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2005 wc1 asteroid.december 15.
2005 WC1 Planning
Background Instructions Goldstone Masterlog Background 2005 WC1 was discovered by LINEAR on November 21, 2005. It will approach within 0.020 AU (7.7 lunar distances) on December 14. Its physical properties are unknown, but its absolute magnitude of 20.5 suggests a diameter within a factor of two of 250 m. Update on 2005 December 14: Arecibo obseravations this morning revealed a bandwidth of about 2.5 Hz and a diameter of roughly 300 meters, suggesting a rotation period in the realm of 3 - 4 hours. Due to the proximity of its approach and its size, 2005 WC1 will be a strong radar target. Goldstone observations are scheduled on December 15 in one very short track, and Arecibo observations are scheduled on December 14. 2005 WC1 has been classified as a "Potentially Hazardous Asteroid" by the International Astronomical Union's Minor Planet Center. Orbital and Physical Characteristics orbit type Apollo semimajor axis 1.402 AU eccentricity 0.487 inclination 20.0° perihelion distance 0.719 AU aphelion distance 2.085 AU absolute magnitude (H) 20.5 diameter 250 meters +/- a factor of two rotation period unknown pole direction unknown lightcurve amplitude unknown spectral class unknown Last updated: 2005 December 15 Discovery SNR Calculation Goldstone Track Assignments Uncertainties Setups Discovery M.P.E.C. 2005-W36 Issued 2005 Nov. 22, 12:46 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. Supported in part by the Brinson Foundation Supported in part by the TABASGO Foundation Prepared using the Tamkin Foundation Computer Network URL http://cfa-www.harvard.edu/iau/mpc.html ISSN 1523-6714 2005 WC1 Observations: K05W01C* C2005 11 21.31647 05 52 32.55 +63 13 50.9 18.8 EW036704 K05W01C C2005 11 21.32913 05 52 33.92 +63 14 04.3 19.1 EW036704 K05W01C C2005 11 21.35440 05 52 36.72 +63 14 30.7 19.3 EW036704 K05W01C C2005 11 22.23610 05 54 39.00 +63 29 28.7 19.3 R EW036651 K05W01C C2005 11 22.23978 05 54 39.35 +63 29 33.2 19.3 R EW036651 K05W01C C2005 11 22.24437 05 54 39.99 +63 29 38.1 19.3 R EW036651 K05W01C C2005 11 22.30892 05 54 45.98 +63 30 50.7 18.7 R EW036734 K05W01C C2005 11 22.31479 05 54 46.74 +63 30 56.9 18.5 R EW036734 K05W01C C2005 11 22.31921 05 54 47.21 +63 31 01.2 18.6 R EW036734 K05W01C 5C2005 11 22.45382 05 55 03.89 +63 33 24.0 18.0 R EW036673 K05W01C 5C2005 11 22.46308 05 55 04.91 +63 33 33.2 EW036673 K05W01C 5C2005 11 22.46852 05 55 05.54 +63 33 38.5 EW036673 K05W01C 5C2005 11 22.47245 05 55 05.98 +63 33 42.3 EW036673 Observer details: 651 Grasslands Observatory, Tucson. Observer J. E. McGaha. 0.62-m f/5.1 Newtonian reflector + CCD. 673 Table Mountain Observatory, Wrightwood. Observer J. Young. 0.6-m f/16 Cassegrain + CCD. 704 Lincoln Laboratory ETS, New Mexico. Observers M. Bezpalko, L. Manguso, D. Torres, R. Kracke, A. Milner, H. Love. Measurers J. Stuart, R. Sayer, J. Evans, J. Kommers. 1.0-m f/2.15 reflector + CCD. 734 Farpoint Observatory. Observer G. Hug. 0.7-m reflector + CCD. Orbital elements: 2005 WC1 PHA 0.031 Epoch 2005 Nov. 6.0 TT = JDT 2453680.5 MPC M 306.79968 (2000.0) P Q n 0.59785383 Peri. 254.73165 -0.89192527 -0.30996672 a 1.3955306 Node 266.32217 +0.42130618 -0.83408641 e 0.4747118 Incl. 19.26305 -0.16422674 -0.45631184 P 1.65 H 20.4 G 0.15 From 13 observations 2005 Nov. 21-22. Ephemeris: 2005 WC1 a,e,i = 1.40, 0.47, 19 q = 0.7331 Date TT R. A. (2000) Decl. Delta r Elong. Phase V 2005 11 16 05 41.98 +61 47.7 0.298 1.205 130.7 38.5 19.7 2005 11 17 05 43.82 +62 03.3 0.288 1.197 131.0 38.6 19.6 2005 11 18 05 45.72 +62 19.1 0.277 1.189 131.2 38.7 19.5 2005 11 19 05 47.68 +62 35.2 0.267 1.182 131.4 38.9 19.4 2005 11 20 05 49.71 +62 51.6 0.256 1.174 131.6 39.0 19.3 2005 11 21 05 51.83 +63 08.2 0.246 1.166 131.7 39.2 19.2 2005 11 22 05 54.04 +63 25.2 0.236 1.158 131.9 39.4 19.1 2005 11 23 05 56.38 +63 42.7 0.226 1.151 132.0 39.6 19.0 2005 11 24 05 58.86 +64 00.6 0.215 1.143 132.1 39.9 18.9 2005 11 25 06 01.51 +64 19.1 0.205 1.135 132.1 40.2 18.8 2005 11 26 06 04.37 +64 38.3 0.195 1.127 