2005 YU55 Goldstone Radar Observations Planning
Asteroid 2005 YU55 was discovered by Spacewatch on December 28, 2005. It will approach Earth within 0.85 lunar distances (0.00217 AU) on November 8, 2011, when it will be an extraordinarily strong radar target. 2005 YU55 has an absolute magnitude of 21.9, and imaging at Arecibo in 2010 revealed that the asteroid has a rounded shape with a diameter of about 400 meters. The 2011 approach is the closest known by an asteroid with an absolute magnitude this bright since 2010 XC15 (H = 21.4) approached within 0.5 lunar distances in 1976, and until 2028, when 2001 WN5 (H = 18.2) will approach within 0.65 lunar distances, and as such, it represents an invaluable scientific opportunity. Our finest range resolution at Goldstone is 3.75 m, which should reveal a wealth of detail about the asteroid's surface features, shape, dimensions, and other physical properties. The signal-to-noise ratios (SNRs) will be more than 1 million per round-trip time for Goldstone observations on November 8-9. As a result of the very high SNRs, we are planning to utilize the highest resolution available from the chirp system, which should place thousands of pixels on the object and reveal considerable surface detail. The radar resolution will be orders of magnitude more detailed than is possible with any ground- or space-based optical telescope and is comparable to what can be obtained by a spacecraft flyby mission. Due to the outstanding scientific potential presented by this event, we are planning an extensive campaign of monostatic and bistatic radar observations with Goldstone DSS-14, DSS-13, Arecibo, the Very Long Baseline Array, and the Green Bank Telescope. The very short round-trip light travel times (only 2.2 seconds) on dates surrounding the closest approach require that some observations will be bistatic. On November 11 we will also conduct a brief intercontinental bistatic experiment in which DSS-14 will transmit and our colleauges Stelio Montebugnoli, Guiseppe Pupillo, and Emma Salerno will attempt to receive echoes with the 32 meter antenna at Medicina, Italy (near Bologna). 2005 YU55 is observable at useful SNRs at Goldstone for more than three weeks starting in late October. It will approach from the south and Goldstone can observe it for at least one week before it enters Arecibo's declination window on November 8. The pointing uncertainties will expand considerably during the extremely close approach, so we have scheduled multiple Goldstone tracks prior to November 7 so we can track it and improve the orbit while the uncertainties are still small. This will also extend the sky motion substantially relative to what will be possible after closest approach, and will greatly facilitate estimation of the asteroid's pole direction and 3D shape. 2005 YU55 is a slow rotator, so in order to see as much of its surface as possible and to take full advantage of this opportunity, we have scheduled several Goldstone tracks that are at least five hours long. Michael Busch (UCLA) is planning to observe this object with transmissions from Arecibo and reception of radar speckles at the Pie Town, Los Alamos, Kitt Peak, and Fort Davis stations of the Very Long Baseline Array. Those observations could provide the asteroid's sense of rotation and pole direction independently of delay-Doppler radar imaging (this is a new technique). Arecibo observations in April, 2010 improved the orbit substantially and removed this object from the NASA Near-Earth Object Program's "Risk Page" of potential impactors. This is described briefly in an article that appeared on Asteroid Watch, in another short article by Mike Nolan on the website at Arecibo, and in a third article by Emily Lakdawalla at the Planetary Society. The Arecibo observations in 2010 also revealed that 2005 YU55 has a rotation period of approximately 18 hours (assuming that the subradar latitude was close to equatorial); that its circular polarization ratio is about 0.4, indicating a a moderately rough near-surface compared with other near-Earth asteroids; that its surface is darker than charcoal at optical wavelengths; and that it has a relatively bright radar reflectivity of ~20%. The closest approach occurs just before the date boundary between Nov. 8-9, when 2005 YU55 will move up to 8.6 degrees during the hour between Nov. 8 23:00 - Nov. 9 00:00 UTC. To place that in perspective, the angular width of the Moon is about 0.5 degrees, so YU55 will move 17 lunar diameters per hour or about 0.3 lunar diameters per minute. Motion this rapid will easily be observable in small telescopes with apertures of roughly 15 cm and larger (at this time the asteroid should reach 11th or 12 magnitude). 2005 YU55 will approach Earth from the direction of the Sun, so it won't be visible at night until November 8. Afterward, it will move directly away from Earth, approximately 180 degrees from its approach trajectory. Radar observations provide their own illumination, so both Goldstone and Arecibo will be able to observe the asteroid during the day prior to Nov. 9. 2005 YU55 will also be the subject of intensive observations with spectroscopy, photometry, and infrared radiometry beginning on the night of November 8/9. The November, 2011 issue of Sky and Telescope magazine features a full-page article on p. 53 that describes the 2011 flyby and provides finder charts for locating the asteroid. Here is a link to an animation prepared by Jon Giorgini (JPL) that shows the motion of 2005 YU55 in the vicinity of the Earth and Moon during the flyby: Flyby Animation 2005 YU55 will also encounter the Moon 8 hours after its flyby with Earth, and somewhat closer at 0.62 Earth-Moon distances. This asteroid also closely approaches Venus, most notably within 0.0019 AU (0.74 lunar distances) in 2029. The uncertainties will increase substantially afterward, so that by the time of the next potential encounter with Earth in 2041, the asteroid's minimum distance could be anywhere between 0.002 AU and 0.3 AU. Radar astrometry obtained in Nov. 2011 should clarify the Earth encounter situation in 2041 and beyond. The 2011 encounter is the closest to Earth for at least the last 200 years. Due to its size and proximity to Earth, the Minor Planet Center has designated 2005 YU55 as a "Potentially Hazardous Asteroid." Despite this designation, this object cannot hit Earth during the entire interval over which its motion can be computed reliably. Note to optical observers: We intend to provide radar astrometry shortly after the November 4 Goldstone track through the JPL/Horizons online ephemeris system. This should shrink the uncertainies sufficiently for other observatories to track this object once it enters the night sky on November 8.
Orbital and Physical Characteristics orbit type Apollo semimajor axis 1.143 AU eccentricity 0.43 inclination 0.5 deg perihelion distance 0.652 AU aphelion distance 1.633 AU absolute magnitude (H) 21.9 diameter ~0.4 km rotation period ~18 h (based on Arecibo observations in April 2010) pole direction unknown lightcurve amplitude relatively small spectral class C (M. D. Hicks et al., ATeL 2571, 2010; R. P. Binzel, pers. comm.)
