Goldstone Radar Observations Planning: 2010 NY65
2010 NY65 was discovered on July 10, 2010 by the Wide-field Infrared Survey Explorer (WISE) spacecraft. This asteroid will make yearly close approaches to Earth from 2015 to 2022 that make it an excellent candidate for detecting Yarkovsky effect if radar ranging measurements occur over multiple close encounters spanning at least several years. If successful, detection of the orbital drift due to the Yarkovsky effect can yield an estimate of the asteroid's mass. Mainzer et al (2011) estimated a diameter of 0.23 km and an optical albedo of 7% based on thermal modeling of WISE mission data. There are no lightcurve observations of this object and thus no formal estimates of its rotation period. However, this object was observed with radar at Arecibo in 2014 and those observations can be used to constrain the rotation period. The Arecibo bandwidth of 1 Hz and the diameter of 0.23 km reported by Mainzer et al. place an upper bound on the rotation period of about 6.4 hours. Arecibo ranging measurments at 600 m resolution show a visible extent of 2 range bins, hinting that the diameter may be larger than 0.23 km. If so, then the rotation period could also be slower than 6 h. Time for observations has been requested at both Arecibo and Goldstone. At Goldstone the SNRs could be strong enough for coarse resolution imaging at 75 m resolution. The SNRs at Arecibo should be strong enough for imaging at 15 m resolution and reconstruction of the 3D shape. Radar observations started on June 20 at Arecibo and will conclude on June 28. The times scheduled at Goldstone and Arecibo are interleaved with only 12 minutes of overlap on one day (June 26). Arecibo observations on June 20 produced a deeply bifurcated CW spectrum, suggesting that 2010 NY65 could be a double-lobed object. The Arecibo bandwidth is about 1.2 Hz, so all else being equal, we should expect a bandwidth of 4 Hz at Goldstone. Sky motion during the radar observations is about 70 degrees. 2010 NY65 will brighten to 18th magniude from June 28-July 4. The Minor Planet Center has classified 2010 NY65 as a "Potentially Hazardous Asteroid."
Orbital and Physical Characteristics Provisional Designation 2010 NY65 Asteroid number not numbered Discoverer WISE Discovery date 2010 Jul 14 orbit type Aten Close approach date 2015 Jun 25 2016 Jun 24 2017 Jun 24 2018 Jun 24 2019 Jun 24 2020 Jun 24 2021 Jun 25 2022 Jun 26 Close approach dist. 0.0440 au 0.0275 au 0.0208 au 0.0187 au 0.0196 au 0.0251 au 0.0399 au 0.0629 au Close approach dist. 17.1 ld 10.7 ld 8.1 ld 7.3 ld 7.6 ld 9.8 ld 15.5 ld 24.5 ld semimajor axis 0.997 au eccentricity 0.370 inclination 11.7 deg perihelion distance 0.629 au aphelion distance 1.366 au Tisserand parameter 6.014 Clearly asteroidal absolute magnitude (H) 21.4 diameter 0.23 km (Mainzer et al., 2011, based on WISE thermal data) optical albedo 0.071 (Mainzer et al., 2011, based on WISE thermal data) rotation period ~6.4 h? pole direction unknown lightcurve amplitude unknown spectral class unknown Last update: 2015 May 28