132.2 40.5 18.7 2005 11 27 06 07.48 +64 58.2 0.185 1.119 132.1 40.8 18.6 2005 11 28 06 10.90 +65 19.0 0.175 1.112 132.1 41.2 18.5 2005 11 29 06 14.69 +65 40.9 0.165 1.104 132.0 41.6 18.3 2005 11 30 06 18.94 +66 04.0 0.155 1.096 131.9 42.1 18.2 2005 12 01 06 23.78 +66 28.6 0.145 1.088 131.7 42.6 18.0 2005 12 02 06 29.37 +66 54.9 0.135 1.080 131.4 43.2 17.9 2005 12 03 06 35.93 +67 23.1 0.126 1.072 131.0 43.9 17.7 2005 12 04 06 43.75 +67 53.7 0.116 1.065 130.5 44.7 17.6 2005 12 05 06 53.27 +68 26.7 0.106 1.057 129.9 45.6 17.4 2005 12 06 07 05.13 +69 02.4 0.0963 1.049 129.2 46.7 17.2 2005 12 07 07 20.27 +69 40.4 0.0866 1.041 128.2 48.1 17.0 2005 12 08 07 40.17 +70 19.5 0.0771 1.033 126.9 49.7 16.8 2005 12 09 08 07.05 +70 55.7 0.0676 1.025 125.1 51.8 16.5 2005 12 10 08 44.21 +71 18.9 0.0583 1.018 122.8 54.5 16.3 2005 12 11 09 35.54 +71 04.4 0.0492 1.010 119.4 58.1 16.0 2005 12 12 10 42.56 +69 16.7 0.0405 1.002 114.5 63.4 15.7 2005 12 13 11 58.32 +64 09.8 0.0325 0.994 106.8 71.5 15.4 2005 12 14 13 08.38 +53 02.6 0.0257 0.987 94.3 84.2 15.4 2005 12 15 14 03.39 +33 26.9 0.0214 0.979 75.0 103.8 15.8 2005 12 16 14 43.48 +08 24.4 0.0213 0.971 52.4 126.6 17.4 Timothy B. Spahr (C) Copyright 2005 MPC M.P.E.C. 2005-W36 SNR Calculation Target Name: 2005 WC1 HMag: 20.5 Diameter: 0.25 km (a standard guess assuming an S-class optical albedo) Period: 4 (a standard guess) -------GOLDSTONE------- -------ARECIBO-------- Max Max Dat Run UTC Dat Run UTC Date RA Decl Delta Runs SNR SNR Window Runs SNR SNR Window 2005 12 9 128 71 0.060 631 41 2 1:42-20:36 0 0 0 - 2005 12 10 140 71 0.050 700 80 4 2:30-21:23 0 0 0 - 2005 12 11 157 70 0.041 700 167 7 4:00-22:00 0 0 0 - 2005 12 12 178 65 0.032 700 389 16 6:12-22:23 0 0 0 - 2005 12 13 197 54 0.025 700 947 39 8:30-22:23 0 0 0 - 2005 12 14 212 34 0.021 700 1839 76 10:35-22:11 124 14800 1530 12:11-14:00 2005 12 15 222 7 0.021 616 1705 75 12:24-21:41 142 17200 1560 12:35-14:48 2005 12 16 229 -15 0.025 412 639 35 14:05-20:53 0 0 0 - 2005 12 17 235 -28 0.033 243 174 12 15:41-19:48 0 0 0 - 2005 12 18 239 -36 0.041 112 45 4 - 0 0 0 - 2005 12 19 242 -42 0.050 0 0 0 - 0 0 0 - Arecibo SNRs have been adjusted to reflect current transmitter power of about 500 kW. However, 2005 WC1 moves so fast that it goes through Arecibo's declination window in only one day, contrary to what is shown for 00:00:00 UTC on each day above. Goldstone Track Assignments 2005 WC1 Goldstone track UT UT PST Duration DOY Date TX Window TX Window AST TX Window (hh:mm) --- ---- ------ ------ ------ ------- 349 Dec 15 1315-1530 0515-0730 0915-1130 2:15 Arecibo track 348 Dec 14 1201-1451 0401-0651 0801-1051 2:50 Uncertainties From Horizons: 2005 November 28, solution #5 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_S-sig DOP_X-sig RT_delay-sig 2005-Dec-10 00:00 *m 139.96066 71.34055 0.050452858840 838.423770 9030.72 32300.11 2.523742 2005-Dec-11 00:00 *m 156.90637 70.02419 0.041320428902 1441.09795 8570.81 30655.15 2.193273 2005-Dec-12 00:00 *m 177.04709 65.47657 0.032823254516 2608.64312 7703.29 27552.29 1.861384 2005-Dec-13 00:00 *m 196.17659 54.66082 0.025601044804 4856.56424 5921.81 21180.47 1.509142 2005-Dec-14 00:00 *m 211.10588 34.48179 0.021016811103 8098.69785 2393.90 8562.23 1.106349 2005-Dec-15 00:00 *m 221.74116 7.99462 0.020896126127 9142.83005 2446.89 8751.76 0.755140 2005-Dec-16 00:00 * 229.23752 -13.92680 0.025315024229 6908.49306 6036.49 21590.66 0.700693 2005-Dec-17 00:00 * 234.64663 -27.69824 0.032482913662 4626.75432 7846.19 28063.41 0.849101 2005-Dec-18 00:00 * 238.67710 -36.02539 0.040994644174 3186.40442 8718.51 31183.42 1.074478 - - - - - - - - - - - - - - - - - - - - - - - - - - -- From Horizons: 2005 December 6, solution #9, #obs: 50 (14 days) 2005-Dec-10 00:00 *m 140.26964 71.33398 0.050054603337 69.4748773 2990.92 10697.61 0.695027 2005-Dec-11 00:00 *m 157.36270 69.96707 0.040943560459 135.274473 2837.44 10148.66 0.586964 2005-Dec-12 00:00 *m 177.59518 65.29141 0.032478736279 271.079804 2545.77 9105.45 0.483577 2005-Dec-13 00:00 *m 196.69200 54.21812 0.025316147484 548.340417 1943.33 6950.69 