(164400) 2005 GN59 Goldstone Radar Observations Planning
(164400) 2005 GN59 was discovered by Spacewatch on April 7, 2005. It will approach within 0.0516 AU (20 lunar distances) on October 6 when it will be a strong radar target at Goldstone. 2005 GN59 appears to have a slow rotation period of about 39 hours and a large lightcurve amplitude of about 1 magnitude (M. D. Hicks, pers. comm.), suggesting a shape with substantial elongation. The absolute magnitude of 17.3 suggests a diameter within a factor of two of 1.1 km. Goldstone observations are scheduled on October 7, 9, 11, and 12. Arecibo observations are scheduled on October 13-18. This object will brighten to about 14th magnitude in late September and early October when it will be an excellent target for photometric and spectroscopic observations. This object has been classified as a "Potentially Hazardous Asteroid" by the Minor Planet Center.
Orbital and Physical Characteristics orbit type Apollo semimajor axis 1.657 AU eccentricity 0.468 inclination 6.6° perihelion distance 0.881 AU aphelion distance 2.433 AU absolute magnitude (H) 17.3 diameter 1.1 km +- a factor of two rotation period 38.606 +- 0.005 h (M. D. Hicks, pers. comm.) pole direction unknown lightcurve amplitude 1.0 mag (M. D. Hicks, pers. comm.) spectral class Sq (M. D. Hicks, pers. comm., E. S. Howell, pers. comm.) Last update: 2008 October 09
M.P.E.C. 2005-G63 Issued 2005 Apr. 9, 09:21 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
Prepared using the Tamkin Foundation Computer Network
MPC@CFA.HARVARD.EDU
URL http://cfa-www.harvard.edu/iau/mpc.html ISSN 1523-6714
2005 GN59
Observations:
K05G59N* C2005 04 07.42335 14 45 40.87 -17 26 25.8 20.0 V EG063691
K05G59N C2005 04 07.44127 14 45 39.43 -17 26 16.6 20.2 V EG063691
K05G59N C2005 04 07.45921 14 45 38.01 -17 26 07.6 20.2 V EG063691
K05G59N 1C2005 04 07.79387 14 45 12.00 -17 23 11.2 20.1 R EG063413
K05G59N 1C2005 04 07.79573 14 45 11.88 -17 23 10.3 20.1 R EG063413
K05G59N 1C2005 04 07.79758 14 45 11.73 -17 23 08.9 20.1 R EG063413
K05G59N 1C2005 04 07.79943 14 45 11.55 -17 23 08.0 20.1 R EG063413
K05G59N C2005 04 09.33817 14 43 10.99 -17 10 02.4 20.4 V EG063691
K05G59N C2005 04 09.34616 14 43 10.34 -17 09 58.3 20.3 V EG063691
K05G59N C2005 04 09.35443 14 43 09.67 -17 09 54.3 20.3 V EG063691
Observer details:
413 Siding Spring. Observer R. H. McNaught. 1.0-m f/8 reflector + CCD.
691 Steward Observatory, Kitt Peak. Observers R. S. McMillan, J. V. Scotti.
0.9-m f/3 reflector + CCD.
Orbital elements:
2005 GN59
Epoch 2005 Mar. 31.0 TT = JDT 2453460.5 MPC
M 100.56149 (2000.0) P Q
n 0.43790622 Peri. 205.95254 +0.42286527 -0.90296824
a 1.7174416 Node 219.16005 +0.85105006 +0.42467240
e 0.4964726 Incl. 6.94672 +0.31128565 +0.06558749
P 2.25 H 17.4 G 0.15
From 10 observations 2005 Apr. 7-9.
