Goldstone Radar Observations Planning: (501647) 2014 SD224
2014 SD224 was discovered on 2014 September 22 by Pan-STARRS 1. This asteroid has an absolute magnitude of 22.2, which suggests a diameter of roughly 120 meters, but otherwise nothing is known about its physical properties. This asteroid will approach within 0.020 au on 2020 December 25 and we are expecting SNRs at Goldstone that might be strong enough for delay-Doppler imaging. Observations at Goldstone are scheduled on December 23, 26, and 28. Observations will not be possible at Arecibo. The 2020 Earth flyby is the closest by this asteroid until 2078.
Orbital and Physical Characteristics Name 2014 SD224 Asteroid number 501647 Discoverer Pan-STARRS 1 Discovery date 2014 September 22 Close approach distance 0.0202 au (7.9 lunar distances) Close approach date 2020 Dec 25 Orbit type Aten semimajor axis 0.978 au eccentricity 0.331 inclination 4.5 deg Orbital period 0.9665 years perihelion distance 0.654 au aphelion distance 1.302 au MOID 0.0693 au absolute magnitude (H) 22.3 diameter ~0.12 km optical albedo unknown rotation period unknown lightcurve amplitude unknown pole direction unknown spectral class unknown PHA? No Last update: 2021 January 13
Goldstone Radar Images of Near-Earth Asteroid (501647) 2014 SD224
Delay-Doppler radar images of 2014 SD224 obtained on December 26, 2020. The resolution is 7.5 m x 0.08 Hz except in the last two panels on the top row, where the range resolution is 3.75 m. Range increases down and Doppler frequency increases to the right, so rotation is counter clockwise. Radar illumination is from the top.
2014 SD224 https://www.minorplanetcenter.net/mpec/K14/K14S92.html
Goldstone SNRs 2014 SD224: D = 0.12 km, P = 0.5 h, OC albedo = 0.1, Ptx = 450 kW w DOY start date window RA, dec dist runs SNR/day SNR/run 51 354-355 2020 Dec 19-20 23:44-15:29 84, +64 0.038 769 34 1 51 355-356 2020 Dec 20-21 22:39-15:25 75, +68 0.033 944 59 2 52 356-357 2020 Dec 21-22 20:56-15:07 59, +72 0.029 1208 100 3 52 357-358 2020 Dec 22-23 18:17-12:58 31, +74 0.025 1523 180 5 Scheduled Dec. 23 0630-1210 52 358-359 2020 Dec 23-24 16:21-09:21 357, +71 0.023 1481 280 8 52 359-360 2020 Dec 24-25 16:07-06:43 334, +61 0.021 1333 370 11 52 360-361 2020 Dec 25-26 16:12-05:02 320, +48 0.020 1182 380 12 52 361-362 2020 Dec 26-27 16:21-03:52 313, +33 0.021 1003 300 10 Scheduled Dec. 26 1625-2105 52 362-363 2020 Dec 27-28 16:32-03:00 308, +21 0.023 817 190 7 Scheduled Dec. 28 0140-0300 53 363-364 2020 Dec 28-29 16:43-02:19 305, +10 0.027 654 110 4 53 364-365 2020 Dec 29-30 16:52-01:45 302, +3 0.031 524 58 3 53 365-366 2020 Dec 30-31 17:00-01:17 301, -3 0.035 424 31 2 Horizons were adjusted up to 35 deg on dates when the asteroid is circumpolar to make the asteroid appear to set. The rotation period of 0.5 hours above is a guess based on the absolute magnitude, which is a rough threshold between objects that rotate with periods > 2.1 h and those that rotate more rapidly. Many objects with H ~ 22 rotate more slowly than 0.5 