0.387361 2005-Dec-14 00:00 *m 211.52228 33.68478 0.020849082271 973.312217 752.09 2689.98 0.303795 2005-Dec-15 00:00 *m 222.06257 7.09839 0.020895157107 1147.19824 856.82 3064.58 0.253665 2005-Dec-16 00:00 * 229.48753 -14.58332 0.025441967163 903.572449 2027.57 7251.99 0.264268 2005-Dec-17 00:00 * 234.84597 -28.12157 0.032673737988 632.368410 2613.90 9349.12 0.324450 2005-Dec-18 00:00 * 238.84036 -36.30543 0.041212802032 454.208263 2897.27 10362.65 0.410952 - - - - - - - - - - - - - - - - - - - - - - - - - - -- From Horizons: 2005 December 7, solution #10, #obs: 60 (15 days) 2005-Dec-10 00:00 *m 140.27494 71.33360 0.049996107867 23.1944398 1715.76 6136.73 0.377651 2005-Dec-11 00:00 *m 157.37150 69.96557 0.040894037261 47.8071916 1628.09 5823.19 0.316185 2005-Dec-12 00:00 *m 177.60680 65.28677 0.032437829741 99.9616706 1461.25 5226.44 0.258061 2005-Dec-13 00:00 *m 196.70385 54.20647 0.025283338080 208.956998 1116.20 3992.30 0.205733 2005-Dec-14 00:00 *m 211.53255 33.66234 0.020823481706 380.693843 433.28 1549.72 0.164331 2005-Dec-15 00:00 *m 222.07101 7.07142 0.020874181054 458.292856 489.48 1750.71 0.145595 2005-Dec-16 00:00 * 229.49448 -14.60448 0.025420555002 367.512395 1161.11 4152.94 0.159842 2005-Dec-17 00:00 * 234.85180 -28.13621 0.032647604573 261.286644 1497.71 5356.86 0.198905 2005-Dec-18 00:00 * 238.84537 -36.31580 0.041179642932 190.301869 1660.57 5939.36 0.250937 - - - - - - - - - - - - - - - - - - - - - - - - - - -- From Jon Giorgini: 2005 December 12: With 112 optical observations (2005-Nov-21 to 2005-Dec-11), 2005 WC1 solution #14 was computed and found to have 3-sigma S & X-band uncertainties as shown below. Date__(UT)__HR:MN POS_3sigma DOP_S-sig DOP_X-sig RT_delay-sig 2005-Dec-13 00:00 6.55801780 345.51 1235.79 0.054064 2005-Dec-14 00:00 15.4333261 136.04 486.58 0.044595 2005-Dec-15 00:00 22.4163516 147.60 527.93 0.044058 2005-Dec-16 00:00 20.8043306 354.85 1269.18 0.052771 - - - - - - - - - - - - - - - - - - - - - - - - - - -- From Jon Giorgini: 2005 December 14: With the 3 Dopplers and 1 delay from Arecibo, combined with 118 optical observations spanning 2005-Nov-21 to 2005-Dec-12, 2005 WC1 solution #22 was computed. 3-sigma X-band (and S-band) uncertainties are shown below: Date__(UT)__HR:MN POS_3sigma DOP_S-sig DOP_X-sig RT_delay-sig 2005-Dec-13 00:00 1.13341184 2.12 7.59 0.000094 2005-Dec-14 00:00 1.53456909 1.32 4.72 0.000026 2005-Dec-15 00:00 2.02094945 0.39 1.38 0.000021 2005-Dec-16 00:00 2.14474682 1.12 4.02 0.000105 Setups CW Setup Arecibo observations on December 14 revealed an S-band bandwidth of about 2.5 Hz and a visible range extent of about 150 m, so the X-band bandwidth could be close to 9 Hz and the diameter close to 300 meters. Given that the ephemeris uncertainties are now small, we'll start with the following cw setup for about ten minutes, and then we'll go to 1/8 usec imaging. Note: the round-trip time is only about 23 seconds, so we may not get two complete hops per run. TX polarization RCP RCV polarization LCP Frequencies: 2 Dwell: 10 seconds Bandwidth: 4000 Hz Sampling interval: 2500 x 0.1 usec VME FFT for PSD files: 8192 for 0.488-Hz resolution Possible ranging setups: ------------------------------------------------------ 127 x 64 10-usec single sample baud 10 usec code 127 gates 127 FFT 64 CLT 11 ncoh 2 bandwidth 394 Hz resolution 6.15 Hz TXOFF +60 Hz - echo will be centered at +9.75 bins or in bin 32+10 = 42 incoh sums 64 = 10.4 sec/record ------------------------------------------------------ 127 x 64 11-usec single sample, 5.6-Hz resolution. baud 11 usec code 127 gates 127 PRP 1397 FFT 64 CLT 11 ncoh 2 bandwidth 357.9 Hz resolution 5.59 Hz TXOFF TBD ------------------------------------------------------ 127 x 64 11-usec single sample, 11.2-Hz resolution baud 11 usec code 127 gates 127 PRP 1397 FFT 64 CLT 11 ncoh 1 bandwidth 715.8 Hz resolution 11.2 Hz TXOFF +60 - echo would be centered at +5 bins w/perfect ephemeris ------------------------------------------------------ 127 x 64 7-usec single sample ------------------------------ baud 7 usec code 127 gates 127 