Goldstone Radar Observations Planning: 2005 AY28 & 2006 DP14
This is a planning page for Goldstone radar observations of two near-Earth asteroids scheduled between February 7-13, 2014. Here are dates when observations are scheduled for each object: Goldstone Tracks Arecibo Goldstone expectations 2005 AY28 Feb 7- 9 2 Not yet scheduled CW and ranging 2006 DP14 Feb 8-13 3 Not yet scheduled Imaging This is going to be a hectic set of observations at Goldstone with tracks for two asteroids over several days (in addition to an orbital debris radar track). The times for 2005 AY28 and 2006 DP14 do not overlap, but on February 8-9, the time between AY28 and DP14 is only a couple of hours. 2006 DP14 will be a good imaging target. 2005 AY28 2005 AY28 will approach within 0.039 AU on February 7, 2014, when it should be weakly detectable at Goldstone. Our principal goals with this object are to improve its orbit and study its physical properties. Nothing is currently known about its physical properties, but its absolute magnitude of 21.5 suggests a diameter of roughly 160 meters. This object is unlikely to produce echoes strong enough for imaging unless it's much larger, more slowly rotating, and reflective than expected. Plane-of-sky pointing uncertainties are currently a bit large for radar observations, but it's very likely that additional astrometry will come in that will improve the orbit sufficiently. The Minor Planet Center has classified 2005 AY28 as a "Potentially Hazardous Asteroid." 2006 DP14 2006 DP14 was discovered on Feb. 23, 2006 by LINEAR. Its absolute magnitude of 18.8 suggests a diameter within a factor of two of 0.55 km. Otherwise its physical properties are unknown. This asteroid will approach within 0.016 AU (6.2 lunar distances) on February 10, 2014, when it will be too far south for Goldstone to observe. Shortly before and after the closest approach, however, this asteroid will be far enough north for Goldstone to track, and we're expecting it to be a strong imaging target. Goldstone tracks are scheduled on February 8, 12, and 13. The day with the highest signal-to-noise ratios is February 12. This asteroid will be too far south for imaging at Arecibo, although it will enter the beam at Arecibo on Feb. 16 when it will still be close enough for CW observations and coarse-resolution ranging. 2006 DP14 has pointing uncertainties that are uncomfortably large, and unfortunately, this object will be too close to the Sun for optical observations until shortly after the Goldstone observations start. As such, locating the echo for this object may be much more difficult than usual. The Minor Planet Center has classified 2006 DP14 as a "Potentially Hazardous Asteroid." Summary The table below gives the discovery date, telescope, close approach distance and date, orbital parameters, and physical properties for each object.
Orbital and Physical Characteristics Provisional Designation 2005 AY28 2006 DP14 Asteroid number 348306 Not numbered Discoverer LINEAR LINEAR Discovery date 2005 Jan 15 2006 Feb 23 orbit type Aten Apollo Close approach dist. 0.039 AU 0.016 AU Close approach dist. 15.2 LD 6.2 LD Close approach date Feb 07 Feb 10 semimajor axis 0.872 AU 1.365 AU eccentricity 0.570 0.776 inclination 5.9 deg 11.8 deg perihelion distance 0.375 AU 0.306 AU aphelion distance 1.369 AU 2.424 AU Tisserand parameter 6.635 4.444 Neither is cometary absolute magnitude (H) 21.5 18.8 diameter 0.16 km 0.55 km +- a factor of two for both objects optical albedo unknown unknown rotation period unknown unknown pole direction unknown unknown lightcurve amplitude unknown unknown spectral class unknown unknown PHA PHA Last update: 2014 Feb 20
FUTURE CLOSE APPROACHES THROUGH 2050 2005 AY28 Date (CT) Body CA Dist MinDist MaxDist Vrel TCA3Sg Nsigs P_i/p A.D. 2014 Feb 07.30152 Earth .039392 .039388 .039396 17.058 0.23 2.44E5 .000000 A.D. 2015 Nov 13.90046 Merc .048320 .048311 .048329 23.866 1.21 3.20E5 .000000 A.D. 2018 May 14.92598 Merc .046922 .046913 .046931 30.249 1.07 3.01E5 .000000 A.D. 2021 Jul 04.88087 Venus .055982 .055957 .056007 18.864 0.95 78928. .000000 A.D. 2023 Dec 16.84725 Venus .053664 .053638 .053691 24.054 1.11 74914. .000000 A.D. 2024 Dec 15.37819 Venus .055888 .055876 .055899 23.405 1.10 1.80E5 .000000 A.D. 2026 Jun 19.35402 Merc .046646 .046630 .046662 24.100 2.39 3.62E5 .000000 A.D. 2027 May 29.01072 Venus .079918 .079908 .079929 18.132 0.96 2.11E5 .000000 A.D. 2028 Dec 18.69782 Merc .048986 .048975 .048998 30.612 1.21 3.96E5 .000000 A.D. 2036 Feb 08.22733 Earth .062868 .062860 .062877 16.053 0.26 2.62E5 .000000 A.D. 2037 Jan 21.71404 Merc .037200 .037197 .037203 25.889 0.45 3.76E5 .000000 A.D. 2039 Jul 24.49161 Merc .038327 .038326 .038329 28.316 0.17 2.36E5 .000000 A.D. 2047 Aug 28.23215 Merc .036549 .036545 .036552 26.106 1.28 2.76E5 .000000 A.D. 2050 Feb 27.02170 Merc .037423 .037416 .037430 28.029 1.37 3.72E5 .000000 2006 DP14 Date (CT) Body CA Dist MinDist MaxDist Vrel TCA3Sg Nsigs P_i/p A.D. 2014 Feb 10.79569 Earth .016033 .016027 .016039 27.135 1.83 1.16E5 .000000 A.D. 2017 Feb 24.59337 Merc .037716 .037645 .037787 24.096 14.42 1.20E5 .000000 A.D. 2022 Jan 18.53701 Venus .019109 .018875 .019344 30.295 13.51 3658.5 .000000 A.D. 2029 Nov 28.14252 Merc .039115 .038843 .039390 28.803 38.56 1.29E5 .000000 A.D. 2037 Dec 04.44969 Merc .067851 .067456 .068285 22.948 105.30 4.14E5 .000000 A.D. 2050 Aug 19.36602 Merc .046708 .045128 .048330 22.657 283.73 1.21E5 .000000
