Goldstone Radar Observations Planning: (144332) 2004 DV24
2004 DV24 was discovered on 2004 February 21 by NASA's Near-Earth Asteroid Tracking (NEAT) program on Haleakala, Hawaii. This asteroid has an absolute magnitude of 16.5 that suggests a diameter of roughly 2 km, but otherwise nothing is known about its physical properties. 2004 DV24 will approach within 0.056 au on September 16 and observations at Goldstone are are scheduled on September 12. Observations at Arecibo are scheduled on Sep. 13-15. The Minor Planet Center has classified 2004 DV24 as a "Potentially Hazardous Asteroid."
Orbital and Physical Characteristics
Name 2004 DV24
Asteroid number 144332
Discoverer NEAT 608 Haleakala
Discovery date 2004 Feb 21
orbit type Amor
Close approach dist. 0.0556 au
Close approach dist. 21.6 lunar distances
Close approach date 2018 Sep 16
semimajor axis 1.423 au
eccentricity 0.289
inclination 55.9 deg
Orbital period 1.697 years
perihelion distance 1.011 au
aphelion distance 1.834 au
Tisserand parameter
absolute magnitude (H) 16.5
diameter ~1.9 km +- a factor of two
optical albedo unknown
rotation period P > 3 h T. Lister, pers. comm.
P ~ 8 h A. Diepvens, pers. comm.
pole direction unknown
lightcurve amplitude unknown
spectral class unknown
PHA
Last update: 2018 September 11
2004 DV24 https://minorplanetcenter.net/mpec/K04/K04D33.html
GOLDSTONE SNRS 2004 DV24: D = 1.9 km, P = 2.2 h, OC albedo = 0.1 w DOY start date window RA, dec dist runs SNR/day SNR/run 37 253-254 2018 Sep 10-11 19:11-09:38 271, +57 0.107 238 15 1 37 254-255 2018 Sep 11-12 19:31-09:09 271, +51 0.093 259 25 2 Scheduled on Sep. 12 37 255-256 2018 Sep 12-13 19:52-08:38 271, +44 0.080 280 44 3 37 256-257 2018 Sep 13-14 20:17-08:03 270, +34 0.069 300 77 5 37 257-258 2018 Sep 14-15 20:47-07:22 270, +21 0.060 307 130 8 37 258-259 2018 Sep 15-16 21:26-06:32 270, +4 0.056 284 160 10 37 259-260 2018 Sep 16-16 22:21-05:26 270, -13 0.057 219 120 9 38 260-261 2018 Sep 17-18 23:51-03:46 270, -29 0.062 110 53 5 CANCELLED Goldstone SNRs assume Ptx = 100 kW and Tsys = 17 K Constraints on the rotation period suggest, all else being equal, that the SNRs will be about double the values above. ARECIBO SNRS start date window RA, dec dist runs SNR/day SNR/run 2018 Sep 13 22:18-23:43 270, +36 0.070 36 1500 260 Scheduled 2018 Sep 14 21:32-00:16 270, +23 0.061 80 4400 510 Scheduled 2018 Sep 15 21:41-23:52 270, +7 0.056 70 5400 690 Scheduled Arecibo SNRs assume Ptx = 600 kW and Tsys = 25 K. Actual transmitter power is probably closer to 250 kW, but will still be strong enough for high-resolution imaging.
