Goldstone Radar Observations Planning: Asteroids 1999 KW4 and 2001 KB67
(66391) 1999 KW4 1999 KW4 is a binary system that was discovered by LINEAR on May 20, 1999. 1999 KW4 was imaged extensively with radar at Goldstone and Arecibo during a close encounter within 0.032 au in May and June of 2001, from which Ostro et al. (2006) estimated 3D models of the primary, referred to as "Alpha," and the secondary, designated as "Beta." The Alpha model has major axes of 1.5 x 1.5 x 1.3 km, an effective diameter of 1.3 km, and a shape that resembles a top. Alpha also has a pronounced ridge along its equator. The Beta model is significantly smaller with major axes of 0.57 x 0.46 x 0.35 km and its long axis is oriented toward Alpha (albeit with small oscillations). 1999 KW4 was the third binary near-Earth asteroid imaged by radar, following 2000 DP107 and 2000 UG11 and the first imaged in detail. Alpha has a rotation period of 2.76 h and a pole direction of (lambda, beta) = (326, -65) degrees. The orbital and rotation periods of Beta are synchronous with a period of 17.42 hours, but Beta librates during its motion about Alpha, and there are periodic changes in the motion caused by the non-spherica shape of Alpha and the deep perihelion of only 0.200 au, which results in solar tidal effects (Scheeres et al. 2006). The bulk densities of Alpha and Beta are 1.97+-0.24 and 2.81+0.82-0.63 g/cm^3. For additional details about 1999 KW4's physical and orbital properties, please see Ostro et al. (2006) and Scheeres et al. (2006). Additional radar observations were conducted at Arecibo in 2002 and 2017 but at much lower signal-to-noise ratios. 1999 KW4 will approach within 0.078 au on 2018 May 27. Due to the klystron situation at Goldstone, which limits monostatic transmitter power to only 100 kW, 1999 KW4 will be a weak target. The SNRs will be dramatically stronger at Arecibo, but unfortunately a generator problem there has probably cancelled observations. Observations are scheduled at Goldstone on May 26 and June 1 during times that overlap the schedule for 2001 KB67. 1999 KW4 has been classified as a "Potentially Hazardous Asteroid" by the Minor Planet Center. (68347) 2001 KB67 2001 KB67 was discovered by LINEAR on 2001 May 30. This object has an absolute magnitude of 19.8, suggesting a diameter within a factor of two of 0.4 km, but otherwise nothing is known about its physical properties. This object has not been observed with radar previously. 2001 KB67 will approach within 9.3. lunar distances on May 29 when it will be a moderately strong radar target at Goldstone and a very strong imaging target at Arecibo. Time is scheduled at Goldstone on four dates between May 26-June 1. No tracks are scheduled at Arecibo due to generator problems. The 2018 flyby will be the closest since 1914 and until 2051. The Minor Planet Center has classified 2001 KB67 as a "Potentially Hazardous Asteroid."
Orbital and Physical Characteristics
Name 1999 KW4 2001 KB67
Number 66391 68347
Discoverer LINEAR LINEAR
Discovery date 1999 May 20 2001 May 30
orbit type Aten Aten
Close approach date 2018 May 27 2018 May 29
Close approach dist. 0.078 au 0.024 au
Close approach dist. 30.4 lunar distances 9.3 lunar distances
semimajor axis 0.642 au 0.963 au
eccentricity 0.688 0.380
inclination 38.9 deg 17.1 deg
orbital period 0.515 y 0.945 y
perihelion distance 0.200 au 0.597 au
aphelion distance 4.824 au 1.329 au
MOID 0.0137 au 0.0135 au
Tisserand parameter 8.500 6.163 Both values are asteroidal.
absolute magnitude (H) 16.5 19.8
Primary diameter 1.32 km BINARY ~0.4 km
Secondary diameter 0.45 km N/A
optical albedo 0.26 unknown
spectral class S unknown
Primary rotation period 2.7645 h 6.35 h B. D. Warner, pers. comm.
Secondary rotation period 17.42 h N/A
lightcurve amplitude 0.12 mag 0.2 mag B. D. Warner, pers. comm.
pole direction (lambda, beta) = (326, -62) unknown
PHA PHA
Last update: 2018 June 6
1999 KW4 Close Approaches Within 0.1 au: 1900-2100
Date (TDB) Body CA Dist MinDist MaxDist Vrel TCA3Sg Nsigs P_i/p
A.D. 1913 May 26.71707 Earth .074553 .074551 .074554 19.928 0.08 1.82E6 .000000
A.D. 1914 May 25.18226 Earth .037573 .037571 .037575 21.555 0.00 9.50E5 .000000
A.D. 1931 May 26.08135 Earth .029699 .029697 .029701 20.492 0.05 1.03E6 .000000
A.D. 1932 May 25.06168 Earth .091132 .091130 .091134 22.770 0.03 1.13E6 .000000
A.D. 1948 May 27.37092 Earth .094582 .094581 .094583 19.768 0.05 2.55E6 .000000
A.D. 1949 May 25.21601 Earth .017230 .017229 .017230 21.095 0.01 8.50E5 .000000
A.D. 1966 May 26.32639 Earth .044309 .044309 .044310 20.286 0.02 1.19E6 .000000
A.D. 1967 May 25.83128 Earth .073726 .073725 .073726 22.364 0.01 1.05E6 .000000
A.D. 1983 May 28.36245 Earth .096906 .096906 .096907 19.753 0.01 3.89E6 .000000
A.D. 1984 May 25.14801 Earth .016075 .016075 .016075 21.071 0.00 8.00E5 .000000
A.D. 2001 May 25.97992 Earth .032332 .032332 .032332 20.469 0.00 4.47E8 .000000
A.D. 2002 May 25.90999 Earth .088929 .088929 .088929 22.743 0.00 2.06E7 .000000
A.D. 2018 May 27.55763 Earth .078181 .078181 .078181 19.900 0.01 1.92E6 .000000
A.D. 2019 May 25.96154 Earth .034640 .034640 .034640 21.513 0.00 8.00E5 .000000
A.D. 2036 May 25.57154 Earth .015529 .015529 .015529 20.798 0.01 8.17E5 .000000
A.D. 2053 May 27.12957 Earth .067820 .067819 .067821 20.008 0.03 1.49E6 .000000
A.D. 2054 May 25.88683 Earth .045694 .045694 .045695 21.760 0.00 7.42E5 .000000
A.D. 2071 May 26.53499 Earth .017518 .017517 .017518 20.740 0.02 8.19E5 .000000
A.D. 2088 May 27.67892 Earth .086544 .086543 .086545 19.844 0.05 1.85E6 .000000
A.D. 2089 May 25.84400 Earth .023855 .023854 .023856 21.300 0.01 7.33E5 .000000
1999 KW4 approaches within 0.05 au of Earth several times each century. This trend exists from
at least 1600-2500.