Close approaches by 2005 YU55 using radar astrometry obtained through 2011 Nov. 9: JPL/Horizons solution #96, #obs: 782 (2005-2011), radar = ( 7 delay,10 Dop.) Date (CT) Body CA Dist MinDist MaxDist Vrel TCA3Sg Nsigs P_i/p ---------------------- ----- ------- ------- ------- ------ ------ ------ ------- A.D. 2011 Nov 08.97846 Earth .002172 .002172 .002172 13.716 0.00 3.65E5 .000000 A.D. 2011 Nov 09.30173 Moon .001601 .001601 .001601 13.509 0.00 2.61E5 .000000 A.D. 2027 Oct 20.68395 Venus .087901 .087852 .087951 15.382 4.29 5108.9 .000000 A.D. 2029 Jan 19.86344 Venus .002316 .002286 .002346 11.115 8.43 2.57E5 .000000 A.D. 2030 Jun 01.09063 Venus .056782 .056613 .056953 9.239 139.56 7.63E5 .000000 A.D. 2045 Apr 25.12190 Earth .069526 .066575 .072504 11.609 222.61 53886. .000000 A.D. 2055 Jul 01.52540 Venus .029421 .027346 .031486 12.527 270.79 5.91E5 .000000 A.D. 2056 Nov 01.91886 Venus .071693 .071608 .071779 9.162 324.21 1.97E6 .000000 A.D. 2058 Feb 23.81760 Venus .099715 .099072 .100358 15.515 51.33 4.31E5 .000000 A.D. 2075 Nov 08.10588 Moon .002115 .001496 .017423 13.805 1371.4 21250. .000000 A.D. 2075 Nov 08.40224 Earth .001892 .001258 .017673 13.809 1129.9 17405. .000000 A.D. 2080 Nov 03.29458 Venus .062028 .040183 .318846 8.978 3.60E5 29090. .000000 A.D. 2085 May 18.67768 Mars .036596 .034912 .459031 5.415 2.66E5 8888.4 .000000 A.D. 2088 Dec 02.78706 Mars .098451 .034811 1.003056 7.026 45490. 10372. .000000 A.D. 2096 Mar 09.95104 Venus .066424 .059586 .643072 9.022 1.18E6 2.20E6 .000000 A.D. 2097 Apr 22.40402 Earth .041401 .004297 1.864916 14.880 1.54E5 7916.6 .000000 NOTE: post-epoch CA list was truncated due to Earth TCA3Sg exceeding the set limit. The approach in 2075 _may_ be closer than the one in 2011: The nominal 2075 close approach is at only 0.74 Earth-Moon distances.
Close approaches by 2005 YU55 using radar astrometry obtained through 2011 Nov. 7: Date (CT) Body CA Dist MinDist MaxDist Vrel TCA3Sg Nsigs P_i/p ---------------------- ----- ------- ------- ------- ------ ------ ------ ------- A.D. 2011 Nov 08.97846 Earth .002172 .002172 .002172 13.716 0.00 7.15E5 .000000 A.D. 2011 Nov 09.30173 Moon .001601 .001601 .001601 13.509 0.00 5.26E5 .000000 A.D. 2027 Oct 20.68352 Venus .087908 .087858 .087957 15.382 4.27 6076.4 .000000 A.D. 2029 Jan 19.86265 Venus .002312 .002282 .002341 11.116 8.39 2.63E5 .000000 A.D. 2030 Jun 01.07755 Venus .056805 .056630 .056982 9.238 144.09 8.06E5 .000000 A.D. 2045 Apr 25.09980 Earth .069118 .066061 .072204 11.621 230.60 56809. .000000 A.D. 2055 Jul 01.49947 Venus .029704 .027577 .031821 12.540 276.73 5.71E5 .000000 A.D. 2056 Nov 01.89323 Venus .071705 .071615 .071796 9.162 339.48 2.08E6 .000000 A.D. 2058 Feb 23.82277 Venus .099801 .099171 .100431 15.520 49.94 4.61E5 .000000 A.D. 2075 Nov 08.50994 Earth .003857 .001258 .020109 13.824 1141.2 18587. .000000 A.D. 2080 Sep 17.87259 Venus .075000 .001369 1.367210 14.609 1.42E5 36303. .000000 A.D. 2082 Feb 07.15931 Venus .045663 .037569 1.218542 9.561 4.71E5 3.14E5 .000000 A.D. 2089 Feb 28.44932 Mars .044200 .037537 1.099940 5.914 3.48E5 1.20E5 .000000 A.D. 2089 Nov 05.25991 Earth .052266 .001624 2.806791 12.096 2.24E5 25967. .000000 NOTE: post-epoch CA list was truncated due to Earth TCA3Sg exceeding the set limit. Close Approaches by 2005 YU55 During 1782-2041 Using Astrometry Obtained Before the 2011 Radar Observations
Last update: 2011 Dec 14
M.P.E.C. 2005-Y47 Issued 2005 Dec. 29, 12:43 UT The Minor Planet Electronic Circulars contain information on unusual minor planets and routine data on comets. They are published on behalf of Commission 20 of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A. Supported in part by the Brinson Foundation Supported in part by the TABASGO Foundation Prepared using the Tamkin Foundation Computer Network MPC@CFA.HARVARD.EDU URL http://cfa-www.harvard.edu/iau/mpc.html ISSN 1523-6714 2005 YU55 Observations: K05Y55U*FC2005 12 28.25072 06 53 24.60 +24 10 07.5 21.4 V EY047691 K05Y55U FC2005 12 28.26806 06 53 21.19 +24 10 11.7 21.4 V EY047691 K05Y55U FC2005 12 28.28596 06 53 17.67 +24 10 16.8 21.4 V EY047691 K05Y55U C2005 12 28.48219 06 52 38.22 +24 11 02.9 22.1 V EY047291 K05Y55U C2005 12 28.48684 06 52 37.26 +24 11 04.2 22.1 V EY047291 K05Y55U HC2005 12 28.49159 06 52 36.38 +24 11 03.1 EY047291 K05Y55U C2005 12 29.17693 06 50 25.10 +24 13 51.3 EY047734 K05Y55U C2005 12 29.18029 06 50 24.62 +24 13 52.0 22.6 V EY047291 K05Y55U C2005 12 29.18483 06 50 23.78 +24 13 53.4 21.7 V EY047291 K05Y55U C2005 12 29.18916 06 50 22.89 +24 13 54.7 21.6 V EY047291 K05Y55U C2005 12 29.19906 06 50 20.72 +24 13 54.7 EY047734 K05Y55U C2005 12 29.22125 06 50 16.26 +24 14 01.7 20.7 R EY047734 Observer details: 291 LPL/Spacewatch II. Observer J. V. Scotti. 