2005 AY28 http://www.minorplanetcenter.net/mpec/K05/K05B05.html 2006 DP14 http://www.minorplanetcenter.net/mpec/K06/K06D40.html
GOLDSTONE SNRS 2005 AY28 Assumptions: D = 0.15 km, P = 2.1 h, OC albedo = 0.100 SNR/ SNR/ w DOY start date window RA, dec dist runs date run 6 034 2014 Feb 03 03:00-16:01 157, +47 0.055 413 22 1 6 035 2014 Feb 04 02:23-16:27 156, +55 0.049 503 37 2 6 036 2014 Feb 05 01:20-17:38 152, +65 0.044 642 59 3 Scheduled 6 037 2014 Feb 06 01:33-15:35 141, +77 0.041 1068 93 3 Circumpolar; horizons set = 30 deg 6 037-038 2014 Feb 06-07 21:04-11:05 81, +85 0.039 1098 110 3 Circumpolar; horizons set = 30 deg 6 038-039 2014 Feb 07-08 15:18-05:42 7, +78 0.040 1084 99 3 Circumpolar; horizons set = 30 deg 6 039-040 2014 Feb 08-09 13:03-05:47 354, +66 0.042 673 67 3 Scheduled 6 040-041 2014 Feb 09-10 14:30-04:39 350, +55 0.047 524 42 2 7 041-042 2014 Feb 10-11 14:59-03:58 348, +46 0.053 429 25 1 7 041-043 2014 Feb 11-12 15:15-03:312 347, +39 0.060 359 15 1 2006 DP14 Assumptions: D = 0.55 km, P = 2.1 h, OC albedo = 0.1 SNR/ SNR/ w DOY start date window RA, dec dist runs date run 6 037 2014 Feb 06 16:30-22:12 311, -22 0.065 154 45 4 6 038 2014 Feb 07 17:00-21:51 313, -26 0.049 169 110 9 6 039 2014 Feb 08 18:30-20:44 318, -33 0.035 107 270 26 Scheduled ...asteroid is too far south for Goldstone to track from Feb. 9-11... 7 043 2014 Feb 12 02:46-08:28 107, -22 0.028 340 1200 73 Scheduled 7 044 2014 Feb 13 02:08-09:35 113, -11 0.042 306 320 21 Scheduled 7 045 2014 Feb 14 01:54-10:00 116, -6 0.056 249 110 7 7 046 2014 Feb 15 01:46-10:12 118, -2 0.072 206 43 3 Goldstone SNRs assume Ptx = 450 kW - - - - - - - - - - - ARECIBO SNRS 2005 AY28 # SNR/ SNR/ start date window RA, dec dist runs Date run 2014 Jan 28 05:17-08:00 160, 23 0.107 42 15 2 2014 Jan 29 05:14-07:54 160, 25 0.098 45 21 3 2014 Jan 30 05:13-07:45 160, 27 0.089 46 29 5 2014 Jan 31 05:16-07:31 160, 31 0.080 46 41 7 2014 Feb 01 05:27-07:08 159, 34 0.072 38 49 9 ...too far north for Arecibo to track from Feb. 2-11... 2014 Feb 12 17:13-18:51 346, 35 0.066 39 63 11 2014 Feb 13 16:46-19:04 345, 30 0.075 50 55 8 2014 Feb 14 16:32-19:07 345, 27 0.083 50 39 6 2014 Feb 15 16:23-19:05 345, 24 0.092 48 27 4 2014 Feb 16 16:16-19:01 344, 21 0.101 45 19 3 2014 Feb 17 16:11-18:57 344, 19 0.110 42 13 2 2014 Feb 18 16:07-18:51 344, 17 0.119 38 10 2 2006 DP14 # SNR/ SNR/ start date window RA, dec dist runs Date run 2014 Feb 16 02:15-03:01 119, -1 0.085 16 96 25 2014 Feb 17 01:59-03:15 119, +1 0.100 22 72 17 2014 Feb 18 01:50-03:21 120, +2 0.116 23 48 11 2014 Feb 19 01:43-03:24 120, +3 0.132 22 32 8 2014 Feb 20 01:37-03:25 121, +4 0.147 21 22 5 2014 Feb 21 01:32-03:25 121, +4 0.163 20 15 4 2014 Feb 22 01:28-03:24 121, +5 0.179 19 11 3 2006 DP14 is too far south for Arecibo to track during the closest approach. This is one of those uncommon targets that's much stronger at Goldstone. Arecibo SNRs assume Ptx = 900 kW and Tsys = 25 K.
2005 AY28 2006 DP14 SNR/run SNR/run 038 0240 0410 0910 0940 DSS-14 GSSR AST 2005 AY28 3 039 1700 1830 2040 2110 DSS-14 GSSR AST 2006 DP14 26 039 2135 2305 0505 0535 DSS-14 GSSR AST 2005 AY28 3 043 0120 0250 0730 0800 DSS-14 GSSR AST 2006 DP14 73 This might start 10 minutes later due to a possible conflict with LADEE 044 0125 0255 0630 0700 DSS-14 GSSR AST 2006 DP14 21 UT UT PST Duration Round-trip Target DOY Date TX Window TX Window hh:mm time (sec) 2005 AY28 38 Feb 7 0310-0910 1910-0110 Feb 6-7 6:00 44 2006 DP14 39 Feb 8 1830-2040 1030-1240 Feb 8 2:10 35 2005 AY28 39-40 Feb 8-9 2205-0505 1405-2105 Feb 8 7:00 42 2006 DP14 43 Feb 12 0255-0730 1855-2330 Feb 11 4:35 28 2006 DP14 44 Feb 13 0210-0630 1810-2230 Feb 12 4:20 42 Goldstone transmit start times refer to when we have transmit authorization. On most days we can transmit before the end of precal time. Arecibo tracks: UT UT PDT Duration Round-trip SNR/ Target DOY Date TX Window TX Window hh:mm time (sec) Run ...not available yet... Arecibo was damaged on Jan. 13 due to a nearby magnitude 6.4 earthquake. We do not know if Arecibo will be operational again by the time of the 2005 AY28 and 2006 DP14 observations.