hours, so all else being equal, the SNRs above could be conservative. ARECIBO SNRs 2014 SD224: D = 0.12 km, P = 0.5 h, OC albedo = 0.1 start date window RA, dec dist runs SNR/day SNR/run 2020 Dec 26 18:18-19:46 313, +35 0.021 135 2200 210 2020 Dec 27 17:14-19:56 308, +22 0.023 224 2500 180 2020 Dec 28 17:00-19:32 305, +12 0.026 177 1400 110 2020 Dec 29 17:09-18:55 303, +4 0.030 107 630 69 Arecibo SNRs assume Ptx = 900 kW, Tsys = 25 K, D = 0.12 km, and gain = 10 K/Jy. >> Observations at Arecibo will not be possible <<
Track Assignments
DOY BOA BOT EOT EOA 357 0300 0800 DSS-13 DSSR Ursids Meteor Stream DSS-13 transmit 7190 MHz 357 0300 0800 DSS-25 DSSR Ursids Meteor Stream DSS-28 receive 7190 MHz 358 0500 0630 1210 1240 DSS-14 GSSR AST 2014 SD224 361 1455 1625 2105 2135 DSS-14 GSSR AST 2014 SD224 363 0010 0140 0300 0330 DSS-14 GSSR AST 2014 SD224 Goldstone tracks: UT UT PST Duration Round-trip DOY Date TX Window TX Window hh:mm time (sec) SNR/RTT Observer 357 Dec 22 Ursids 0300-0800 1900-0000 Dec 21 5:00 MB 358 Dec 23 2014 SD224 0630-1210 2230-0410 Dec 22-23 5:40 25 5 SN Start during precal? 361 Dec 26 2014 SD224 1625-2105 0825-1305 Dec 26 4:40 21 10 MB 363 Dec 28 2014 SD224 0140-0300 1740-1900 Dec 27 1:20 23 7 LB Start during precal? High elevations will not be a problem during the Goldstone tracks. Arecibo tracks: UT UT PST Round-trip Date TX Window TX Window time (sec) >> Observations at Arecibo will not be possible <<
Uncertainties
2014 SD224 JPL/Horizons solution 49, # obs: 163 (2014-2020) 2020 Dec 17 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_S_3sig DOP_X_3sig RT_delay_3sig 2020-Dec-20 00:00 *m 86.33716 63.22787 0.03933321492645 1.746 0.37 1.33 0.000320 2020-Dec-21 00:00 *m 78.45779 66.95667 0.03448207301194 2.038 0.39 1.40 0.000328 2020-Dec-22 00:00 *m 64.08895 70.98920 0.02997890937938 2.434 0.51 1.86 0.000332 2020-Dec-23 00:00 *m 36.76488 73.73945 0.02599447145704 2.981 0.87 3.17 0.000326 * 2020-Dec-24 00:00 *m 359.52593 71.07944 0.02279335290468 3.709 1.55 5.62 0.000303 2020-Dec-25 00:00 *m 333.43811 61.16116 0.02073525066381 4.518 2.45 8.89 0.000259 2020-Dec-26 00:00 *m 319.76741 47.02901 0.02017056947642 5.077 3.13 11.37 0.000203 * 2020-Dec-27 00:00 *m 312.18242 32.32258 0.02122022435819 5.072 3.16 11.47 0.000174 2020-Dec-28 00:00 *m 307.50151 19.55686 0.02367509514804 4.601 2.68 9.76 0.000198 * 2020-Dec-29 00:00 *m 304.35401 9.52453 0.02716399635773 3.975 2.12 7.70 0.000246 2020-Dec-30 00:00 * 302.09759 1.92750 0.03135269597227 3.388 1.66 6.05 0.000294 2020-Dec-31 00:00 * 300.39998 -3.81664 0.03600834125841 2.902 1.34 4.88 0.000336 - - - - - - - - - - JPL/Horizons solution 43, # obs: 136 (2014-2019) 2020 Oct 26 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_S_3sig DOP_X_3sig RT_delay_3sig 2020-Dec-20 00:00 *m 86.33656 63.22772 0.03933339738626 8.317 1.57 5.70 0.001336 2020-Dec-21 00:00 *m 78.45711 66.95643 0.03448226382237 9.566 1.26 4.57 0.001393 2020-Dec-22 00:00 *m 64.08836 70.98884 0.02997910628108 11.208 0.73 2.64 0.001433 2020-Dec-23 