1.8-m f/2.7 reflector + CCD. 691 Steward Observatory, Kitt Peak. Observer R. S. McMillan. 0.9-m f/3 reflector + CCD. 734 Farpoint Observatory. Observer G. Hug. Measurer D. Tibbets. 0.7-m reflector + CCD. Orbital elements: 2005 YU55 Epoch 2005 Dec. 16.0 TT = JDT 2453720.5 MPC M 169.11098 (2000.0) P Q n 0.89504426 Peri. 273.04385 +0.14266712 +0.98977053 a 1.0663662 Node 5.15848 -0.90533720 +0.13074975 e 0.3258279 Incl. 0.39490 -0.40001332 +0.05708585 P 1.10 H 22.4 G 0.15 From 12 observations 2005 Dec. 28-29. E-assumed. Ephemeris: 2005 YU55 a,e,i = 1.07, 0.33, 0 q = 0.7189 Date TT R. A. (2000) Decl. Delta r Elong. Phase V 2005 12 26 07 00.57 +24 00.1 0.434 1.414 170.3 6.7 21.8 2006 01 05 06 28.15 +24 34.0 0.432 1.412 171.9 5.6 21.8 2006 01 15 05 58.46 +24 38.7 0.452 1.406 155.0 17.2 22.3 2006 01 25 05 36.65 +24 24.7 0.490 1.395 139.9 27.0 22.8 2006 02 04 05 24.38 +24 07.7 0.540 1.379 126.9 34.8 23.2 2006 02 14 05 20.85 +23 56.5 0.596 1.359 116.0 40.8 23.5 2006 02 24 05 24.30 +23 52.2 0.653 1.333 106.7 45.3 23.8 Timothy B. Spahr (C) Copyright 2005 MPC M.P.E.C. 2005-Y47
Target Name: 2005 YU55 HMag: 21.9 Diameter: 0.4 km Based on Arecibo observations in 2010 Period: 18 h Based on Arecibo observations in 2010 OC radar albedo: 0.2 Based on Arecibo observations in 2010 subradar lat: 0 deg (a standard guess) radar horizon: 20 deg The best dates for Goldstone observations are between November 3-11. Here are estimated monostatic signal-to-noise ratios at Goldstone. We will need bistatic observations with reception at DSS-13 during the closest approach on Nov 07-10. For bistatic observations, estimated monostatic SNRs should be divided by 4. Goldstone SNRs UTC Distance # SNR/ SNR/ Date DOY Week Rise Set RA Dec AU runs date run -------------------------------------------------------------------------- 2011 Oct 30 303 43 16:37-23:15 221 -16 0.073 160 120 10 2011 Oct 31 304 44 16:33-23:12 221 -16 0.065 180 190 16 2011 Nov 01 305 44 16:30-23:10 221 -16 0.057 205 320 25 2011 Nov 02 306 44 16:28-23:08 222 -16 0.049 237 590 42 2011 Nov 03 307 44 16:25-23:07 222 -16 0.041 282 1200 79 2011 Nov 04 308 44 16:24-23:06 223 -16 0.033 347 2900 170 2011 Nov 05 309 44 16:23-23:09 224 -16 0.025 452 8500 440 2011 Nov 06 310 44 16:26-23:18 227 -15 0.017 645 39000 1700 2011 Nov 07 311 45 16:39-23:53 233 -14 0.009 1134 4.6E5 15000 Short RTT necessitates bistatic observations 2011 Nov 08-9 312-313 45 18:31-10:14 336 +17 0.002 4155 9.6E7 1.6E6 Short RTT necessitates bistatic observations 2011 Nov 10 314 45 01:00-11:38 27 +18 0.010 1520 3.8E5 11000 Short RTT necessitates bistatic observations 2011 Nov 11 315 45 01:27-11:50 33 +17 0.018 921 41000 1500 2011 Nov 12 316 45 01:34-11:53 35 +17 0.026 661 9900 420 2011 Nov 13 317 45 01:36-11:52 36 +17 0.034 516 3500 170 2011 Nov 14 318 46 01:35-11:51 37 +17 0.042 422 1500 79 2011 Nov 15 319 46 01:34-11:49 37 +17 0.050 357 760 43 2011 Nov 16 320 46 01:31-11:46 38 +17 0.058 310 420 26 2011 Nov 17 321 46 01:29-11:43 38 +17 0.066 273 250 16 2011 Nov 18 322 46 01:26-11:40 38 +17 0.074 244 160 11 Arecibo SNRs horizons = 70.3 deg Ptx = 900 kW Bold marks requested tracks Monostatic UTC Distance # SNR/ SNR/ Date DOY Rise Set RA Dec AU runs date run -------------------------------------------------------------------------- 2011 Nov 08 312 19:14-21:48 283 +2 0.002 478 6.9E8 3.5E7 Short RTT necessitates bistatic observations 2011 Nov 10 314 01:29-04:20 26 +18 0.009 392 6.0E6 3.2E5 Short RTT necessitates bistatic observations 2011 Nov 11 315 01:54-04:40 32 +18 0.017 240 5.5E5 37000 2011 Nov 12 316 02:00-04:45 35 +17 0.025 174 1.2E5 9800 2011 Nov 13 317 02:01-04:46 36 +17 0.033 136 42000 3700 2011 Nov 14 318 02:00-04:45 37 +17 0.041 112 18000 1800 2011 Nov 15 319 01:59-04:43 37 +17 0.049 94 8800 950 2011 Nov 16 320 01:56-04:41 38 +17 0.057 82 4900 560 2011 Nov 17 321 01:54-04:38 38 +17 0.065 72 2900 350 2011 Nov 18 322 01:51-04:35 38 +17 0.073 64 1800 230 2011 Nov 19 323 01:48-04:32 38 +17 0.081 58 1200 160 2011 Nov 20 324 01:44-04:29 39 +17 0.089 52 810 120 2011 Nov 21 325 01:41-04:25 39 +17 0.097 48 570 85 2011 Nov 22 326 01:38-04:22 39 +17 0.105 44 410 64 2011 Nov 23 327 01:34-04:19 39 +17 0.113 42 310 49 2011 Nov 24 328 01:31-04:15 39 +17 0.121 38 230 39