2005 AY28 From Jon Giorgini, 2014 Feb 5: For 348306 (2005 AY28), 133 optical measurements (2005-Jan-13 to 2014-Feb-4) were used to estimate orbit solution #33. OSOD and nominal predicts were established on aardvark. Formal 3-sigma X-band uncertainties for s33: Date__(UT)__HR:MN POS_3sigma DOP_X_3sig RT_delay_3sig 2014-Feb-06 00:00 1.727 6.74 0.000405 2014-Feb-07 00:00 2.218 9.61 0.000335 2014-Feb-08 00:00 2.531 11.16 0.000248 2014-Feb-09 00:00 2.566 10.78 0.000170 2014-Feb-10 00:00 2.396 9.22 0.000134 - - - - - - - - - - - - - - - From Horizons, 2014 January 21, Solution 21: # obs: 100 (2005-2014): Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_S_3sig DOP_X_3sig RT_delay_3sig 2014-Jan-20 00:00 * 160.31337 13.47677 0.18938640158250 1.086 0.47 1.69 0.001342 2014-Jan-21 00:00 * 160.37287 14.12493 0.17915183115874 1.163 0.48 1.75 0.001355 2014-Jan-22 00:00 * 160.41870 14.85678 0.16899094329808 1.249 0.50 1.83 0.001369 2014-Jan-23 00:00 * 160.44923 15.68687 0.15890869367115 1.347 0.52 1.91 0.001383 2014-Jan-24 00:00 * 160.46237 16.63341 0.14891130357842 1.458 0.55 2.00 0.001397 2014-Jan-25 00:00 * 160.45544 17.71934 0.13900670740721 1.585 0.58 2.10 0.001411 2014-Jan-26 00:00 * 160.42493 18.97398 0.12920518597569 1.733 0.61 2.22 0.001425 2014-Jan-27 00:00 * 160.36610 20.43531 0.11952027781673 1.905 0.65 2.36 0.001439 2014-Jan-28 00:00 * 160.27244 22.15315 0.10997011580738 2.110 0.70 2.53 0.001452 2014-Jan-29 00:00 * 160.13470 24.19390 0.10057943114869 2.355 0.76 2.76 0.001464 2014-Jan-30 00:00 *m 159.93923 26.64723 0.09138262814768 2.655 0.85 3.09 0.001473 2014-Jan-31 00:00 *m 159.66498 29.63591 0.08242860289127 3.030 1.00 3.62 0.001479 2014-Feb-01 00:00 *m 159.27750 33.32933 0.07378840653190 3.507 1.25 4.53 0.001476 2014-Feb-02 00:00 *m 158.71614 37.96093 0.06556745011701 4.131 1.69 6.16 0.001462 2014-Feb-03 00:00 *m 157.86309 43.84459 0.05792445580191 4.960 2.49 9.03 0.001426 2014-Feb-04 00:00 *m 156.45562 51.37029 0.05109841551629 6.061 3.82 13.87 0.001355 2014-Feb-05 00:00 *m 153.76676 60.91950 0.04543774218713 7.460 5.85 21.28 0.001231 2014-Feb-06 00:00 *m 146.81691 72.54997 0.04140289295071 9.009 8.44 30.67 0.001038 2014-Feb-07 00:00 *m 104.39431 84.23887 0.03947789503526 10.262 10.67 38.79 0.000791 2014-Feb-08 00:00 *m 6.02071 77.77993 0.03995549469615 10.681 11.34 41.20 0.000589 2014-Feb-09 00:00 *m 353.38859 65.21717 0.04274689338287 10.166 10.25 37.26 0.000582 2014-Feb-10 00:00 *m 349.54554 54.35994 0.04744189901531 9.113 8.37 30.41 0.000735 2014-Feb-11 00:00 *m 347.69652 45.64605 0.05354277555210 7.951 6.56 23.84 0.000915 2014-Feb-12 00:00 *m 346.60305 38.80461 0.06063091131808 6.903 5.15 18.70 0.001073 2014-Feb-13 00:00 *m 345.87378 33.42771 0.06840745863100 6.030 4.13 15.01 0.001205 2014-Feb-14 00:00 * 345.34668 29.15249 0.07667321504257 5.322 3.42 12.43 0.001315 2014-Feb-15 00:00 * 344.94272 25.69960 0.08529835278102 4.751 2.93 10.64 0.001409 - - - - - - - - - - - - - - - - - - - - From Horizons, 2013 November 14, Solution 20, # obs: 98 (2005-2012) Date__(UT)__HR:MN R.A._(J2000.0)_DEC. delta POS_3sigma DOP_S_3sig DOP_X_3sig RT_delay_3sig 2014-Jan-20 00:00 * 160.11933 13.55461 0.18938614052726 9.080 2.01 7.29 0.001473 2014-Jan-21 00:00 * 160.17839 14.20289 0.17915160686355 9.674 2.21 8.03 0.001454 2014-Jan-22 00:00 * 160.22374 14.93484 0.16899075945002 10.336 2.44 8.86 0.001436 2014-Jan-23 00:00 * 160.25370 15.76505 0.15890855442739 11.076 2.70 9.80 0.001423 2014-Jan-24 00:00 * 160.26620 16.71170 0.14891121366851 11.909 2.99 10.88 0.001415 2014-Jan-25 00:00 * 160.25852 17.79774 0.13900667226458 12.850 3.34 12.12 0.001415 2014-Jan-26 00:00 * 160.22712 19.05250 0.12920521190779 13.922 3.74 13.58 0.001426 2014-Jan-27 00:00 * 160.16723 20.51394 0.11952037222618 15.151 4.21 15.31 0.001453 2014-Jan-28 00:00 * 160.07228 22.23189 0.10997028747959 16.570 4.78 17.38 0.001499 2014-Jan-29 00:00 * 159.93295 24.27274 0.10057969062294 18.221 5.47 19.88 0.001570 2014-Jan-30 00:00 *m 159.73549 26.72615 0.09138298818648 