2013 FB8 Goldstone Radar Observations Planning
2013 FB8 was discovered by the Catalina Sky Survey on March 19, 2013. Its physical characteristics are effectivley unknown except for its absolute magnitude of 24.9, which suggests a diameter within a factor of two of about 30 meters. This asteroid will approach within 0.0108 AU (4.2 lunar distances) March 30. It should be a relatively strong radar target at Goldstone. We have one very short track to observe it at Goldstone on March 30 from 05:45-07:00 Z (22:45-0000 March 29-30 PDT). One very short track is also scheduled at Arecibo on April 1. Thank you to everyone who helped obtain astrometry for this asteroid!
Orbital and Physical Characteristics orbit type Apollo semimajor axis 1.343 AU eccentricity 0.320 inclination 2.0 deg perihelion distance 0.914 AU aphelion distance 1.773 AU absolute magnitude (H) 24.9 diameter 33 m +- a factor of two rotation period unknown pole direction unknown lightcurve amplitude unknown spectral class unknown Last update: 2013 Mar 29
M.P.E.C. 2013-F34 Issued 2013 Mar. 20, 17:08 UT The Minor Planet Electronic Circulars contain information on unusual minor planets and routine data on comets. They are published on behalf of Commission 20 of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A. Prepared using the Tamkin Foundation Computer Network MPC@CFA.HARVARD.EDU URL http://www.minorplanetcenter.net/ ISSN 1523-6714 2013 FB8 Observations: K13F08B* C2013 03 19.32271 11 59 27.24 +21 51 21.3 19.7 VuEF034703 K13F08B C2013 03 19.32498 11 59 27.49 +21 51 28.8 19.8 VuEF034703 K13F08B C2013 03 19.32722 11 59 27.67 +21 51 36.3 19.6 VuEF034703 K13F08B C2013 03 19.32946 11 59 27.85 +21 51 42.8 19.5 VuEF034703 K13F08B KC2013 03 19.34634 11 59 27.50 +21 52 11.1 19.3 RqEF034H36 K13F08B KC2013 03 19.35032 11 59 27.92 +21 52 21.5 19.7 RqEF034H36 K13F08B KC2013 03 19.35839 11 59 28.88 +21 52 46.1 18.5 RqEF034H36 K13F08B KC2013 03 19.39263211 59 32.08 +21 54 20.9 19.8 VuEF034H21 K13F08B KC2013 03 19.40091911 59 33.13 +21 54 44.5 19.7 VuEF034H21 K13F08B KC2013 03 19.40573111 59 33.74 +21 54 58.6 19.6 VuEF034H21 K13F08B KC2013 03 19.87187 12 01 07.20 +22 20 01.3 19.7 VtEF034A44 K13F08B KC2013 03 19.88007 12 01 08.33 +22 20 30.0 19.7 VtEF034A44 K13F08B KC2013 03 19.88827 12 01 09.46 +22 20 58.7 19.5 VtEF034A44 K13F08B KC2013 03 19.89722 12 01 10.68 +22 21 29.9 19.7 VtEF034A44 K13F08B KC2013 03 20.19822 12 02 11.11 +22 39 29.8 19.0 RoEF034291 K13F08B KC2013 03 20.19937 12 02 11.26 +22 39 34.3 18.9 RoEF034291 K13F08B KC2013 03 20.20052 12 02 11.43 +22 39 39.4 19.3 RoEF034291 Observer details: 291 LPL/Spacewatch II. Observer T. H. Bressi. 1.8-m f/2.7 reflector + CCD. 703 Catalina Sky Survey. Observer R. E. Hill. Measurers A. Boattini, E. J. Christensen, A. R. Gibbs, A. D. Grauer, R. E. Hill, J. A. Johnson, R. A. Kowalski, S. M. Larson, R. H. McNaught, F. C. Shelly. 