1.849 391.05 1421.27 0.111066 2021-Feb-26 00:00 *m 102.48765 -18.93098 0.01994449500642 2.310 388.99 1413.77 0.096922 2021-Feb-27 00:00 * 103.63059 -17.26461 0.01695144399552 3.428 385.62 1401.50 0.082880 2021-Feb-28 00:00 * 105.24619 -14.87018 0.01398222010541 6.463 379.87 1380.61 0.069007 * 2021-Mar-01 00:00 * 107.67591 -11.17080 0.01106018345636 14.474 369.31 1342.26 0.055433 2021-Mar-02 00:00 * 111.69470 -4.83499 0.00824099189425 36.764 347.66 1263.56 0.042429 2021-Mar-03 00:00 * 119.46318 7.62942 0.00568785554485 107.362 297.20 1080.18 0.030648 2021-Mar-04 00:00 * 139.09427 33.65680 0.00396885497755 308.082 189.80 689.81 0.021754 2021-Mar-05 00:00 * 195.47465 57.83931 0.00426848904803 393.123 139.59 507.34 0.020354 * 2021-Mar-06 00:00 * 241.12976 52.34267 0.00630061492010 285.962 278.67 1012.82 0.028091 2021-Mar-07 00:00 * 256.05426 45.16052 0.00894465749358 225.969 338.85 1231.53 0.039669 2021-Mar-08 00:00 * 262.41657 40.69704 0.01178929614382 198.272 362.95 1319.11 0.052617 2021-Mar-09 00:00 * 265.86174 37.83874 0.01471387508911 183.960 374.21 1360.06 0.066153 2021-Mar-10 00:00 * 268.00979 35.88452 0.01767481698703 175.688 380.09 1381.42 0.079981 JPL/Horizons solution 2, # obs: 15 (8 days) 2021 Feb 24, 26, and 26 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_S_3sig DOP_X_3sig RT_delay_3sig 2021-Feb-25 00:00 *m 101.64462 -20.15287 0.02293141930883 4.227 515.45 1873.37 0.148120 2021-Feb-26 00:00 *m 102.48771 -18.93101 0.01992841098464 7.113 512.73 1863.49 0.129568 2021-Feb-27 00:00 * 103.63066 -17.26466 0.01693774960567 12.820 508.30 1847.39 0.111180 2021-Feb-28 00:00 * 105.24629 -14.87024 0.01397088745588 24.533 500.79 1820.09 0.093054 * 2021-Mar-01 00:00 * 107.67604 -11.17086 0.01105116245628 50.477 487.12 1770.41 0.075375 2021-Mar-02 00:00 * 111.69496 -4.83495 0.00823418241669 115.448 459.70 1670.75 0.058490 2021-Mar-03 00:00 * 119.46393 7.63008 0.00568302355433 304.328 402.46 1462.71 0.043029 2021-Mar-04 00:00 * 139.09809 33.66009 0.00396536798771 783.751 370.45 1346.39 0.029967 2021-Mar-05 00:00 * 195.49155 57.84020 0.00426494573050 870.800 305.10 1108.88 0.026806 * 2021-Mar-06 00:00 * 241.14211 52.33800 0.00629564149408 541.738 371.78 1351.23 0.037428 2021-Mar-07 00:00 * 256.06283 45.15495 0.00893767071625 378.856 445.20 1618.07 0.052584 2021-Mar-08 00:00 * 262.42365 40.69134 0.01178008558137 307.941 477.28 1734.64 0.069439 2021-Mar-09 00:00 * 265.86809 37.83304 0.01470235094979 273.041 492.54 1790.10 0.087102 2021-Mar-10 00:00 * 268.01573 35.87883 0.01766093502537 253.675 500.54 1819.19 0.105191 Pointing is already good enough to detect it during the Feb. 28 1999 RM45 track. JPL/Horizons solution 1 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_S_3sig DOP_X_3sig RT_delay_3sig 2021-Feb-25 00:00 *m 101.64473 -20.15223 0.02295627947375 32.261 1506.96 5476.99 0.350928 2021-Feb-26 00:00 *m 102.48800 -18.92992 0.01994917468002 55.185 1498.00 5444.41 0.297233 2021-Feb-27 00:00 * 103.63130 -17.26282 