20.154 6.31 22.94 0.001673 2014-Jan-31 00:00 *m 159.45868 29.71485 0.08242907903700 22.431 7.35 26.70 0.001815 2014-Feb-01 00:00 *m 159.06773 33.40823 0.07378901766791 25.122 8.61 31.28 0.002005 2014-Feb-02 00:00 *m 158.50142 38.03966 0.06556821873905 28.289 10.10 36.72 0.002250 2014-Feb-03 00:00 *m 157.64070 43.92291 0.05792540716079 31.958 11.76 42.74 0.002555 2014-Feb-04 00:00 *m 156.21987 51.44768 0.05109957362821 36.039 13.26 48.20 0.002919 2014-Feb-05 00:00 *m 153.50276 60.99472 0.04543911900193 40.196 13.90 50.52 0.003314 2014-Feb-06 00:00 *m 146.46452 72.61874 0.04140446774001 43.736 12.86 46.75 0.003672 2014-Feb-07 00:00 *m 103.37104 84.25300 0.03947959344226 45.746 11.17 40.58 0.003882 2014-Feb-08 00:00 *m 5.82983 77.69532 0.03995719787308 45.603 12.23 44.44 0.003859 2014-Feb-09 00:00 *m 353.24317 65.13539 0.04274848764848 43.440 14.60 53.05 0.003618 2014-Feb-10 00:00 *m 349.39535 54.28042 0.04744331733013 40.018 15.36 55.81 0.003261 2014-Feb-11 00:00 *m 347.54109 45.56793 0.05354399708144 36.191 14.62 53.12 0.002885 2014-Feb-12 00:00 *m 346.44370 38.72740 0.06063194111055 32.514 13.28 48.26 0.002543 2014-Feb-13 00:00 *m 345.71156 33.35112 0.06840831120649 29.228 11.90 43.26 0.002257 2014-Feb-14 00:00 * 345.18227 29.07634 0.07667390619457 26.384 10.71 38.93 0.002029 2014-Feb-15 00:00 * 344.77661 25.62379 0.08529889650312 23.951 9.75 35.42 0.001859 Circumstances are favorable for optical astrometry before the radar tracks start, so the uncertainties above will probably shrink enough for radar observations. = = = = = = = = = = = = = = = = = = = = 2006 DP14 From Jon Giorgini, 2014 Feb 12: Substantially more optical astrometry was reported (both via MPC DOU and direct emails from G. Hug (H36), T. Felber (G34), and M. Masek (I47). The DSS-14 OSOD set-up was synched to include the 138 optical from 2006-Feb-23 to 2014-Feb-12 along with the 2 delay and 1 Doppler to estimate orbit solution #34. Formal 3-sigma X-band uncertainties at 1 hour intervals when above 15 degrees elevations at DSS-14: Date__(UT)__HR:MN POS_3sigma DOP_X_3sig RT_delay_3sig >..... Elevation Cut-off Requested .....< 2014-Feb-13 02:00 0.284 1.21 0.000011 2014-Feb-13 03:00 0.280 1.20 0.000011 2014-Feb-13 04:00 0.277 1.19 0.000012 2014-Feb-13 05:00 0.274 1.18 0.000012 2014-Feb-13 06:00 0.271 1.18 0.000013 2014-Feb-13 07:00 0.269 1.17 0.000013 2014-Feb-13 08:00 0.266 1.16 0.000014 2014-Feb-13 09:00 0.263 1.16 0.000014 2014-Feb-13 10:00 0.261 1.15 0.000014 - - - - - - - - - - - From Jon Giorgini, later on 2014 Feb 11: More optical data was emailed by Kevin Hills et al. at Moorook (D90), in addition to that reported yesterday from Cristovao Jacques et al. at SONEAR (Y00). Based on 81 optical measurements spanning 2006-Feb-23 to 2014-Feb-11, orbit solution #24 was computed and OSOD updated on aardvark: Formal 3-sigma X-band uncertainties for s24: Date__(UT)__HR:MN POS_3sigma DOP_X_3sig RT_delay_3sig >..... Elevation Cut-off Requested .....< 2014-Feb-12 03:00 1.989 8.96 0.000279 2014-Feb-12 04:00 1.980 8.76 0.000276 2014-Feb-12 05:00 1.970 8.57 0.000273 2014-Feb-12 06:00 1.958 8.38 0.000269 2014-Feb-12 07:00 1.946 8.20 0.000266 2014-Feb-12 08:00 1.932 8.02 0.000263 2014-Feb-12 09:00 1.917 7.84 0.000260 >..... Elevation Cut-off Requested .....< 2014-Feb-13 02:00 1.629 5.01 0.000218 2014-Feb-13 03:00 1.613 4.88 0.000217 2014-Feb-13 04:00 1.596 4.76 0.000215 2014-Feb-13 05:00 1.579 4.65 0.000213 2014-Feb-13 06:00 1.563 4.55 0.000211 2014-Feb-13 07:00 1.547 4.45 0.000210 2014-Feb-13 08:00 1.530 4.37 0.000208 2014-Feb-13 09:00 1.514 4.28 0.000207 2014-Feb-13 10:00 1.498 4.20 0.000205 - - - - - - - - - - - - - - - From Jon Giorgini, 2014 Feb 11: Yes, new data on 2006 DP14 ... now with 76 optical measurements 2006-Feb-23 to 2014-Feb-11, orbit solution #22 was computed. Predicts and OSOD have been updated on aardvark. Pointing knowledge is sufficient such that no search is necessary. Formal 3-sigma X-band uncertainties for s22: Date__(UT)__HR:MN POS_3sigma DOP_X_3sig RT_delay_3sig >..... Elevation Cut-off Requested .....