Ephemeris:
2005 GN59 a,e,i = 1.72, 0.50, 7 q = 0.8648
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2005 04 10 14 42.30 -17 04.2 1.281 2.237 156.7 10.2 20.3
2005 04 20 14 28.18 -15 29.6 1.279 2.275 170.2 4.3 20.1
2005 04 30 14 13.79 -13 48.7 1.305 2.311 176.2 1.7 20.0
2005 05 10 14 00.74 -12 12.1 1.360 2.345 163.0 7.2 20.4
2005 05 20 13 50.26 -10 49.5 1.443 2.376 150.4 12.1 20.8
2005 05 30 13 42.97 -09 46.7 1.547 2.404 138.8 16.1 21.1
2005 06 09 13 38.94 -09 05.5 1.670 2.431 128.0 19.2 21.4
2005 06 19 13 38.01 -08 45.1 1.806 2.455 118.1 21.4 21.7
2005 06 29 13 39.79 -08 43.1 1.952 2.477 109.0 22.8 21.9
Timothy B. Spahr (C) Copyright 2005 MPC M.P.E.C. 2005-G63
Target Name: 2005 GN59
HMag: 17.3
Diameter: 1.1 km (an educated guess assuming H = 17.3 and an S-class optical albedo)
Period: 38.6 h (M. D. Hicks, pers. comm.)
Goldstone SNRs
UTC LST # max
start date window window RA, dec dist runs SNR SNR/run
-----------------------------------------------------------------------------
2008 Sep 28 20:45-11:17 13:29-04:04 310, 58 0.069 341 280 16
2008 Sep 29 20:06-11:09 12:54-04:00 305, 61 0.065 373 360 20
2008 Sep 30 19:16-10:57 12:08-03:52 298, 64 0.062 409 450 24
2008 Oct 01 18:14-10:37 11:10-03:36 288, 67 0.059 451 560 29
2008 Oct 02 16:58-10:02 09:58-03:04 276, 69 0.056 494 680 34
2008 Oct 03 15:33-08:59 08:36-02:05 260, 70 0.054 527 790 38
2008 Oct 04 14:17-07:29 07:24-00:39 242, 70 0.053 532 880 42
2008 Oct 05 13:26-05:52 06:37-23:06 225, 68 0.052 510 920 45
2008 Oct 06 12:59-04:28 06:14-21:45 212, 64 0.052 477 920 46
2008 Oct 07 12:44-03:20 06:03-20:41 202, 59 0.052 443 860 44
2008 Oct 08 12:36-02:26 05:58-19:51 195, 54 0.053 410 780 41
2008 Oct 09 12:31-01:42 05:57-19:11 190, 49 0.055 379 670 37
2008 Oct 10 12:28-01:07 05:58-18:39 186, 44 0.057 349 550 32
2008 Oct 11 12:26-00:37 06:00-18:13 183, 39 0.060 322 440 27
2008 Oct 12 12:25-00:12 06:03-17:52 180, 35 0.063 297 350 22
2008 Oct 13 12:24-23:50 06:06-17:34 178, 31 0.067 273 280 18
Goldstone SNRs assume Ptx = 200 kW.
Arecibo SNRs
UTC LST # max
start date window window RA, dec dist runs SNR SNR/run
-----------------------------------------------------------------------------
2008 Oct 12 14:22-15:46 11:21-12:45 180, 36 0.063 35 4600 830
2008 Oct 13 13:47-15:55 10:50-12:58 178, 32 0.066 51 5400 830
2008 Oct 14 13:26-15:55 10:33-13:02 177, 28 0.070 56 4800 670
2008 Oct 15 13:11-15:51 10:22-13:02 175, 25 0.075 57 3900 550
2008 Oct 16 13:00-15:44 10:15-12:59 174, 22 0.079 56 3200 440
2008 Oct 17 12:52-15:37 10:11-12:56 173, 19 0.084 52 2500 360
2008 Oct 18 12:45-15:29 10:07-12:52 172, 17 0.089 50 2000 290
2008 Oct 19 12:40-15:21 10:06-12:48 172, 15 0.095 46 1600 240
2008 Oct 20 12:36-15:12 10:06-12:43 171, 13 0.100 43 1200 200
2008 Oct 21 12:33-15:04 10:07-12:39 171, 11 0.106 39 980 160
2008 Oct 22 12:31-14:55 10:09-12:34 170, 9 0.111 36 780 140
2008 Oct 23 12:29-14:46 10:11-12:29 170, 8 0.117 32 620 120
2008 Oct 24 12:28-14:37 10:14-12:23 170, 7 0.123 24 440 97
Arecibo SNRs assume Ptx = 700 kW. Prior to October 12 2005 GN59 is too
far north for Arecibo to track.
