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
2002-03-12 05:08:18 C 08 59 01.89 +00 22 56.8 16.9 c 704
2002-03-12 05:30:07 C 08 58 58.55 +00 23 57.7 16.7 c 704
2002-03-12 05:46:53 C 08 58 56.42 +00 24 43.9 c 670
2002-03-12 05:52:32 C 08 58 55.01 +00 24 59.3 17.9 c 704
2002-03-12 08:24:06 C 08 58 32.71 +00 31 58.5 c 670
2002-03-15 02:55:58 C 08 50 00.27 +03 22 02.5 16.7 c 644
2002-03-15 03:11:09 C 08 49 58.43 +03 22 38.5 16.6 c 644
2002-03-15 03:26:17 C 08 49 56.60 +03 23 14.0 16.7 c 644
2002-03-15 03:33:12 C 08 49 55.78 +03 23 29.4 c 670
2002-03-15 05:15:06 C 08 49 43.42 +03 27 31.3 c 670
2002-03-15 08:17:12 C 08 49 21.57 +03 34 35.5 c 670
2002-04-03 11:47:04 C 08 25 50.57 +14 34 29.8 m 422
2002-04-03 11:48:50 C 08 25 50.56 +14 34 31.3 m 422
2002-04-03 11:49:43 C 08 25 50.54 +14 34 32.1 m 422
2002-04-04 19:00:01 C 08 25 39.11 +14 58 59.9 c 246
2002-04-04 19:01:50 C 08 25 39.08 +14 59 01.1 c 246
2002-04-04 19:03:31 C 08 25 39.05 +14 59 02.8 c 246
2002-04-04 19:05:11 C 08 25 39.04 +14 59 04.1 c 246
2002-04-04 19:07:01 C 08 25 39.02 +14 59 05.6 c 246
2002-04-05 03:08:38 C 08 25 37.07 +15 05 18.7 18.9 c 704
2002-04-05 03:26:02 C 08 25 36.95 +15 05 32.2 19.2 c 704
2002-04-05 03:43:25 C 08 25 36.78 +15 05 44.9 19.1 c 704
2002-04-05 04:00:48 C 08 25 36.65 +15 05 58.7 19.5 c 704
2002-04-05 04:18:12 C 08 25 36.53 +15 06 10.8 18.8 c 704
2004-01-19 15:17:37 C 14 02 11.53 -21 00 29.8 20.9 c 608
2004-01-19 15:32:49 C 14 02 11.93 -21 00 30.9 21.0 c 608
2004-01-19 15:48:03 C 14 02 12.30 -21 00 32.1 20.7 c 608
2004-02-23 13:48:11 C 13 58 48.01 -18 43 17.3 c 608
2004-02-23 14:03:31 C 13 58 47.03 -18 43 09.2 c 608
2004-02-23 14:19:35 C 13 58 45.89 -18 42 58.6 c 608
2004-02-26 09:44:58 C 13 54 05.61 -17 57 21.4 18.1 c 704
2004-02-26 10:01:53 C 13 54 04.19 -17 57 07.5 18.2 c 704
2004-02-26 10:18:49 C 13 54 02.75 -17 56 56.1 18.1 c 704
2004-03-05 01:10:32 13 34 56.45 -14 53 01.4 o 084
2004-03-07 07:22:19 C 13 27 07.34 -13 36 23.1 r H41
2004-03-10 01:11:45 13 16 00.90 -11 46 12.4 o 084
2004-03-12 00:50:23 13 06 48.98 -10 13 04.3 o 084
2004-03-12 08:23:02 C 13 05 16.09 -09 57 06.5 r H41
2004-03-12 08:26:05 C 13 05 15.43 -09 57 00.2 r H41
2004-03-12 08:27:59 C 13 05 14.97 -09 56 56.5 r H41
2004-03-12 08:29:45 C 13 05 14.67 -09 56 53.1 r H41
2004-03-13 00:57:37 13 01 45.88 -09 21 19.3 o 084
2004-03-13 14:38:30 C 12 58 47.96 -08 50 23.1 r 379
2004-03-13 14:40:38 C 12 58 47.50 -08 50 18.8 r 379
2004-03-13 14:42:48 C 12 58 46.96 -08 50 13.2 r 379
2004-03-13 14:49:14 C 12 58 45.54 -08 49 59.5 r 379
2004-03-14 00:45:41 12 56 30.90 -08 27 04.4 o 084
2004-03-14 07:03:59 C 12 55 06.02 -08 12 01.1 m 333
2004-03-14 07:23:42 C 12 55 01.34 -08 11 13.7 m 333
2004-03-14 07:43:20 C 12 54 56.68 -08 10 27.7 m 333
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)