< 2014-Feb-12 03:00 2.221 10.02 0.000308 2014-Feb-12 04:00 2.212 9.80 0.000304 2014-Feb-12 05:00 2.200 9.58 0.000300 2014-Feb-12 06:00 2.187 9.37 0.000297 2014-Feb-12 07:00 2.173 9.16 0.000293 2014-Feb-12 08:00 2.157 8.96 0.000290 2014-Feb-12 09:00 2.141 8.76 0.000286 >..... Elevation Cut-off Requested .....< 2014-Feb-13 02:00 1.817 5.58 0.000239 2014-Feb-13 03:00 1.799 5.43 0.000237 2014-Feb-13 04:00 1.780 5.30 0.000235 2014-Feb-13 05:00 1.761 5.17 0.000233 2014-Feb-13 06:00 1.743 5.05 0.000231 2014-Feb-13 07:00 1.724 4.95 0.000229 2014-Feb-13 08:00 1.706 4.85 0.000228 2014-Feb-13 09:00 1.688 4.75 0.000226 2014-Feb-13 10:00 1.670 4.66 0.000224 - - - - - - - - - - - - - - - From Jon Giorgini, 2014 Feb 5: For 2006 DP14, 65 optical measurements (2006-Feb-23 to 2011-Mar-5) were used to estimate orbit solution #20. OSOD with nominal predicts has been established on aardvark in the /2006dp104 sub-directory. As you mentioned, uncertainty is too large to guarantee pointing accuracy. The plane-of-sky error ellipse is long and thin, the 3-sigma minor axis not exceeding +/- 11 arcseconds, so stepping along the major axis might find the object. The table below gives the error ellipse dimensions and orientation angle as "theta", where theta is the clockwise angle from the direction of increasing RA (east) to the semi-major axis of the error ellipse, in the direction of increasing DEC (north) in degrees. So for the first day, Feb 8, the ellipse orientation is ~40 degrees, which would look about like this on a skychart (where X is nominal): N . | . | theta . | E ---------------X------------- W | . | . | . S On the other two days, the ellipse lays more nearly along a line of constant declination (so varies mostly in RA), with only 2 and 5 degree orientation angles. Formal 3-sigma X-band uncertainties for s20, at 1 hour intervals when above 15 degrees elevation as seen at DSS-14, are given below: Date__(UT)__HR:MN POS_3sigma DOP_X_3sig RT_delay_3sig SMAA_3sig SMIA_3sig Theta Area_3sig RA_3sigma DEC_3sigma >..... Elevation Cut-off Requested .....< 2014-Feb-08 18:00 252.136 200.69 0.030048 252.024 7.508 39.359 11888.35 194.919 159.934 2014-Feb-08 19:00 256.479 208.62 0.029963 256.363 7.729 39.826 12449.50 196.948 164.296 2014-Feb-08 20:00 260.948 215.54 0.029875 260.826 7.959 40.308 13043.00 198.968 168.836 2014-Feb-08 21:00 265.543 221.55 0.029784 265.416 8.198 40.808 13671.00 200.967 173.566 >..... Elevation Cut-off Requested .....< 2014-Feb-12 03:00 380.705 752.91 0.015917 380.559 10.512 -2.051 25136.16 380.316 17.202 2014-Feb-12 04:00 372.392 707.86 0.016220 372.254 10.131 -2.138 23695.36 371.995 17.186 2014-Feb-12 05:00 364.321 667.65 0.016506 364.190 9.765 -2.236 22345.37 363.913 17.235 2014-Feb-12 06:00 356.484 632.11 0.016775 356.360 9.415 -2.342 21080.40 356.062 17.338 2014-Feb-12 07:00 348.876 600.92 0.017031 348.758 9.079 -2.456 19895.18 348.437 17.484 2014-Feb-12 08:00 341.490 573.62 0.017275 341.378 8.758 -2.576 18784.89 341.033 17.661 2014-Feb-12 09:00 334.324 549.66 0.017508 334.217 8.450 -2.700 17745.09 333.847 17.862 >..... Elevation Cut-off Requested .....< 2014-Feb-13 02:00 242.844 225.15 0.020258 242.795 4.916 -4.957 7499.15 241.887 21.544 2014-Feb-13 03:00 238.904 209.35 0.020348 238.856 4.780 -5.090 7173.56 237.914 21.718 2014-Feb-13 04:00 235.071 195.54 0.020432 235.025 4.649 -5.221 6865.52 234.050 21.883 2014-Feb-13 05:00 231.338 183.83 0.020510 231.294 4.523 -5.352 6573.80 230.286 22.037 2014-Feb-13 06:00 227.701 174.24 0.020585 227.659 4.402 -5.481 6297.27 226.618 22.181 2014-Feb-13 07:00 224.154 166.68 0.020655 224.113 4.286 -5.608 6034.98 223.041 22.314 2014-Feb-13 08:00 220.694 160.96 0.020723 220.655 4.173 -5.734 5786.07 219.551 22.435 2014-Feb-13 09:00 217.318 156.80 0.020789 217.280 4.065 -5.859 5549.80 216.145 22.545 2014-Feb-13 10:00 214.024 153.87 0.020853 213.987 3.961 -5.981 5325.51 212.823 22.643 >..... Elevation Cut-off Requested .....