0.01695445107963 96.230 1482.45 5387.90 0.244334 2021-Feb-28 00:00 * 105.24762 -14.86699 0.01398358896242 174.239 1453.42 5282.40 0.192832 * 2021-Mar-01 00:00 * 107.67885 -11.16473 0.01105998926184 336.327 1392.30 5060.23 0.143982 2021-Mar-02 00:00 * 111.70129 -4.82215 0.00823943033318 718.580 1238.34 4500.68 0.100585 2021-Mar-03 00:00 * 119.48055 7.66049 0.00568556992155 1757.190 783.98 2849.35 0.067828 2021-Mar-04 00:00 * 139.15551 33.72379 0.00396822237402 4105.835 1392.86 5062.30 0.052488 2021-Mar-05 00:00 * 195.62623 57.85332 0.00427282482415 3882.763 2133.78 7755.14 0.101953 * 2021-Mar-06 00:00 * 241.18932 52.32387 0.00630852375222 1861.209 1646.01 5982.33 0.165750 2021-Mar-07 00:00 * 256.07846 45.14752 0.00895487970028 942.089 1525.96 5546.02 0.221646 2021-Mar-08 00:00 * 262.42934 40.68889 0.01180145345562 573.942 1503.91 5465.90 0.275785 2021-Mar-09 00:00 * 265.86955 37.83349 0.01472784012140 431.343 1500.18 5452.34 0.329769 2021-Mar-10 00:00 * 268.01499 35.88107 0.01769053662955 384.905 1499.68 5450.51 0.383874
Apparent Magnitudes, Solar Elongations, Lunar Elongations, and Lunar Illumination: 1999 RM45 JPL/Horizons solution 38 Date__(UT)__HR:MN R.A._(a-appar)_DEC. APmag delta S-O-T /r T-O-M/MN_Illu% 2021-Feb-10 00:00 153.98993 -7.63742 17.794 0.24944454419283 155.8162 /L 135.0/ 4.1220 2021-Feb-11 00:00 153.77581 -7.70086 17.650 0.23689228097724 156.5312 /L 145.7/ 1.0151 2021-Feb-12 00:00 153.53225 -7.75804 17.501 0.22443221664729 157.2220 /L 154.0/ 0.2182 2021-Feb-13 00:00 153.25531 -7.80843 17.347 0.21206265264037 157.8833 /L 157.0/ 1.6532 2021-Feb-14 00:00 152.94011 -7.85136 17.187 0.19978179115986 158.5080 /L 153.4/ 5.1278 2021-Feb-15 00:00 152.58053 -7.88605 17.020 0.18758778978062 159.0876 /L 145.3/ 10.3727 2021-Feb-16 00:00 152.16883 -7.91153 16.846 0.17547883962330 159.6114 /L 135.3/ 17.0806 2021-Feb-17 00:00 151.69499 -7.92655 16.664 0.16345327454411 160.0657 /L 124.5/ 24.9377 2021-Feb-18 00:00 151.14594 -7.92950 16.474 0.15150972558487 160.4330 /T 113.2/ 33.6417 2021-Feb-19 00:00 150.50422 -7.91820 16.274 0.13964734644710 160.6906 /T 101.7/ 42.9066 2021-Feb-20 00:00 149.74611 -7.88968 16.063 0.12786615560391 160.8087 /T 90.0/ 52.4561 2021-Feb-21 00:00 148.83853 -7.83973 15.841 0.11616757675101 160.7474 /T 78.1/ 62.0090 2021-Feb-22 00:00 147.73410 -7.76217 15.606 0.10455532896548 160.4517 /T 66.0/ 71.2614 2021-Feb-23 00:00 146.36262 -7.64755 15.354 0.09303696079209 159.8437 /T 53.7/ 79.8704 2021-Feb-24 00:00 144.61594 -7.48075 15.085 0.08162663478174 158.8080 /T 41.8/ 87.4472 2021-Feb-25 00:00 142.31926 -7.23616 14.795 0.07035050306040 157.1634 /T 31.2/ 93.5650 2021-Feb-26 00:00 139.17337 -6.86726 14.481 0.05925788968933 154.6055 /T 25.9/ 97.7909 2021-Feb-27 00:00 134.62933 -6.28246 14.141 0.04844675742468 150.5800 /T 31.1/ 99.7407 2021-Feb-28 00:00 127.59944 -5.28413 13.788 0.03812817461711 143.9873 /T 46.3/ 99.1482 2021-Mar-01 00:00 115.79945 -3.41671 13.477 0.02880691554209 132.5028 /T 69.5/ 95.9292 2021-Mar-02 00:00 94.94179 0.21186 13.453 0.02177654674710 111.7431 /T 103.1/ 90.2151 2021-Mar-03 00:00 63.40623 5.48517 14.404 0.01965563527390 80.2121 /T 147.9/ 82.3440 2021-Mar-04 00:00 34.41887 8.88747 17. 