GOLDSTONE TRACKS UT UT Local time Duration Round-trip DOY Week Date TX Window TX Window hh:mm time (sec) SNR/RTT --- ---- ---- --------- --------- -------- ---------- ------- 308 44 Nov 04 1630-1825 0930-1125 PDT Nov 04 1:55 33 170 monostatic and bistatic observations with DSS-13 310 44 Nov 06 1700-2300 0900-1500 PST Nov 06 6:00 17 1700 monostatic and bistatic observations with DSS-13 311 45 Nov 07 1905-2345 1105-1545 PST Nov 07 4:40 9 15000 bistatic observations with DSS-13 313 45 Nov 09 0130-0700 1730-2300 PST Nov 08 5:30 2.4 1.6E06 bistatic observations with DSS-13 0710-0900 Europa (J. L. Margot, PI) 314 45 Nov 10 0510-0950 2110-0150 PST Nov 09-10 4:50 10 11000 bistatic observations with DSS-13 315 45 Nov 11 0130-0700 1730-2300 PST Nov 10 5:30 18 1500 monostatic and bistatic observations with DSS-13 0710-0850 Europa (J. L. Margot, PI) The switch to Standard Time occurs on November 6, so the Goldstone track on Nov. 4 will occur during Daylight Saving Time. All the other tracks will occur during Standard Time. On Nov. 9 and 11 we observe Europa (J. L. Margot, PI) immediately after observing 2005 YU55. GOLDSTONE-MEDICINA TRACK UT UT Local time Duration Round-trip DOY Week Date TX Window TX Window hh:mm time (sec) --- ---- ---- --------- --------- -------- ---------- 315 45 Nov 11 0130-0145 1730-1745 PST Nov 10 00:15 18 (total overlapping view period: 0130-0415 UT) ARECIBO TRACKS These are dates and times requested. UT UT PST AST Duration Round-trip Monostatic DOY Date TX Window TX Window TX Window hh:mm time (sec) SNR/Run --- ---- --------- --------- --------- --------- ------- ------- 312 Nov 08 1914-2148 1114-1348 Nov 08 1514-1748 Nov 08 02:43 2.4 3.5E07 bistatic with Green Bank 314 Nov 10 0129-0420 1729-2020 Nov 09 2129-0020 Nov 09-10 02:53 9.2 3.2E05 bistatic with Green Bank 315 Nov 11 0154-0440 1754-2040 Nov 10 2154-0040 Nov 10-11 02:49 17.0 37000 bistatic with Green Bank 316 Nov 12 0200-0445 1800-2045 Nov 11 2200-0045 Nov 11-12 02:48 24.8 9800 bistatic with Green Bank 317 Nov 13 0201-0446 1801-2046 Nov 12 2201-0046 Nov 12-13 02:47 32.7 3700 318 Nov 14 0200-0445 1800-2045 Nov 13 2200-0045 Nov 13-14 02:47 40.6 1800 . . 323 Nov 19 0146-0433 1746-2033 Nov 18 2146-0033 Nov 18-19 02:47 80.4 160 Goldstone/Arecibo overlap (only one date): 315 Nov 11 0154-0440 1754-2040 Nov 10 2154-0040 Nov 09-10 2:49 Arecibo-VLBA Tracks UT UT PST AST DOY Date TX Window TX Window TX Window --- ---- --------- --------- --------- 315 Nov 11 0200-0441 1800-2041 Nov 10 2200-0041 Nov 10-11 316 Nov 12 0203-0453 1803-2053 Nov 11 2203-0053 Nov 11-12 317 Nov 13 0207-0448 1807-2048 Nov 12 2207-0048 Nov 12-13 20 minute blocks during each date. Arecibo-GBT Tracks UT UT PST AST DOY Date TX Window TX Window TX Window --- ---- --------- --------- --------- 312 Nov 08 1914-2148 1114-1348 Nov 08 1514-1748 Nov 08 314 Nov 10 0129-0420 1729-2020 Nov 09 2129-0020 Nov 09-10 315 Nov 11 0154-0440 1754-2040 Nov 10 2154-0040 Nov 10-11 316 Nov 12 0200-0445 1800-2045 Nov 11 2200-0045 Nov 11-12 DSS-14/DSS-43 Common View Periods It's possible that we may do bistatic DSS-14/DSS-43 (Goldstone-Canberra) bistatic observations. To facilitate planning, here are common view periods using times actually scheduled at DSS-14. This assumes horizons = 20 deg at DSS-14 and 15 deg at DSS-43 DOY Date Start Stop 308 Nov 04 No overlap 310 Nov 06 20:41-23:00 311 Nov 07 21:09-23:50 313 Nov 09 07:10-09:00 314 Nov 10 09:00-09:50 315 Nov 11 No overlap
From Jon Giorgini, Nov 09 2011: Including last night's post-encounter Doppler, 2005 YU55 solution #86 was estimated. Formal 3-sigma uncertainties: Date__(UT)__HR:MN POS_3sigma DOP_S_3sig DOP_X_3sig RT_delay_3sig 2011-Nov-10 00:00 2.926 0.20 0.71 0.000016 2011-Nov-11 00:00 1.518 0.05 0.18 0.000013 2011-Nov-12 00:00 1.018 0.02 0.06 0.000012 2011-Nov-13 00:00 0.764 0.01 0.03 0.000012 2011-Nov-14 00:00 0.610 0.01 0.03 0.000012 2011-Nov-15 00:00 0.507 0.01 0.04 0.000013 2011-Nov-16 00:00 0.434 0.01 0.05 0.000013 2011-Nov-17 00:00 0.379 0.01 0.05 0.000013 2011-Nov-18 00:00 0.336 0.01 0.05 0.000014 2011-Nov-19 00:00 0.301 0.02 0.06 0.000015 2011-Nov-20 00:00 0.273 0.02 0.06 0.000015From Jon Giorgini, Nov 07 2011, Solution #78: Formal 3-sigma uncertainties for Nov 09 track: Date__(UT)__HR:MN POS_3sigma DOP_X_3sig RT_delay_3sig 2011-Nov-09 01:30 10.322 1.25 0.000011 2011-Nov-09 02:30 9.815 1.32 0.000011 2011-Nov-09 03:30 9.214 1.35 0.000010 2011-Nov-09 04:30 8.579 1.31 0.000010 2011-Nov-09 05:30 7.954 1.22 0.000010 2011-Nov-09 06:30 7.363 1.12 0.000009