0.68-m Schmidt + CCD. A44 Altschwendt. Observer W. Ries. 0.45-m f/4.5 reflector + CCD. H21 Astronomical Research Observatory, Westfield. Observer R. Holmes. Measurers S. Foglia, L. Buzzi, T. Linder, T. Vorobjov. 0.76-m f/3.0 astrograph + CCD. H36 Sandlot Observatory, Scranton. Observer G. Hug. 0.56-m reflector + CCD. Orbital elements: 2013 FB8 Earth MOID = 0.0104 AU Epoch 2013 Apr. 18.0 TT = JDT 2456400.5 MPC M 345.93052 (2000.0) P Q n 0.63205741 Peri. 213.72622 -0.50468421 +0.86314387 a 1.3447195 Node 25.97502 -0.78344461 -0.44982265 e 0.3214343 Incl. 2.17586 -0.36264085 -0.22943898 P 1.56 H 24.9 G 0.15 U 8 Residuals in seconds of arc 130319 703 0.3- 0.4+ 130319 H36 0.7+ 1.0- 130319 A44 0.2+ 0.1- 130319 703 0.0 1.0+ 130319 H21 0.4+ 0.3- 130319 A44 0.2+ 0.2- 130319 703 (0.6- 1.6+) 130319 H21 0.1+ 0.7- 130320 291 0.0 0.3- 130319 703 1.2- 1.2+ 130319 H21 0.2- 0.4- 130320 291 0.2- 0.2- 130319 H36 0.3+ 0.3- 130319 A44 0.2+ 0.2+ 130320 291 0.1- 0.6+ 130319 H36 (0.0 1.7-) 130319 A44 0.1+ 0.1+ Ephemeris: 2013 FB8 a,e,i = 1.34, 0.32, 2 q = 0.9125 Date TT R. A. (2000) Decl. Delta r Elong. Phase V 2013 02 18 11 33 44.3 +13 12 59 0.2106 1.1867 158.5 17.8 22.8 ... 2013 03 05 11 42 19.6 +15 38 27 0.1234 1.1121 166.4 12.1 21.3 ... 2013 03 13 11 48 37.3 +18 07 33 0.08283 1.0739 164.4 14.5 20.5 ... 2013 03 19 11 58 36.3 +21 35 33 0.05447 1.0466 159.0 19.9 19.7 2013 03 20 12 01 25.8 +22 28 39 0.04989 1.0422 157.8 21.2 19.5 2013 03 21 12 04 52.4 +23 31 02 0.04535 1.0378 156.3 22.7 19.3 ... 2013 03 27 13 07 26.8 +38 03 07 0.01967 1.0125 138.2 41.1 18.0 ... 2013 04 04 22 23 59.1 +09 40 58 0.02285 0.9819 37.0 142.2 23.8 ... 2013 04 19 23 19 49.6 -07 08 01 0.09100 0.9376 41.0 135.3 25.8 A. U. Tomatic (C) Copyright 2013 MPC M.P.E.C. 2013-F34
Target Name: 2013 FB8 D = 0.03 km Period = 0.5 h (we assume a relatively rapid rotation in order to estimate conservative SNRs) OC albedo = 0.1 UTC # SNR/ SNR/ w DOY start date rise set RA, dec dist runs day run 13 85 2013 Mar 26 02:28-14:27 193, +35 0.022 878 27 1 Observable at Arecibo 13 86 2013 Mar 27 02:34-15:07 199, +40 0.019 1084 58 2 Too far north for Arecibo 13 87 2013 Mar 28 02:50-16:21 211, +46 0.015 1379 130 4 Too far north for Arecibo 13 88 2013 Mar 29 03:35-18:35 234, +53 0.012 1763 300 8 Too far north for Arecibo 13 89 2013 Mar 30 05:42-20:57 274, +53 0.011 1944 460 10 Too far north for Arecibo 13 90 2013 Mar 31 08:47-21:54 306, +40 0.012 1642 330 9 Too far north for Arecibo 14 91 2013 Apr 01 10:39-22:10 321, +27 0.014 1262 160 5 Observable at Arecibo 14 92 2013 Apr 02 11:40-22:13 329, +18 0.017 972 70 2 14 93 2013 Apr 03 12:16-22:11 334, +12 0.021 771 32 1 Goldstone SNRs assume Ptx = 440 kW Arecibo SNRs : Tsys = 25 K, P = 800 kW, elev >= 70.31 deg start date window RA, dec dist runs SNR SNR/run ------------------------------------------------------------------------ 2013 Mar 23 03:23-05:58 184, +27 0.036 127 48 4 2013 Mar 24 03:30-05:58 186, +28 0.031 136 77 7 2013 Mar 25 03:43-05:57 189, +31 0.027 145 120 11 2013 Mar 26 04:09-05:53 192, +34 0.023 131 180 17 ...to far north for Arecibo to track from March 27-31... 