Track Assignments
DOY BOA BOT EOT EOA 255 0530 0700 0905 0935 GSSR AST 2004 DV24 (this corrects the set time previously scheduled by 30 minutes) 261 0045 0215 0315 0345 GSSR AST 2004 DV24 CANCELLED Goldstone tracks: UT UT PDT Duration Round-trip DOY Date TX Window TX Window hh:mm time (sec) 255 Sep 12 0600-0905 2300-0205 Sep 11-12 3:05 93 Start times indicate when we can transmit, which on both days is only 30 minutes after we get the telescope. Arecibo tracks: UT UT PDT Round-trip Date TX Window TX Window time (sec) Sep 13 2218-2343 1518-1643 Sep 13 70 Sep 14-15 2132-0016 1432-1716 Sep 14 61 Sep 15 2141-2352 1441-1652 Sep 15 56
Uncertainties
JPL/Horizons solution 162, # obs: 770 (1955-2018) 2018 Sep 10 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_S_3sig DOP_X_3sig RT_delay_3sig 2018-Sep-10 00:00 *m 271.17405 61.40207 0.12408498310110 0.590 0.52 1.90 0.000670 2018-Sep-11 00:00 *m 270.99444 57.34358 0.10904147721564 0.648 0.60 2.17 0.000675 2018-Sep-12 00:00 *m 270.82162 52.02041 0.09468733668312 0.722 0.71 2.57 0.000680 2018-Sep-13 00:00 *m 270.65502 44.88099 0.08140840614022 0.836 0.90 3.25 0.000680 2018-Sep-14 00:00 *m 270.49403 35.17941 0.06983972637822 1.043 1.33 4.83 0.000669 2018-Sep-15 00:00 *m 270.33801 22.17754 0.06097891420508 1.420 2.30 8.34 0.000630 2018-Sep-16 00:00 *m 270.18632 5.92253 0.05613492648336 1.933 3.71 13.47 0.000546 2018-Sep-17 00:00 *m 270.03836 -11.70674 0.05635851018438 2.314 4.61 16.75 0.000421 2018-Sep-18 00:00 *m 269.89356 -27.72892 0.06159363096664 2.344 4.31 15.68 0.000299 2018-Sep-19 00:00 *m 269.75144 -40.43327 0.07073061760788 2.124 3.37 12.26 0.000229 JPL/Horizons solution 151, # obs: 615 (1955-2018) 2018 July 27 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_S_3sig DOP_X_3sig RT_delay_3sig 2018-Sep-10 00:00 *m 271.17423 61.40188 0.12408558496352 1.978 2.09 7.60 0.001894 2018-Sep-11 00:00 *m 270.99463 57.34339 0.10904211198335 2.039 2.37 8.62 0.001969 2018-Sep-12 00:00 *m 270.82182 52.02022 0.09468800836688 2.024 2.58 9.38 0.002053 2018-Sep-13 00:00 *m 270.65523 44.88084 0.08140911661950 1.878 2.50 9.09 0.002137 2018-Sep-14 00:00 *m 270.49426 35.17933 0.06984047006161 1.679 1.85 6.72 0.002198 2018-Sep-15 00:00 *m 270.33825 22.17760 0.06097966700429 2.229 3.01 10.95 0.002182 2018-Sep-16 00:00 *m 270.18657 5.92282 0.05613563449431 4.043 8.00 29.09 0.002007 2018-Sep-17 00:00 *m 270.03862 -11.70625 0.05635910394585 5.896 12.50 45.43 0.001639 2018-Sep-18 00:00 *m 269.89385 -27.72833 0.06159407047028 6.650 13.18 47.90 0.001177 2018-Sep-19 00:00 *m 269.75173 -40.43269 0.07073090847743 6.391 11.10 40.36 0.000755
