Goldstone Radar Observations Planning: 2004 FG11
2004 FG11 was discovered on Mar. 23, 2004 by LINEAR. This asteroid was found to be a binary by the Arecibo radar observations in 2012. Arecibo only obtained 75 m delay-Doppler images, which did not resolved the sizes of the components. The radar data only managed to put an upper bound on the size of the primary (D~150 m), that was later found to be consistent with the NEOWISE albedo estimates. The satellite is likely much smaller than 150 m in diameter. Together with 2003 SS84, 2004 FG11 is one of the smallest binaries observed to date. 2004 FG11 asteroid makes close approaches (~0.05 AU) every 2 years for the next decade, so we will have multiple opportunities to study this binary system. This year's close approach occurs on Apr 11 at 0.0527 AU (~20.5 lunar distances) when 2004 FG11 will be a weak target for both Arecibo and Goldstone due to both observatories running at half power due to klystrons problems. If detectable at all, 2004 FG11 will be cw-only target at Goldstone, but Arecibo may be able to obtain some coarse (75 m) delay-Doppler images. The Minor Planet Center has classified 2004FG11 as a "Potentially Hazardous Asteroid."
Orbital and Physical Characteristics Provisional Designation 2004 FG11 Asteroid number 363599 Discoverer LINEAR Discovery date 2004 Mar 23 orbit type Apollo Close approach dist. 0.053 AU Close approach dist. 20.5 LD Close approach date Apr 11 semimajor axis 1.588 AU eccentricity 0.724 inclination 3.1 deg perihelion distance 0.438 AU aphelion distance 2.738 AU Tisserand parameter 4.04 absolute magnitude (H) 21.0 diameter 0.15 km (Taylor et al., 2012 (radar data, Mainzer et al., 2013, NEOWISE data) optical albedo 0.306 (Mainzer et al., 2013, NEOWISE data) rotation period <4 h (based on Arecibo BW of ~ 1-1.2 Hz) satellite orbital period 20 h (Taylor et al., 2003, result based on less than full coverage, so the period may be wrong by 30 percent or so.) pole direction unknown lightcurve amplitude unknown spectral class V (M. Hicks, et al., 2010) PHA Last update: 2014 Apr 08
2004FG11 http://www.minorplanetcenter.org/mpec/K04/K04F60.html
GOLDSTONE SNRS Assumptions: D = 0.15 km, P = 4.0 h, OC albedo = 0.1 w DOY start date window RA, dec dist runs SNR/date SNR/run 15 98 2014 Apr 8 05:35-16:53 247, +26 0.069 301 4 0 15 99 2014 Apr 9 05:50-17:50 257, +32 0.061 360 6 0 15 100 2014 Apr 10 06:19-19:09 271, +39 0.055 421 10 1 15 101 2014 Apr 11 07:11-20:46 291, +44 0.053 460 12 1 15 102 2014 Apr 12 08:30-22:12 314, +46 0.055 450 11 1 15 103 2014 Apr 13 09:55-23:07 334, +43 0.060 398 7 0 15 104 2014 Apr 14 11:03-23:39 347, +39 0.069 338 4 0 Goldstone SNRs assume Ptx = 210 kW due to klystron problems ARECIBO SNRS start date window RA, dec dist runs SNR/date SNR/run 2014 Apr 3 05:40-08:01 227, +9 0.131 32 4 1 2014 Apr 4 05:40-08:10 229, +11 0.118 37 6 1 2014 Apr 5 05:42-08:21 232, +13 0.105 44 9 1 2014 Apr 6 05:48-08:33 235, +16 0.093 52 15 2 2014 Apr 7 06:01-08:49 240, +20 0.081 60 26 4 Scheduled...cancelled 2014 Apr 8 06:25-09:06 246, +25 0.071 66 44 6 Scheduled. 2014 Apr 9 07:11-09:24 255, +31 0.062 62 64 9 Scheduled. .... asteroid is north of the Arecibo declination window 2014 Apr 15 13:49-15:18 355, +35 0.077 33 18 3 Scheduled. 2014 Apr 16 13:51-15:59 1, +32 0.089 42 15 3 Scheduled. 2014 Apr 17 13:57-16:22 6, +29 0.101 42 10 2 2014 Apr 18 14:01-16:37 10, +27 0.114 40 7 1 2014 Apr 19 14:05-16:46 12, +25 0.127 37 4 1 2014 Apr 20 14:08-16:52 14, +23 0.140 34 3 1 Arecibo SNRs assume Ptx = 400 kW due to a single klystron operation mode and Tsys = 23 K.