2001 KB67 Close Approaches Within 0.1 au: 1900-2100
Date (TDB) Body CA Dist MinDist MaxDist Vrel TCA3Sg Nsigs P_i/p
A.D. 1914 May 29.80534 Earth .017169 .017163 .017176 14.088 0.37 1.84E5 .000000
A.D. 1949 May 28.15403 Earth .042186 .042174 .042198 12.884 0.40 2.26E5 .000000
A.D. 1966 May 31.60400 Earth .063671 .063647 .063695 15.327 1.26 1.80E5 .000000
A.D. 2001 May 28.00646 Earth .055321 .055320 .055321 12.593 0.06 3.98E5 .000000
A.D. 2018 May 29.11498 Earth .024420 .024418 .024421 13.339 0.08 2.32E5 .000000
A.D. 2051 May 30.63099 Earth .022206 .022203 .022209 14.175 0.17 2.31E5 .000000
A.D. 2068 May 27.76706 Earth .069700 .069697 .069703 12.263 0.10 4.16E5 .000000
Orbital motion of 1999 KW4 from December 2017 until July 2019 shown in helicentric reference frame. The asteroid makes two close flybys during this interval. The animation begins with an oblique view and then tilts to a perspective looking down on the plane of Earth's orbit from the north. The animation illustrates the unusually eccentric orbit and deep perihelion of only 0.200 au, which is inside the semimajor axis of Mercury. Close Earth encounters tend to be relatively long because they occur near aphelion when 1999 KW4's orbital motion is slow.
1999 KW4 https://minorplanetcenter.net/mpec/J99/J99K28.html 2001 KB67 https://minorplanetcenter.net/mpec/K01/K01K53.html
1999 KW4 Goldstone SNRs PRIMARY (ALPHA) 1999 KW4: D = 1.32 km, P = 2.765 h, OC albedo = 0.11, pole = (326, -62) DOY start date window RA, dec dist delta runs SNR/day SNR/run 142 2018 May 22 08:50-16:48 315, -6 0.097 -16 147 11 1 143 2018 May 23 08:17-16:38 310, -2 0.091 -12 164 15 1 144 2018 May 24 07:41-16:26 305, +2 0.086 -6 183 20 2 145 2018 May 25 07:02-16:11 300, +6 0.082 0 201 24 2 146 2018 May 26 06:21-15:55 293, +11 0.079 +7 217 28 2 Scheduled 1340-1555 (Start 30 minutes into precal) 147 2018 May 27 05:38-15:36 286, +16 0.078 +14 229 31 2 148 2018 May 28 04:53-15:15 279, +21 0.079 +21 236 31 2 149 2018 May 29 04:10-14:52 272, +25 0.081 +28 238 29 2 150 2018 May 30 03:27-14:28 265, +28 0.085 +34 234 25 2 151 2018 May 31 02:48-14:03 258, +31 0.089 +39 226 21 2 152 2018 Jun 01 02:11-13:39 251, +33 0.095 +44 216 17 1 Scheduled 0755-0930 (Start 30 minutes into precal) 153 2018 Jun 02 01:39-13:16 245, +34 0.102 +47 204 13 1 154 2018 Jun 03 01:10-12:54 240, +36 0.110 +50 192 10 1 SECONDARY (BETA) 1999 KW4: D = 0.45 km, P = 17.42 h, OC albedo = 0.11, pole = (326, -62) DOY start date window RA, dec dist delta runs SNR/day SNR/run 143 2018 May 23 08:17-16:38 310, -2 0.091 -12 164 8 1 144 2018 May 24 07:41-16:26 305, +2 0.086 -6 183 10 1 145 2018 May 25 07:02-16:11 300, +6 0.082 0 201 12 1 146 2018 May 26 06:21-15:55 293, +11 0.079 +7 217 14 1 Scheduled 147 2018 May 27 05:38-15:36 286, +16 0.078 +14 229 15 1 148 2018 May 28 04:53-15:15 279, +21 0.079 +21 236 15 1 149 2018 May 29 04:10-14:52 272, +25 0.081 +28 238 14 1 150 2018 May 30 03:27-14:28 265, +28 0.085 +34 234 13 1 151 2018 May 31 02:48-14:03 258, +31 0.089 +39 226 10 1 152 2018 Jun 01 02:11-13:39 251, +33 0.095 +44 216 8 1 Scheduled 153 2018 Jun 02 01:39-13:16 245, +34 0.102 +47 204 7 1 These SNRs assume Ptx = 100 kW and Tsys = 17 K. SNRs also use the radar albedo, effective diameter, and spin vector estimated from the 2001 radar and lightcurve observations. 1999 KW4 Arecibo SNRs PRIMARY (Alpha) SNRs 1999 KW4 Alpha: D = 1.32 km, P = 2.765 h, OC albedo = 0.11, pole = (326, -62) start date window RA, dec dist delta runs SNR/day SNR/run 2018 May 24 08:04-09:25 306, +1 0.086 -7 28 290 61 2018 May 25 07:17-09:20 300, +6 0.082 0 45 520 83 Scheduled 2018 May 26 06:36-09:03 294, +11 0.079 +6 55 670 95 Scheduled 2018 May 27 05:59-08:38 287, +15 0.078 +13 61 760 100 Scheduled 2018 May 28 05:24-08:07 280, +20 0.079 +20 62 760 100 Scheduled 2018 May 29 04:53-07:31 273, +24 0.081 +27 59 700 95 Scheduled 2018 May 30 04:25-06:53 266, +28 0.084 +33 53 590 85 Scheduled 2018 May 31 04:00-06:14 259, +30 