2013 Apr 01 11:53-14:22 320, +29 0.014 299 1600 96 2013 Apr 02 12:13-15:02 329, +19 0.017 280 820 51 2013 Apr 03 12:35-15:13 334, +13 0.020 219 390 28 2013 Apr 04 12:54-15:14 337, +8 0.024 163 190 16 2013 Apr 05 13:10-15:09 340, +5 0.029 120 93 9 2013 Apr 06 13:25-15:01 342, +3 0.033 86 45 5 2013 Apr 07 13:39-14:50 343, +1 0.037 55 21 3 2013 Apr 08 13:56-14:35 344, -1 0.042 27 9 2
Goldstone track: *DAY START BOT EOT END FACILITY USER ACTIVITY 089 0430 0600 0700 0730 DSS-14 GSSR AST 2013 FB8 UT UT PST Duration Round-trip DOY Date TX Window TX Window hh:mm time (sec) SNR/Run --- ---- --------- --------- --------- --------- ------- 089 Mar 30 0545-0700 2245-0000 Mar 29-30 1:15 11 10 NOTE: TXON in the table above corresponds to when transmit authorization starts, and is 15 min before the end of precal time. Arecibo track: 91 Apr 01 1300-1422 0600-0722 Apr 01 1:22 14 96
From Jon Giorgini, 2013 Mar 29, Solution 12: New astrometry on 2013 FB8 last night extended the data arc to 145 measurements Mar 19-28. Orbit solution #12 was computed and found to have these 3-sigma X-band uncertainties: Date__(UT)__HR:MN POS_3sigma DOP_X_3sig RT_delay_3sig 2013-Mar-30 05:00 9.991 154.25 0.020989 2013-Mar-30 06:00 10.243 140.21 0.020928 2013-Mar-30 07:00 10.481 126.07 0.020873 - - - - - - - - - - - - - - From Jon Giorgini, 2013 Mar 28, Solution 10: Based on 139 optical measurments (Mar 19-27, 2013), 2013 FB8 orbit solution #10 was estimated. OSOD with nominal 14f-14-14 and 14v-14-14 predicts has been established on aardvark in the /2013fb8 sub-directory. Formal 3-sigma X-band uncertainties for .s10 during the allocated tracked (1 hour intervals): Date__(UT)__HR:MN POS_3sigma DOP_X_3sig RT_delay_3sig 2013-Mar-30 05:00 17.600 175.48 0.023009 2013-Mar-30 06:00 18.042 160.55 0.022939 2013-Mar-30 07:00 18.452 145.53 0.022876 - - - - - - - - - - - - - - From Horizons, 2013 Mar 28, Solution 8, # obs: 139 (8 days) Date__(UT)__HR:MN R.A._(J2000.0)_DEC. delta POS_3sigma DOP_S_3sig DOP_X_3sig RT_delay_3sig 2013-Mar-29 00:00 * 222.59553 50.20900 0.01319292605121 5.378 129.94 472.26 0.024583 2013-Mar-30 00:00 * 253.81752 54.23879 0.01124343271824 12.035 60.89 221.30 0.021027 2013-Mar-31 00:00 * 290.31229 47.75945 0.01094389564423 19.137 32.66 118.71 0.020467 2013-Apr-01 00:00 * 312.85163 34.73242 0.01241526810629 21.272 110.91 403.10 0.023126 2013-Apr-02 00:00 * 324.58652 23.49456 0.01515201978229 19.732 159.52 579.77 0.028114 2013-Apr-03 00:00 * 331.26197 15.60558 0.01860666623172 17.597 186.36 677.30 0.034441 2013-Apr-04 00:00 * 335.47849 10.18339 0.02245372175358 15.868 201.54 732.49 0.041509 2013-Apr-05 00:00 * 338.36717 6.35165 0.02652695059042 