2010 NY65 http://www.minorplanetcenter.net/mpec/K10/K10O14.html
SNR Calculations
2010 NY65 GOLDSTONE SNRS Assumptions: D = 0.23 km, P = 7 h, OC radar albedo = 0.1 WK DOY start date window RA, dec dist runs SNR/day SNR/run 25 169 2015 Jun 18 16:57-02:52 118, +12 0.070 266 18 1 25 170 2015 Jun 19 17:06-03:10 123, +13 0.064 294 26 2 25 171 2015 Jun 20 17:19-03:32 128, +15 0.059 325 37 2 26 172 2015 Jun 21 17:35-03:59 134, +16 0.054 358 53 3 26 173 2015 Jun 22 17:56-04:32 142, +18 0.049 393 73 4 26 174 2015 Jun 23 18:23-05:10 151, +20 0.046 423 95 5 26 175 2015 Jun 24 18:56-05:52 162, +21 0.044 445 110 6 Scheduled 26 176 2015 Jun 25 19:34-06:34 173, +22 0.044 453 120 6 26 177 2015 Jun 26 20:14-07:12 184, +22 0.045 443 110 6 Scheduled 26 178 2015 Jun 27 20:53-07:46 194, +21 0.047 421 90 5 Scheduled 27 179 2015 Jun 28 21:29-08:13 203, +20 0.051 390 68 4 Scheduled 27 180 2015 Jun 29 22:00-08:34 210, +18 0.055 356 49 3 27 181 2015 Jun 30 22:25-08:51 217, +17 0.060 324 35 2 27 182 2015 Jul 1 22:46-09:03 222, +16 0.065 294 24 2 27 183 2015 Jul 2 23:03-09:13 226, +15 0.071 268 17 1 Goldstone SNRs assume Ptx = 440 kW and Tsys = 18 K. ARECIBO SNRS WK DOY start date window RA, dec dist runs SNR/day SNR/run 25 166 2015 Jun 15 16:56-19:18 109, +9 0.091 46 76 12 25 167 2015 Jun 16 17:00-19:26 111, +10 0.084 51 110 16 25 168 2015 Jun 17 17:06-19:36 114, +11 0.077 57 150 21 25 169 2015 Jun 18 17:14-19:49 118, +12 0.071 64 210 28 25 170 2015 Jun 19 17:25-20:04 122, +13 0.065 72 310 38 25 171 2015 Jun 20 17:40-20:23 127, +15 0.059 79 450 52 Scheduled 26 173 2015 Jun 21 17:59-20:45 133, +16 0.054 88 640 71 26 174 2015 Jun 22 18:24-21:13 141, +18 0.050 92 850 93 26 175 2015 Jun 23 18:55-21:45 150, +20 0.047 105 1200 120 26 176 2015 Jun 24 19:32-22:22 160, +21 0.045 109 1400 140 Scheduled 26 177 2015 Jun 25 20:12-23:02 171, +22 0.044 111 1500 140 Scheduled 26 178 2015 Jun 26 20:53-23:42 182, +22 0.045 109 1400 140 Scheduled 26 179 2015 Jun 27 21:30-00:20 193, +21 0.047 104 1100 120 27 180 2015 Jun 28 22:03-00:52 202, +20 0.050 98 880 93 27 181 2015 Jun 29 22:30-01:18 209, +19 0.054 84 630 71 Scheduled 27 182 2015 Jun 30 22:52-01:39 216, +17 0.059 83 460 52 27 183 2015 Jul 1 23:10-01:55 221, +16 0.065 75 320 39 27 184 2015 Jul 2 23:25-02:07 225, +15 0.070 67 230 29 27 185 2015 Jul 3 23:37-02:17 229, +14 0.077 61 160 21 27 186 2015 Jul 4 23:46-02:24 232, +13 0.083 55 120 16 28 187 2015 Jul 5 23:54-02:29 235, +12 0.090 51 85 12 28 188 2015 Jul 7 00:00-02:33 237, +11 0.097 46 63 10 Assumptions: Ptx = 800 kW, Tsys = 23 K
Track Assignments