0.089 +39 45 450 73 Scheduled 2018 Jun 01 03:38-05:36 252, +33 0.095 +43 37 330 60 Scheduled 2018 Jun 02 03:18-05:00 246, +34 0.101 +47 30 220 45 2018 Jun 03 03:00-04:28 241, +35 0.109 +50 24 150 33 2018 Jun 04 02:43-03:59 236, +36 0.117 +52 19 100 25 2018 Jun 05 02:27-03:33 232, +37 0.126 +54 15 69 19 2018 Jun 06 02:12-03:11 228, +37 0.135 +55 13 50 14 2018 Jun 07 01:57-02:53 225, +37 0.144 +56 11 36 11 2018 Jun 08 01:42-02:37 222, +37 0.154 +57 10 28 9 2018 Jun 09 01:28-02:24 219, +37 0.164 +58 10 23 7 2018 Jun 10 01:14-02:12 217, +37 0.174 +58 10 19 6 2018 Jun 11 01:01-02:02 215, +37 0.184 +59 10 16 5 2018 Jun 12 00:48-01:53 214, +37 0.194 +59 10 13 4 2018 Jun 13 00:36-01:45 212, +37 0.204 +59 10 11 4 2018 Jun 14 00:25-01:37 211, +36 0.215 +59 10 10 3 SECONDARY (Beta) SNRs 1999 KW4 Beta: D = 0.45 km, P = 17.42 h, OC albedo = 0.11, pole = (326, -62) start date window RA, dec dist delta runs SNR/day SNR/run 2018 May 24 08:04-09:25 306, +1 0.086 -7 28 150 30 2018 May 25 07:17-09:20 300, +6 0.082 0 45 260 42 Scheduled 2018 May 26 06:36-09:03 294, +11 0.079 +6 55 330 47 Scheduled 2018 May 27 05:59-08:38 287, +15 0.078 +13 61 380 50 Scheduled 2018 May 28 05:24-08:07 280, +20 0.079 +20 62 380 50 Scheduled 2018 May 29 04:53-07:31 273, +24 0.081 +27 59 350 47 Scheduled 2018 May 30 04:25-06:53 266, +28 0.084 +33 53 290 42 Scheduled 2018 May 31 04:00-06:14 259, +30 0.089 +39 45 230 36 Scheduled 2018 Jun 01 03:38-05:36 252, +33 0.095 +43 37 170 30 Scheduled 2018 Jun 02 03:18-05:00 246, +34 0.101 +47 30 110 23 2018 Jun 03 03:00-04:28 241, +35 0.109 +50 24 75 17 2018 Jun 04 02:43-03:59 236, +36 0.117 +52 19 50 12 2018 Jun 05 02:27-03:33 232, +37 0.126 +54 15 34 9 2018 Jun 06 02:12-03:11 228, +37 0.135 +55 13 25 7 2018 Jun 07 01:57-02:53 225, +37 0.144 +56 11 18 6 2018 Jun 08 01:42-02:37 222, +37 0.154 +57 10 14 5 2018 Jun 09 01:28-02:24 219, +37 0.164 +58 10 11 4 2018 Jun 10 01:14-02:12 217, +37 0.174 +58 10 9 3 Arecibo SNRs assume Ptx = 400 kW and Tsys = 25 K.
2001 KB67 Goldstone SNRs 2001 KB67: D = 0.4 km, P = 2.2 h, OC albedo = 0.1 DOY start date window RA, dec dist runs SNR/day SNR/run 142 2018 May 22 13:56-22:08 33, -4 0.055 272 16 1 143 2018 May 23 13:32-21:57 30, -1 0.048 320 28 2 144 2018 May 24 13:03-21:45 26, +2 0.042 382 50 3 145 2018 May 25 12:26-21:29 20, +6 0.036 466 95 5 146 2018 May 26 11:38-21:06 12, +11 0.031 572 180 8 Scheduled. Overlaps Arecibo 1340-1417 UT 147 2018 May 27 10:36-20:34 1, +18 0.027 696 320 13 Scheduled. No Arecibo overlap. 148 2018 May 28 09:17-19:46 346, +25 0.025 805 460 17 149 2018 May 29 07:47-18:42 328, +32 0.025 848 470 18 Scheduled. No Arecibo overlap. 150 2018 May 30 06:18-17:33 310, +35 0.027 806 350 14 151 2018 May 31 05:05-16:31 294, +35 0.030 710 210 9 152 2018 Jun 01 04:12-15:40 282, +34 0.035 607 110 5 Scheduled. No Arecibo overlap. 153 2018 Jun 02 03:35-15:00 273, +33 0.041 516 62 3 154 2018 Jun 03 03:08-14:29 267, +31 0.047 442 35 2 155 2018 Jun 04 02:48-14:04 262, +30 0.054 383 21 1 Goldstone SNRs assume Ptx = 100 kW and Tsys = 17 K. 2001 KB67 Arecibo SNRs start date window RA, dec dist runs SNR/day SNR/run 2018 May 24 13:27-14:44 26, +1 0.043 55 690 100 2018 May 25 12:41-14:37 21, +5 0.037 99 1900 210 Scheduled 2018 May 26 11:53-14:17 13, +10 0.031 143 4100 360 Scheduled 2018 May 27 10:59-13:37 3, +17 0.027 183 7500 580 Scheduled 2018 May 28 10:00-12:33 348, +24 0.025 201 11000 790 Scheduled 2018 May 29 08:58-11:05 331, +31 0.024 167 10000 840 Scheduled 2018 May 30 07:57-09:31 312, +35 0.026 114 5800 600 Scheduled 2018 May 31 06:54-08:18 296, +35 0.030 91 3200 360 Scheduled 2018 Jun 01 05:54-07:31 283, +35 0.034 88 2000 230 Scheduled 2018 Jun 02 05:06-06:59 274, +33 0.040 89 1300 150 2018 Jun 03 04:29-06:36 268, +32 0.046 84 770 92 2018 Jun 04 04:01-06:17 263, +30 0.053 79 480 57 2018 Jun 05 03:39-06:02 259, +29 0.060 73 300 38 2018 Jun 06 03:21-05:50 256, +28 0.067 68 200 25 2018 Jun 07 03:06-05:38 254, +27 0.074 63 130 18 2018 Jun 08 02:54-05:29 252, +26 0.081 58 93 13 2018 Jun 09 02:42-05:20 251, +26 0.089 54 66 9 2018 Jun 10 02:33-05:12 250, +25 0.096 50 48 7 2018 Jun 11 02:24-05:04 249, +24 0.103 47 36 6 2018 Jun 12 02:16-04:57 248, +24 0.111 44 27 4 2018 Jun 13 02:08-04:51 247, +23 0.119 41 21 3 2018 Jun 14 02:01-04:44 246, +23 0.126 39 16 3 2018 Jun 15 01:54-04:38 246, +22 0.134 37 13 2 Arecibo SNRs assume Ptx = 400 kW and Tsys = 25 K