14.604 210.75 765.97 0.049007 2013-Apr-06 00:00 * 340.47053 3.54533 0.03074081735887 13.690 216.79 787.90 0.056776 - - - - - - - - - - - - - - - - - - - - From Horizos, 2013 Mar 27, Solution 7, # obs: 110 (7 days) Date__(UT)__HR:MN R.A._(J2000.0)_DEC. delta POS_3sigma DOP_S_3sig DOP_X_3sig RT_delay_3sig 2013-Mar-29 00:00 * 222.59492 50.20856 0.01318782093701 14.298 148.78 540.73 0.028133 2013-Mar-30 00:00 * 253.81576 54.23850 0.01123906902407 29.583 70.38 255.77 0.024062 2013-Mar-31 00:00 * 290.31024 47.75983 0.01093955219748 43.845 43.97 159.82 0.023416 2013-Apr-01 00:00 * 312.85024 34.73309 0.01241021227988 45.681 129.58 470.94 0.026479 2013-Apr-02 00:00 * 324.58561 23.49512 0.01514576298041 39.824 184.01 668.79 0.032224 2013-Apr-03 00:00 * 331.26135 15.60596 0.01859894334551 33.487 214.22 778.59 0.039500 2013-Apr-04 00:00 * 335.47804 10.18364 0.02244438984054 28.617 231.38 840.93 0.047616 2013-Apr-05 00:00 * 338.36684 6.35179 0.02651592684653 25.116 241.80 878.83 0.056221 2013-Apr-06 00:00 * 340.47028 3.54539 0.03072804952062 22.595 248.65 903.70 0.065133 The pointing uncertainties shrank by slightly more than another factor of two relative to solution 6. This may be good enough, but more astrometry would still improve the pointing and it will definitely improve the Doppler and time-delay uncertainties. - - - - - - - - - - - - - - - - - - - - From Horizons, 2013 Mar 26, Solution 6, # obs: 65 (6 days) Date__(UT)__HR:MN R.A._(J2000.0)_DEC. delta POS_3sigma DOP_S_3sig DOP_X_3sig RT_delay_3sig 2013-Mar-29 00:00 * 222.59456 50.20811 0.01318866191601 37.473 241.66 878.31 0.046135 2013-Mar-30 00:00 * 253.81439 54.23808 0.01123978488582 72.374 123.03 447.13 0.039413 2013-Mar-31 00:00 * 290.30840 47.75996 0.01094018806228 102.328 74.56 270.99 0.038010 2013-Apr-01 00:00 * 312.84882 34.73355 0.01241084244798 103.093 202.21 734.94 0.042560 2013-Apr-02 00:00 * 324.58455 23.49560 0.01514646555451 87.616 290.24 1054.86 0.051532 2013-Apr-03 00:00 * 331.26050 15.60637 0.01859977255350 72.179 340.20 1236.43 0.063050 2013-Apr-04 00:00 * 335.47734 10.18398 0.02244537769197 60.618 368.77 1340.29 0.075969 2013-Apr-05 00:00 * 338.36622 6.35208 0.02651709212273 52.402 386.17 1403.52 0.089701 2013-Apr-06 00:00 * 340.46973 3.54564 0.03072940378074 46.516 397.57 1444.93 0.103942 Astrometry reported after we requested more help via the MPML shrank the pointing uncertainties by about a factor of two. We still need more astrometry though. - - - - - - - - - - - - - - - - - - - - From Horizons, 2013 Mar 25: Solution 5, # obs: 61 (5 days) Date__(UT)__HR:MN R.A._(J2000.0)_DEC. delta POS_3sigma DOP_S_3sig DOP_X_3sig RT_delay_3sig 2013-Mar-29 00:00 * 222.59941 50.20937 0.01318663031991 84.579 275.23 1000.32 0.052531 2013-Mar-30 00:00 * 253.82466 54.23785 0.01123813842775 153.325 151.45 550.44 0.044848 2013-Mar-31 00:00 * 290.31863 47.75587 0.01093907230551 