0.02379505109823 51.6705 /T 168.3/ 72.8110 2021-Mar-05 00:00 16.81039 9.89128 19. 0.03184871358399 34.7265 /T 138.5/ 62.1991 2021-Mar-06 00:00 6.79983 10.04903 22. 0.04161619837918 25.3972 /T 115.6/ 51.1139 2021-Mar-07 00:00 0.69307 9.98801 23. 0.05216041477205 20.0160 /T 96.6/ 40.1344 2021-Mar-08 00:00 356.66418 9.87606 25. 0.06311271283621 16.7978 /T 79.9/ 29.7847 2021-Mar-09 00:00 353.83397 9.75737 26. 0.07431415814557 14.8813 /T 64.7/ 20.5187 2021-Mar-10 00:00 351.74838 9.64314 27. 0.08568983431974 13.8083 /T 50.6/ 12.7118 2007 BG JPL/Horizons solution 52 Date__(UT)__HR:MN R.A._(a-appar)_DEC. APmag delta S-O-T /r T-O-M/MN_Illu% 2021-Feb-10 00:00 140.03004 -63.07486 17.150 0.10507388881823 102.5186 /T 91.5/ 4.1220 2021-Feb-11 00:00 136.57116 -63.94098 17.082 0.10065661962496 101.7778 /T 94.5/ 1.0151 2021-Feb-12 00:00 132.56581 -64.77211 17.018 0.09631950111751 100.8928 /T 96.3/ 0.2182 2021-Feb-13 00:00 127.92698 -65.53674 16.956 0.09207662818186 99.8451 /T 97.0/ 1.6532 2021-Feb-14 00:00 122.57121 -66.19097 16.899 0.08794437592365 98.6144 /T 96.5/ 5.1278 2021-Feb-15 00:00 116.43676 -66.67590 16.849 0.08394181296689 97.1782 /T 95.1/ 10.3727 2021-Feb-16 00:00 109.51209 -66.91645 16.806 0.08009115112698 95.5121 /T 92.9/ 17.0806 2021-Feb-17 00:00 101.87046 -66.82356 16.774 0.07641820204546 93.5908 /T 90.3/ 24.9377 2021-Feb-18 00:00 93.69591 -66.30181 16.756 0.07295278707328 91.3888 /T 87.6/ 33.6417 2021-Feb-19 00:00 85.27740 -65.26235 16.755 0.06972901195962 88.8825 /T 85.3/ 42.9066 2021-Feb-20 00:00 76.95772 -63.63808 16.775 0.06678527363407 86.0526 /T 83.9/ 52.4561 2021-Feb-21 00:00 69.05461 -61.39529 16.822 0.06416382030942 82.8883 /T 83.9/ 62.0090 2021-Feb-22 00:00 61.79517 -58.53815 16.900 0.06190965805473 79.3908 /T 85.6/ 71.2614 2021-Feb-23 00:00 55.29304 -55.10689 17.017 0.06006862171472 75.5790 /T 89.3/ 79.8704 2021-Feb-24 00:00 49.56507 -51.17298 17.178 0.05868454845800 71.4927 /T 95.3/ 87.4472 2021-Feb-25 00:00 44.56504 -46.83344 17.389 0.05779573267012 67.1945 /T 103.2/ 93.5650 2021-Feb-26 00:00 40.21552 -42.20422 17.651 0.05743116285600 62.7674 /T 112.9/ 97.7909 2021-Feb-27 00:00 36.42990 -37.41163 17.967 0.05760731361807 58.3087 /T 123.8/ 99.7407 2021-Feb-28 00:00 33.12484 -32.58192 18. 0.05832630623723 53.9196 /T 135.0/ 99.1482 2021-Mar-01 00:00 30.22590 -27.83048 19. 0.05957595426510 49.6945 /T 145.2/ 95.9292 2021-Mar-02 00:00 27.66919 -23.25301 19. 0.06133166819083 45.7112 /T 151.7/ 90.2151 2021-Mar-03 00:00 25.40110 -18.92060 20. 0.06355966821420 42.0256 /T 151.1/ 82.3440 2021-Mar-04 00:00 23.37710 -14.87902 20. 0.06622069410759 38.6704 /T 143.6/ 72.8110 2021-Mar-05 00:00 21.56040 -11.15143 21. 0.06927346994688 35.6570 /T 132.4/ 62.1991 2021-Mar-06 00:00 19.92060 -7.74297 21. 