85953 (1999 FK21)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.7030446163 ± 2.00e+00
Semi-major axis (a)0.7388810751 AU ± 3.00e+00
Inclination (i)12.59565879° ± 4.00e+00
Long. of Asc. Node (Ω)180.43171176° ± 5.00e+00
Arg. of Perihelion (ω)172.42809574° ± 6.00e+00
Mean Anomaly (M)258.98007896° ± 1.28e-05
Mean Motion (n)1.5518525758°/day ± 9.45e+00
Perihelion dist (q)0.21941471 AU ± 1.73e+00
Aphelion dist (Q)1.25834744 AU ± 5.32e+00
Orbital Period0.63512881 yr ± 3.87e+00
NGA Modelr2
A2-1.48932034e-06 AU/d²
Physical Parameters
H (abs. magnitude)18.09
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-04-26
RMS Residual0.174″
Uncertainty0
Orbit TypeAten
MOID0.070855 AU
Observations Used1870
Gaia Obs Used16
Oppositions26
Arc Total1971-2017
First Observation Used1971-03-26
Last Observation Used2025-04-18
Observations (2162)
Date Type RA Dec Mag Band Observatory
2004-03-28 20:55:26 C 11 10 17.53 +10 14 09.2 r A16
2004-03-28 20:56:03 C 11 10 17.45 +10 14 08.0 c 127
2004-03-28 21:02:34 C 11 10 15.15 +10 14 30.5 c 127
2004-03-28 23:29:00 11 09 23.60 +10 22 48.4 o 084
2004-03-29 11:42:11 C 11 05 14.78 +11 04 47.7 r 379
2004-03-29 11:46:28 C 11 05 13.21 +11 05 01.9 r 379
2004-03-29 11:50:47 C 11 05 11.72 +11 05 16.4 r 379
2004-03-29 11:52:55 C 11 05 11.00 +11 05 24.2 r 379
2004-03-29 19:51:53 C 11 02 27.34 +11 32 17.8 r A16
2004-03-29 19:55:45 C 11 02 26.00 +11 32 30.5 o 151
2004-03-29 19:57:55 C 11 02 25.24 +11 32 39.9 r A16
2004-03-29 19:58:35 C 11 02 24.87 +11 32 41.5 o 151
2004-03-29 20:02:22 C 11 02 23.78 +11 32 53.9 c A48
2004-03-29 20:04:26 C 11 02 22.93 +11 33 00.9 r A16
2004-03-29 20:05:32 C 11 02 22.64 +11 33 04.6 c A48
2004-03-29 20:08:19 C 11 02 21.66 +11 33 14.0 c A48
2004-03-29 20:11:22 C 11 02 20.60 +11 33 24.3 c A48
2004-03-29 20:13:06 C 11 02 19.87 +11 33 29.5 r A16
2004-03-29 20:14:43 C 11 02 19.43 +11 33 35.9 c A48
2004-03-29 20:15:21 C 11 02 19.17 +11 33 36.8 o 151
2004-03-29 20:16:21 C 11 02 18.81 +11 33 40.5 o 151
2004-03-29 20:17:21 C 11 02 18.46 +11 33 43.4 o 151
2004-03-29 20:17:37 C 11 02 18.42 +11 33 45.5 c A48
2004-03-29 20:20:25 C 11 02 17.39 +11 33 55.3 c A48
2004-03-29 20:22:50 C 11 02 16.57 +11 34 02.6 r A16
2004-03-29 20:23:30 C 11 02 16.36 +11 34 05.6 c A48
2004-03-29 20:26:37 C 11 02 15.29 +11 34 15.8 c A48
2004-03-29 20:29:30 C 11 02 14.26 +11 34 25.9 c A48
2004-03-29 20:43:10 C 11 02 09.47 +11 35 12.1 c 560
2004-03-29 20:44:12 C 11 02 09.04 +11 35 15.8 c 560
2004-03-29 20:45:12 C 11 02 08.72 +11 35 19.1 c 560
2004-03-29 20:46:14 C 11 02 08.38 +11 35 22.2 c 560
2004-03-29 20:48:44 C 11 02 07.50 +11 35 30.9 c 560
2004-03-29 20:49:14 C 11 02 07.32 +11 35 32.6 c 560
2004-03-29 20:49:45 C 11 02 07.15 +11 35 34.3 c 560
2004-03-29 20:50:16 C 11 02 06.97 +11 35 36.1 c 560
2004-03-29 20:50:47 C 11 02 06.78 +11 35 37.8 c 560
2004-03-29 21:35:19 C 11 01 51.20 +11 38 07.4 r A30
2004-03-29 21:37:28 C 11 01 50.50 +11 38 14.5 r A30
2004-03-29 21:39:05 C 11 01 49.94 +11 38 19.8 r A30
2004-03-29 21:40:46 C 11 01 49.36 +11 38 25.8 r A30
2004-03-29 21:49:33 C 11 01 46.32 +11 38 54.9 r A30
2004-03-29 23:23:45 11 01 13.12 +11 44 03.7 o 084
2004-03-30 05:20:18 C 10 59 11.98 +12 04 14.1 r H41
2004-03-30 05:23:03 C 10 59 11.01 +12 04 23.4 r H41
2004-03-30 05:24:50 C 10 59 10.41 +12 04 29.2 r H41
2004-03-30 05:26:51 C 10 59 09.69 +12 04 35.9 r H41
2004-03-30 19:37:32 C 10 54 21.55 +12 51 25.0 c 127
2004-03-30 19:41:52 C 10 54 20.05 +12 51 39.0 c 127
2004-03-30 19:59:13 C 10 54 14.04 +12 52 35.5 c 127
Radar Observations (3)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2025-04-04 05:20:00 91879923.36 2 us 8560 -14 -14
2025-04-07 07:40:00 136680.959 0.4 Hz 8560 -14 -14
2025-04-07 08:10:00 81139927.01 2 us 8560 -14 -14
Station codes
-14 DSS-14 Goldstone (70-m)