2005 GN59 Goldstone Schedule
UT UT PST Duration Round-trip
DOY Date TX Window TX Window hh:mm time (sec) SNR/Run
--- ---- --------- --------- ------- --------- -------
281 Oct 07 1245-1430 0545-0730 Oct 07 1:45 52 44
283 Oct 09 1235-1430 0535-0730 Oct 09 1:55 54 37
285 Oct 11 1230-1450 0530-0750 Oct 11 2:20 59 27
286 Oct 12 1225-1450 0525-0750 Oct 12 2:25 62 22
Arecibo Schedule
287 Oct 13 1347-1555 0647-0855 Oct 13 2:08 66 830
288 Oct 14 1326-1555 0626-0855 Oct 14 2:29 70 670
289 Oct 15 1311-1551 0611-0851 Oct 15 2:40 75 550
290 Oct 16 1300-1544 0600-0844 Oct 16 2:44 79 440
291 Oct 17 1252-1537 0552-0837 Oct 17 2:45 84 360
292 Oct 18 1245-1529 0545-0829 Oct 18 2:44 89 290
From Horizons, 2008 August 28: JPL solution 51, #obs = 214 (1978-2008) Date__(UT)__HR:MN R.A._(J2000.0)_DEC. delta POS_3sigma DOP_S-sig DOP_X-sig RT_delay-sig 2008-Oct-07 00:00 210.64462 63.57942 0.051569605644949 14.0009911 0.85 3.05 0.001025 2008-Oct-08 00:00 200.89303 58.72806 0.052086428627738 13.5809144 0.98 3.49 0.001371 2008-Oct-09 00:00 193.84645 53.48920 0.053299093944419 12.8365812 1.09 3.90 0.001727 2008-Oct-10 00:00 188.66718 48.22494 0.055168288362141 11.8622140 1.19 4.27 0.002067 2008-Oct-11 00:00 184.76587 43.16521 0.057637153122822 10.7649844 1.28 4.59 0.002377 2008-Oct-12 00:00 181.75508 38.44069 0.060639699667081 9.63997960 1.36 4.86 0.002652 2008-Oct-13 00:00 179.38140 34.11175 0.064108248187548 8.55694992 1.42 5.09 0.002893 - - - - - - - - - - - - - - - - - - - - From Jon Giorgini, 2008 October 3: With 494 optical measurements (1978-Aug-24 to 2008-Sep-30), 164400 (2005 GN59) solution #78 was estimated. Formal 3-sigma X-band uncertainties are as shown below. Date__(UT)__HR:MN POS_3sigma DOP_X-sig RT_delay-sig 2008-Oct-07 00:00 1.97064641 1.02 0.000367 2008-Oct-08 00:00 2.10692660 0.95 0.000328 2008-Oct-09 00:00 2.19014609 0.88 0.000289 2008-Oct-10 00:00 2.21983820 0.82 0.000255 2008-Oct-11 00:00 2.20285715 0.77 0.000230 2008-Oct-12 00:00 2.15004062 0.74 0.000216 2008-Oct-13 00:00 2.07292776 0.72 0.000213 - - - - - - - - - - - - - - - - - - - - - From Jon Giorgini, 2008 October 9: For the solution #82 Marina generated (494 optical measurements 1978-Aug-24 to 2008-Sep-30, 1 delay, 2 Doppler), formal 3-sigma uncertainties are shown below. Date__(UT)__HR:MN POS_3sigma DOP_S-sig DOP_X-sig RT_delay-sig 2008-Oct-10 00:00 .505613681 0.12 0.42 0.000030 2008-Oct-11 00:00 .497684164 0.11 0.39 0.000030 2008-Oct-12 00:00 .487034186 0.10 0.37 0.000031 2008-Oct-13 00:00 .474634245 0.10 0.36 0.000032 2008-Oct-14 00:00 .461304159 0.10 0.36 0.000035 2008-Oct-15 00:00 .447673920 0.10 0.36 0.000038 2008-Oct-16 00:00 .434190690 0.10 0.37 0.000042 2008-Oct-17 00:00 .421148557 0.11 0.38 0.000047 2008-Oct-18 00:00 .408724434 0.11 0.40 0.000052 2008-Oct-19 00:00 .397011119 0.12 0.41 0.000058