< - - - - - - - - -- - - - - - - - From Horizons, 2013 November 14, Solution 18, # obs: 65 (2006-2011) Date__(UT)__HR:MN R.A._(J2000.0)_DEC. delta POS_3sigma DOP_S_3sig DOP_X_3sig RT_delay_3sig 2014-Jan-15 00:00 * 304.92875 -12.24374 0.46674087510670 13.266 46.79 170.04 0.046054 2014-Jan-16 00:00 * 305.01259 -12.16228 0.44516138635097 14.107 44.59 162.05 0.044404 2014-Jan-17 00:00 * 305.08113 -12.10222 0.42418755745739 14.975 42.47 154.37 0.042832 2014-Jan-18 00:00 * 305.13755 -12.06313 0.40377194910630 15.877 40.45 147.03 0.041335 2014-Jan-19 00:00 * 305.18481 -12.04479 0.38386979785747 16.822 38.53 140.03 0.039911 2014-Jan-20 00:00 * 305.22569 -12.04723 0.36443902699009 17.818 36.70 133.38 0.038555 2014-Jan-21 00:00 * 305.26287 -12.07075 0.34544019790139 18.877 34.96 127.08 0.037263 2014-Jan-22 00:00 * 305.29897 -12.11597 0.32683642543146 20.009 33.32 121.10 0.036034 2014-Jan-23 00:00 * 305.33659 -12.18391 0.30859327377937 21.230 31.76 115.43 0.034863 2014-Jan-24 00:00 * 305.37842 -12.27603 0.29067864463543 22.557 30.28 110.05 0.033747 2014-Jan-25 00:00 * 305.42731 -12.39439 0.27306266572525 24.011 28.87 104.94 0.032684 2014-Jan-26 00:00 * 305.48634 -12.54177 0.25571758788062 25.618 27.53 100.07 0.031671 2014-Jan-27 00:00 * 305.55902 -12.72195 0.23861770212916 27.411 26.26 95.44 0.030705 2014-Jan-28 00:00 * 305.64944 -12.93998 0.22173929004983 29.433 25.04 91.00 0.029786 2014-Jan-29 00:00 * 305.76261 -13.20271 0.20506061832838 31.739 23.87 86.75 0.028909 2014-Jan-30 00:00 *m 305.90481 -13.51949 0.18856198702506 34.402 22.74 82.65 0.028075 2014-Jan-31 00:00 *m 306.08434 -13.90331 0.17222584603758 37.521 21.65 78.69 0.027282 2014-Feb-01 00:00 *m 306.31258 -14.37255 0.15603701213254 41.235 20.59 74.84 0.026527 2014-Feb-02 00:00 *m 306.60583 -14.95400 0.13998306280392 45.745 19.56 71.08 0.025812 2014-Feb-03 00:00 *m 306.98857 -15.68799 0.12405507774087 51.349 18.55 67.41 0.025133 2014-Feb-04 00:00 *m 307.49968 -16.63797 0.10824910233914 58.514 17.57 63.86 0.024491 2014-Feb-05 00:00 *m 308.20502 -17.90931 0.09256919343041 68.012 16.68 60.63 0.023884 2014-Feb-06 00:00 *m 309.22617 -19.68974 0.07703423415817 81.214 16.08 58.44 0.023305 2014-Feb-07 00:00 *m 310.81500 -22.34597 0.06169489278076 100.798 16.51 60.02 0.022734 2014-Feb-08 00:00 *m 313.59051 -26.68737 0.04668284790805 132.711 21.22 77.11 0.022088 2014-Feb-09 00:00 *m 319.56334 -34.79252 0.03238872557010 192.701 47.87 173.99 0.020981 2014-Feb-10 00:00 *m 339.86356 -51.97348 0.02030842879214 326.307 215.18 782.05 0.017063 2014-Feb-11 00:00 *m 69.33784 -55.68113 0.01635873330221 452.576 521.62 1895.79 0.002052 2014-Feb-12 00:00 *m 103.65126 -26.40910 0.02477241538421 281.415 179.02 650.63 0.010895 2014-Feb-13 00:00 *m 111.71361 -12.92440 0.03808778127364 172.841 50.97 185.26 0.014557 2014-Feb-14 00:00 * 115.13392 -6.54745 0.05272199074136 120.995 15.79 57.38 0.015650 2014-Feb-15 00:00 * 117.02255 -2.95301 0.06784005238468 92.155 3.23 11.74 0.015959 2014-Feb-16 00:00 * 118.22728 -0.66606 0.08319397605346 74.030 2.38 8.65 0.015962 2014-Feb-17 00:00 * 119.07036 0.91329 0.09869020966019 61.641 5.03 18.28 0.015825 2014-Feb-18 00:00 * 119.70055 2.06927 0.11428787840125 52.655 6.43 23.37 0.015618 Additional optical astrometry is unlikely before the radar tracks start and pointing may be a problem for the first Goldstone track on February 8. ********************************************************************************************** Apparent Magnitudes, Solar Elongations, Lunar Elongations, and Lunar Illumination: 2005 AY28 Date__(UT)__HR:MN R.A._(J2000.0)_DEC. delta APmag S-O-T /r T-O-M/Illu% 2014-Jan-01 00:00 157.31880 8.70162 0.39465583528658 21.56 124.4747 /L 117.8/ 0.5 2014-Jan-02 00:00 157.52718 8.77460 0.38342850544483 21.48 125.3305 /L 132.8/ 0.6 2014-Jan-03 00:00 157.72971 8.85922 0.37223900593044 21.40 126.1960 /L 147.8/ 3.8 2014-Jan-04 00:00 157.92627 8.95632 0.36108932022947 21.31 127.0715 /L 162.5/ 9.7 2014-Jan-05 00:00 158.11674 9.06688 0.34998128213497 