DOY BOA BOT EOT EOA 175 2220 2350 0250 0320 DSS-14 GSSR AST 2010 NY65 177 2300 0030 0255 0325 DSS-14 GSSR AST 2010 NY65 178 2300 0030 0250 0320 DSS-14 GSSR AST 2010 NY65 179 2145 2315 0245 0315 DSS-14 GSSR AST 2010 NY65 Transmit Authorization Times: 175 JUNE-24-2015 2250Z 0250Z 14 AST 2010 NY65 177 JUNE-26-2015 2330Z 0255Z 14 AST 2010 NY65 178 JUNE-27-2015 2330Z 0250Z 14 AST 2010 NY65 179 JUNE-28-2015 2215Z 0245Z 14 AST 2010 NY65 Goldstone tracks: UT UT PDT Duration Round-trip DOY Date TX Window TX Window hh:mm time (sec) 175-176 Jun 24-25 2250-0250 1550-1950 Jun 24 4:00 46 177-178 Jun 26-27 2330-0255 1630-1955 Jun 26 3:25 44 178-179 Jun 27-28 2330-0250 1630-1950 Jun 27 3:20 45 179-180 Jun 28-29 2215-0245 1515-1945 Jun 28 4:30 47 The start times above assume we can begin 30 minutes into precal. We'll update these as necessary when the actual transmit authorization times become available. Arecibo tracks: UT UT PDT Duration Round-trip Date TX Window TX Window hh:mm time (sec) 2015 Jun 20 1740-2023 1040-1323 Jun 20 2:43 59 2015 Jun 24 1932-2222 1332-1522 Jun 24 2:50 45 2015 Jun 25 2012-2302 1312-1602 Jun 25 2:50 44 2015 Jun 26 2053-2342 1353-1642 Jun 26 2:49 45 2015 Jun 29-30 2230-0118 1530-1818 Jun 27 2:48 54
Uncertainties
JPL/Horizons solution 25, # obs: 54 (1 delay, 1 Doppler) (2010-2014): Date__(UT)__HR:MN R.A._(a-appar)_DEC. POS_3sigma DOP_S_3sig DOP_X_3sig RT_delay_3sig 2015-Jun-15 00:00 *m 106.82020 8.18559 1.028 1.28 4.64 0.000458 2015-Jun-16 00:00 *m 109.08675 8.93015 1.064 1.28 4.65 0.000419 2015-Jun-17 00:00 *m 111.72828 9.79728 1.102 1.28 4.66 0.000381 2015-Jun-18 00:00 *m 114.83612 10.80565 1.139 1.29 4.67 0.000346 2015-Jun-19 00:00 *m 118.52647 11.97347 1.173 1.28 4.66 0.000315 2015-Jun-20 00:00 *m 122.94454 13.31390 1.200 1.27 4.61 0.000288 2015-Jun-21 00:00 *m 128.26423 14.82546 1.215 1.23 4.47 0.000268 2015-Jun-22 00:00 *m 134.67526 16.47526 1.210 1.15 4.19 0.000253 2015-Jun-23 00:00 *m 142.34322 18.17459 1.181 1.01 3.68 0.000244 2015-Jun-24 00:00 *m 151.32646 19.75707 1.131 0.81 2.94 0.000238 2015-Jun-25 00:00 *m 161.45682 20.98779 1.079 0.60 2.19 0.000230 2015-Jun-26 00:00 *m 172.25710 21.63636 1.051 0.58 2.11 0.000216 2015-Jun-27 00:00 *m 183.01731 21.59357 1.055 0.78 2.83 0.000196 2015-Jun-28 00:00 *m 193.04300 20.93314 1.068 1.01 3.66 0.000174 2015-Jun-29 00:00 *m 201.89098 19.85511 1.067 1.16 4.23 0.000157 2015-Jun-30 00:00 * 209.42367 18.57566 1.043 1.25 4.55 0.000152 ********************************************************************************************** Apparent Magnitudes, Solar Elongations, Lunar Elongations, and Lunar Illumination: Date__(UT)__HR:MN R.A._(J2000.0)_DEC. APmag delta S-O-T /r T-O-M/Illu% 2015-Jun-10 00:00 * 98.88310 5.79821 25. 0.13428981120576 26.7251 /T 106.2/ 46.7 2015-Jun-11 00:00 * 100.08513 6.14360 25. 0.12646270891765 26.6650 /T 93.7/ 35.5 2015-Jun-12 00:00 * 101.42763 6.54807 25. 0.11875870153589 26.6703 /T 81.2/ 25.1 2015-Jun-13 00:00 * 102.93865 7.02041 25. 0.11118607979554 26.7628 /T 68.8/ 15.9 2015-Jun-14 00:00 *m 104.65316 7.57117 25. 0.10375651966413 26.9727 /T 56.7/ 8.6 2015-Jun-15 00:00 *m 106.61522 8.21295 25. 0.09648620540075 27.3416 /T 44.9/ 3.5 2015-Jun-16 00:00 *m 108.88076 8.96064 24. 0.08939736881170 27.9261 /T 33.5/ 0.7 2015-Jun-17 00:00 *m 111.52117 9.83138 24. 0.08252041012626 28.8031 /T 22.6/ 0.4 2015-Jun-18 00:00 *m 114.62779 10.84388 24. 