Track Assignments
Goldstone tracks: UT UT PDT Duration Round-trip Target DOY Date TX Window TX Window hh:mm time (sec) 2004 FG11 099 Apr 09 1310-1710 0610-1010 Apr 09 04:00 59.9 2004 FG11 100 Apr 10 1500-1800 0800-1100 Apr 10 03:00 54.3 Start times refer to the start of the radiation clearances. The precal starts ~30 min before. Arecibo tracks: UT UT PDT Duration Round-trip Target DOY Date TX Window TX Window hh:mm time (sec) 2004 FG11 097 Apr 07 0601-0849 2301-0149 Apr 6/7 02:48 81.3 2004 FG11 098 Apr 08 0625-0906 2325-0206 Apr 7/8 02:41 71.0 2004 FG11 099 Apr 09 0711-0924 0011-0224 Apr 9 02:13 62.0 2004 FG11 104 Apr 15 1349-1518 0649-0818 Apr 15 01:29 77.1 2004 FG11 105 Apr 16 1351-1559 0651-0859 Apr 16 02:08 88.6
Uncertainties
From Jon Giorgini, 2014 Apr 08: Based on 154 optical measurements (2004-Mar-23 to 2014-Apr-6) and two delay measurements from Arecibo in 2012 (no Arecibo data has been reported so far for the current apparition), orbit solution #35 was estimated. Formal 3-sigma X-band uncertainties for s35: Date__(UT)__HR:MN POS_3sigma DOP_X_3sig RT_delay_3sig 2014-Apr-09 00:00 0.915 6.31 0.000039 2014-Apr-10 00:00 1.037 5.50 0.000084 2014-Apr-11 00:00 1.149 3.57 0.000125 - - - - - - - - - - - - - - - - JPL/Horizons solution 30, # obs: 148, 2 radar delays (2004-2014) Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_S_3sig DOP_X_3sig RT_delay_3sig 2014-Apr-06 00:00 234.19943 15.27736 0.09639338243437 0.681 1.65 6.00 0.000176 2014-Apr-07 00:00 238.28967 18.92854 0.08472975508063 0.794 1.73 6.27 0.000117 2014-Apr-08 00:00 243.87173 23.53075 0.07403835463819 0.929 1.79 6.49 0.000060 2014-Apr-09 00:00 251.77185 29.21662 0.06478096159932 1.079 1.77 6.44 0.000040 2014-Apr-10 00:00 263.25297 35.74535 0.05763500713140 1.227 1.55 5.65 0.000084 2014-Apr-11 00:00 279.67602 41.92316 0.05344245694635 1.357 1.03 3.73 0.000126 2014-Apr-12 00:00 300.56639 45.49610 0.05290618542501 1.461 0.58 2.09 0.000144 2014-Apr-13 00:00 321.54173 45.07954 0.05613530771410 1.524 1.00 3.65 0.000132 2014-Apr-14 00:00 338.12395 41.86960 0.06256075956320 1.524 1.41 5.12 0.000103 2014-Apr-15 00:00 349.73238 37.82927 0.07134099253983 1.472 1.58 5.73 0.000080 2014-Apr-16 00:00 357.71122 34.03136 0.08174205513083 1.395 1.61 5.85 0.000089 2014-Apr-17 00:00 3.33648 30.79115 0.09324803507222 1.313 1.59 5.77 0.000126 2014-Apr-18 00:00 7.44697 28.10996 0.10552588891011 1.235 1.55 5.65 0.000174 2014-Apr-19 00:00 10.55606 25.90166 0.11836585797419 1.164 1.52 5.53 0.000225 2014-Apr-20 00:00 12.98003 24.07252 0.13163589343076 1.102 1.50 5.44 0.000276 2014-Apr-21 00:00 14.91951 22.54302 0.14525247878853 1.048 1.48 5.37 0.000328 2014-Apr-22 00:00 16.50619 21.25055 0.15916287329480 1.000 1.47 5.33 0.000380 2014-Apr-23 00:00 17.82940 20.14710 0.17333436194419 0.958 1.46 5.32 0.000432 2014-Apr-24 00:00 18.95165 19.19599 0.18774766223681 0.921 1.47 5.33 0.000485 ********************************************************************************************** Apparent Magnitudes, Solar Elongations, Lunar Elongations, and Lunar Illumination: Date__(UT)__HR:MN R.A._(J2000.0)_DEC. delta APmag S-O-T /r T-O-M/Illu% 2014-Mar-25 00:00 217.91028 -0.04379 19.75 0.26231052171429 145.7797 /L 70.1/ 39.6 2014-Mar-26 00:00 218.48380 0.45877 19.61 0.24758559215245 146.0637 /L 83.5/ 28.6 2014-Mar-27 00:00 219.11126 1.02333 19.46 0.23297645349687 146.2638 /L 97.0/ 18.7 2014-Mar-28 00:00 219.80388 1.66116 19.30 0.21848837426182 146.3622 /L 110.4/ 10.4 2014-Mar-29 00:00 220.57594 2.38645 19.14 0.20412844415776 146.3366 /L 123.6/ 4.4 2014-Mar-30 00:00 221.44591 3.21729 18.98 0.18990626384320 146.1588 /L 136.0/ 0.9 2014-Mar-31 00:00 222.43803 4.17704 18.81 0.17583496793015 145.7921 /L 147.2/ 0.1 2014-Apr-01 00:00 223.58464 5.29629 18.63 0.16193276615608 145.1890 /L 155.5/ 1.9 2014-Apr-02 00:00 224.92987 6.61560 18.44 0.14822529957302 144.2864 /L 158.5/ 6.0 2014-Apr-03 00:00 226.53524 8.18954 18.26 0.13474930327599 142.9993 /L 154.8/ 12.1 2014-Apr-04 00:00 228.48884 10.09229 18.06 0.12155841207268 141.2116 /L 147.4/ 19.6 2014-Apr-05 00:00 230.92060 12.42521 17.87 0.10873255198773 138.7618 /L 138.8/ 28.1 2014-Apr-06 00:00 234.02850 15.32565 17.68 0.09639338243437 135.4226 /L 130.1/ 37.3 2014-Apr-07 00:00 238.12448 18.97219 17.50 0.08472975508063 130.8739 /L 122.2/ 46.8 2014-Apr-08 00:00 243.71468 23.56778 17.36 0.07403835463819 124.6788 /L 115.5/ 56.2 2014-Apr-09 00:00 251.62634 29.24372 17.29 0.06478096159932 116.3010 /L 110.9/ 65.5 2014-Apr-10 00:00 263.12271 35.75723 17.35 0.05763500713140 105.2752 /L 109.5/ 74.2 2014-Apr-11 00:00 279.56044 41.91267 17.64 0.05344245694635 91.6861 /L 112.1/ 82.1 2014-Apr-12 00:00 300.45180 45.45870 18.24 0.05290618542501 76.7480 /L 118.5/ 88.9 2014-Apr-13 00:00 321.40877 45.02015 19.16 0.05613530771410 62.5085 /L 127.0/ 94.3 2014-Apr-14 00:00 337.96903 41.79841 20. 0.06256075956320 50.5168 /L 135.1/ 98.1 2014-Apr-15 00:00 349.56244 37.75340 22. 0.07134099253983 41.1439 /L 140.7/ 99.9 2014-Apr-16 00:00 357.53267 33.95414 23. 0.08174205513083 34.0289 /L 142.0/ 99.5 2014-Apr-17 00:00 3.15315 30.71392 24. 0.09324803507222 28.6420 /L 138.4/ 96.8 2014-Apr-18 00:00 7.26095 28.03323 25. 0.10552588891011 24.5294 /L 131.0/ 91.7 2014-Apr-19 00:00 10.36848 25.82557 26. 0.11836585797419 21.3589 /L 121.1/ 84.5 2014-Apr-20 00:00 12.79154 23.99711 27. 0.13163589343076 18.8998 /L 109.8/ 75.5 2014-Apr-21 00:00 14.73048 22.46823 28. 0.14525247878853 16.9945 /L 97.6/ 65.1 2014-Apr-22 00:00 16.31685 21.17635 28. 0.15916287329480 15.5348 /L 84.9/ 53.9 2014-Apr-23 00:00 17.63991 20.07344 29. 0.17333436194419 14.4441 /L 71.8/ 42.4 2014-Apr-24 00:00 18.76210 19.12282 29. 0.18774766223681 13.6660 /L 58.6/ 31.3
Setups
Expected BW for the primary of 2004 FG11 is ~4 Hz at X-band. 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: 8000 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 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/data0/2004fg11/raw/
2004FG11 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
2004FG11 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/2000RS11/2000_RS11.lanning.html
Asteroid Radar Astronomy