Apparent Magnitudes, Solar Elongations, Lunar Elongations, and Lunar Illumination: Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta APmag S-O-T /r T-O-M/Illu% 2018-Aug-19 00:00 277.62297 81.59319 0.47508935761586 17.50 82.5505 /T 99.4/ 56.9 2018-Aug-21 00:00 276.75966 81.11976 0.44436080453796 17.38 83.1858 /T 101.4/ 75.1 2018-Aug-23 00:00 275.96713 80.56254 0.41320789376531 17.25 83.8447 /T 101.4/ 89.4 2018-Aug-25 00:00 275.24048 79.90204 0.38166935489157 17.10 84.5280 /T 99.6/ 98.0 2018-Aug-27 00:00 274.57394 79.11096 0.34978877984304 16.93 85.2377 /T 96.4/ 99.7 2018-Aug-29 00:00 273.96143 78.15021 0.31761661382484 16.75 85.9767 /T 92.8/ 94.0 2018-Aug-31 00:00 273.39707 76.96220 0.28521354763371 16.54 86.7499 /T 89.4/ 81.0 2018-Sep-02 00:00 272.87567 75.45911 0.25265656196836 16.31 87.5652 /T 87.1/ 62.2 2018-Sep-04 00:00 272.39311 73.50113 0.22005030807271 16.03 88.4354 /T 86.5/ 40.2 2018-Sep-06 00:00 271.94646 70.85322 0.18755009719384 15.71 89.3820 /T 87.5/ 19.2 2018-Sep-08 00:00 271.53373 67.09289 0.15541258434352 15.33 90.4414 /T 88.7/ 4.5 2018-Sep-10 00:00 271.15296 61.39641 0.12412009809214 14.85 91.6766 /T 87.7/ 0.2 2018-Sep-12 00:00 270.80126 52.01612 0.09472454009110 14.26 93.1842 /T 80.9/ 7.0 2018-Sep-14 00:00 270.47443 35.18228 0.06987808119584 13.59 94.9852 /T 63.4/ 21.9 2018-Sep-16 00:00 270.16750 5.94467 0.05616746465996 13.09 96.1862 /T 30.5/ 40.7 2018-Sep-18 00:00 269.87555 -27.69506 0.06160933624576 13.33 94.8381 /T 9.357/ 60.0 2018-Sep-20 00:00 269.59435 -49.85846 0.08247522545858 14.01 92.4335 /T 39.7/ 77.4 2018-Sep-22 00:00 269.32080 -62.02600 0.11027171363273 14.65 90.5063 /T 61.6/ 90.9 NEOWISE? 2018-Sep-24 00:00 269.05337 -69.11466 0.14086850433888 15.17 89.0331 /T 79.5/ 98.7 2018-Sep-26 00:00 268.79258 -73.63449 0.17268218691716 15.59 87.8303 /T 95.0/ 99.0 2018-Sep-28 00:00 268.54178 -76.73782 0.20503640323318 15.93 86.7883 /T 108.1/ 91.2 2018-Sep-30 00:00 268.30787 -78.99239 0.23759362639532 16.22 85.8486 /T 117.1/ 75.6 2018-Oct-02 00:00 268.10173 -80.70302 0.27015945900960 16.47 84.9791 /T 120.1/ 54.7 2018-Oct-04 00:00 267.93850 -82.04620 0.30260709004088 16.68 84.1612 /T 116.0/ 32.2 2018-Oct-06 00:00 267.83759 -83.13070 0.33484468355766 16.87 83.3841 /T 106.2/ 13.1 2018-Oct-08 00:00 267.82255 -84.02705 0.36680003584267 17.03 82.6411 /T 93.8/ 1.9 2018-Oct-10 00:00 267.92123 -84.78296 0.39841300587203 17.18 81.9278 /T 81.5/ 1.1 2018-Oct-12 00:00 268.16703 -85.43171 0.42963169924904 17.32 81.2414 /T 71.9/ 9.7 2018-Oct-14 00:00 268.60189 -85.99708 0.46041037888250 17.44 80.5801 /T 66.4/ 24.8 2018-Oct-16 00:00 269.28178 -86.49639 0.49070809966581 17.55 79.9427 /T 65.5/ 43.0
Setups
We don't know what to expect for the bandwidth of this object, but due to its large diameter, the bandwidth could be several tens of Hz. CW setup: --------------------------------------------------------------------------- TX polarization RCP RCV polarization LCP & RCP Frequency hops: no hopping Bandwidth: 5000 Hz TXoffset +500 Hz FFT 1000 for 5 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/data0/2004dv24/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
2004 DV24 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/2004DV24/2004DV24_planning.html
Asteroid Radar Astronomy