Track Assignments
146 1310 1440 1910 1940 DSS-14 GSSR AST 1999 KW4/2001 KB67 147 1450 1620 2030 2100 DSS-14 GSSR AST 2001 KB67 149 1445 1615 1745 1815 DSS-14 GSSR AST 2001 KB67 152 0725 0855 0930 1000 DSS-14 GSSR AST 1999 KW4/2001 KB67 Goldstone Schedule in more detail: UT UT PDT EDT Round-trip Monostatic Duration DOY Date Target TX Window TX Window TX Window time (sec) SNR/RTT hours Observer 146 May 26 1999 KW4 1340-1555 0640-0855 May 26 0940-1155 May 26 79 2 2:15 Benner 2001 KB67 1340-1910 0640-1210 May 26 0940-1510 May 26 31 8 5:30 Benner 147 May 27 2001 KB67 1520-2030 0820-1330 May 27 1120-1630 May 27 27 13 5:10 Benner 149 May 29 2001 KB67 1515-1745 0815-1045 May 29 1115-1345 May 29 25 18 2:30 Brozovic 152 Jun 1 1999 KW4 0755-0930 0055-0230 Jun 1 0355-0530 Jun 1 95 1 1:35 Naidu 2001 KB67 0755-0930 0055-0230 Jun 1 0355-0530 Jun 1 35 5 1:35 Naidu Times above all assume we can begin to transmit 30 minutes into precal. Arecibo Schedule: UT PDT Date Target TX Window TX Window May 25 1999 KW4 0717-0920 0017-0220 May 25 May 25 2001 KB67 1241-1437 0541-0737 May 25 May 26 1999 KW4 0636-0903 2336-0203 May 25-26 May 26 2001 KB67 1153-1417 0453-0717 May 26 May 27 1999 KW4 0559-0838 2259-0138 May 26-27 May 27 2001 KB67 1059-1337 0359-0637 May 27 May 28 1999 KW4 0524-0807 2224-0107 May 27-28 May 28 2001 KB67 1000-1233 0300-0533 May 28 May 29 1999 KW4 0453-0731 2153-0031 May 28-29 May 29 2001 KB67 0858-1105 0158-0405 May 29 May 30 1999 KW4 0425-0653 2125-2353 May 29 May 30 2001 KB67 0757-0931 0057-0231 May 30 May 31 1999 KW4 0400-0614 2100-2314 May 30 May 31 2001 KB67 0654-0818 2354-0118 May 30-31 Jun 1 1999 KW4 0338-0536 2038-2236 May 31 Jun 1 2001 KB67 0554-0731 2254-0031 May 31-Jun 1
Uncertainties
1999 KW4 JPL/Horizons solution 214; # obs: 2829 (1998-2017) 2018 May 11 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_S_3sig DOP_X_3sig RT_delay_3sig 2018-May-20 00:00 *m 324.11395 -12.58877 0.11654927477230 0.241 0.20 0.72 0.000174 2018-May-21 00:00 *m 320.83056 -10.13370 0.10839538389058 0.233 0.19 0.71 0.000181 2018-May-22 00:00 *m 317.08597 -7.25968 0.10084570299023 0.218 0.18 0.66 0.000188 2018-May-23 00:00 *m 312.81456 -3.91400 0.09405766820244 0.197 0.15 0.55 0.000194 2018-May-24 00:00 *m 307.95529 -0.06794 0.08821831899417 0.172 0.10 0.36 0.000198 2018-May-25 00:00 *m 302.46403 4.25705 0.08353689038238 0.151 0.05 0.17 0.000200 2018-May-26 00:00 *m 296.33177 8.95970 0.08022517618030 0.154 0.12 0.42 0.000198 Scheduled 2018-May-27 00:00 * 289.60628 13.84236 0.07846418922759 0.189 0.24 0.86 0.000192 2018-May-28 00:00 * 282.40960 18.63008 0.07836432100571 0.241 0.35 1.29 0.000181 2018-May-29 00:00 * 274.93932 23.03320 0.07993589259941 0.292 0.45 1.62 0.000166 2018-May-30 00:00 * 267.44434 26.82684 0.08308654684408 0.329 0.50 1.81 0.000149 2018-May-31 00:00 * 260.17909 29.90187 0.08764703232492 0.350 0.51 1.85 0.000131 2018-Jun-01 00:00 * 253.35522 32.26399 0.09341054269234 0.355 0.49 1.80 0.000112 Scheduled 2018-Jun-02 00:00 * 247.11177 33.99626 0.10016783375534 0.350 0.46 1.68 0.000095 2018-Jun-03 00:00 * 241.51143 35.21465 0.10772916398537 0.338 0.42 1.53 0.000079 2018-Jun-04 00:00 * 236.55561 36.03583 0.11593345836377 0.322 0.38 1.37 0.000065 2018-Jun-05 00:00 * 232.20608 36.56081 0.12464912504965 0.304 0.34 1.23 0.000052 2001 KB67 JPL/Horizons solution 38, # obs: 228 (2001-2017): 2018 May 14 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_S_3sig DOP_X_3sig RT_delay_3sig 2018-May-20 00:00 *m 39.59852 -7.80781 0.07468821515660 5.922 2.51 9.12 