21.23 127.9573 /L 175.1/ 17.8 2014-Jan-06 00:00 158.30102 9.19194 0.33891657247722 21.14 128.8538 /L 167.6/ 27.5 2014-Jan-07 00:00 158.47899 9.33269 0.32789673635652 21.04 129.7614 /L 154.3/ 37.9 2014-Jan-08 00:00 158.65051 9.49046 0.31692321207188 20.95 130.6805 /L 141.1/ 48.5 2014-Jan-09 00:00 158.81543 9.66676 0.30599736325774 20.85 131.6117 /L 128.3/ 58.9 2014-Jan-10 00:00 158.97358 9.86330 0.29512050918527 20.75 132.5555 /L 115.8/ 68.6 2014-Jan-11 00:00 159.12474 10.08202 0.28429395184107 20.65 133.5124 /L 103.5/ 77.3 2014-Jan-12 00:00 159.26868 10.32514 0.27351900081402 20.54 134.4831 /L 91.4/ 84.9 2014-Jan-13 00:00 159.40513 10.59523 0.26279699811784 20.43 135.4681 /L 79.5/ 91.0 2014-Jan-14 00:00 159.53377 10.89523 0.25212934533970 20.31 136.4683 /L 67.7/ 95.6 2014-Jan-15 00:00 159.65422 11.22858 0.24151753540907 20.19 137.4843 /L 55.9/ 98.6 2014-Jan-16 00:00 159.76606 11.59929 0.23096319120769 20.06 138.5167 /L 44.3/ 99.8 2014-Jan-17 00:00 159.86875 12.01205 0.22046811339117 19.94 139.5663 /L 32.7/ 99.2 2014-Jan-18 00:00 159.96169 12.47246 0.21003434035567 19.80 140.6335 /L 21.4/ 97.0 2014-Jan-19 00:00 160.04415 12.98715 0.19966422441244 19.66 141.7188 /L 11.6/ 93.0 2014-Jan-20 00:00 160.11525 13.56411 0.18936053005579 19.51 142.8220 /L 9.865/ 87.4 2014-Jan-21 00:00 160.17390 14.21301 0.17912656293536 19.36 143.9425 /L 19.0/ 80.4 2014-Jan-22 00:00 160.21877 14.94566 0.16896634204585 19.20 145.0788 /L 30.6/ 72.1 2014-Jan-23 00:00 160.24821 15.77665 0.15888483327762 19.03 146.2275 /L 43.0/ 62.7 2014-Jan-24 00:00 160.26009 16.72421 0.14888827078148 18.85 147.3830 /L 55.9/ 52.5 2014-Jan-25 00:00 160.25171 17.81128 0.13898460530223 18.67 148.5352 /L 69.3/ 41.8 2014-Jan-26 00:00 160.21947 19.06724 0.12918413875164 18.47 149.6676 /L 83.1/ 31.2 2014-Jan-27 00:00 160.15860 20.53008 0.11950043723605 18.26 150.7524 /L 97.3/ 21.2 2014-Jan-28 00:00 160.06247 22.24967 0.10995167018460 18.05 151.7445 /L 111.8/ 12.5 2014-Jan-29 00:00 159.92169 24.29246 0.10056261792993 17.82 152.5700 /L 126.3/ 5.7 2014-Jan-30 00:00 159.72242 26.74818 0.09136775166350 17.59 153.1105 /L 139.8/ 1.5 2014-Jan-31 00:00 159.44325 29.73966 0.08241605936717 17.35 153.1809 /L 150.2/ 0.2 2014-Feb-01 00:00 159.04916 33.43633 0.07377871859464 17.12 152.5061 /L 152.7/ 2.0 2014-Feb-02 00:00 158.47841 38.07161 0.06556131133912 16.90 150.7072 /L 145.2/ 6.6 2014-Feb-03 00:00 157.61100 43.95911 0.05792277774820 16.72 147.3135 /L 131.8/ 13.6 2014-Feb-04 00:00 156.17893 51.48794 0.05110234393183 16.58 141.8113 /L 115.9/ 22.2 2014-Feb-05 00:00 153.43925 61.03710 0.04544854780032 16.53 133.7483 /L 99.2/ 31.8 2014-Feb-06 00:00 146.33634 72.65682 0.04142156845995 16.61 122.9656 /L 83.2/ 41.9 2014-Feb-07 00:00 102.87024 84.25059 0.03950442010662 16.87 109.9878 /T 70.5/ 52.1 2014-Feb-08 00:00 5.89064 77.65574 0.03998834472815 17.34 96.2075 /T 65.2/ 61.8 2014-Feb-09 00:00 353.29634 65.11208 0.04278360129783 17.98 83.2937 /T 68.7/ 70.9 2014-Feb-10 00:00 349.43508 54.26925 0.04748019263535 18.71 72.2766 /T 78.4/ 79.1 2014-Feb-11 00:00 347.57261 45.56488 0.05358115534554 19.47 63.3345 /T 90.8/ 86.2 2014-Feb-12 00:00 346.46990 38.72936 0.06066857468192 20. 56.1768 /T 104.0/ 92.0 2014-Feb-13 00:00 345.73405 33.35603 0.06844403711155 21. 50.4054 /T 117.1/ 96.2 2014-Feb-14 00:00 345.20205 29.08291 0.07670856910451 22. 45.6710 /T 129.7/ 98.9 2014-Feb-15 00:00 344.79431 25.63125 0.08533245303423 22. 41.7070 /T 141.6/ 99.8 2014-Feb-16 00:00 344.46749 22.79675 0.09423139771030 23. 38.3196 /T 151.7/ 98.9 2014-Feb-17 00:00 344.19607 20.43161 0.10335057325356 23. 35.3698 /T 158.0/ 96.2 2006 DP14 Prior to 2014 February 10, this object will be too close to the Sun for optical astrometry. Date__(UT)__HR:MN R.A._(J2000.0)_DEC. delta APmag S-O-T /r T-O-M/Illu% 2014-Jan-25 00:00 305.43390 -12.38862 0.27307351821963 33. 6.8746 /L 80.4/ 41.8 2014-Jan-26 00:00 305.49344 -12.53563 0.25572788404126 33. 6.7841 /L 66.8/ 31.2 2014-Jan-27 00:00 305.56669 -12.71538 0.23862742999445 33. 