206.440 137.43 499.47 0.043268 2013-Apr-01 00:00 * 312.85533 34.72806 0.01241020679571 199.626 255.69 929.30 0.048751 2013-Apr-02 00:00 * 324.58878 23.49072 0.01514609914558 163.574 343.60 1248.81 0.059373 2013-Apr-03 00:00 * 331.26352 15.60240 0.01859949367693 130.318 395.60 1437.78 0.072819 2013-Apr-04 00:00 * 335.47967 10.18074 0.02244507471524 106.117 426.05 1548.45 0.087778 2013-Apr-05 00:00 * 338.36812 6.34937 0.02651670022589 89.161 444.85 1616.78 0.103612 2013-Apr-06 00:00 * 340.47134 3.54332 0.03072888420321 77.110 457.29 1661.99 0.119998 We are expecting additional optical astrometry that should shrink the uncertainties significantly. ********************************************************************************************** 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% 2013-Mar-25 00:00 187.85099 30.54531 0.02784072865649 18.50 147.5289 /L 40.3/ 93.2 2013-Mar-26 00:00 191.32637 33.68901 0.02372375611131 18.26 143.6912 /L 40.1/ 97.5 2013-Mar-27 00:00 196.66063 37.90638 0.01979901608112 18.01 138.3578 /L 44.7/ 99.7 2013-Mar-28 00:00 205.64515 43.56250 0.01619892073145 17.78 130.5194 /L 53.3/ 99.5 2013-Mar-29 00:00 222.49231 50.38129 0.01318570548733 17.67 118.5608 /L 64.6/ 96.7 2013-Mar-30 00:00 253.84270 54.45475 0.01123785233145 17.88 100.9546 /L 76.0/ 91.3 2013-Mar-31 00:00 290.48949 47.94725 0.01093913516157 18.69 79.5817 /L 82.6/ 83.8 2013-Apr-01 00:00 313.02566 34.86629 0.01241017126561 20.07 60.9113 /L 80.4/ 74.3 2013-Apr-02 00:00 324.72475 23.59281 0.01514566649776 n.a. 48.5426 /L 71.8/ 63.6 2013-Apr-03 00:00 331.37195 15.68182 0.01859854735823 n.a. 41.3625 /L 60.2/ 52.3 2013-Apr-04 00:00 335.56859 10.24515 0.02244358041554 n.a. 37.4081 /L 47.5/ 41.0 2013-Apr-05 00:00 338.44304 6.40328 0.02651465153813 n.a. 35.3273 /L 34.6/ 30.2 2013-Apr-06 00:00 340.53588 3.58952 0.03072628367598 n.a. 34.3352 /L 21.5/ 20.6 2013-Apr-07 00:00 342.13278 1.45995 0.03503223677841 n.a. 33.9893 /L 8.723/ 12.5 2013-Apr-08 00:00 343.39739 -0.19713 0.03940613303076 n.a. 34.0378 /L 5.113/ 6.3 2013-Apr-09 00:00 344.42975 -1.51632 0.04383223044315 n.a. 34.3337 /L 17.4/ 2.2 2013-Apr-10 00:00 345.29430 -2.58621 0.04830079739729 n.a. 34.7885 /L 29.9/ 0.2
We don't know anything about the spin state of 2013 FB8, so we're going to start with a standard CW setup in the hope that it produces an echo quickly and resolves it in frequency. In addition, the 3-sigma Doppler uncertainties are less than 180 Hz so our standard 4 kHz setup will be ideal. TX polarization RCP RCV polarization LCP & RCP Frequency hops: no hops Bandwidth: 4000 Hz TX Offset: +1000 Hz Sampling interval: 2500 x 0.1 usec PFS FFT: 4096 for 0.98-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 bin 64+16=80) --------------------------------------------------------------------------- 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 64+18=82) ------------------------------------------------------------------------- 1-usec baud 1 usec code 255 FFT 128 ncoh 6 bandwidth 654 Hz resolution 5.1 Hz TXOFF +80 Hz -> echo would be centered at 64 + 16 = 80 We're going to attempt 20 MHz chirping on Mar 9/10 track. If the SNRs are sufficiently strong, we hope to try 40 MHz chirping. 