CW setup for the third track:
TX polarization RCP
RCV polarization LCP & RCP
Frequency hops: 2
Dwell 20 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
PRP 1270 usec
FFT 64
CLT VME ?
PFS ?
ncoh 1
bandwidth 787.4 Hz
resolution 12.3 Hz
TXOFF +100 Hz -> echo will be centered at +8 bins or in bin 32 + 8 = 40
---------------------------------------------------------------------------
127 x 64 11-usec single sample
baud 11 usec
code 127
gates 127
PRP 1397 usec
FFT 64
CLT VME ?
PFS ?
ncoh 1
bandwidth 715.8 Hz
resolution 11.2 Hz
TXOFF +100 Hz --> echo will be centered at +9 bins or in bin 32 + 9 = 41
-------------------------------------------------------------------------
127 x 64 7-usec single sample
baud 7 usec
code 127
gates 127
PRP 889
FFT 64
CLT VME ?
PFS ?
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 4
ncoh 15
bandwidth 525 Hz
resolution 8.2 Hz
TXOFF +100 -> echo would be centered at +12.2 bins or in bin 32 + 12.2 = 44
-------------------------------------------------------------------------------
0.125-usec ranging
setup JX1XS001 revised
baud 0.125 usec
code 127
gates 127
FFT 64
ncoh 984
bandwidth 64.016384 Hz
resolution 1.000256 Hz
TXOFF +15 Hz to put echo at 32 + 15 = bin 47
PFS CLT gate ?
VME CLT gate ?
_____________________________________________________________________
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 at Goldstone on aardvark:
/export/data3/osod/ops/a164400/PRDX.OUT.s82
/PUNCH.OUT.s82
/EPH.OUT.s82
POINTING
TX Offsets
Date (UTC) DOY hhmmss RA Dec Macro LHA Dec RTT OSOD
2008 10 07 281 120000 205.5673 61.1468 A 51.7 78
2008 10 07 281 130000 205.1761 60.9514 A 51.7
2008 10 07 281 140000 204.7848 60.7557 A 5.6 -2.8 51.7
2008 10 07 281 150000 204.3931 60.5592 A 51.7
2008 10 07 281 160000 204.0013 60.3612 A 51.7
2008 10 09 283 120000 191.2728 50.7753 A 54.1 80
2008 10 09 283 130000 191.0623 50.5632 A 54.1
2008 10 09 283 140000 190.8504 50.3514 A 3.2 -3.2 54.2
2008 10 09 283 150000 190.6370 50.1394 A 51.7
2008 10 09 283 160000 190.4227 49.9267 A 51.7
2008 10 11 285 120000 183.3629 40.6989 A 59.0 82
2008 10 11 285 130000 183.2387 40.5081 A 59.1
2008 10 11 285 140000 183.1127 40.3178 A 2.1 -3.1 59.2
2008 10 11 285 150000 182.9851 40.1276 A 59.3
2008 10 11 285 160000 182.8564 39.9371 A 59.5
2008 10 12 286 120000 180.6896 36.1715 A 62.2 82