6.8065 /L 52.6/ 21.2 2014-Jan-28 00:00 305.65777 -12.93293 0.22174843788161 33. 6.9349 /L 38.1/ 12.5 2014-Jan-29 00:00 305.77169 -13.19511 0.20506917430874 33. 7.1562 /L 23.2/ 5.7 2014-Jan-30 00:00 305.91476 -13.51125 0.18856993885349 33. 7.4530 /L 8.065/ 1.5 2014-Jan-31 00:00 306.09532 -13.89430 0.17223318037651 32. 7.8062 /L 7.160/ 0.2 2014-Feb-01 00:00 306.32479 -14.36262 0.15604371381273 32. 8.1962 /L 22.2/ 2.0 2014-Feb-02 00:00 306.61954 -14.94294 0.13998911362975 31. 8.6054 /L 37.0/ 6.6 2014-Feb-03 00:00 307.00416 -15.67552 0.12406045459299 31. 9.0193 /L 51.3/ 13.6 2014-Feb-04 00:00 307.51769 -16.62368 0.10825377396781 30. 9.4323 /L 65.1/ 22.2 2014-Feb-05 00:00 308.22627 -17.89257 0.09257311466218 29. 9.8619 /L 78.3/ 31.8 2014-Feb-06 00:00 309.25196 -19.66954 0.07703733449186 29. 10.3933 /L 90.9/ 41.9 2014-Feb-07 00:00 310.84766 -22.32052 0.06169705158465 28. 11.3193 /L 102.7/ 52.1 2014-Feb-08 00:00 313.63463 -26.65307 0.04668383323552 26. 13.5791 /L 113.1/ 61.8 2014-Feb-09 00:00 319.62973 -34.74055 0.03238802191543 22. 20.0645 /L 120.2/ 70.9 2014-Feb-10 00:00 339.97216 -51.87421 0.02030482281539 17. 39.6640 /T 115.1/ 79.1 2014-Feb-11 00:00 69.18411 -55.56189 0.01635229324032 13.12 86.4671 /T 78.2/ 86.2 2014-Feb-12 00:00 103.56309 -26.35127 0.02476760523537 12.80 122.8667 /T 44.0/ 92.0 2014-Feb-13 00:00 111.66001 -12.88757 0.03808476742559 13.37 136.6842 /T 29.9/ 96.2 2014-Feb-14 00:00 115.09585 -6.52083 0.05272023940604 13.94 142.4438 /T 27.1/ 98.9 2014-Feb-15 00:00 116.99311 -2.93229 0.06783928795703 14.43 145.1751 /T 31.8/ 99.8 2014-Feb-16 00:00 118.20331 -0.64916 0.08319405494185 14.85 146.5195 /T 40.4/ 98.9 2014-Feb-17 00:00 119.05014 0.92753 0.09869104923375 15.22 147.1296 /T 50.8/ 96.2 2014-Feb-18 00:00 119.68308 2.08156 0.11428942666678 15.55 147.3093 /T 62.1/ 91.6 2014-Feb-19 00:00 120.18056 2.96344 0.12996987474918 15.85 147.2174 /T 73.9/ 85.3 2014-Feb-20 00:00 120.58766 3.66008 0.14572306100710 16.12 146.9444 /T 86.0/ 77.4 2014-Feb-21 00:00 120.93214 4.22501 0.16154469663073 16.37 146.5454 /T 98.6/ 68.2 2014-Feb-22 00:00 121.23201 4.69296 0.17743319109923 16.60 146.0560 /T 111.5/ 57.9 2014-Feb-23 00:00 121.49949 5.08738 0.19338844038905 16.82 145.4999 /T 124.6/ 47.0 2014-Feb-24 00:00 121.74314 5.42470 0.20941115477529 17.02 144.8936 /T 138.1/ 35.9 2014-Feb-25 00:00 121.96914 5.71673 0.22550246052270 17.21 144.2491 /T 151.8/ 25.3 2014-Feb-26 00:00 122.18208 5.97217 0.24166364832777 17.39 143.5749 /T 164.8/ 15.8 2014-Feb-27 00:00 122.38542 6.19759 0.25789600612381 17.56 142.8778 /T 171.2/ 8.1 2014-Feb-28 00:00 122.58180 6.39800 0.27420070724635 17.72 142.1628 /T 161.1/ 2.8
We're going to start with the following setup, which should produce an echo relatively quickly, and then we'll do ranging measurements. Then we'll decide what to do next based on the SNRs. CW setup: --------------------------------------------------------------------------- TX polarization RCP RCV polarization LCP & RCP Frequency hops: 2 Dwell 20 seconds Bandwidth: 4000 Hz Sampling interval: 1250 x 0.1 usec FFT for PFS files: 4096 for 0.98 Hz resolution Ranging setups: --------------------------------------------------------------------------- 10-usec baud 10 usec code 127 PRP 1270 usec FFT 128 ncoh 1 bandwidth 787 Hz resolution 12.3 Hz TXOFF +100Hz (echo in bin 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 bin 32 + 9= 41) ------------------------------------------------------------------------- _____________________________________________________________________ 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 will be on aardvark: ...not available yet... POINTING TX Offsets Date (UTC) DOY hhmmss RA Dec Macro LHA Dec RTT OSOD ... to be added ... Transmit offsets are given in millidegrees.
PRDX.OUT.14f-14-14.?? TRANSMITTER: STATION #14, RECEIVER: STATION #14 RECEIVER U.T. RANGE DOPPLER LHA DEC RA EL
2005 AY28 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 http://echo.jpl.nasa.gov/asteroids/2006DP14/2006DP14_planning.html