From Jon Giorgini, Nov 06 2011, Solution #76: Including two new Dopplers and 3 delays from Goldstone, here are formal 3-sigma X-band uncertainties at 30 minute steps: Date__(UT)__HR:MN POS_3sigma DOP_X_3sig RT_delay_3sig 2011-Nov-07 19:00 3.981 1.94 0.000015 2011-Nov-07 19:30 4.050 2.00 0.000015 2011-Nov-07 20:00 4.121 2.06 0.000016 2011-Nov-07 20:30 4.194 2.14 0.000016 2011-Nov-07 21:00 4.269 2.22 0.000017 2011-Nov-07 21:30 4.346 2.32 0.000017 2011-Nov-07 22:00 4.426 2.42 0.000017 2011-Nov-07 22:30 4.509 2.54 0.000018 2011-Nov-07 23:00 4.594 2.67 0.000019 2011-Nov-07 23:30 4.682 2.81 0.000019 2011-Nov-08 00:00 4.773 2.96 0.000020
From Jon Giorgini, Nov 04 2011, Solution #72: Including the new Doppler and 2 delays from Goldstone, solution #72 3-sigma formal uncertainties are ... Date__(UT)__HR:MN POS_3sigma DOP_S_3sig DOP_X_3sig RT_delay_3sig 2011-Nov-03 00:00 1.752 0.08 0.28 0.000005 2011-Nov-04 00:00 2.126 0.05 0.19 0.000005 2011-Nov-05 00:00 2.685 0.02 0.08 0.000004 2011-Nov-06 00:00 3.615 0.13 0.46 0.000006 2011-Nov-07 00:00 5.461 0.47 1.72 0.000016 2011-Nov-08 00:00 10.733 2.29 8.34 0.000059 2011-Nov-09 00:00 21.029 0.98 3.58 0.000362 2011-Nov-10 00:00 10.262 2.18 7.91 0.000134 2011-Nov-11 00:00 5.638 0.54 1.97 0.000096 2011-Nov-12 00:00 3.934 0.19 0.69 0.000085 Future uncertainties are reduced to ~25% (or better) of the pre-experiment values. ----------------------------------------------------------------------------------------- From Jon Giorgini, Oct 29 2011, Solution #64, (765 optical measurements were reported by 61 observatories (2005-Dec-24 to 2010-Apr-20), and 3 delay and 4 Dopplers were reported from Arecibo (2010-Apr)) Formal 3-sigma X-band uncertainties are below: (arcsec) (Hz) (seconds) Date__(UT)__HR:MN POS_3sigma DOP_X_3sig RT_delay_3sig 2011-Nov-03 00:00 5.980 1.61 0.000352 2011-Nov-04 00:00 7.207 1.25 0.000341 2011-Nov-05 00:00 9.036 0.60 0.000336 2011-Nov-06 00:00 12.053 0.93 0.000341 2011-Nov-07 00:00 17.963 5.09 0.000372 2011-Nov-08 00:00 34.238 26.05 0.000505 2011-Nov-09 00:00 70.935 101.68 0.001215 2011-Nov-10 00:00 35.842 28.45 0.000197 2011-Nov-11 00:00 19.227 6.54 0.000097 2011-Nov-12 00:00 13.289 1.99 0.000088 Uncertainties of the previous orbital solution - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Apparent Magnitudes and Solar Elongations: Date__(UT)__HR:MN R.A._(J2000.0)_DEC. APmag delta S-O-T /r 2011-Oct-25 00:00 219.7 -16.1 n.a. 0.1208 11.3 /T 2011-Oct-26 00:00 219.8 -16.1 n.a. 0.1124 10.4 /T 2011-Oct-27 00:00 220.0 -16.1 n.a. 0.1041 9.6 /T 2011-Oct-28 00:00 220.1 -16.1 n.a. 0.0958 8.7 /T 2011-Oct-29 00:00 220.3 -16.1 n.a. 0.0876 7.8 /T 2011-Oct-30 00:00 220.4 -16.1 n.a. 0.0794 7.0 /T 2011-Oct-31 00:00 220.6 -16.1 n.a. 0.0713 6.1 /T 2011-Nov-01 00:00 220.9 -16.0 n.a. 0.0633 5.3 /T 2011-Nov-02 00:00 221.2 -16.0 n.a. 0.0553 4.6 /T 2011-Nov-03 00:00 221.6 -15.9 n.a. 0.0473 3.9 /T 2011-Nov-04 00:00 222.1 -15.8 n.a. 0.0393 3.4 /T 2011-Nov-05 00:00 222.9 -15.7 n.a. 0.0314 3.2 /T 2011-Nov-06 00:00 224.2 -15.4 n.a. 0.0236 3.5 /T 2011-Nov-07 00:00 226.8 -14.8 n.a. 0.0157 5.2 /T 2011-Nov-08 00:00 234.6 -13.0 n.a. 0.0080 12.0 /T 2011-Nov-09 00:00 310.2 11.4 11.68 0.0021 90.1 /T 2011-Nov-10 00:00 24.1 18.5 12.45 0.0083 160.4 /T 2011-Nov-11 00:00 31.7 17.6 13.68 0.0160 166.8 /T 2011-Nov-12 00:00 34.4 17.2 14.50 0.0238 168.3 /T 2011-Nov-13 00:00 35.7 17.0 15.12 0.0317 168.6 /T 2011-Nov-14 00:00 36.5 16.8 15.62 0.0396 168.3 /T 2011-Nov-15 00:00 37.0 16.8 16.05 0.0475 167.9 /T 2011-Nov-16 00:00 37.4 16.7 16.42 0.0555 167.2 /T 2011-Nov-17 00:00 37.7 16.6 16.75 0.0635 166.5 /T 2011-Nov-18 00:00 38.0 16.6 17.05 0.0715 165.7 /T 2011-Nov-19 00:00 38.2 16.6 17.32 0.0795 164.9 /T 2011-Nov-20 00:00 38.4 16.6 17.57 0.0876 164.1 /T 2011-Nov-21 00:00 38.5 16.5 17.80 0.0958 163.2 /T 2011-Nov-22 00:00 38.7 16.5 18.01 0.1039 162.3 /T - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - The table below lists right ascension, declination, apparent magnitude, solar elongation (deg) distance in lunar distances, and round-trip light travel times (RTT, in seconds) at one-hour intervals during the closest approach: Date (UT) HR:MN R.A. DEC Apparent Solar Lunar RTT magnitude Elongation Distances (s) 2011-Nov-07 00:00 226.99 -14.81 n.a. 5.3 /T 6.1 15.8 2011-Nov-07 01:00 227.16 -14.77 n.a. 5.5 /T 6.0 15.4 2011-Nov-07 02:00 227.34 -14.73 n.a. 5.6 /T 5.9 15.1 2011-Nov-07 03:00 227.52 -14.69 n.a. 5.8 /T 5.7 14.8 2011-Nov-07 04:00 227.72 -14.65 n.a. 5.9 /T 5.6 14.4 2011-Nov-07 05:00 227.92 -14.60 n.a. 6.1 /T 5.5 14.1 2011-Nov-07 06:00 228.13 -14.55 n.a. 6.3 /T 5.4 13.8 2011-Nov-07 07:00 228.36 -14.50 n.a. 6.4 /T 5.2 13.5 2011-Nov-07 08:00 228.59 -14.45 n.a. 6.6 /T 5.1 13.2 2011-Nov-07 09:00 228.84 -14.40 n.a. 6.9 /T 5.0 12.8 2011-Nov-07 10:00 229.09 -14.34 n.a. 7.1 /T 4.9 12.5 2011-Nov-07 11:00 229.37 -14.27 n.a. 7.3 /T 4.7 12.2 2011-Nov-07 12:00 229.65 -14.21 n.a. 7.6 /T 4.6 11.9 