2008 10 12 286 130000 180.5909 35.9965 A 62.3
2008 10 12 286 140000 180.4905 35.8219 A 1.8 -3.1 62.5
2008 10 12 286 150000 180.3885 35.6474 A 62.6
2008 10 12 286 160000 180.2854 35.4728 A 62.8
PRDX.OUT.s78
TRANSMITTER: STATION #14, RECEIVER: STATION #14
RECEIVER U.T. RANGE DOPPLER LHA DEC RA EL
2008 OCT 07 12:40 51.6701099225 -43446.412 244.3356 61.0165 205.306 19.636
2008 OCT 07 12:50 51.6731644312 -43712.080 246.9077 60.9839 205.241 20.602
2008 OCT 07 13:00 51.6762382367 -43997.073 249.4797 60.9514 205.176 21.595
2008 OCT 07 13:10 51.6793327067 -44301.833 252.0518 60.9188 205.111 22.614
2008 OCT 07 13:20 51.6824492439 -44626.764 254.6238 60.8862 205.046 23.659
2008 OCT 07 13:30 51.6855892749 -44972.229 257.1959 60.8536 204.980 24.727
2008 OCT 07 13:40 51.6887542508 -45338.550 259.7679 60.8210 204.915 25.819
2008 OCT 07 13:50 51.6919456409 -45726.007 262.3400 60.7883 204.850 26.931
2008 OCT 07 14:00 51.6951649380 -46134.839 264.9121 60.7557 204.785 28.065
2008 OCT 07 14:10 51.6984136448 -46565.240 267.4842 60.7230 204.720 29.217
2008 OCT 07 14:20 51.7016932838 -47017.362 270.0563 60.6903 204.654 30.387
2008 OCT 07 14:30 51.7050053742 -47491.313 272.6284 60.6576 204.589 31.574
PRDX.OUT.s80
TRANSMITTER: STATION #14, RECEIVER: STATION #14
RECEIVER U.T. RANGE DOPPLER LHA DEC RA EL
2008 OCT 09 12:30 54.1007270140 -172687.903 257.9388 50.6692 191.168 19.904
2008 OCT 09 12:40 54.1128414808 -172982.540 260.4807 50.6339 191.133 21.263
2008 OCT 09 12:50 54.1249775261 -173303.737 263.0227 50.5986 191.098 22.648
2008 OCT 09 13:00 54.1371370247 -173651.750 265.5648 50.5632 191.062 24.057
2008 OCT 09 13:10 54.1493218601 -174026.784 268.1068 50.5279 191.027 25.489
2008 OCT 09 13:20 54.1615339358 -174428.990 270.6489 50.4926 190.992 26.942
2008 OCT 09 13:30 54.1737751604 -174858.465 273.1911 50.4573 190.957 28.416
2008 OCT 09 13:40 54.1860474429 -175315.251 275.7333 50.4220 190.921 29.910
2008 OCT 09 13:50 54.1983527016 -175799.335 278.2755 50.3867 190.886 31.421
2008 OCT 09 14:00 54.2106928481 -176310.651 280.8178 50.3514 190.850 32.950
2008 OCT 09 14:10 54.2230697834 -176849.078 283.3601 50.3161 190.815 34.494
2008 OCT 09 14:20 54.2354854060 -177414.439 285.9024 50.2808 190.779 36.053
2008 OCT 09 14:30 54.2479415922 -178006.506 288.4448 50.2455 190.744 37.626
PRDX.OUT.s82
TRANSMITTER: STATION #14, RECEIVER: STATION #14
RECEIVER U.T. RANGE DOPPLER LHA DEC RA EL
2008 OCT 11 12:30 59.0295170541 -281512.703 267.7768 40.6034 183.301 20.686
2008 OCT 11 12:40 59.0492600130 -281824.974 270.3044 40.5716 183.280 22.352
2008 OCT 11 12:50 59.0690259775 -282169.243 272.8320 40.5399 183.260 24.039