0.07267745858866 32.9802 /T 119.7/ 51.1139 2015 BY310 JPL/Horizons solution 57 Date__(UT)__HR:MN R.A._(a-appar)_DEC. APmag delta S-O-T /r T-O-M/MN_Illu% 2021-Feb-20 00:00 115.22151 21.84179 17.939 0.08570085765040 141.7339 /T 49.1/ 52.4561 2021-Feb-21 00:00 114.17208 20.89557 17.880 0.08179694463165 139.9168 /T 36.2/ 62.0090 2021-Feb-22 00:00 113.06014 19.84449 17.820 0.07796072478857 138.0182 /T 23.2/ 71.2614 2021-Feb-23 00:00 111.87794 18.67490 17.759 0.07419572616888 136.0266 /T 10.7/ 79.8704 2021-Feb-24 00:00 110.61634 17.37086 17.698 0.07050685232198 133.9283 /T 8.570/ 87.4472 2021-Feb-25 00:00 109.26451 15.91389 17.638 0.06690069450681 131.7071 /T 21.1/ 93.5650 2021-Feb-26 00:00 107.80968 14.28257 17.580 0.06338591109285 129.3439 /T 35.6/ 97.7909 2021-Feb-27 00:00 106.23679 12.45228 17.523 0.05997367973063 126.8161 /T 50.8/ 99.7407 2021-Feb-28 00:00 104.52815 10.39514 17.471 0.05667822205897 124.0982 /T 66.3/ 99.1482 2021-Mar-01 00:00 102.66299 8.08020 17.424 0.05351739091238 121.1613 /T 82.1/ 95.9292 2021-Mar-02 00:00 100.61707 5.47431 17.385 0.05051329282918 117.9742 /T 97.7/ 90.2151 2021-Mar-03 00:00 98.36223 2.54397 17.358 0.04769288697580 114.5052 /T 113.0/ 82.3440 2021-Mar-04 00:00 95.86598 -0.74131 17.346 0.04508844489814 110.7252 /T 127.1/ 72.8110 2021-Mar-05 00:00 93.09127 -4.40338 17.354 0.04273766613590 106.6131 /T 138.7/ 62.1991 2021-Mar-06 00:00 89.99665 -8.44746 17.390 0.04068313206464 102.1633 /T 144.7/ 51.1139 2021-Mar-07 00:00 86.53706 -12.85177 17.458 0.03897069192996 97.3955 /T 142.3/ 40.1344 2021-Mar-08 00:00 82.66592 -17.55678 17.565 0.03764641406115 92.3650 /T 132.7/ 29.7847 2021-Mar-09 00:00 78.33907 -22.45776 17.716 0.03675203932892 87.1694 /T 119.5/ 20.5187 2021-Mar-10 00:00 73.52134 -27.40576 17.913 0.03631950345803 81.9474 /T 104.9/ 12.7118 2021-Mar-11 00:00 68.19622 -32.22098 18.152 0.03636584684596 76.8654 /T 90.3/ 6.6534 2021-Mar-12 00:00 62.37798 -36.71760 18.428 0.03689018759927 72.0945 /T 76.8/ 2.5401 2021-Mar-13 00:00 56.12374 -40.73342 18.727 0.03787391863745 67.7824 /T 65.5/ 0.4709 2021-Mar-14 00:00 49.54046 -44.15454 19.035 0.03928403842906 64.0331 /T 57.5/ 0.4493 2021-Mar-15 00:00 42.78121 -46.92768 19.336 0.04107833538534 60.8970 /T 54.1/ 2.3931 2021 CF6 JPL/Horizons solution 8 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta APmag S-brt S-O-T /r T-O-M/MN_Illu% 2021-Feb-20 00:00 86.51547 -7.32094 0.08827750201733 20.873 n.a. 110.8153 /T 36.2/ 52.1906 2021-Feb-21 00:00 86.05613 -7.22529 0.08369031423212 20.795 n.a. 109.5512 /T 31.9/ 61.6210 2021-Feb-22 00:00 85.56179 -7.11413 0.07909329609692 20.712 n.a. 108.2509 /T 31.6/ 70.7852 2021-Feb-23 00:00 85.02375 -6.98525 0.07448667928318 20.624 n.a. 106.9058 /T 35.8/ 79.3567 2021-Feb-24 00:00 84.43099 -6.83573 0.06987113922563 20.530 n.a. 105.5054 /T 43.6/ 86.9580 2021-Feb-25 00:00 83.76940 -6.66169 0.06524788379029 20.430 n.a. 104.0358 /T 53.7/ 93.1655 2021-Feb-26 00:00 83.02057 -6.45795 0.06061877709283 20.323 n.a. 102.4790 /T 65.2/ 97.5363 2021-Feb-27 00:00 