PRP 889 FFT 64 CLT 11 ncoh 1 bandwidth 1124.9 Hz resolution 17.6 Hz TXOFF +60 - echo would be centered at +3.4 bins w/perfect ephemeris ------------------------------------------------------ 127 x 64 1-usec single sample ------------------------------ baud 1 usec code 127 gates 127 PRP 127 FFT 64 CLT 13 & 14, about evenly divided ncoh 15 bandwidth 525 Hz resolution 8.2 Hz TXOFF +50 - echo would be centered at +6.1 bins w/perfect ephemeris ------------------------------------------------------ 0.125-usec ranging setup used in first UY4 track (DOY 213, Aug. 1) ------------------ setup JX1XS001 revised baud 0.125 usec code 127 gates 127 FFT 64 ncoh 984 bandwidth 64.016384 Hz resolution 1.000256 Hz TXOFF We used 10 Hz, placing COM in cell 32+10=42 Henceforth use 15 Hz, to put COM in 32+15=47 incoh sums 4 looks= 8 sec/record = expect records per run ~ RTT/8 PFS CLT gate 21 __________________________________________________ ___ 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 __________________________________________________ ___ Instructions NOTE: Data should be moved to the appropriate subdirectories in stealth:/export/data0/rosema/2005WC1/raw/ 2005 WC1 POINTING: OSOD and predicts are at Goldstone on stealth: /export/data2/osod/ops/2005wc1/PRDX.OUT.s22 /PUNCH.OUT.s22 /EPH.OUT.s22 and have been copied to: /export/data0/rosema/2005WC1/support/ POINTING TX Offsets Date (UTC) DOY hhmmss RA Dec Macro LHA Dec RTT OSOD 2005 12 15 349 130000 226.5569 -5.7222 A 22.8 22 2005 12 15 349 140000 226.8447 -6.6088 A 23.0 2005 12 15 349 150000 227.1241 -7.4795 A -0.0018 -0.0056 23.3 2005 12 15 349 160000 227.3964 -8.3342 A 23.4 2005 12 15 349 170000 227.6630 -9.1725 A 23.7 PRDX.OUT.s22 TRANSMITTER: STATION #14, RECEIVER: STATION #14 RECEIVER U.T. RANGE DOPPLER LHA DEC RA EL 2005 DEC 15 13:10 22.8767695535 -457631.682 298.2930 -5.8711 226.605 18.960 2005 DEC 15 13:20 22.9089476356 -460520.116 300.7515 -6.0195 226.654 20.706 2005 DEC 15 13:30 22.9413289889 -463431.435 303.2102 -6.1674 226.702 22.424 2005 DEC 15 13:40 22.9739151788 -466364.720 305.6693 -6.3150 226.750 24.111 2005 DEC 15 13:50 23.0067077111 -469318.993 308.1285 -6.4621 226.797 25.765 2005 DEC 15 14:00 23.0397080282 -472293.217 310.5880 -6.6087 226.845 27.383 2005 DEC 15 14:10 23.0729174835 -475286.296 313.0477 -6.7550 226.892 28.959 2005 DEC 15 14:20 23.1063373659 -478297.084 315.5077 -6.9008 226.939 30.492 2005 DEC 15 14:30 23.1399688679 -481324.378 317.9678 -7.0461 226.985 31.977 2005 DEC 15 14:40 23.1738131028 -484366.927 320.4282 -7.1910 227.032 33.410 2005 DEC 15 14:50 23.2078710950 -487423.433 322.8888 -7.3355 227.078 34.785 2005 DEC 15 15:00 23.2421437830 -490492.552 325.3496 -7.4795 227.124 36.099 2005 DEC 15 15:10 23.2766320028 -493572.897 327.8106 -7.6231 227.170 37.346 2005 DEC 15 15:20 23.3113364769 -496663.042 330.2718 -7.7662 227.216 38.521 2005 DEC 15 15:30 23.3462578560 -499761.524 332.7332 -7.9089 227.261 39.618 GOLDSTONE MASTERLOG ========================= RCV file setup runs start -stop osod OFFSET TX Poln ----------------------------------------------------------------------------- December 15 (DOY 349) CW 2 hops, 4 kHz, 10s dwell 13 132514-133510 22 none RCP VME & PFS 1/8 us 127 code ncoh=1970 91 141741-153026 24 +7 Hz RCP VME & PFS ========================= RADAR ASTROMETRY 2005 12 15 13:30:00 P -463428.4D0 1.0 8560.D6 -14 -14 Benner, L.A.M. Correction of +3 Hz to soln 22 from 13 cw runs with 0.5 Hz resn. Bandwidth is about 8 Hz. ========================= PRELIMINARY IMAGING RESULTS Resolution: 0.125 usec (19 meters) x 0.25 Hz 14:17 - 14:34 UTC 14:34 - 14:47 UTC 14:47 - 15:02 UTC 15:02 - 15:15 UTC 15:15 - 15:30 UTC Dr. Lance A. M. Benner | PHONE: (818) 354-7412 Mail Stop 300-233 | FAX: (818) 354-9476 Jet Propulsion Laboratory | email: Pasadena, CA 91109-8099 | Plan: To live long and prosper http://echo.jpl.nasa.gov/asteroids/2...1_planninghtml Asteroid Radar Astronomy biking the year thru and not like years before. |
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2005 wc1 asteroid.december 15.