2008 OCT 11 13:00 59.0888171970 -282545.538 275.3596 40.5081 183.239 25.746
2008 OCT 11 13:10 59.1086359157 -282953.820 277.8874 40.4764 183.218 27.473
2008 OCT 11 13:20 59.1284843671 -283393.989 280.4151 40.4446 183.197 29.218
2008 OCT 11 13:30 59.1483647866 -283865.881 282.9430 40.4129 183.176 30.981
2008 OCT 11 13:40 59.1682793851 -284369.272 285.4708 40.3812 183.155 32.760
2008 OCT 11 13:50 59.1882303660 -284903.871 287.9987 40.3495 183.134 34.554
2008 OCT 11 14:00 59.2082199050 -285469.329 290.5267 40.3178 183.113 36.364
2008 OCT 11 14:10 59.2282501460 -286065.234 293.0547 40.2861 183.092 38.187
2008 OCT 11 14:20 59.2483232070 -286691.114 295.5827 40.2544 183.070 40.023
2008 OCT 11 14:30 59.2684411762 -287346.437 298.1108 40.2227 183.049 41.872
2008 OCT 11 14:40 59.2886060919 -288030.612 300.6390 40.1910 183.028 43.733
2008 OCT 11 14:50 59.3088199594 -288742.992 303.1671 40.1593 183.006 45.605
PRDX.OUT.s82
TRANSMITTER: STATION #14, RECEIVER: STATION #14
RECEIVER U.T. RANGE DOPPLER LHA DEC RA EL
2008 OCT 12 12:20 62.2509262196 -326097.448 268.8997 36.1131 180.657 19.208
2008 OCT 12 12:30 62.2737932668 -326381.224 271.4229 36.0839 180.640 20.962
2008 OCT 12 12:40 62.2966813892 -326698.913 273.9462 36.0547 180.624 22.737
2008 OCT 12 12:50 62.3195929694 -327050.497 276.4696 36.0256 180.607 24.530
2008 OCT 12 13:00 62.3425303808 -327435.896 278.9930 35.9965 180.591 26.342
2008 OCT 12 13:10 62.3654959891 -327854.961 281.5165 35.9673 180.574 28.172
2008 OCT 12 13:20 62.3884921413 -328307.477 284.0400 35.9382 180.558 30.017
2008 OCT 12 13:30 62.4115211731 -328793.163 286.5636 35.9091 180.541 31.878
2008 OCT 12 13:40 62.4345854091 -329311.675 289.0872 35.8800 180.524 33.754
2008 OCT 12 13:50 62.4576871250 -329862.602 291.6108 35.8510 180.507 35.644
2008 OCT 12 14:00 62.4808285768 -330445.469 294.1345 35.8219 180.490 37.547
2008 OCT 12 14:10 62.5040119904 -331059.738 296.6583 35.7928 180.474 39.462
2008 OCT 12 14:20 62.5272395411 -331704.810 299.1820 35.7637 180.457 41.389
2008 OCT 12 14:30 62.5505133707 -332380.025 301.7059 35.7347 180.440 43.327
2008 OCT 12 14:40 62.5738355618 -333084.660 304.2297 35.7056 180.423 45.276
2008 OCT 12 14:50 62.5972081497 -333817.939 306.7536 35.6765 180.406 47.235
2005 GN59 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 300-233 | FAX: (818) 354-9476
Jet Propulsion Laboratory | email: lance@reason.jpl.nasa.gov
Pasadena, CA 91109-8099 | Plan: To live long and prosper
http://echo.jpl.nasa.gov/asteroids/2005GN59/html/2005GN59_planning.html
Asteroid Radar Astronomy