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
2004-03-30 20:09:01 C 10 54 10.60 +12 53 11.4 r A16
2004-03-30 20:18:40 C 10 54 07.24 +12 53 42.4 r A16
2004-03-30 20:29:04 C 10 54 03.65 +12 54 17.4 r A16
2004-03-30 20:39:06 C 10 54 00.18 +12 54 50.1 r A16
2004-03-30 20:48:44 C 10 53 56.82 +12 55 21.9 r A16
2004-03-31 00:57:46 10 52 30.54 +13 08 47.0 o 084
2004-03-31 20:24:18 C 10 45 58.07 +14 11 36.6 r A16
2004-03-31 20:31:02 C 10 45 55.72 +14 11 59.3 r A16
2004-03-31 20:38:04 C 10 45 53.35 +14 12 21.2 r A16
2004-03-31 20:45:06 C 10 45 51.01 +14 12 44.0 r A16
2004-03-31 20:51:11 C 10 45 48.80 +14 13 02.3 r A16
2004-03-31 21:28:18 C 10 45 36.07 +14 15 00.2 c 560
2004-03-31 21:28:49 C 10 45 35.89 +14 15 03.3 c 560
2004-03-31 21:29:20 C 10 45 35.67 +14 15 05.5 c 560
2004-03-31 21:29:52 C 10 45 35.45 +14 15 06.8 c 560
2004-03-31 21:34:39 C 10 45 33.90 +14 15 23.4 c 560
2004-03-31 21:35:10 C 10 45 33.62 +14 15 23.3 c 560
2004-03-31 21:36:12 C 10 45 33.28 +14 15 25.8 c 560
2004-03-31 21:36:44 C 10 45 33.09 +14 15 28.6 c 560
2004-04-01 20:57:21 C 10 37 44.43 +15 28 07.1 o 084
2004-04-02 20:59:38 C 10 29 49.04 +16 40 07.3 o 084
2004-04-03 20:46:05 C 10 22 07.38 +17 48 12.2 o 084
2004-04-04 21:08:52 C 10 14 23.79 +18 54 37.8 o 084
2004-04-05 20:37:37 C 10 07 08.37 +19 55 14.8 o 084
2004-04-06 20:54:09 C 09 59 49.82 +20 54 27.0 o 084
2004-04-07 21:07:11 C 09 52 45.54 +21 50 09.7 c 560
2004-04-07 21:07:26 C 09 52 45.46 +21 50 10.6 c 560
2004-04-07 21:08:50 C 09 52 45.03 +21 50 13.3 c 560
2004-04-07 21:12:08 C 09 52 44.05 +21 50 20.7 c 560
2004-04-07 22:01:55 C 09 52 29.40 +21 52 11.1 c A48
2004-04-07 22:05:53 C 09 52 28.22 +21 52 19.3 c A48
2004-04-07 22:09:52 C 09 52 27.01 +21 52 28.4 c A48
2004-04-07 22:13:53 C 09 52 25.88 +21 52 37.9 c A48
2004-04-07 22:40:40 C 09 52 18.08 +21 53 26.1 o 084
2004-04-08 20:35:41 C 09 46 07.55 +22 40 48.1 r J87
2004-04-08 20:37:48 C 09 46 06.96 +22 40 52.8 r J87
2004-04-08 20:39:54 C 09 46 06.37 +22 40 56.8 r J87
2004-04-09 03:45:29 C 09 44 07.91 +22 55 37.7 r H41
2004-04-09 03:52:24 C 09 44 05.87 +22 55 54.3 r H41
2004-04-09 03:54:43 C 09 44 05.19 +22 55 59.4 r H41
2004-04-09 03:56:57 C 09 44 04.61 +22 56 02.6 r H41
2004-04-09 05:53:22 C 09 43 33.87 +23 00 10.8 17.7 c 608
2004-04-09 06:08:49 C 09 43 29.46 +23 00 42.5 17.5 c 608
2004-04-09 06:24:19 C 09 43 25.05 +23 01 13.9 17.5 c 608
2004-04-09 19:40:22 C 09 39 48.33 +23 27 24.7 r 240
2004-04-09 19:41:42 C 09 39 47.97 +23 27 27.4 r 240
2004-04-09 19:44:22 C 09 39 47.22 +23 27 32.7 r 240
2004-04-09 19:45:02 C 09 39 47.05 +23 27 33.9 r 240
2004-04-09 19:47:02 C 09 39 46.49 +23 27 37.9 r 240
2004-04-09 19:48:22 C 09 39 46.12 +23 27 40.5 r 240
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)