0.000315 2018-May-21 00:00 *m 37.76083 -6.64145 0.06735177622276 6.527 2.84 10.30 0.000293 2018-May-22 00:00 *m 35.50576 -5.16187 0.06015689153707 7.246 3.27 11.89 0.000306 2018-May-23 00:00 *m 32.67917 -3.25463 0.05314894822608 8.103 3.87 14.05 0.000366 2018-May-24 00:00 *m 29.04762 -0.75070 0.04640047502168 9.112 4.67 16.97 0.000476 2018-May-25 00:00 *m 24.24877 2.59644 0.04003052562590 10.254 5.72 20.80 0.000636 2018-May-26 00:00 *m 17.71436 7.12005 0.03423857244580 11.400 6.96 25.30 0.000850 Scheduled 2018-May-27 00:00 * 8.58305 13.15377 0.02935650742368 12.180 7.92 28.80 0.001112 Scheduled 2018-May-28 00:00 * 355.75818 20.62494 0.02589287029598 11.948 7.37 26.80 0.001390 2018-May-29 00:00 * 338.65458 28.22244 0.02444875952482 10.577 4.22 15.35 0.001597 Scheduled 2018-May-30 00:00 * 318.97861 33.50226 0.02536506446662 9.458 2.06 7.49 0.001648 2018-May-31 00:00 * 300.74036 35.34413 0.02841082814299 9.170 3.97 14.42 0.001557 2018-Jun-01 00:00 * 286.58193 34.86151 0.03300042145990 8.840 4.52 16.43 0.001404 Scheduled 2018-Jun-02 00:00 * 276.42783 33.47061 0.03858732251805 8.230 4.18 15.20 0.001247 2018-Jun-03 00:00 * 269.20563 31.92001 0.04480163243206 7.502 3.62 13.16 0.001107 2018-Jun-04 00:00 * 263.95740 30.47975 0.05141887359229 6.785 3.09 11.23 0.000988 2018-Jun-05 00:00 * 260.03131 29.21570 0.05830510189027 6.135 2.65 9.63 0.000888 2018-Jun-06 00:00 * 257.01032 28.12340 0.06537886403342 5.564 2.30 8.36 0.000803 2018-Jun-07 00:00 * 254.62728 27.17891 0.07258911425227 5.069 2.03 7.36 0.000731 2018-Jun-08 00:00 * 252.70727 26.35621 0.07990284525850 4.641 1.81 6.57 0.000669 2018-Jun-09 00:00 * 251.13264 25.63234 0.08729808468055 4.269 1.64 5.94 0.000616 2018-Jun-10 00:00 * 249.82206 24.98840 0.09475981865941 3.945 1.50 5.44 0.000571 Ephemeris with Visual Magnitudes, Distances, Solar Elongations, Lunar Elongations, and Lunar Phases 1999 KW4 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta APmag S-brt S-O-T /r T-O-M/Illu% 2018-May-15 00:00 335.60568 -20.49585 0.16267534870676 15.61 4.90 84.2944 /L 77.0/ 0.5 2018-May-16 00:00 333.81124 -19.34109 0.15297160822777 15.43 4.88 86.3774 /L 92.6/ 0.5 2018-May-17 00:00 331.80541 -18.01099 0.14344537165410 15.24 4.85 88.6254 /L 108.6/ 3.3 2018-May-18 00:00 329.55163 -16.47043 0.13414780902125 15.03 4.83 91.0667 /L 125.0/ 8.8 2018-May-19 00:00 327.00686 -14.67694 0.12514323147378 14.81 4.79 93.7325 /L 141.6/ 16.6 2018-May-20 00:00 324.12098 -12.58039 0.11651276393293 14.59 4.76 96.6559 /L 158.2/ 26.3 2018-May-21 00:00 320.83675 -10.12396 0.10835871099319 14.35 4.71 99.8668 /L 172.4/ 37.1 2018-May-22 00:00 317.09100 -7.24824 0.10080917815907 14.10 4.66 103.3840 /L 164.4/ 48.3 2018-May-23 00:00 312.81801 -3.90049 0.09402173112145 13.85 4.61 107.1999 /L 147.5/ 59.5 2018-May-24 00:00 307.95666 -0.05200 0.08818356681457 13.60 4.55 111.2560 /L 129.8/ 69.9 2018-May-25 00:00 302.46277 4.27564 0.08350408467116 13.38 4.49 115.4120 /L 111.9/ 79.2 2018-May-26 00:00 296.32735 8.98086 0.08019520376885 13.19 4.42 119.4204 /L 94.2/ 87.0 2018-May-27 00:00 289.59827 13.86558 0.07843795799172 13.05 4.37 122.9357 /L 77.4/ 93.1 2018-May-28 00:00 282.39782 18.65442 0.07834260476347 12.99 4.33 125.5890 /L 62.7/ 97.3 2018-May-29 00:00 274.92398 23.05746 0.07991918513288 12.99 4.30 127.1207 /L 51.9/ 99.5 2018-May-30 00:00 267.42602 26.84990 0.08307499570657 13.07 4.30 127.4890 /L 47.5/ 99.7 2018-May-31 00:00 260.15864 29.92291 0.08764047511712 13.20 4.31 126.8663 /L 50.1/ 98.0 2018-Jun-01 00:00 253.33359 32.28261 0.09340860778299 13.37 4.34 125.5355 /L 57.9/ 94.6 2018-Jun-02 00:00 247.08981 34.01240 0.10017004905663 13.57 4.37 123.7763 /T 68.4/ 89.6 2018-Jun-03 00:00 241.48980 35.22848 0.10773503902243 13.77 4.40 121.8051 /T 79.9/ 83.2 2018-Jun-04 00:00 236.53476 36.04763 0.11594253244082 13.98 4.43 119.7659 /T 91.5/ 75.6 2018-Jun-05 00:00 232.18628 36.57088 0.12466098892125 14.19 4.47 117.7438 /T 102.9/ 67.0 2018-Jun-06 00:00 228.38561 36.87863 