0.07589681471798 30.0742 /T 12.5/ 2.4 2015-Jun-19 00:00 *m 118.31687 12.01645 23. 0.06958310365232 31.8701 /T 4.062/ 6.4 2015-Jun-20 00:00 *m 122.73373 13.36232 23. 0.06365597381950 34.3515 /T 7.059/ 12.2 2015-Jun-21 00:00 *m 128.05244 14.88006 22. 0.05821840026693 37.7025 /T 14.6/ 19.5 2015-Jun-22 00:00 *m 134.46299 16.53666 21. 0.05340540258727 42.1093 /T 21.4/ 27.7 2015-Jun-23 00:00 *m 142.13141 18.24310 21. 0.04938590552142 47.7152 /T 27.3/ 36.7 2015-Jun-24 00:00 *m 151.11656 19.83236 20. 0.04635377652043 54.5461 /T 32.4/ 46.2 2015-Jun-25 00:00 *m 161.25052 21.06851 19.14 0.04449965907664 62.4231 /T 36.6/ 55.8 2015-Jun-26 00:00 *m 172.05581 21.72013 18.60 0.04396290838555 70.9229 /T 40.2/ 65.2 2015-Jun-27 00:00 *m 182.82141 21.67747 18.21 0.04478288613671 79.4574 /T 43.4/ 74.2 2015-Jun-28 00:00 *m 192.85173 21.01455 17.96 0.04688236376674 87.4606 /T 46.7/ 82.4 2015-Jun-29 00:00 *m 201.70296 19.93227 17.84 0.05009644272420 94.5558 /T 50.5/ 89.4 2015-Jun-30 00:00 * 209.23751 18.64776 17.80 0.05422458551816 100.5986 /T 55.1/ 94.9 2015-Jul-01 00:00 * 215.53127 17.32339 17.83 0.05907413141432 105.6177 /T 60.7/ 98.5 2015-Jul-02 00:00 * 220.75597 16.05409 17.89 0.06448231408642 109.7302 /T 67.4/ 99.8 2015-Jul-03 00:00 * 225.10108 14.88380 17.98 0.07032110497866 113.0793 /T 75.2/ 98.7 2015-Jul-04 00:00 * 228.73777 13.82573 18.09 0.07649349521758 115.8021 /T 84.0/ 95.0 2015-Jul-05 00:00 * 231.80802 12.87725 18.21 0.08292721525999 118.0165 /T 93.4/ 88.9 2015-Jul-06 00:00 * 234.42509 12.02875 18.33 0.08956869059625 119.8190 /T 103.4/ 80.8 2015-Jul-07 00:00 * 236.67785 11.26837 18.45 0.09637812714095 121.2871 /T 113.7/ 71.0 2015-Jul-08 00:00 * 238.63574 10.58426 18.57 0.10332579279137 122.4818 /T 124.0/ 60.2 2015-Jul-09 00:00 * 240.35313 9.96559 18.69 0.11038929409179 123.4518 /T 134.1/ 48.9 2015-Jul-10 00:00 * 241.87283 9.40287 18.81 0.11755160808416 124.2354 /T 143.4/ 37.8
Setups
CW setup: --------------------------------------------------------------------------- TX polarization RCP RCV polarization LCP & RCP Frequency hops: no hopping Bandwidth: 5000 Hz TXoffset +500 Hz FFT for PFS files: 10,000 for 0.5 Hz resolution Ranging setups: --------------------------------------------------------------------------- 10-usec baud 10 usec code 127 PRP 1270 usec FFT 128 ncoh 1 bandwidth 787 Hz resolution 6.15 Hz TXOFF +100Hz (echo in col 81) --------------------------------------------------------------------------- 11-usec baud 11 usec code 127 PRP 1397 usec FFT 128 ncoh 1 bandwidth 716 Hz resolution 5.6 Hz TXOFF +100 Hz (echo in bin 82) ---------------------------------------------------------------------
Instructions
NOTE: Data should be moved to the appropriate subdirectories in aardvark:/export/data0/2010ny65/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
2010 NY65 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/2010NY65/2010NY65_planning.html
Asteroid Radar Astronomy
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