82.16018 -6.21741 0.05598651587934 20.209 n.a. 100.8113 /T 77.8/ 99.6610 2021-Feb-28 00:00 81.15535 -5.93026 0.05135489033235 20.087 n.a. 99.0003 /T 91.1/ 99.2361 2021-Mar-01 00:00 79.96068 -5.58263 0.04672919021280 19.957 n.a. 97.0015 /T 104.8/ 96.1371 2021-Mar-02 00:00 78.51162 -5.15438 0.04211687445016 19.818 n.a. 94.7512 /T 118.7/ 90.4644 2021-Mar-03 00:00 76.71349 -4.61551 0.03752873608873 19.671 n.a. 92.1560 /T 132.5/ 82.5449 2021-Mar-04 00:00 74.42206 -3.91972 0.03298103195050 19.519 n.a. 89.0738 /T 145.3/ 72.8856 2021-Mar-05 00:00 71.40808 -2.99283 0.02849957681974 19.368 n.a. 85.2787 /T 154.7/ 62.1001 2021-Mar-06 00:00 67.28937 -1.71127 0.02412806602112 19.236 n.a. 80.3967 /T 155.0/ 50.8328 2021-Mar-07 00:00 61.39800 0.13655 0.01994602340502 19.168 n.a. 73.7826 /T 144.1/ 39.7003 2021-Mar-08 00:00 52.53274 2.90294 0.01610921240575 19.287 n.a. 64.3202 /T 126.1/ 29.2547 2021-Mar-09 00:00 38.66067 7.03257 0.01293642501022 20. n.a. 50.3524 /T 102.2/ 19.9649 2021-Mar-10 00:00 17.65308 12.31181 0.01102421344513 22. n.a. 31.6125 /T 72.4/ 12.2068 * 2021-Mar-11 00:00 351.91601 16.37106 0.01105238867583 25. n.a. 20.0899 /T 43.2/ 6.2572 * 2021-Mar-12 00:00 329.79552 17.33617 0.01300946177869 23. n.a. 30.3368 /L 32.8/ 2.2907 2021-Mar-13 00:00 314.91396 16.61414 0.01621002145638 21. n.a. 42.5859 /L 43.9/ 0.3795 2021-Mar-14 00:00 305.43386 15.58354 0.02006535989158 21. n.a. 51.4594 /L 59.5/ 0.5010 2021-Mar-15 00:00 299.19429 14.66707 0.02426250871332 21. n.a. 57.7942 /L 74.3/ 2.5512 Fortunately the Moon quicky moves away from this object several days before the best days for radar. Prospects for astrometry are good. 2021 DE Solution 5 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta APmag S-brt S-O-T /r T-O-M/MN_Illu% 2021-Feb-25 00:00 163.70963 8.47225 0.04616107517662 18.054 n.a. 174.6628 /L 35.3/ 93.1655 2021-Feb-26 00:00 157.36692 9.62061 0.03170841860793 17.024 n.a. 177.8968 /T 16.0/ 97.5363 2021-Feb-27 00:00 140.99260 11.99143 0.01828732488524 16.524 n.a. 160.7195 /T 16.5/ 99.6610 2021-Feb-28 00:00 84.29352 12.30944 0.01078737325694 17.000 n.a. 104.4290 /T 85.1/ 99.2361 * 2021-Mar-01 00:00 31.25147 2.44272 0.01872583851823 21. n.a. 50.0388 /T 152.7/ 96.1371 * 2021-Mar-02 00:00 16.07465 -1.25503 0.03221119799343 24. n.a. 33.4531 /T 175.5/ 90.4644 2021-Mar-03 00:00 10.02723 -2.71636 0.04667403759350 26. n.a. 26.2713 /T 156.0/ 82.5449 2021-Mar-04 00:00 6.84021 -3.47278 0.06144863584574 28. n.a. 22.0417 /T 138.4/ 72.8856 2021-Mar-05 00:00 4.87554 -3.93172 0.07637915740502 29. n.a. 19.0760 /T 122.1/ 62.1001 Proximity to the full Moon is a problem! 