0.13378511633609 14.38 4.49 115.7848 /T 113.5/ 57.7 2018-Jun-07 00:00 225.06735 37.03181 0.14323132653953 14.57 4.52 113.9100 /T 123.0/ 47.9 2018-Jun-08 00:00 222.16753 37.07530 0.15293328688694 14.75 4.55 112.1261 /T 130.6/ 37.9 2018-Jun-09 00:00 219.62768 37.04160 0.16283810251320 14.92 4.57 110.4324 /T 135.4/ 28.1 2018-Jun-10 00:00 217.39637 36.95408 0.17290323950629 15.09 4.59 108.8239 /T 136.2/ 19.0 2018-Jun-11 00:00 215.42938 36.82944 0.18309412353639 15.24 4.61 107.2941 /T 132.5/ 11.1 2018-Jun-12 00:00 213.68914 36.67968 0.19338229675359 15.39 4.62 105.8358 /T 125.1/ 4.9 2018-Jun-13 00:00 212.14393 36.51336 0.20374401717345 15.52 4.64 104.4420 /T 115.2/ 1.1 2018-Jun-14 00:00 210.76704 36.33666 0.21415920379636 15.65 4.65 103.1061 /T 103.8/ 0.1 2018-Jun-15 00:00 209.53594 36.15403 0.22461065058467 15.78 4.67 101.8221 /T 91.7/ 2.1 2018-Jun-16 00:00 208.43156 35.96868 0.23508344660925 15.90 4.68 100.5844 /T 79.3/ 7.0 2018-Jun-17 00:00 207.43777 35.78293 0.24556454844865 16.01 4.69 99.3882 /T 67.3/ 14.4 2018-Jun-18 00:00 206.54080 35.59844 0.25604245849237 16.11 4.70 98.2291 /T 56.3/ 23.7 2018-Jun-19 00:00 205.72892 35.41637 0.26650697280141 16.22 4.70 97.1032 /T 46.8/ 34.1 2018-Jun-20 00:00 204.99203 35.23755 0.27694897429601 16.31 4.71 96.0070 /T 40.0/ 45.1 2018-Jun-21 00:00 204.32149 35.06251 0.28736025798238 16.40 4.72 94.9375 /T 36.9/ 56.1 2018-Jun-22 00:00 203.70980 34.89162 0.29773338203046 16.49 4.72 93.8920 /T 38.1/ 66.4 2018-Jun-23 00:00 203.15048 34.72507 0.30806154161484 16.58 4.73 92.8681 /T 43.1/ 75.8 2018-Jun-24 00:00 202.63787 34.56298 0.31833846305277 16.66 4.73 91.8635 /T 50.4/ 83.9 2018-Jun-25 00:00 202.16704 34.40538 0.32855831552703 16.73 4.73 90.8766 /T 59.2/ 90.5 2018-Jun-26 00:00 201.73367 34.25225 0.33871563749424 16.81 4.74 89.9054 /T 68.7/ 95.4 2018-Jun-27 00:00 201.33393 34.10353 0.34880527503318 16.88 4.74 88.9486 /T 78.5/ 98.6 2018-Jun-28 00:00 200.96446 33.95914 0.35882232982588 16.95 4.74 88.0047 /T 88.5/ 99.9 2018-Jun-29 00:00 200.62225 33.81898 0.36876211501644 17.01 4.74 87.0726 /T 98.5/ 99.4 2018-Jun-30 00:00 200.30465 33.68295 0.37862011769703 17.07 4.74 86.1511 /T 108.4/ 97.1 2001 KB67 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta APmag S-O-T /r T-O-M/Illu% 2018-May-20 00:00 39.62512 -7.78856 0.07469021594174 22. 32.4200 /L 86.0/ 26.3 2018-May-21 00:00 37.79045 -6.62032 0.06735260041236 21. 33.1642 /L 101.1/ 37.1 2018-May-22 00:00 35.53898 -5.13840 0.06015640494613 21. 34.1703 /L 116.5/ 48.3 2018-May-23 00:00 32.71673 -3.22820 0.05314697356883 21. 35.5850 /L 132.3/ 59.5 2018-May-24 00:00 29.09038 -0.72040 0.04639677755223 20. 37.6526 /L 148.6/ 69.9 2018-May-25 00:00 24.29765 2.63203 0.04002480126866 19. 40.7783 /L 165.9/ 79.2 2018-May-26 00:00 17.76990 7.16320 0.03423046047936 18. 45.6043 /L 174.3/ 87.0 2018-May-27 00:00 8.64408 13.20797 0.02934569619091 17. 53.0169 /L 153.8/ 93.1 2018-May-28 00:00 355.81860 20.69428 0.02587942666646 16.35 63.7961 /L 130.3/ 97.3 2018-May-29 00:00 338.69966 28.30691 0.02443362966473 15.44 77.5424 /L 105.2/ 99.5 2018-May-30 00:00 318.99250 33.59150 0.02534997118503 14.90 91.8415 /L 82.0/ 99.7 2018-May-31 00:00 300.72429 35.42447 0.02839720808485 14.72 103.9106 /L 64.9/ 98.0 2018-Jun-01 00:00 286.54976 34.92760 0.03298883595025 14.77 112.7634 /L 56.2/ 94.6 2018-Jun-02 00:00 276.39052 33.52380 0.03857775921294 14.93 118.8681 /L 55.7/ 89.6 2018-Jun-03 00:00 269.16841 31.96326 0.04479388471827 15.14 123.0175 /L 60.7/ 83.2 2018-Jun-04 00:00 263.92221 30.51561 0.05141271523092 15.37 125.8510 /L 68.9/ 75.6 2018-Jun-05 00:00 259.99870 29.24603 0.05830033854328 15.59 127.8014 /L 78.5/ 67.0 2018-Jun-06 00:00 256.98028 28.14951 0.06537534003011 15.81 129.1489 /L 88.7/ 57.7 2018-Jun-07 00:00 254.59960 27.20173 0.07258670708677 16.01 130.0748 /T 99.2/ 47.9 2018-Jun-08 00:00 252.68172 26.37641 0.07990145830534 16.21 130.6981 /T 109.6/ 37.9 2018-Jun-09 00:00 251.10898 25.65040 0.08729764091529 