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
2004-03-20 07:43:28 C 12 17 03.55 -01 28 56.5 r H41
2004-03-20 07:45:47 C 12 17 02.88 -01 28 49.5 r H41
2004-03-20 14:17:38 C 12 15 07.89 -01 08 02.6 r 379
2004-03-20 14:19:47 C 12 15 07.14 -01 07 56.0 r 379
2004-03-20 14:21:57 C 12 15 06.54 -01 07 49.1 r 379
2004-03-20 14:26:14 C 12 15 05.20 -01 07 35.2 r 379
2004-03-21 00:46:35 C 12 11 58.65 -00 34 21.5 r 939
2004-03-21 00:48:44 C 12 11 57.98 -00 34 14.6 r 939
2004-03-21 00:50:55 C 12 11 57.30 -00 34 07.7 r 939
2004-03-21 00:52:11 C 12 11 56.84 -00 34 04.6 r 170
2004-03-21 00:55:22 C 12 11 55.86 -00 33 53.9 r 170
2004-03-21 00:57:29 C 12 11 55.21 -00 33 46.8 r 170
2004-03-21 07:43:14 C 12 09 51.48 -00 11 37.6 15.7 d H72
2004-03-21 07:44:41 C 12 09 51.14 -00 11 32.8 16.4 d H72
2004-03-21 07:46:06 C 12 09 50.71 -00 11 28.7 16.2 d H72
2004-03-21 07:47:32 C 12 09 50.18 -00 11 23.7 16.1 d H72
2004-03-21 08:11:38 C 12 09 43.71 -00 10 10.1 o 699
2004-03-21 08:30:48 C 12 09 36.62 -00 09 02.1 15.8 d H72
2004-03-21 08:32:13 C 12 09 36.26 -00 08 57.1 15.5 d H72
2004-03-21 08:33:38 C 12 09 35.74 -00 08 53.1 15.8 d H72
2004-03-21 08:35:01 C 12 09 35.33 -00 08 48.7 15.6 d H72
2004-03-21 08:48:06 C 12 09 32.29 -00 08 11.0 o 699
2004-03-21 09:08:11 C 12 09 25.42 -00 07 05.5 r H41
2004-03-21 09:11:26 C 12 09 24.41 -00 06 55.0 r H41
2004-03-21 09:13:39 C 12 09 23.74 -00 06 47.9 r H41
2004-03-21 09:15:27 C 12 09 23.16 -00 06 41.7 r H41
2004-03-21 09:24:29 C 12 09 20.88 -00 06 11.8 o 699
2004-03-21 10:00:57 C 12 09 09.46 -00 04 12.2 o 699
2004-03-21 11:06:57 C 12 08 52.30 +00 00 07.3 r D85
2004-03-21 11:10:15 C 12 08 51.27 +00 00 18.2 r D85
2004-03-21 11:12:44 C 12 08 50.51 +00 00 26.6 r D85
2004-03-21 12:17:47 C 12 08 30.24 +00 03 16.8 r 379
2004-03-21 12:19:56 C 12 08 29.49 +00 03 23.7 r 379
2004-03-21 12:22:06 C 12 08 28.81 +00 03 31.7 r 379
2004-03-21 12:24:14 C 12 08 28.20 +00 03 38.9 r 379
2004-03-21 14:02:13 C 12 07 54.99 +00 09 08.4 15.9 c 608
2004-03-21 14:17:21 C 12 07 50.26 +00 09 58.4 16.0 c 608
2004-03-21 14:33:19 C 12 07 45.27 +00 10 50.9 16.0 c 608
2004-03-22 03:09:06 C 12 03 52.74 +00 52 21.7 c J93
2004-03-22 03:12:31 C 12 03 51.25 +00 52 35.5 c J93
2004-03-22 03:15:36 C 12 03 50.32 +00 52 46.5 c J93
2004-03-22 03:22:30 C 12 03 48.52 +00 53 06.3 c J93
2004-03-22 06:24:21 C 12 02 53.34 +01 03 26.4 m 333
2004-03-22 06:53:33 C 12 02 43.29 +01 05 02.0 r H41
2004-03-22 06:56:44 C 12 02 42.24 +01 05 13.0 r H41
2004-03-22 06:59:09 C 12 02 41.47 +01 05 21.0 r H41
2004-03-22 07:00:59 C 12 02 40.87 +01 05 27.2 r H41
2004-03-22 07:22:17 C 12 02 34.75 +01 06 40.2 m 333
2004-03-22 08:20:49 C 12 02 15.78 +01 09 57.0 m 333
2004-03-22 20:23:52 C 11 58 29.77 +01 50 29.0 c J93
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)