20 MHz chirp: ------------- sample clock at 40 MHz, prp 50 us, offset +40 Hz, 2000 bins in delay, FFT=500, ncoh=40 (0.025usx1 Hz) 40 MHz chirp: ------------- sample clock at 40 MHz, prp 50 us, offset +40 Hz, 2000 bins in delay, FFT=500, ncoh=40 (0.025usx1 Hz) _____________________________________________________________________ POSSIBLE RANGING SETUPS: (code=127, FFT=64, single-pol'n) These are from JX, w/ max-band (min-acc) options from Ray Jurgens. Currently configured for 5-sec records. _______________________________________________________________________ Setup Baud RP 1-acc 1-acc usec m usec band res acc band res _______________________________________________________________________ JX1XS110 11.000 1650 1397.0 715.8 11.2 2 358 5.6 JX1XS070 7.000 1050 889.0 1124.9 17.6 3 375 5.9 JX1XS020 2.000 300 254.0 3937.0 61.5 12 328 5.1 4 984 15.4 JX1XS010 1.000 150 127.0 7874.0 123.0 41 192 3.0 8 984 15.4 JX1XS005 0.500 75 63.5 15748.0 246.1 123 128 2.0 15 1050 16.4 JX1XS002 0.250 37.5 31.75 31496.1 492.1 492 64 1.0 30 1050 16.4 JX1XS001 0.125 18.75 15.875 62992.1 984.3 1970 32 0.5 60 1050 16.4 ____________________________________________________________________
OSOD and predicts are aardvark: Monostatic with the new waveform generator: /export/data3/osod/ops/2013fb8/PRDX.OUT.14v-14-14.s12 /PUNCH.OUT.14v-14-14.s12 /EPH.OUT.s12 POINTING TX Offsets Date (UTC) DOY hhmmss RA Dec Macro LHA Dec RTT OSOD 2013 03 30 089 050000 262.2885 53.9619 A 10.99 s12 2013 03 30 089 060000 263.9462 53.8600 A -5.00 -0.40 10.95 2013 03 30 089 070000 265.5855 53.7371 A 10.92 Transmit offsets are given in millidegrees.
PRDX.OUT.14f-14-14.s12 TRANSMITTER: STATION #14, RECEIVER: STATION #14 RECEIVER U.T. RANGE DOPPLER LHA DEC RA EL 2013 MAR 30 05:40 10.9669889342 89086.865 252.4957 53.8962 263.395 18.899 2013 MAR 30 05:50 10.9607832181 87979.970 254.7269 53.8784 263.671 19.980 2013 MAR 30 06:00 10.9546557092 86855.313 256.9587 53.8600 263.946 21.080 2013 MAR 30 06:10 10.9486076576 85712.728 259.1909 53.8410 264.221 22.200 2013 MAR 30 06:20 10.9426403265 84552.065 261.4237 53.8214 264.495 23.338 2013 MAR 30 06:30 10.9367549876 83373.201 263.6570 53.8013 264.768 24.494 2013 MAR 30 06:40 10.9309529204 82176.032 265.8909 53.7805 265.041 25.667 2013 MAR 30 06:50 10.9252354110 80960.478 268.1254 53.7591 265.314 26.856 2013 MAR 30 07:00 10.9196037502 79726.480 270.3604 53.7371 265.585 28.061
2013 FB8 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 183-610 | 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/2013FB8/2013FB8_planning.html