16.39 131.0991 /T 119.5/ 28.1 2018-Jun-10 00:00 249.80007 25.00471 0.09476025581329 16.57 131.3331 /T 128.6/ 19.0 2018-Jun-11 00:00 248.69733 24.42409 0.10227880555516 16.73 131.4392 /T 135.7/ 11.1 2018-Jun-12 00:00 247.75893 23.89647 0.10984576655281 16.89 131.4453 /T 139.6/ 4.9 2018-Jun-13 00:00 246.95385 23.41225 0.11745560526884 17.04 131.3724 /T 138.7/ 1.1 2018-Jun-14 00:00 246.25866 22.96382 0.12510412864575 17.19 131.2359 /T 133.3/ 0.1 2018-Jun-15 00:00 245.65536 22.54509 0.13278805179359 17.32 131.0476 /T 124.5/ 2.1 2018-Jun-16 00:00 245.12984 22.15120 0.14050471525594 17.46 130.8167 /T 113.9/ 7.0 2018-Jun-17 00:00 244.67091 21.77822 0.14825190777522 17.58 130.5503 /T 102.4/ 14.4 2018-Jun-18 00:00 244.26954 21.42296 0.15602776050833 17.70 130.2542 /T 90.6/ 23.7 2018-Jun-19 00:00 243.91838 21.08279 0.16383068454319 17.82 129.9328 /T 79.0/ 34.1 2018-Jun-20 00:00 243.61136 20.75557 0.17165933051783 17.93 129.5899 /T 67.8/ 45.1
Setups
1999 KW4: The equatorial diameter, rapid rotation period, and a nearly equatorial view indicate that the bandwidths at Goldstone will be about 55 Hz. The SNRs are going to be weak, so in order to see an echo relatively quickly we're going to use coarse resolution setups. We don't know what to expect for the bandwidth of 2001 KB67 due its unknown rotation period and diameter, but it's likely we'll start with the same configuration below that's designed for 1999 KW4. CW setup --------------------------------------------------------------------------- TX polarization RCP RCV polarization LCP & RCP Frequency hops: no hopping Bandwidth: 5000 Hz TXoffset +500 Hz FFT for PFS files: 1000 for 5.0 Hz resolution Ranging setups: --------------------------------------------------------------------------- 10-usec baud 10 usec code 127 PRP 1270 usec FFT 64 ncoh 1 bandwidth 787 Hz resolution 12.3 Hz TXOFF +100 Hz (echo in column 32 + 8 = 40) --------------------------------------------------------------------------- 11-usec baud 11 usec code 127 PRP 1397 usec FFT 64 ncoh 1 bandwidth 716 Hz resolution 11.2 Hz TXOFF +100 Hz (echo in column 32 + 9 = 41) ------------------------------------------------------------------------- 1-usec baud 1 usec code 255 ncoh 2 bandwidth 1960.8 Hz FFT 128 resolution 15.3 Hz TXOFF +200 Hz ---------------------------------------------------------------------
Instructions
NOTE: Data should be moved to the appropriate subdirectories in aardvark:/export/data0/1999kw4/raw/ aardvark:/export/data0/2001kb67/raw/
POINTING:
OSOD and predicts will be on aardvark: 1999 KW4 /export/data3/osod/ops/a66391/EPH.OUT.s214 /export/data3/osod/ops/a66391/PRDX.OUT.14v-14-14.s214 /export/data3/osod/ops/a66391/PRDX.OUT.14f-14-14.s214 /export/data3/osod/ops/a66391/PUNCH.OUT.14v-14-14.s214 /export/data3/osod/ops/a66391/PUNCH.OUT.14f-14-14.s214 2001 KB67 /export/data3/osod/ops/a68347/EPH.OUT.s38 /export/data3/osod/ops/a68347/PRDX.OUT.14v-14-14.s38 /export/data3/osod/ops/a68347/PRDX.OUT.14f-14-14.s38 /export/data3/osod/ops/a68347/PUNCH.OUT.14v-14-14.s38 /export/data3/osod/ops/a68347/PUNCH.OUT.14f-14-14.s38 1999 KW4 Pointing: Date (UTC) DOY hhmmss RA Dec LHA Dec RTT OSOD 2018 MAY 26 146 130000 292.7376 11.6078 12.9 4.4 78.9 214 2018 MAY 26 146 140000 292.4501 11.8112 10.0 4.4 78.8 2018 MAY 26 146 150000 292.1629 12.0143 8.3 4.4 78.7 2018 MAY 26 146 160000 291.8764 12.2172 7.5 4.5 78.7 Transmit offsets are in millidegrees. 2001 KB67 Pointing: Date (UTC) DOY hhmmss RA Dec LHA Dec RTT OSOD 2018 MAY 26 146 130000 13.2676 +10.1991 0.3 2.3 31.4 38 2018 MAY 26 146 140000 12.8688 +10.4573 1.1 2.2 31.1 2018 MAY 26 146 150000 12.4615 +10.7177 3.2 2.3 30.9 2018 MAY 26 146 160000 12.0467 +10.9803 7.4 2.3 30.7 2018 MAY 26 146 170000 11.6254 +11.2448 9.4 2.3 30.6 2018 MAY 26 146 180000 11.1989 +11.5113 7.5 2.2 30.4 2018 MAY 26 146 190000 10.7683 +11.7796 5.7 2.3 30.2 2018 MAY 26 146 200000 10.3347 +12.0499 4.6 2.2 30.0 Transmit offsets are given in millidegrees.
