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
2011-04-02 22:53:08 C 11 15 46.63 +17 07 28.8 o 046
2011-04-02 22:54:06 C 11 15 46.20 +17 07 33.1 o 046
2011-04-02 22:56:00 C 11 15 45.34 +17 07 41.4 o 046
2011-04-02 22:56:24 C 11 15 45.32 +17 07 45.6 c A24
2011-04-02 22:57:55 C 11 15 44.48 +17 07 49.6 o 046
2011-04-02 23:01:23 C 11 15 43.09 +17 08 07.4 c A24
2011-04-02 23:01:24 C 11 15 42.91 +17 08 03.8 u 557
2011-04-02 23:20:36 C 11 15 34.44 +17 09 30.8 c A24
2011-04-02 23:25:35 C 11 15 32.19 +17 09 52.5 c A24
2011-04-02 23:39:49 C 11 15 25.80 +17 10 54.1 c A24
2011-04-02 23:59:37 C 11 15 16.77 +17 12 16.3 u 557
2011-04-03 00:53:50 C 11 14 52.47 +17 16 10.7 u 557
2011-04-03 01:48:24 C 11 14 28.16 +17 20 05.6 u 557
2011-04-05 22:30:31 C 10 43 48.96 +22 03 48.0 c A24
2011-04-05 22:47:51 C 10 43 41.01 +22 04 54.6 c A24
2011-04-05 22:58:23 C 10 43 36.17 +22 05 35.1 c A24
2011-04-05 23:12:40 C 10 43 29.60 +22 06 30.0 c A24
2011-04-05 23:23:13 C 10 43 24.78 +22 07 10.4 c A24
2011-04-05 23:40:32 C 10 43 16.86 +22 08 16.7 c A24
2011-04-06 21:37:11 C 10 33 28.85 +23 30 44.7 w J69
2011-04-06 21:39:43 C 10 33 27.71 +23 30 53.9 w J69
2011-04-06 21:42:14 C 10 33 26.55 +23 31 03.3 w J69
2011-04-06 21:44:47 C 10 33 25.41 +23 31 12.3 w J69
2011-04-06 21:47:18 C 10 33 24.24 +23 31 21.3 w J69
2011-04-06 21:48:04 C 10 33 23.37 +23 31 27.9 r 130
2011-04-06 21:50:13 C 10 33 22.41 +23 31 35.6 r 130
2011-04-06 21:53:08 C 10 33 21.09 +23 31 46.1 r 130
2011-04-06 21:55:17 C 10 33 20.12 +23 31 54.0 r 130
2011-04-07 21:13:40 C 10 22 57.34 +24 54 15.8 r 168
2011-04-07 21:17:20 C 10 22 55.70 +24 54 28.1 r 168
2011-04-07 23:47:43 C 10 21 49.60 +25 03 08.5 u J93
2011-04-07 23:59:15 C 10 21 44.39 +25 03 47.4 u J93
2011-04-08 00:05:23 C 10 21 41.57 +25 04 08.3 u J93
2011-04-08 04:02:59 C 10 19 58.65 +25 17 49.9 r 703
2011-04-08 04:11:10 C 10 19 54.87 +25 18 16.0 r 703
2011-04-08 04:15:25 C 10 19 52.82 +25 18 31.0 16.1 c 704
2011-04-08 04:19:22 C 10 19 51.24 +25 18 44.4 r 703
2011-04-08 04:27:34 C 10 19 47.53 +25 19 12.0 r 703
2011-04-08 04:32:08 C 10 19 45.23 +25 19 26.9 16.1 c 704
2011-04-08 04:48:54 C 10 19 37.62 +25 20 23.0 16.1 c 704
2011-04-08 05:05:37 C 10 19 30.05 +25 21 18.6 16.2 c 704
2011-04-08 05:22:27 C 10 19 22.41 +25 22 14.6 16.2 c 704
2011-04-08 21:23:53 C 10 12 21.77 +26 14 20.9 u J93
2011-04-08 21:27:58 C 10 12 19.93 +26 14 33.6 u J93
2011-04-08 21:32:04 C 10 12 18.10 +26 14 46.6 u J93
2011-04-08 22:48:40 C 10 11 43.44 +26 18 52.8 c A24
2011-04-08 23:27:23 C 10 11 26.54 +26 20 57.1 w J52
2011-04-08 23:32:21 C 10 11 24.34 +26 21 12.8 w J52
2011-04-08 23:39:54 C 10 11 20.99 +26 21 36.8 w J52
2011-04-09 02:38:25 C 10 10 06.07 +26 31 07.0 16.2 c 704
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)