00:00 *m 36.76509 73.73896 0.02599466934664 13.444 1.48 5.37 0.001433 * 2020-Dec-24 00:00 *m 359.52742 71.07908 0.02279354155500 16.467 4.27 15.53 0.001357 2020-Dec-25 00:00 *m 333.43963 61.16112 0.02073541307053 20.028 8.38 30.45 0.001157 2020-Dec-26 00:00 *m 319.76861 47.02924 0.02017068565708 22.808 11.99 43.58 0.000818 * 2020-Dec-27 00:00 *m 312.18335 32.32294 0.02122028204819 23.268 12.91 46.93 0.000415 2020-Dec-28 00:00 *m 307.50227 19.55724 0.02367509541135 21.550 11.43 41.54 0.000231 * 2020-Dec-29 00:00 *m 304.35464 9.52487 0.02716394797346 18.935 9.26 33.64 0.000481 2020-Dec-30 00:00 * 302.09813 1.92779 0.03135260852910 16.355 7.38 26.82 0.000747 2020-Dec-31 00:00 * 300.40046 -3.81639 0.03600822239751 14.146 6.00 21.80 0.000970
Apparent Magnitudes, Solar Elongations, Lunar Elongations, and Lunar Illumination: Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta APmag S-brt S-O-T /r T-O-M/MN_Illu% 2020-Dec-01 00:00 103.79316 41.88015 0.15062706447742 19.767 n.a. 143.6835 /L 31.1/ 99.6593 2020-Dec-02 00:00 103.80472 42.25969 0.14428215225106 19.652 n.a. 144.3690 /L 22.3/ 97.5846 2020-Dec-03 00:00 103.79087 42.66560 0.13798335510656 19.534 n.a. 145.0377 /L 17.9/ 93.6156 2020-Dec-04 00:00 103.74880 43.10126 0.13173070967945 19.412 n.a. 145.6857 /L 21.1/ 87.8209 2020-Dec-05 00:00 103.67515 43.57066 0.12552435214857 19.286 n.a. 146.3081 /L 29.9/ 80.3429 2020-Dec-06 00:00 103.56577 44.07854 0.11936455213362 19.156 n.a. 146.8989 /L 41.0/ 71.4001 2020-Dec-07 00:00 103.41556 44.63056 0.11325175354567 19.022 n.a. 147.4508 /L 53.1/ 61.2929 2020-Dec-08 00:00 103.21818 45.23354 0.10718662506638 18.884 n.a. 147.9546 /L 65.8/ 50.4100 2020-Dec-09 00:00 102.96560 45.89577 0.10117012380284 18.741 n.a. 148.3992 /L 79.0/ 39.2368 2020-Dec-10 00:00 102.64751 46.62740 0.09520357710820 18.594 n.a. 148.7703 /L 92.5/ 28.3544 2020-Dec-11 00:00 102.25051 47.44099 0.08928879055028 18.441 n.a. 149.0500 /L 106.1/ 18.4194 2020-Dec-12 00:00 101.75672 48.35226 0.08342819614938 18.283 n.a. 149.2156 /L 119.6/ 10.1109 2020-Dec-13 00:00 101.14180 49.38107 0.07762506633618 18.119 n.a. 149.2381 /L 132.4/ 4.0429 2020-Dec-14 00:00 100.37158 50.55279 0.07188383761946 17.950 n.a. 149.0802 /L 143.6/ 0.6595 2020-Dec-15 00:00 99.39654 51.90015 0.06621061576641 17.776 n.a. 148.6934 /L 150.8/ 0.1504 2020-Dec-16 00:00 98.14205 53.46577 0.06061397577613 17.596 n.a. 148.0139 /L 151.1/ 2.4236 2020-Dec-17 00:00 96.49032 55.30524 0.05510623728492 17.411 n.a. 146.9572 /L 144.6/ 7.1476 2020-Dec-18 00:00 94.24477 57.49052 0.04970551673777 17.222 n.a. 145.4086 /L 134.2/ 13.8415 2020-Dec-19 00:00 91.05396 60.11093 0.04443908216283 17.032 n.a. 143.2100 /L 122.4/ 21.9735 2020-Dec-20 00:00 86.23393 63.26239 0.03934894490540 16.844 n.a. 140.1398 /T 109.9/ 31.0367 2020-Dec-21 00:00 78.31465 66.98646 0.03450130809465 16.666 n.a. 135.8827 /T 97.4/ 40.5890 2020-Dec-22 00:00 63.88427 71.00405 0.03000237596940 16.517 n.a. 129.9952 /T 85.2/ 50.2617 2020-Dec-23 00:00 36.52451 73.71914 0.02602291268821 16.428 n.a. 121.8930 /T 74.5/ 59.7476 * 2020-Dec-24 00:00 359.42042 71.02330 0.02282716103734 16.461 n.a. 110.9649 /T 67.4/ 68.7819 2020-Dec-25 00:00 333.45208 61.10994 0.02077370169647 16.716 n.a. 97.0260 /T 67.7/ 77.1206 NEOWISE...? 