OK, I committed all the numbers and data to memory. What do I do now ?? Is
it time to by Saran Wrap and Duct Tape ?? Do I need to buy extra beer ?? "Biker Winterizer" wrote in message ... 2005 WC1 Planning Background Instructions Goldstone Masterlog Background 2005 WC1 was discovered by LINEAR on November 21, 2005. It will approach within 0.020 AU (7.7 lunar distances) on December 14. Its physical properties are unknown, but its absolute magnitude of 20.5 suggests a diameter within a factor of two of 250 m. Update on 2005 December 14: Arecibo obseravations this morning revealed a bandwidth of about 2.5 Hz and a diameter of roughly 300 meters, suggesting a rotation period in the realm of 3 - 4 hours. Due to the proximity of its approach and its size, 2005 WC1 will be a strong radar target. Goldstone observations are scheduled on December 15 in one very short track, and Arecibo observations are scheduled on December 14. 2005 WC1 has been classified as a "Potentially Hazardous Asteroid" by the International Astronomical Union's Minor Planet Center. Orbital and Physical Characteristics orbit type Apollo semimajor axis 1.402 AU eccentricity 0.487 inclination 20.0° perihelion distance 0.719 AU aphelion distance 2.085 AU absolute magnitude (H) 20.5 diameter 250 meters +/- a factor of two rotation period unknown pole direction unknown lightcurve amplitude unknown spectral class unknown Last updated: 2005 December 15 Discovery SNR Calculation Goldstone Track Assignments Uncertainties Setups Discovery M.P.E.C. 2005-W36 Issued 2005 Nov. 22, 12:46 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. Supported in part by the Brinson Foundation Supported in part by the TABASGO Foundation Prepared using the Tamkin Foundation Computer Network URL http://cfa-www.harvard.edu/iau/mpc.html ISSN 1523-6714 2005 WC1 Observations: K05W01C* C2005 11 21.31647 05 52 32.55 +63 13 50.9 18.8 EW036704 K05W01C C2005 11 21.32913 05 52 33.92 +63 14 04.3 19.1 EW036704 K05W01C C2005 11 21.35440 05 52 36.72 +63 14 30.7 19.3 EW036704 K05W01C C2005 11 22.23610 05 54 39.00 +63 29 28.7 19.3 R EW036651 K05W01C C2005 11 22.23978 05 54 39.35 +63 29 33.2 19.3 R EW036651 K05W01C C2005 11 22.24437 05 54 39.99 +63 29 38.1 19.3 R EW036651 K05W01C C2005 11 22.30892 05 54 45.98 +63 30 50.7 18.7 R EW036734 K05W01C C2005 11 22.31479 05 54 46.74 +63 30 56.9 18.5 R EW036734 K05W01C C2005 11 22.31921 05 54 47.21 +63 31 01.2 18.6 R EW036734 K05W01C 5C2005 11 22.45382 05 55 03.89 +63 33 24.0 18.0 R EW036673 K05W01C 5C2005 11 22.46308 05 55 04.91 +63 33 33.2 EW036673 K05W01C 5C2005 11 22.46852 05 55 05.54 +63 33 38.5 EW036673 K05W01C 5C2005 11 22.47245 05 55 05.98 +63 33 42.3 EW036673 Observer details: 651 Grasslands Observatory, Tucson. Observer J. E. McGaha. 0.62-m f/5.1 Newtonian reflector + CCD. 673 Table Mountain Observatory, Wrightwood. Observer J. Young. 0.6-m f/16 Cassegrain + CCD. 704 Lincoln Laboratory ETS, New Mexico. Observers M. Bezpalko, L. Manguso, D. Torres, R. Kracke, A. Milner, H. Love. Measurers J. Stuart, R. Sayer, J. Evans, J. Kommers. 1.0-m f/2.15 reflector + CCD. 734 Farpoint Observatory. Observer G. Hug. 0.7-m reflector + CCD. Orbital elements: 2005 WC1 PHA 0.031 Epoch 2005 Nov. 6.0 TT = JDT 2453680.5 MPC M 306.79968 (2000.0) P Q n 0.59785383 Peri. 254.73165 -0.89192527 -0.30996672 a 1.3955306 Node 266.32217 +0.42130618 -0.83408641 e 0.4747118 Incl. 19.26305 -0.16422674 -0.45631184 P 1.65 H 20.4 G 0.15 From 13 observations 2005 Nov. 21-22. Ephemeris: 2005 WC1 a,e,i = 1.40, 0.47, 19 q = 0.7331 Date TT R. A. (2000) Decl. Delta r Elong. Phase V 2005 11 16 05 41.98 +61 47.7 0.298 1.205 130.7 38.5 19.7 2005 11 17 05 43.82 +62 03.3 0.288 1.197 131.0 38.6 19.6 2005 11 18 05 45.72 +62 19.1 0.277 1.189 131.2 38.7 19.5 2005 11 19 05 47.68 +62 35.2 0.267 1.182 131.4 38.9 19.4 2005 11 20 05 49.71 +62 51.6 0.256 1.174 131.6 39.0 19.3 2005 11 21 05 51.83 +63 08.2 0.246 1.166 131.7 39.2 19.2 2005 11 22 05 54.04 +63 25.2 0.236 1.158 131.9 39.4 19.1 2005 11 23 05 56.38 +63 42.7 0.226 1.151 132.0 39.6 19.0 2005 11 24 05 58.86 +64 00.6 0.215 1.143 132.1 39.9 18.9 2005 11 25 06 01.51 +64 19.1 