Goldstone Radar Observations Planning: (285944) 2001 RZ11
2001 RZ11 was discovered by LINEAR on 2001 Sep. 10. This object has an absolute magnitude of 16.4, which suggests a diameter within a factor of two of 1.7 km, but otherwise nothing is known about its physical properties. This asteroid will approach within 0.088 AU (34 lunar distances) on August 17 when it will be a moderately strong radar target. We expect SNRs that will be strong enough for CW and ranging observations but probably not for imaging. The rotation period and pole direction are unknown, but the asteroid will be bright enough for lightcurves before the radar observations start, so the rotation period may be measured soon. This object should reach about 12th magnitude and be a good target for spectroscopy. The asteroid will approach from the south and the best opportunities for lightcurves and spectroscopy will be from telescopes in the southern hemisphere. Observations at Goldstone are scheduled on one day: August 18. Observations are scheduled at Arecibo from August 21 - 24.
Orbital and Physical Characteristics Provisional Designation 2001 RZ11 Asteroid number 285944 Discoverer LINEAR Discovery date 2001 Sep. 10 orbit type Amor Close approach dist. 0.088 AU Close approach dist. 34.2 lunar distances Close approach date 2014 Aug 17 semimajor axis 2.191 AU eccentricity 0.508 inclination 54.1 deg perihelion distance 1.079 AU aphelion distance 3.304 AU Tisserand parameter absolute magnitude (H) 16.4 diameter 1.7 km +- a factor of two Detected by NEOWISE optical albedo unknown rotation period unknown pole direction unknown lightcurve amplitude unknown spectral class unknown Last update: 2014 Aug 14
2001 RZ11 http://www.minorplanetcenter.net/mpec/K01/K01R31.html
GOLDSTONE SNRS Assumptions: D = 1.7 km, P = 2.1 h, OC radar albedo = 0.1 w DOY start date window RA, dec dist runs SNR/day SNR/run 33 229 2014 Aug 17 05:18-09:56 321, -26 0.088 88 60 7 34 230 2014 Aug 18 03:56-10:19 315, -17 0.090 118 72 7 Scheduled 34 231 2014 Aug 19 02:54-10:29 310, -9 0.095 133 68 6 34 232 2014 Aug 20 02:06-10:33 305, -1 0.103 138 54 5 34 233 2014 Aug 21 01:28-10:33 302, 5 0.112 136 40 4 34 234 2014 Aug 22 00:56-10:32 299, 10 0.124 107 26 3 34 235 2014 Aug 23 00:30-10:29 296, 15 0.136 104 18 2 This object is too far south for Goldstone prior to August 17. Goldstone SNRs assume Ptx = 440 kW ARECIBO SNRS start date window RA, dec dist runs SNR/day SNR/run 2014 Aug 21 01:44-03:36 302, 4 0.111 28 380 79 Scheduled 2014 Aug 22 01:11-03:36 299, 10 0.122 27 280 57 Scheduled 2014 Aug 23 00:49-03:28 296, 14 0.134 28 210 41 Scheduled 2014 Aug 24 00:33-03:18 294, 18 0.147 26 140 29 Scheduled 2014 Aug 25 00:21-03:06 292, 21 0.161 25 100 21 2014 Aug 26 00:12-02:54 291, 23 0.176 23 73 16 2014 Aug 27 00:04-02:42 289, 25 0.191 21 52 12 2014 Aug 27 23:58-02:31 288, 27 0.206 19 38 9 2014 Aug 28 23:53-02:19 287, 28 0.221 17 28 7 2014 Aug 29 23:48-02:09 286, 30 0.237 15 20 6 2014 Aug 30 23:44-01:58 285, 31 0.252 13 15 4 2014 Aug 31 23:41-01:48 284, 32 0.268 12 12 4 Before Aug. 21, 2001 RZ11 will be too far south for Arecibo to track. Arecibo SNRs assume Ptx = 400 kW and Tsys = 25 K.