2011-Nov-07 13:00 229.95 -14.14 n.a. 7.8 /T 4.5 11.5 2011-Nov-07 14:00 230.27 -14.06 n.a. 8.1 /T 4.4 11.2 2011-Nov-07 15:00 230.61 -13.98 n.a. 8.4 /T 4.2 10.9 2011-Nov-07 16:00 230.96 -13.90 n.a. 8.7 /T 4.1 10.6 2011-Nov-07 17:00 231.35 -13.81 n.a. 9.1 /T 4.0 10.2 2011-Nov-07 18:00 231.75 -13.71 n.a. 9.4 /T 3.8 9.9 2011-Nov-07 19:00 232.18 -13.61 n.a. 9.8 /T 3.7 9.6 2011-Nov-07 20:00 232.64 -13.49 n.a. 10.3 /T 3.6 9.3 2011-Nov-07 21:00 233.14 -13.37 n.a. 10.7 /T 3.5 9.0 2011-Nov-07 22:00 233.66 -13.24 n.a. 11.2 /T 3.4 8.6 2011-Nov-07 23:00 234.23 -13.10 n.a. 11.7 /T 3.2 8.3 2011-Nov-08 00:00 234.84 -12.94 n.a. 12.3 /T 3.1 8.0 2011-Nov-08 01:00 235.51 -12.77 n.a. 13.0 /T 3.0 7.7 2011-Nov-08 02:00 236.22 -12.59 n.a. 13.6 /T 2.9 7.4 2011-Nov-08 03:00 237.00 -12.38 n.a. 14.4 /T 2.8 7.1 2011-Nov-08 04:00 237.85 -12.16 n.a. 15.2 /T 2.6 6.8 2011-Nov-08 05:00 238.78 -11.91 n.a. 16.1 /T 2.5 6.4 2011-Nov-08 06:00 239.80 -11.63 n.a. 17.1 /T 2.4 6.1 2011-Nov-08 07:00 240.93 -11.31 n.a. 18.2 /T 2.3 5.8 2011-Nov-08 08:00 242.18 -10.96 n.a. 19.5 /T 2.2 5.5 2011-Nov-08 09:00 243.57 -10.56 n.a. 20.9 /T 2.1 5.2 2011-Nov-08 10:00 245.12 -10.11 n.a. 22.4 /T 1.9 4.9 2011-Nov-08 11:00 246.87 -9.59 n.a. 24.2 /T 1.8 4.6 2011-Nov-08 12:00 248.84 -8.98 n.a. 26.2 /T 1.7 4.4 2011-Nov-08 13:00 251.08 -8.29 n.a. 28.5 /T 1.6 4.1 2011-Nov-08 14:00 253.63 -7.47 n.a. 31.1 /T 1.5 3.8 2011-Nov-08 15:00 256.57 -6.51 n.a. 34.1 /T 1.4 3.5 2011-Nov-08 16:00 259.95 -5.38 n.a. 37.6 /T 1.3 3.3 2011-Nov-08 17:00 263.87 -4.05 n.a. 41.7 /T 1.2 3.0 2011-Nov-08 18:00 268.41 -2.47 n.a. 46.5 /T 1.1 2.8 2011-Nov-08 19:00 273.66 -0.62 n.a. 52.0 /T 1.0 2.6 2011-Nov-08 20:00 279.69 1.51 n.a. 58.4 /T 0.95 2.5 2011-Nov-08 21:00 286.53 3.90 13.12 65.6 /T 0.90 2.3 2011-Nov-08 22:00 294.13 6.47 12.55 73.5 /T 0.88 2.2 2011-Nov-08 23:00 302.30 9.08 12.07 82.0 /T 0.85 2.2 2011-Nov-09 00:00 310.76 11.55 11.70 90.6 /T 0.85 2.2 2011-Nov-09 01:00 319.15 13.73 11.42 99.1 /T 0.87 2.2 2011-Nov-09 02:00 327.15 15.51 11.24 107.0 /T 0.91 2.3 2011-Nov-09 03:00 334.50 16.86 11.14 114.1 /T 0.96 2.5 2011-Nov-09 04:00 341.06 17.84 11.10 120.4 /T 1.0 2.6 2011-Nov-09 05:00 346.81 18.51 11.10 125.9 /T 1.1 2.8 2011-Nov-09 06:00 351.80 18.95 11.13 130.6 /T 1.2 3.1 2011-Nov-09 07:00 356.12 19.22 11.18 134.6 /T 1.3 3.3 2011-Nov-09 08:00 359.84 19.37 11.24 138.1 /T 1.4 3.6 2011-Nov-09 09:00 3.06 19.44 11.32 141.1 /T 1.5 3.8 2011-Nov-09 10:00 5.85 19.46 11.40 143.7 /T 1.6 4.1 2011-Nov-09 11:00 8.29 19.44 11.48 146.0 /T 1.7 4.4 2011-Nov-09 12:00 10.43 19.39 11.56 147.9 /T 1.8 4.7 2011-Nov-09 13:00 12.32 19.33 11.64 149.7 /T 1.9 5.0 2011-Nov-09 14:00 13.99 19.26 11.73 151.2 /T 2.0 5.2 2011-Nov-09 15:00 15.48 19.18 11.81 152.6 /T 2.2 5.5 2011-Nov-09 16:00 16.82 19.10 11.89 153.8 /T 2.3 5.9 2011-Nov-09 17:00 18.02 19.02 11.97 154.9 /T 2.4 6.2 2011-Nov-09 18:00 19.11 18.94 12.04 155.9 /T 2.5 6.5 2011-Nov-09 19:00 20.10 18.87 12.12 156.8 /T 2.6 6.8 2011-Nov-09 20:00 21.00 18.79 12.19 157.6 /T 2.8 7.1 2011-Nov-09 21:00 21.82 18.72 12.26 158.4 /T 2.9 7.4 2011-Nov-09 22:00 22.58 18.65 12.33 159.1 /T 3.0 7.7 2011-Nov-09 23:00 23.28 18.59 12.40 159.7 /T 3.1 8.0 2011-Nov-10 00:00 23.92 18.52 12.47 160.2 /T 3.2 8.4 2011-Nov-10 01:00 24.52 18.46 12.53 160.7 /T 3.4 8.7 2011-Nov-10 02:00 25.07 18.40 12.60 161.2 /T 3.5 9.0 2011-Nov-10 03:00 25.58 18.34 12.66 161.7 /T 3.6 9.3 2011-Nov-10 04:00 26.06 18.29 12.72 162.1 /T 3.7 9.6 2011-Nov-10 05:00 26.51 18.24 12.78 162.5 /T 3.9 9.9 2011-Nov-10 06:00 26.93 18.19 12.83 162.8 /T 4.0 10.3 2011-Nov-10 07:00 27.33 18.14 12.89 163.2 /T 4.1 10.6 2011-Nov-10 08:00 27.70 18.10 12.95 163.5 /T 4.2 10.9 2011-Nov-10 09:00 28.05 18.05 13.00 163.8 /T 4.4 11.2 2011-Nov-10 10:00 28.38 18.01 13.05 164.1 /T 4.5 11.6 2011-Nov-10 11:00 28.70 17.97 13.10 164.3 /T 4.6 11.9 2011-Nov-10 12:00 28.99 17.94 13.15 164.6 /T 4.7 12.2 2011-Nov-10 13:00 29.27 17.90 13.20 164.8 /T 4.9 12.5 2011-Nov-10 14:00 29.54 17.87 13.25 165.0 /T 5.0 12.8 2011-Nov-10 15:00 29.79 17.83 13.30 165.2 /T 5.1 13.2 2011-Nov-10 16:00 30.03 17.80 13.35 165.4 /T 5.2 13.5 2011-Nov-10 17:00 30.26 17.77 13.39 165.6 /T 5.4 13.8 2011-Nov-10 18:00 30.48 17.74 13.44 165.8 /T 5.5 14.1 2011-Nov-10 19:00 30.69 17.71 13.48 165.9 /T 5.6 14.5 2011-Nov-10 20:00 30.89 17.68 13.52 166.1 /T 5.8 14.8 2011-Nov-10 21:00 31.08 17.66 13.57 166.2 /T 5.9 15.1 2011-Nov-10 22:00 31.27 17.63 13.61 166.3 /T 6.0 15.4 2011-Nov-10 23:00 31.44 17.61 13.65 166.5 /T 6.1 15.8 2011-Nov-11 00:00 31.61 17.58 13.69 166.6 /T 6.3 16.1 The Moon will be in a waxing gibbous phase and will be up the entire time during Nov. 8/9 that YU55 is visible after dark.