1999 KW4 PRDX.OUT.14f-14-14.214 TRANSMITTER: STATION #14, RECEIVER: STATION #14 RECEIVER U.T. RANGE DOPPLER AZI DEC RA EL 2018 MAY 26 13:40 78.8118242070 149545.420 246.5321 11.7434 292.5459 47.0827 2018 MAY 26 13:50 78.8014069995 147696.903 248.8725 11.7773 292.4980 45.1782 2018 MAY 26 14:00 78.7911183655 145876.909 251.0840 11.8112 292.4501 43.2434 2018 MAY 26 14:10 78.7809562660 144086.821 253.1818 11.8450 292.4022 41.2827 2018 MAY 26 14:20 78.7709185529 142327.964 255.1795 11.8789 292.3543 39.3000 2018 MAY 26 14:30 78.7610029884 140601.599 257.0894 11.9128 292.3064 37.2989 2018 MAY 26 14:40 78.7512072568 138908.919 258.9223 11.9466 292.2586 35.2823 2018 MAY 26 14:50 78.7415289619 137251.051 260.6880 11.9805 292.2107 33.2529 2018 MAY 26 15:00 78.7319656191 135629.050 262.3950 12.0143 292.1629 31.2130 2018 MAY 26 15:10 78.7225146811 134043.898 264.0513 12.0481 292.1151 29.1649 2018 MAY 26 15:20 78.7131735335 132496.503 265.6639 12.0820 292.0673 27.1106 2018 MAY 26 15:30 78.7039395039 130987.696 267.2392 12.1158 292.0195 25.0517 2018 MAY 26 15:40 78.6948098564 129518.231 268.7832 12.1496 291.9718 22.9901 2018 MAY 26 15:50 78.6857818087 128088.782 270.3012 12.1834 291.9241 20.9273 2018 MAY 26 16:00 78.6768525352 126699.942 271.7983 12.2172 291.8764 18.8648 2001 KB67 PRDX.OUT.14f-14-14.38 TRANSMITTER: STATION #14, RECEIVER: STATION #14 RECEIVER U.T. RANGE DOPPLER AZI DEC RA EL 2018 MAY 26 13:40 31.2186117624 491786.535 113.8930 10.3710 13.0027 45.3141 2018 MAY 26 13:50 31.1841951889 490227.816 116.2678 10.4141 12.9359 47.2421 2018 MAY 26 14:00 31.1498889260 488639.344 118.7963 10.4573 12.8688 49.1314 2018 MAY 26 14:10 31.1156950050 487022.704 121.4983 10.5005 12.8015 50.9755 2018 MAY 26 14:20 31.0816153351 485379.530 124.3956 10.5439 12.7340 52.7672 2018 MAY 26 14:30 31.0476517219 483711.507 127.5120 10.5872 12.6662 54.4978 2018 MAY 26 14:40 31.0138058500 482020.365 130.8727 10.6307 12.5982 56.1575 2018 MAY 26 14:50 30.9800792749 480307.878 134.5034 10.6742 12.5300 57.7347 2018 MAY 26 15:00 30.9464734237 478575.856 138.4294 10.7177 12.4615 59.2162 2018 MAY 26 15:10 30.9129896100 476826.147 142.6730 10.7614 12.3929 60.5872 2018 MAY 26 15:20 30.8796290051 475060.628 147.2507 10.8050 12.3240 61.8312 2018 MAY 26 15:30 30.8463926500 473281.205 152.1693 10.8488 12.2550 62.9301 2018 MAY 26 15:40 30.8132814523 471489.805 157.4217 10.8926 12.1857 63.8656 2018 MAY 26 15:50 30.7802961827 469688.378 162.9817 10.9364 12.1163 64.6193 2018 MAY 26 16:00 30.7474374725 467878.888 168.8019 10.9803 12.0467 65.1745 2018 MAY 26 16:10 30.7147058242 466063.310 174.8126 11.0243 11.9769 65.5176 2018 MAY 26 16:20 30.6821015924 464243.626 180.9259 11.0683 11.9069 65.6398 2018 MAY 26 16:30 30.6496249889 462421.824 187.0432 11.1123 11.8367 65.5378 2018 MAY 26 16:40 30.6172761019 460599.888 193.0656 11.1565 11.7664 65.2145 2018 MAY 26 16:50 30.5850548643 458779.800 198.9041 11.2006 11.6960 64.6787 2018 MAY 26 17:00 30.5529610843 456963.531 204.4877 11.2448 11.6254 63.9439 2018 MAY 26 17:10 30.5209944226 455153.042 209.7675 11.2891 11.5546 63.0266 2018 MAY 26 17:20 30.4891544047 453350.274 214.7160 11.3334 11.4837 61.9452 2018 MAY 26 17:30 30.4574404193 451557.148 219.3248 11.3778 11.4127 60.7183 2018 MAY 26 17:40 30.4258517266 449775.561 223.6000 11.4223 11.3415 59.3640 2018 MAY 26 17:50 30.3943874569 448007.380 227.5577 11.4667 11.2703 57.8990 2018 MAY 26 18:00 30.3630465959 446254.441 231.2198 11.5113 11.1989 56.3383 2018 MAY 26 18:10 30.3318280213 444518.541 234.6115 11.5559 11.1273 54.6954 2018 MAY 26 18:20 30.3007304698 442801.440 237.7586 11.6005 11.0557 52.9818 2018 MAY 26 18:30 30.2697525702 441104.851 240.6865 11.6452 10.9840 51.2077 2018 MAY 26 18:40 30.2388928268 439430.443 243.4189 11.6900 10.9122 49.3817 2018 MAY 26 18:50 30.2081496193 437779.831 245.9780 11.7348 10.8403 47.5114 2018 MAY 26 19:00 30.1775212251 436154.579 248.3836 11.7796 10.7683 45.6032 2018 MAY 26 19:10 30.1470058208 434556.192 250.6539 11.8245 10.6962 43.6627
GOLDSTONE MASTERLOG
============================================================================== Receive TX Setup hops dwell code ncoh FFT runs start -stop OSOD offset Poln Notes ------------------------------------------------------------------------------
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/1999KW4/1999KW4_planning.2018.html
Asteroid Radar Astronomy