Track Assignments
DOY BOA BOT EOT EOA 230 0630 0800 1000 1030 DSS-14 GSSR AST 2001 RZ11 Goldstone tracks: UT UT PDT Duration Round-trip DOY Date TX Window TX Window hh:mm time (sec) 230 Aug 18 0700-1000 0000-0300 Aug 18 3:00 90 The start time is when we can begin to transmit, which is only 30 minutes after we get the telescope. Arecibo tracks: UT UT PDT Round-trip Date TX Window TX Window time (sec) 2014 Aug 21 0144-0336 1844-2036 Aug 20 111 2014 Aug 22 0111-0336 1811-2036 Aug 21 122 2014 Aug 23 0049-0328 1749-2028 Aug 22 134 2014 Aug 24 0033-0318 1733-2018 Aug 23 147
Uncertainties
JPL/Horizons solution 52, # obs = 286 (2001-2014) Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_S_3sig DOP_X_3sig RT_delay_3sig 2014-Aug-15 00:00 * 340.09440 -44.94501 0.09516336694878 0.835 1.43 5.20 0.000652 2014-Aug-16 00:00 * 331.17070 -37.52607 0.09003956682465 1.050 1.95 7.07 0.000605 2014-Aug-17 00:00 * 323.36990 -28.86765 0.08796127166233 1.259 2.43 8.85 0.000540 2014-Aug-18 00:00 * 316.73880 -19.72807 0.08915118698605 1.408 2.71 9.84 0.000464 2014-Aug-19 00:00 * 311.18409 -10.93123 0.09349090928877 1.467 2.68 9.76 0.000390 2014-Aug-20 00:00 * 306.55489 -3.06343 0.10057690335998 1.444 2.43 8.83 0.000329 2014-Aug-21 00:00 * 302.69370 3.63423 0.10987997360767 1.369 2.07 7.53 0.000289 2014-Aug-22 00:00 * 299.45942 9.18109 0.12088807958386 1.272 1.71 6.22 0.000271 2014-Aug-23 00:00 *m 296.73424 13.72279 0.13317610713686 1.171 1.40 5.09 0.000270 2014-Aug-24 00:00 *m 294.42301 17.43709 0.14641780434518 1.077 1.15 4.18 0.000279 2014-Aug-25 00:00 *m 292.45006 20.48880 0.16037165172290 0.992 0.96 3.49 0.000294 2014-Aug-26 00:00 *m 290.75546 23.01517 0.17486089209531 0.918 0.82 2.99 0.000311 2014-Aug-27 00:00 *m 289.29171 25.12517 0.18975585589763 0.855 0.72 2.63 0.000329 --> Pointing won't be any problem. - - - - - - - - - JPL/Horizons solution 46, #obs: 186 (2001-2014): Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_S_3sig DOP_X_3sig RT_delay_3sig 2014-Aug-15 00:00 * 340.09408 -44.94470 0.09516327717647 8.129 8.13 29.54 0.001628 2014-Aug-16 00:00 * 331.17045 -37.52573 0.09003958461632 8.823 10.00 36.34 0.001375 2014-Aug-17 00:00 * 323.36970 -28.86729 0.08796140357796 9.235 11.25 40.89 0.001104 2014-Aug-18 00:00 * 316.73865 -19.72773 0.08915142762600 9.239 11.37 41.34 0.000887 2014-Aug-19 00:00 * 311.18397 -10.93093 0.09349124240999 8.848 10.39 37.76 0.000809 2014-Aug-20 00:00 * 306.55481 -3.06319 0.10057730770245 8.197 8.78 31.92 0.000875 2014-Aug-21 00:00 * 302.69364 3.63443 0.10988042880860 7.444 7.07 25.70 0.001006 2014-Aug-22 00:00 * 299.45938 9.18124 0.12088856918561 6.703 5.55 20.18 0.001143 2014-Aug-23 00:00 *m 296.73421 13.72291 0.13317661901440 6.028 4.33 15.72 0.001261 2014-Aug-24 00:00 *m 294.42299 17.43719 0.14641832996463 5.437 3.38 12.27 0.001358 