2021 DW1 JPL/Horizons solution 1 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta APmag S-brt S-O-T /r T-O-M/MN_Illu% 2021-Feb-24 00:00 100.93108 -21.02100 0.02597497789916 19.486 n.a. 116.7241 /T 47.6/ 86.9580 2021-Feb-25 00:00 101.56201 -20.08129 0.02296244609545 19.212 n.a. 116.9884 /T 50.7/ 93.1655 2021-Feb-26 00:00 102.39367 -18.84861 0.01995602509165 18.895 n.a. 117.5126 /T 55.7/ 97.5363 2021-Feb-27 00:00 103.52123 -17.16794 0.01696204823164 18.517 n.a. 118.4268 /T 62.2/ 99.6610 2021-Feb-28 00:00 105.11507 -14.75372 0.01399203194235 18.056 n.a. 119.9640 /T 69.8/ 99.2361 * 2021-Mar-01 00:00 107.51182 -11.02544 0.01106943685617 17.474 n.a. 122.5735 /T 77.9/ 96.1371 2021-Mar-02 00:00 111.47559 -4.64459 0.00825012588697 16.706 n.a. 127.1893 /T 86.0/ 90.4644 2021-Mar-03 00:00 119.13879 7.89358 0.00569769812143 15.671 n.a. 135.5344 /T 93.1/ 82.5449 2021-Mar-04 00:00 138.55269 34.03642 0.00398002967253 14.680 n.a. 143.1862 /T 94.9/ 72.8856 2021-Mar-05 00:00 195.17621 58.36783 0.00427789168232 15.401 n.a. 122.9865 /L 85.4/ 62.1001 * 2021-Mar-06 00:00 241.31677 52.70277 0.00630750770094 16.836 n.a. 103.8403 /L 76.0/ 50.8328 2021-Mar-07 00:00 256.22760 45.39769 0.00895075391747 17.915 n.a. 94.7862 /L 70.9/ 39.7003 2021-Mar-08 00:00 262.55243 40.87129 0.01179553703388 18.686 n.a. 90.2372 /L 68.8/ 29.2547 2021-Mar-09 00:00 265.97023 37.97629 0.01472071283918 19.264 n.a. 87.7278 /L 69.2/ 19.9649 2021-Mar-10 00:00 268.09893 35.99829 0.01768249140194 19.716 n.a. 86.2711 /L 71.6/ 12.2068
Setups
CW setup: --------------------------------------------------------------------------- TX polarization RCP RCV polarization LCP & RCP Frequency hops: no hopping Bandwidth: 5000 Hz TXoffset +500 Hz FFT 5000 for 1.0 Hz resolution Ranging setups: --------------------------------------------------------------------------- 10-usec baud 10 usec code 127 PRP 1270 usec ncoh 1 bandwidth 787 Hz FFT 128 resolution 6.15 Hz TXoffset +100 Hz (echo in column 80) --------------------------------------------------------------------------- 11-usec baud 11 usec code 127 PRP 1397 usec ncoh 1 bandwidth 716 Hz FFT 128 resolution 5.6 Hz TXoffset +100 Hz (echo in column 82) ------------------------------------------------------------------------- 1-usec baud 1 usec code 255 ncoh 8 bandwidth 245 Hz FFT 128 resolution 3.8 Hz TXoffset +50 Hz (echo in column 116) ---------------------------------------------------------------------
Instructions
NOTE: Data should be moved to the appropriate subdirectories in aardvark:/export/data0/2007bg/raw/
POINTING:
OSOD and predicts are on aardvark: POINTING ...Not yet available... Transmit offsets are given in millidegrees.
PRDX.OUT.14f-14-14.s?? TRANSMITTER: STATION #14, RECEIVER: STATION #14 RECEIVER U.T. RANGE DOPPLER LHA DEC RA EL
2007 BG GOLDSTONE MASTERLOG
============================================================================== ----------------------------------------------------- ...Not yet available... -----------------------------------------------------
Dr. Lance A. M. Benner | PHONE: (818) 354-7412 Mail Stop 183-601 | FAX: (818) 393-4445 Jet Propulsion Laboratory | email: lance.benner@jpl.nasa.gov California Institute of Technology | Plan: To live long and prosper Pasadena, CA 91109-8099 https://echo.jpl.nasa.gov/asteroids/2007BG/2007BG.goldstone.planning.html
Asteroid Radar Astronomy