0.205 1.135 132.1 40.2 18.8 2005 11 26 06 04.37 +64 38.3 0.195 1.127 132.2 40.5 18.7 2005 11 27 06 07.48 +64 58.2 0.185 1.119 132.1 40.8 18.6 2005 11 28 06 10.90 +65 19.0 0.175 1.112 132.1 41.2 18.5 2005 11 29 06 14.69 +65 40.9 0.165 1.104 132.0 41.6 18.3 2005 11 30 06 18.94 +66 04.0 0.155 1.096 131.9 42.1 18.2 2005 12 01 06 23.78 +66 28.6 0.145 1.088 131.7 42.6 18.0 2005 12 02 06 29.37 +66 54.9 0.135 1.080 131.4 43.2 17.9 2005 12 03 06 35.93 +67 23.1 0.126 1.072 131.0 43.9 17.7 2005 12 04 06 43.75 +67 53.7 0.116 1.065 130.5 44.7 17.6 2005 12 05 06 53.27 +68 26.7 0.106 1.057 129.9 45.6 17.4 2005 12 06 07 05.13 +69 02.4 0.0963 1.049 129.2 46.7 17.2 2005 12 07 07 20.27 +69 40.4 0.0866 1.041 128.2 48.1 17.0 2005 12 08 07 40.17 +70 19.5 0.0771 1.033 126.9 49.7 16.8 2005 12 09 08 07.05 +70 55.7 0.0676 1.025 125.1 51.8 16.5 2005 12 10 08 44.21 +71 18.9 0.0583 1.018 122.8 54.5 16.3 2005 12 11 09 35.54 +71 04.4 0.0492 1.010 119.4 58.1 16.0 2005 12 12 10 42.56 +69 16.7 0.0405 1.002 114.5 63.4 15.7 2005 12 13 11 58.32 +64 09.8 0.0325 0.994 106.8 71.5 15.4 2005 12 14 13 08.38 +53 02.6 0.0257 0.987 94.3 84.2 15.4 2005 12 15 14 03.39 +33 26.9 0.0214 0.979 75.0 103.8 15.8 2005 12 16 14 43.48 +08 24.4 0.0213 0.971 52.4 126.6 17.4 Timothy B. Spahr (C) Copyright 2005 MPC M.P.E.C. 2005-W36 SNR Calculation Target Name: 2005 WC1 HMag: 20.5 Diameter: 0.25 km (a standard guess assuming an S-class optical albedo) Period: 4 (a standard guess) -------GOLDSTONE------- -------ARECIBO-------- Max Max Dat Run UTC Dat Run UTC Date RA Decl Delta Runs SNR SNR Window Runs SNR SNR Window 2005 12 9 128 71 0.060 631 41 2 1:42-20:36 0 0 0 - 2005 12 10 140 71 0.050 700 80 4 2:30-21:23 0 0 0 - 2005 12 11 157 70 0.041 700 167 7 4:00-22:00 0 0 0 - 2005 12 12 178 65 0.032 700 389 16 6:12-22:23 0 0 0 - 2005 12 13 197 54 0.025 700 947 39 8:30-22:23 0 0 0 - 2005 12 14 212 34 0.021 700 1839 76 10:35-22:11 124 14800 1530 12:11-14:00 2005 12 15 222 7 0.021 616 1705 75 12:24-21:41 142 17200 1560 12:35-14:48 2005 12 16 229 -15 0.025 412 639 35 14:05-20:53 0 0 0 - 2005 12 17 235 -28 0.033 243 174 12 15:41-19:48 0 0 0 - 2005 12 18 239 -36 0.041 112 45 4 - 0 0 0 - 2005 12 19 242 -42 0.050 0 0 0 - 0 0 0 - Arecibo SNRs have been adjusted to reflect current transmitter power of about 500 kW. However, 2005 WC1 moves so fast that it goes through Arecibo's declination window in only one day, contrary to what is shown for 00:00:00 UTC on each day above. Goldstone Track Assignments 2005 WC1 Goldstone track UT UT PST Duration DOY Date TX Window TX Window AST TX Window (hh:mm) --- ---- ------ ------ ------ ------- 349 Dec 15 1315-1530 0515-0730 0915-1130 2:15 Arecibo track 348 Dec 14 1201-1451 0401-0651 0801-1051 2:50 Uncertainties From Horizons: 2005 November 28, solution #5 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_S-sig DOP_X-sig RT_delay-sig 2005-Dec-10 00:00 *m 139.96066 71.34055 0.050452858840 838.423770 9030.72 32300.11 2.523742 2005-Dec-11 00:00 *m 156.90637 70.02419 0.041320428902 1441.09795 8570.81 30655.15 2.193273 2005-Dec-12 00:00 *m 177.04709 65.47657 0.032823254516 2608.64312 7703.29 27552.29 1.861384 2005-Dec-13 00:00 *m 196.17659 54.66082 0.025601044804 4856.56424 5921.81 21180.47 1.509142 2005-Dec-14 00:00 *m 211.10588 34.48179 0.021016811103 8098.69785 2393.90 8562.23 1.106349 2005-Dec-15 00:00 *m 221.74116 7.99462 0.020896126127 9142.83005 2446.89 8751.76 0.755140 2005-Dec-16 00:00 * 229.23752 -13.92680 0.025315024229 6908.49306 6036.49 21590.66 0.700693 2005-Dec-17 00:00 * 234.64663 -27.69824 0.032482913662 4626.75432 7846.19 28063.41 0.849101 2005-Dec-18 00:00 * 238.67710 -36.02539 0.040994644174 3186.40442 8718.51 31183.42 1.074478 - - - - - - - - - - - - - - - - - - - - - - - - - - -- From Horizons: 2005 December 6, solution #9, #obs: 50 (14 days) 2005-Dec-10 00:00 *m 140.26964 71.33398 0.050054603337 69.4748773 2990.92 10697.61 0.695027 2005-Dec-11 00:00 *m 157.36270 69.96707 0.040943560459 135.274473 2837.44 10148.66 0.586964 2005-Dec-12 00:00 *m 177.59518 65.29141 0.032478736279 271.079804 2545.77 9105.45 0.483577 2005-Dec-13 00:00 *m 196.69200 54.21812 0.025316147484 548.340417 1943.33 6950.69 0.387361 2005-Dec-14 00:00 *m 211.52228 33.68478 0.020849082271 973.312217 752.09 2689.98 0.303795 2005-Dec-15 00:00 *m 222.06257 7.09839 0.020895157107 1147.19824 856.82 3064.58 0.253665 2005-Dec-16 00:00 * 229.48753 -14.58332 0.025441967163 903.572449 2027.57 7251.99 0.264268 2005-Dec-17 00:00 * 234.84597 -28.12157 0.032673737988 632.368410 2613.90 9349.12 0.324450 2005-Dec-18 00:00 * 238.84036 -36.30543 0.041212802032 454.208263 2897.27 10362.65 0.410952 - - - - - - - - - - - - - - - - - - - - - - - - - - -- From Horizons: 2005 December 7, solution #10, #obs: 60 (15 days) 2005-Dec-10 00:00 *m 140.27494 71.33360 0.049996107867 23.1944398 1715.76 6136.73 0.377651 2005-Dec-11 00:00 *m 157.37150 69.96557 0.040894037261 47.8071916 1628.09 5823.19 0.316185 2005-Dec-12 00:00 *m 177.60680 65.28677 0.032437829741 99.9616706 1461.25 5226.44 0.258061 2005-Dec-13 00:00 *m 196.70385 54.20647 0.025283338080 208.956998 1116.20 3992.30 0.205733 2005-Dec-14 00:00 *m 211.53255 33.66234 0.020823481706 380.693843 433.28 1549.72 0.164331 2005-Dec-15 00:00 *m 222.07101 7.07142 0.020874181054 458.292856 489.48 1750.71 0.145595 2005-Dec-16 00:00 * 229.49448 -14.60448 0.025420555002 367.512395 1161.11 4152.94 0.159842 2005-Dec-17 00:00 * 234.85180 -28.13621 0.032647604573 261.286644 1497.71 5356.86 0.198905 2005-Dec-18 00:00 * 238.84537 -36.31580 0.041179642932 190.301869 1660.57 5939.36 0.250937 - - - - - - - - - - - - - - - - - - - - - - - - - - -- From Jon Giorgini: 2005 December 12: With 112 optical observations (2005-Nov-21 to 2005-Dec-11), 2005 WC1 solution #14 was computed and found to have 3-sigma S & X-band uncertainties as shown below. Date__(UT)__HR:MN POS_3sigma DOP_S-sig DOP_X-sig RT_delay-sig 2005-Dec-13 00:00 6.55801780 345.51 1235.79 0.054064 2005-Dec-14 00:00 15.4333261 136.04 486.58 0.044595 2005-Dec-15 00:00 22.4163516 147.60 527.93 0.044058 2005-Dec-16 00:00 20.8043306 354.85 1269.18 0.052771 - - - - - - - - - - - - - - - - - - - - - - - - - - -- From Jon Giorgini: 2005 December 14: With the 3 Dopplers and 1 delay from Arecibo, combined with 118 optical observations spanning 2005-Nov-21 to 2005-Dec-12, 2005 WC1 solution #22 was computed. 3-sigma X-band (and S-band) uncertainties are shown below: Date__(UT)__HR:MN POS_3sigma DOP_S-sig DOP_X-sig RT_delay-sig 2005-Dec-13 00:00 1.13341184 2.12 7.59 0.000094 2005-Dec-14 00:00 1.53456909 1.32 4.72 0.000026 2005-Dec-15 00:00 2.02094945 0.39 1.38 0.000021 2005-Dec-16 00:00 2.14474682 1.12 4.02 0.000105 Setups CW Setup Arecibo observations on December 14 revealed an S-band bandwidth of about 2.5 Hz and a visible range extent of about 150 m, so the X-band bandwidth could be close to 9 Hz and the diameter close to 300 meters. Given that the ephemeris uncertainties are now small, we'll start with the following cw setup for about ten minutes, and then we'll go to 1/8 usec imaging. Note: the round-trip time is only about 23 seconds, so we may not get two complete hops per run. TX polarization RCP RCV polarization LCP Frequencies: 2 Dwell: 10 seconds Bandwidth: 4000 Hz Sampling interval: 2500 x 0.1 usec VME FFT for PSD files: 8192 for 0.488-Hz resolution Possible ranging setups: ------------------------------------------------------ 127 x 64 10-usec single sample baud 10 usec code 127 gates 127 FFT 64 CLT 11 ncoh 2 bandwidth 394 Hz resolution 6.15 Hz TXOFF +60 Hz - echo will be centered at +9.75 bins or in bin 32+10 = 42 incoh sums 64 = 10.4 sec/record ------------------------------------------------------ 127 x 64 11-usec single sample, 5.6-Hz resolution. baud 11 usec code 127 gates 127 PRP 1397 FFT 64 CLT 11 ncoh 2 bandwidth 357.9 Hz resolution 5.59 Hz TXOFF TBD ------------------------------------------------------ 127 x 64 11-usec single sample, 11.2-Hz resolution baud 11 usec code 127 gates 127 PRP 1397 FFT 64 CLT 11 ncoh 1 bandwidth 715.8 Hz resolution 11.2 Hz TXOFF +60 - echo would be centered at +5 bins w/perfect ephemeris ------------------------------------------------------ 127 x 64 7-usec single