2014-Aug-25 00:00 *m 292.45005 20.48888 0.16037218518379 4.928 2.65 9.65 0.001434 2014-Aug-26 00:00 *m 290.75545 23.01524 0.17486142932540 4.493 2.11 7.67 0.001494 2014-Aug-27 00:00 *m 289.29171 25.12522 0.18975639406715 4.119 1.70 6.18 0.001541 ********************************************************************************************** Apparent Magnitudes, Solar Elongations, Lunar Elongations, and Lunar Illumination: JPL/Horizons solution 45 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta APmag S-O-T /r T-O-M/Illu% 2014-Jul-25 00:00 67.90154 -55.14172 0.39301538095848 16.99 88.7771 /L 78.5/ 3.6 2014-Jul-26 00:00 67.14627 -55.36756 0.37765347212692 16.91 89.5119 /L 81.9/ 1.0 2014-Jul-27 00:00 66.30581 -55.61197 0.36223232430631 16.82 90.2981 /L 85.7/ 0.2 2014-Jul-28 00:00 65.36651 -55.87619 0.34676116324517 16.73 91.1424 /L 89.8/ 1.2 2014-Jul-29 00:00 64.31179 -56.16140 0.33125031675332 16.63 92.0524 /L 93.9/ 3.9 2014-Jul-30 00:00 63.12142 -56.46865 0.31571146634836 16.52 93.0373 /L 97.9/ 8.3 2014-Jul-31 00:00 61.77045 -56.79866 0.30015797785137 16.40 94.1082 /L 101.4/ 14.3 2014-Aug-01 00:00 60.22795 -57.15157 0.28460533969025 16.28 95.2788 /L 104.4/ 21.6 2014-Aug-02 00:00 58.45530 -57.52648 0.26907174967498 16.14 96.5654 /L 106.5/ 30.1 2014-Aug-03 00:00 56.40392 -57.92077 0.25357890877292 16.00 97.9884 /L 107.5/ 39.6 2014-Aug-04 00:00 54.01257 -58.32894 0.23815310696790 15.84 99.5734 /L 107.1/ 49.8 2014-Aug-05 00:00 51.20390 -58.74074 0.22282672623060 15.67 101.3520 /L 105.1/ 60.3 2014-Aug-06 00:00 47.88075 -59.13822 0.20764034574367 15.48 103.3645 /L 101.3/ 70.6 2014-Aug-07 00:00 43.92310 -59.49092 0.19264572419126 15.28 105.6621 /L 96.0/ 80.3 2014-Aug-08 00:00 39.18786 -59.74839 0.17791006418427 15.05 108.3107 /L 89.1/ 88.7 2014-Aug-09 00:00 33.51674 -59.82882 0.16352214176696 14.81 111.3945 /L 81.1/ 95.1 2014-Aug-10 00:00 26.76136 -59.60336 0.14960109250858 14.54 115.0212 /L 72.6/ 98.9 2014-Aug-11 00:00 18.83712 -58.87789 0.13630878541037 14.24 119.3264 /L 64.3/ 99.8 2014-Aug-12 00:00 9.80808 -57.38052 0.12386645171247 13.91 124.4730 /L 57.6/ 97.5 2014-Aug-13 00:00 359.96977 -54.77242 0.11257466427184 13.56 130.6385 /L 54.3/ 92.5 2014-Aug-14 00:00 349.85036 -50.70608 0.10283096274075 13.19 137.9699 /L 56.2/ 85.1 2014-Aug-15 00:00 340.07269 -44.94455 0.09512897682026 12.81 146.4720 /L 63.7/ 76.1 2014-Aug-16 00:00 331.14724 -37.52093 0.09000933971854 12.44 155.7594 /L 75.9/ 66.0 2014-Aug-17 00:00 323.34622 -28.85800 0.08793672509787 12.13 164.3997 /T 90.9/ 55.5 2014-Aug-18 00:00 316.71596 -19.71522 0.08913340180077 12.05 167.9579 /T 107.1/ 45.2 2014-Aug-19 00:00 311.16262 -10.91699 0.09348019952732 12.31 163.2127 /T 122.9/ 35.3 2014-Aug-20 00:00 306.53501 -3.04938 0.10057286091479 12.70 155.7102 /T 136.8/ 26.2 2014-Aug-21 00:00 302.67543 