Plan for the fourth track: 5 CW runs, correct Doppler is necessary. -chirping at 40 MHz, PRP at 20 us (sampling with both 40 MHz and 80 MHz) + 8 Hz offset CW setup: --------------------------------------------------------------------------- TX polarization RCP RCV polarization LCP & RCP Frequency hops: none Bandwidth: 4000 Hz Sampling interval: 2500 x 0.1 usec VME FFT for PSD files: 32768 for 0.12-Hz resolution ------------------------------------------------------------------------- 1-usec single sample baud 1 usec code 255 ncoh 12 bandwidth 327 Hz FFT 128 dfreq 2.6 Hz TXoff +50 Hz (echo in bin 64+16 =80) ------------------------------------------------------------------------------- _____________________________________________________________________ POSSIBLE RANGING SETUPS: (code=127, FFT=64, single-pol'n) These are from JX, w/ max-band (min-acc) options from Ray Jurgens. Currently configured for 5-sec records. _______________________________________________________________________ Setup Baud RP 1-acc 1-acc usec m usec band res acc band res _______________________________________________________________________ JX1XS110 11.000 1650 1397.0 715.8 11.2 2 358 5.6 JX1XS070 7.000 1050 889.0 1124.9 17.6 3 375 5.9 JX1XS020 2.000 300 254.0 3937.0 61.5 12 328 5.1 4 984 15.4 JX1XS010 1.000 150 127.0 7874.0 123.0 41 192 3.0 8 984 15.4 JX1XS005 0.500 75 63.5 15748.0 246.1 123 128 2.0 15 1050 16.4 JX1XS002 0.250 37.5 31.75 31496.1 492.1 492 64 1.0 30 1050 16.4 JX1XS001 0.125 18.75 15.875 62992.1 984.3 1970 32 0.5 60 1050 16.4 ____________________________________________________________________
OSOD and predicts are on aardvark: Predicts for Nov 10th track have been established in this sub-directory. /export/data3/osod/ops/2005yu55 PRDX.OUT.14v-13-13.s86 PUNCH.OUT.14v-13-13.s86 EPH.OUT.s86 Please note: Doppler at the uplink POINTING TX Offsets Date (UTC) DOY hhmmss RA Dec Macro LHA Dec RTT OSOD 2011 11 10 314 040000 26.3672 18.27390 A 9.6 2011 11 10 314 050000 26.7645 18.23230 A -1.10 -0.10 9.9 s86 2011 11 10 314 060000 27.1322 18.18860 A 10.2 2011 11 10 314 060000 27.1322 18.18860 B 10.2 2011 11 10 314 070000 27.4763 18.14290 B 10.5 2011 11 10 314 080000 27.8020 18.09560 B -1.00 -0.20 10.8 s86 2011 11 10 314 090000 28.1140 18.04700 B 11.2 2011 11 10 314 100000 28.4159 17.99780 B 11.5 Transmit offsets are given in millidegrees.
PRDX.OUT.14v-13-13.s86 TRANSMITTER: STATION #14, RECEIVER: STATION #13 RECEIVER U.T. RANGE DOPPLER LHA DEC RA EL 2011 NOV 10 04:00 9.5705632640 -747936.197 325.8114 18.2746 26.367 55.329 2011 NOV 10 04:10 9.6230166018 -748866.029 328.2497 18.2678 26.436 57.178 2011 NOV 10 04:20 9.6755356848 -749812.260 330.6890 18.2610 26.503 58.991 2011 NOV 10 04:30 9.7281216206 -750773.661 333.1293 18.2541 26.570 60.762 2011 NOV 10 04:40 9.7807754257 -751748.963 335.5704 18.2471 26.636 62.482 2011 NOV 10 04:50 9.8334980313 -752736.863 338.0124 18.2401 26.700 64.139 2011 NOV 10 05:00 9.8862902723 -753736.019 340.4553 18.2330 26.764 65.719 2011 NOV 10 05:10 9.9391528881 -754745.057 342.8990 18.2259 26.828 67.206 2011 NOV 10 05:20 9.9920865251 -755762.576 345.3435 18.2187 26.890 68.578 2011 NOV 10 05:30 10.0450917275 -756787.146 347.7887 18.2114 26.952 69.813 2011 NOV 10 05:40 10.0981689361 -757817.314 350.2347 18.2041 27.012 70.882 2011 NOV 10 05:50 10.1513184932 -758851.607 352.6814 18.1968 27.073 71.755 2011 NOV 10 06:00 10.2045406367 -759888.534 355.1288 18.1893 27.132 72.403 2011 NOV 10 06:10 10.2578354960 -760926.589 357.5768 18.1818 27.191 72.800 2011 NOV 10 06:20 10.3112030996 -761964.253 0.0255 18.1743 27.249 72.927 2011 NOV 10 06:30 10.3646433655 -763000.002 2.4747 18.1667 27.307 72.779 2011 NOV 10 06:40 10.4181561043 -764032.303 4.9246 18.1591 27.364 72.362 2011 NOV 10 06:50 10.4717410234 -765059.624 7.3750 18.1514 27.420 71.694 2011 NOV 10 07:00 10.5253977187 -766080.431 9.8259 18.1436 27.476 70.802 2011 NOV 10 07:10 10.5791256800 -767093.195 12.2773 18.1358 27.531 69.716 2011 NOV 10 07:20 10.6329242917 -768096.396 14.7292 18.1280 27.586 68.464 2011 NOV 10 07:30 10.6867928277 -769088.520 17.1816 18.1201 27.641 67.075 2011 NOV 10 07:40 10.7407304618 -770068.071 19.6344 18.1121 27.695 65.572 2011 NOV 10 07:50 10.7947362582 -771033.564 22.0877 18.1042 27.748 63.975 2011 NOV 10 08:00 10.8488091830 -771983.539 24.5413 18.0962 27.802 62.301 2011 NOV 10 08:10 10.9029480966 -772916.554 26.9953 18.0881 27.854 60.564 2011 NOV 10 08:20 10.9571517621 -773831.193 29.4497 18.0801 27.907 58.775 2011 NOV 10 08:30 11.0114188144 -774726.069 31.9044 18.0720 27.959 56.942 2011 NOV 10 08:40 11.0657479005 -775599.825 34.3595 18.0638 28.011 55.074 2011 NOV 10 08:50 11.1201374152 -776451.137 36.8148 18.0557 28.062 53.176 2011 NOV 10 09:00 11.1745857661 -777278.718 39.2705 18.0475 28.114 51.254 2011 NOV 10 09:10 11.2290912457 -778081.320 41.7264 18.0394 28.164 49.311 2011 NOV 10 09:20 11.2836520626 -778857.734 44.1826 18.0312 28.215 47.351 2011 NOV 10 09:30 11.3382663389 -779606.796 46.6390 18.0230 28.266 45.378 2011 NOV 10 09:40 11.3929321199 -780327.390 49.0956 18.0148 28.316 43.394 2011 NOV 10 09:50 11.4476473710 -781018.445 51.5525 18.0065 28.366 41.401 2011 NOV 10 10:00 11.5024099860 -781678.940 54.0096 17.9983 28.416 39.401 2011 NOV 10 10:10 11.5572177907 -782307.910 56.4669 17.9901 28.465 37.397 2011 NOV 10 10:20 11.6120685419 -782904.441 58.9243 17.9819 28.514 35.388 2011 NOV 10 10:30 11.6669599357 -783467.676 61.3820 17.9738 28.564 33.378 2011 NOV 10 10:40 11.7218896133 -783996.815 63.8398 17.9656 28.613 31.366 2011 NOV 10 10:50 11.7768551545 -784491.119 66.2977 17.9575 28.662 29.355 2011 NOV 10 11:00 11.8318540981 -784949.908 68.7558 17.9493 28.710 27.346