sample ------------------------------ baud 7 usec code 127 gates 127 PRP 889 FFT 64 CLT 11 ncoh 1 bandwidth 1124.9 Hz resolution 17.6 Hz TXOFF +60 - echo would be centered at +3.4 bins w/perfect ephemeris ------------------------------------------------------ 127 x 64 1-usec single sample ------------------------------ baud 1 usec code 127 gates 127 PRP 127 FFT 64 CLT 13 & 14, about evenly divided ncoh 15 bandwidth 525 Hz resolution 8.2 Hz TXOFF +50 - echo would be centered at +6.1 bins w/perfect ephemeris ------------------------------------------------------ 0.125-usec ranging setup used in first UY4 track (DOY 213, Aug. 1) ------------------ setup JX1XS001 revised baud 0.125 usec code 127 gates 127 FFT 64 ncoh 984 bandwidth 64.016384 Hz resolution 1.000256 Hz TXOFF We used 10 Hz, placing COM in cell 32+10=42 Henceforth use 15 Hz, to put COM in 32+15=47 incoh sums 4 looks= 8 sec/record = expect records per run ~ RTT/8 PFS CLT gate 21 __________________________________________________ ___ 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 __________________________________________________ ___ Instructions NOTE: Data should be moved to the appropriate subdirectories in stealth:/export/data0/rosema/2005WC1/raw/ 2005 WC1 POINTING: OSOD and predicts are at Goldstone on stealth: /export/data2/osod/ops/2005wc1/PRDX.OUT.s22 /PUNCH.OUT.s22 /EPH.OUT.s22 and have been copied to: /export/data0/rosema/2005WC1/support/ POINTING TX Offsets Date (UTC) DOY hhmmss RA Dec Macro LHA Dec RTT OSOD 2005 12 15 349 130000 226.5569 -5.7222 A 22.8 22 2005 12 15 349 140000 226.8447 -6.6088 A 23.0 2005 12 15 349 150000 227.1241 -7.4795 A -0.0018 -0.0056 23.3 2005 12 15 349 160000 227.3964 -8.3342 A 23.4 2005 12 15 349 170000 227.6630 -9.1725 A 23.7 PRDX.OUT.s22 TRANSMITTER: STATION #14, RECEIVER: STATION #14 RECEIVER U.T. RANGE DOPPLER LHA DEC RA EL 2005 DEC 15 13:10 22.8767695535 -457631.682 298.2930 -5.8711 226.605 18.960 2005 DEC 15 13:20 22.9089476356 -460520.116 300.7515 -6.0195 226.654 20.706 2005 DEC 15 13:30 22.9413289889 -463431.435 303.2102 -6.1674 226.702 22.424 2005 DEC 15 13:40 22.9739151788 -466364.720 305.6693 -6.3150 226.750 24.111 2005 DEC 15 13:50 23.0067077111 -469318.993 308.1285 -6.4621 226.797 25.765 2005 DEC 15 14:00 23.0397080282 -472293.217 310.5880 -6.6087 226.845 27.383 2005 DEC 15 14:10 23.0729174835 -475286.296 313.0477 -6.7550 226.892 28.959 2005 DEC 15 14:20 23.1063373659 -478297.084 315.5077 -6.9008 226.939 30.492 2005 DEC 15 14:30 23.1399688679 -481324.378 317.9678 -7.0461 226.985 31.977 2005 DEC 15 14:40 23.1738131028 -484366.927 320.4282 -7.1910 227.032 33.410 2005 DEC 15 14:50 23.2078710950 -487423.433 322.8888 -7.3355 227.078 34.785 2005 DEC 15 15:00 23.2421437830 -490492.552 325.3496 -7.4795 227.124 36.099 2005 DEC 15 15:10 23.2766320028 -493572.897 327.8106 -7.6231 227.170 37.346 2005 DEC 15 15:20 23.3113364769 -496663.042 330.2718 -7.7662 227.216 38.521 2005 DEC 15 15:30 23.3462578560 -499761.524 332.7332 -7.9089 227.261 39.618 GOLDSTONE MASTERLOG ========================= RCV file setup runs start -stop osod OFFSET TX Poln ---------------------------------------------------------------------------- - December 15 (DOY 349) CW 2 hops, 4 kHz, 10s dwell 13 132514-133510 22 none RCP VME & PFS 1/8 us 127 code ncoh=1970 91 141741-153026 24 +7 Hz RCP VME & PFS ========================= RADAR ASTROMETRY 2005 12 15 13:30:00 P -463428.4D0 1.0 8560.D6 -14 -14 Benner, L.A.M. Correction of +3 Hz to soln 22 from 13 cw runs with 0.5 Hz resn. Bandwidth is about 8 Hz. ========================= PRELIMINARY IMAGING RESULTS Resolution: 0.125 usec (19 meters) x 0.25 Hz 14:17 - 14:34 UTC 14:34 - 14:47 UTC 14:47 - 15:02 UTC 15:02 - 15:15 UTC 15:15 - 15:30 UTC Dr. Lance A. M. Benner | PHONE: (818) 354-7412 Mail Stop 300-233 | FAX: (818) 354-9476 Jet Propulsion Laboratory | email: Pasadena, CA 91109-8099 | Plan: To live long and prosper http://echo.jpl.nasa.gov/asteroids/2...1_planninghtml Asteroid Radar Astronomy biking the year thru and not like years before. |
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