3.64716 0.10988177706602 13.08 148.5019 /T 147.3/ 18.2 2014-Aug-22 00:00 299.44268 9.19251 0.12089480170621 13.45 142.2276 /T 152.4/ 11.4 2014-Aug-23 00:00 296.71890 13.73267 0.13318689333747 13.79 136.9196 /T 150.8/ 6.1 2014-Aug-24 00:00 294.40894 17.44556 0.14643193740742 14.10 132.4558 /T 144.2/ 2.4 2014-Aug-25 00:00 292.43713 20.49604 0.16038855537979 14.39 128.6893 /T 135.5/ 0.5 2014-Aug-26 00:00 290.74354 23.02137 0.17488011139194 14.65 125.4868 /T 126.0/ 0.2 2014-Aug-27 00:00 289.28070 25.13048 0.18977703293971 14.88 122.7382 /T 116.3/ 1.9 2014-Aug-28 00:00 288.01079 26.90811 0.20498332204550 15.10 120.3558 /T 106.6/ 5.3 2014-Aug-29 00:00 286.90355 28.41975 0.22042686758406 15.30 118.2708 /T 97.2/ 10.4 2014-Aug-30 00:00 285.93453 29.71610 0.23605265228480 15.48 116.4292 /T 88.0/ 17.2 2014-Aug-31 00:00 285.08389 30.83658 0.25181801870708 15.65 114.7884 /T 79.2/ 25.4 2014-Sep-01 00:00 284.33535 31.81211 0.26768936022343 15.81 113.3148 /T 71.0/ 34.8 2014-Sep-02 00:00 283.67550 32.66713 0.28363979041458 15.96 111.9817 /T 63.7/ 45.1 2014-Sep-03 00:00 283.09319 33.42113 0.29964748574074 16.09 110.7675 /T 57.8/ 56.0 2014-Sep-04 00:00 282.57907 34.08976 0.31569449505709 16.22 109.6547 /T 53.7/ 66.8 2014-Sep-05 00:00 282.12528 34.68575 0.33176587587974 16.34 108.6290 /T 52.2/ 77.2 2014-Sep-06 00:00 281.72516 35.21947 0.34784906086053 16.46 107.6789 /T 53.6/ 86.3 2014-Sep-07 00:00 281.37302 35.69949 0.36393338607289 16.57 106.7944 /T 57.7/ 93.5 2014-Sep-08 00:00 281.06404 36.13291 0.38000973119896 16.67 105.9675 /T 64.0/ 98.2 2014-Sep-09 00:00 280.79405 36.52564 0.39607023527483 16.77 105.1915 /T 71.8/ 99.9 2014-Sep-10 00:00 280.55949 36.88269 0.41210806362438 16.86 104.4605 /T 80.2/ 98.7
Setups
The rotation period is unknown, but given our guess for the diameter, it's possible that the bandwidth could be up to 80 Hz. Consequently, we're going to start with a coarse resolution setup so we can see an echo quickly: CW setup: --------------------------------------------------------------------------- TX polarization RCP RCV polarization LCP & RCP Frequency hops: no hopping Bandwidth: 4000 Hz TXoffset +500 Hz Sampling interval: 2500 x 0.1 usec FFT for PFS files: 800 for 5.0 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) ------------------------------------------------------------------------- 1-usec baud 1 usec code 255 FFT 512 ncoh 16 bandwidth 245 Hz resolution 0.48 Hz TXOFF +50 Hz ---------------------------------------------------------------------
Instructions
NOTE: Data should be moved to the appropriate subdirectories in aardvark:/export/data0/2001rz11/raw/
POINTING:
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
2001 RZ11 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/2001RZ11/2001RZ11_planning.html
Asteroid Radar Astronomy