2005YU55 GOLDSTONE MASTERLOG
2005 YU55 Goldstone Masterlog = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = 2005 YU55 ARECIBO MASTERLOG: 2011 Observations ============================================== Proposal R2629 Last update: 2011 Dec 12 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2011 Nov 08 Bistatic with Green Bank (Michael Busch at GBT) Observations conducted by Patrick Taylor and Mike Nolan <--- AST ---> <--- UTC ---> rcsta rcend rcsta rcend Setup Code Bandwidth osod TXoff Runs HHMMSS-HHMMSS HHMMSS-HHMMSS CW no hop 5000 78 +150 152746- 192746- Bistatic with GBT 0.1 usec 65535 152.6 78 +0.5 171541- 211541- Bistatic with GBT - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2011 Nov 10 (UTC) Bistatic with Green Bank (Michael Busch at GBT) Observations conducted by Patrick Taylor and Mike Nolan <--- AST ---> <--- UTC ---> rcsta rcend rcsta rcend Setup Code Bandwidth osod TXoff Runs HHMMSS-HHMMSS HHMMSS-HHMMSS CW no hop 5000 86 +150 212922- 012922- Bistatic with GBT 0.1 usec 65535 152.6 86 +0.5 220359- 020359- Bistatic with GBT CW no hop 5000 86 +150 230025- 030025- Bistatic with GBT 0.1 usec 65535 152.6 86 +0.5 231400- 031400- Bistatic with GBT - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2011 Nov 11 (UTC) Monostatic and bistatic with GBT and VLBA (Michael Busch at GBT) Observations conducted by Patrick Taylor and Mike Nolan <--- AST ---> <--- UTC ---> rcsta rcend rcsta rcend Setup Code Bandwidth osod TXoff Runs HHMMSS-HHMMSS HHMMSS-HHMMSS CW no hop 5000 86 +150 223959- 023959- Bistatic with GBT CW no hop 5000 86 +150 6 225515-225836 025515-025836 Monostatic CW no hop 5000 86 0 230730- 030730- Bistatic with VLBA 1.0 usec 32767 30.5 86 +2 9 233302-233905 033302-033905 Monostatic 0.1 usec 65535 152.6 86 +5 21 234540-235945 034540-035945 Monostatic - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2011 Nov 12 (UTC) Bistatic with GBT and VLBA Observations conducted by Patrick Taylor and Mike Nolan <--- AST ---> <--- UTC ---> rcsta rcend rcsta rcend Setup Code Bandwidth osod TXoff Runs HHMMSS-HHMMSS HHMMSS-HHMMSS 0.1 usec 65535 152.6 86 +0.5 000400- 040400- Bistatic with GBT CW no hop 5000 86 +150 1 221430-221449 021430-021449 Monostatic Cw no hop 5000 86 +150 222708- 022708- Bistatic with GBT 0.1 usec 65535 152.6 86 +0.5 223330- 023330- Bistatic with GBT CW no hop 5000 86 0 230010- 030010- Bistatic with VLBA 0.1 usec 65535 152.6 86 +0.5 234730- 034730- Bistatic with GBT - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2011 Nov 13 (UTC) Monostatic and bistatic with VLBA Observations conducted by Patrick Taylor and Mike Nolan <--- AST ---> <--- UTC ---> rcsta rcend rcsta rcend Setup Code Bandwidth osod TXoff Runs HHMMSS-HHMMSS HHMMSS-HHMMSS CW no hop 5000 86 +150 5 222922-223415 022922-023415 Monostatic 0.05 usec 65535 305.2 86 +2 20 223559-225718 023559-025718 Monostatic CW no hop 5000 86 0 225859- 025859- Bistatic with VLBA 0.05 usec 65535 305.2 86 +2 58 234108-004537 034108-044537 Monostatic - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2011 Nov 14 (UTC) Monostatic observations Observations conducted by Patrick Taylor and Mike Nolan <--- AST ---> <--- UTC ---> rcsta rcend rcsta rcend Setup Code Bandwidth osod TXoff Runs HHMMSS-HHMMSS HHMMSS-HHMMSS CW no hop 5000 86 +150 6 220103-221206 020103-021206 Monostatic 0.05 usec 65535 305.2 86 +2 60 221953-234636 021953-034636 Monostatic - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2011 Nov 19 (UTC) Monostatic Observations Observations conducted by Patrick Taylor, Mike Nolan, and Lance Benner <--- AST ---> <--- UTC ---> rcsta rcend rcsta rcend Setup Code Bandwidth osod TXoff Runs HHMMSS-HHMMSS HHMMSS-HHMMSS CW no hop 5000 96 +150 3 222350-223022 022350-023022 0.1 usec 65535 152.6 96 +5 27 225521-002659 025521-042659 There were a couple of short gaps in imaging due to transmitter trips. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Dr. Lance A. M. Benner | PHONE: (818) 354-7412 Mail Stop 300-233 | FAX: (818) 354-9476 Jet Propulsion Laboratory | email: lance.benner@jpl.nasa.gov California Institute of Technology | Plan: To live long and prosper Pasadena, CA 91109-8099 http://echo.jpl.nasa.gov/asteroids/2005YU55/2005YU55_planning.html