2020-Dec-26 00:00 319.81390 47.00820 0.02021119134766 17.304 n.a. 81.0955 /T 77.2/ 84.5247 * 2020-Dec-27 00:00 312.23341 32.33417 0.02125965781237 18.264 n.a. 65.4337 /T 93.1/ 90.7513 2020-Dec-28 00:00 307.55018 19.58947 0.02371097419471 20. n.a. 52.0326 /T 111.0/ 95.5543 * 2020-Dec-29 00:00 304.39896 9.56620 0.02719555273684 21. n.a. 41.4860 /T 128.4/ 98.6948 2020-Dec-30 00:00 302.13884 1.97100 0.03138012486965 22. n.a. 33.4148 /T 144.3/ 99.9604 2020-Dec-31 00:00 300.43792 -3.77468 0.03603216060877 24. n.a. 27.2005 /T 157.6/ 99.1908
Setups
CW setup: --------------------------------------------------------------------------- TX polarization RCP RCV polarization LCP & RCP Frequency hops: no hopping Bandwidth: 5000 Hz TXoffset +500 Hz FFT 5000 for 1 Hz resolution Ranging setups: --------------------------------------------------------------------------- 10-usec baud 10 usec code 127 PRP 1270 usec ncoh 1 bandwidth 787 Hz FFT 128 resolution 6.15 Hz TXoffset +100 Hz (echo in column 80) --------------------------------------------------------------------------- 11-usec baud 11 usec code 127 PRP 1397 usec ncoh 1 bandwidth 716 Hz FFT 128 resolution 5.6 Hz TXoffset +100 Hz (echo in column 82) ------------------------------------------------------------------------- 1-usec baud 1 usec code 511 ncoh 4 bandwidth 489.2 Hz FFT 128 resolution 3.8 Hz TXoffset +100 Hz (echo in column 91) ---------------------------------------------------------------------
Instructions
NOTE: Data should be moved to the appropriate subdirectories in aardvark:/export/data0/2014SD224/raw/
POINTING:
OSOD and predicts will be on aardvark: /export/data3/osod/ops/a501647/EPH.OUT.s??? /export/data3/osod/ops/a501647/PRDX.OUT.14f-14-14.s??? /export/data3/osod/ops/a501647/PRDX.OUT.14v-14-14.s??? /export/data3/osod/ops/a501647/PUNCH.OUT.14f-14-14.s??? /export/data3/osod/ops/a501647/PUNCH.OUT.14v-14-14.s??? POINTING MACRO TX Offsets Date (UTC) DOY hhmmss RA Dec Macro LHA Dec RTT OSOD ...Not available yet... Transmit offsets are given in millidegrees.
PRDX.OUT.14f-14-14.?? TARGET IS A#0000 ET-UT(FIRST POINT) = 69.182398682 ET-UT1(FIRST POINT) = 69.357566315 TRANSMITTER: STATION #14, RECEIVER: STATION #14 RECEIVER U.T. RANGE DOPPLER AZI DEC RA EL D-DOP D-RANGE ...Not available yet...
(501647) 2014 SD224 GOLDSTONE MASTERLOG
============================================================================== Receive TX Setup code ncoh FFT runs start -stop OSOD offset Notes
Dr. Lance A. M. Benner | PHONE: (818) 354-7412 Mail Stop 183-601 | FAX: (818) 393-4445 Jet Propulsion Laboratory | email: lance.benner@jpl.nasa.gov California Institute of Technology | Plan: To live long and prosper Pasadena, CA 91109-8099 https://echo.jpl.nasa.gov/asteroids/2014SD224/2014sd224.2020.goldstone.planning.html
Asteroid Radar Astronomy