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
2011-04-09 02:56:10 C 10 09 58.17 +26 32 02.9 16.4 c 704
2011-04-09 03:12:57 C 10 09 50.67 +26 32 56.1 16.3 c 704
2011-04-09 03:30:05 C 10 09 43.01 +26 33 49.6 16.3 c 704
2011-04-09 03:47:01 C 10 09 35.46 +26 34 43.0 16.1 c 704
2011-04-09 20:59:13 C 10 02 09.82 +27 26 41.4 c A24
2011-04-09 21:16:08 C 10 02 02.39 +27 27 30.9 c A24
2011-04-09 21:22:01 C 10 01 59.83 +27 27 47.7 c A24
2011-04-09 21:26:27 C 10 01 57.87 +27 28 01.0 c A24
2011-04-09 21:40:26 C 10 01 51.77 +27 28 41.7 c A24
2011-04-09 21:50:43 C 10 01 47.27 +27 29 11.8 c A24
2011-04-10 04:20:59 C 09 59 00.92 +27 48 11.3 u H45
2011-04-10 04:21:41 C 09 59 00.63 +27 48 13.2 u H45
2011-04-10 04:23:01 C 09 59 00.04 +27 48 16.9 u H45
2011-04-10 04:24:34 C 09 58 59.37 +27 48 21.6 u H45
2011-04-10 04:26:36 C 09 58 58.48 +27 48 27.2 u H45
2011-04-10 22:03:25 C 09 51 34.06 +28 37 28.1 w J51
2011-04-10 22:15:42 C 09 51 28.77 +28 38 00.9 w J51
2011-04-10 22:28:16 C 09 51 23.38 +28 38 34.6 w J51
2011-04-11 02:58:15 C 09 49 31.33 +28 50 30.1 t H47
2011-04-11 03:01:45 C 09 49 29.83 +28 50 39.0 t H47
2011-04-11 03:05:14 C 09 49 28.35 +28 50 48.4 t H47
2011-04-11 19:49:38 C 09 42 36.23 +29 33 29.3 u J28
2011-04-11 19:55:06 C 09 42 33.94 +29 33 42.8 u J28
2011-04-11 20:00:24 C 09 42 31.70 +29 33 56.2 u J28
2012-05-08 06:10:34 C 07 43 22.315 +17 33 28.06 L F51
2012-05-08 06:17:14 C 07 43 23.117 +17 33 27.74 L F51
2012-05-08 06:23:55 C 07 43 23.929 +17 33 27.57 L F51
2012-05-08 06:30:37 C 07 43 24.750 +17 33 27.49 L F51
2013-02-14 11:50:26 C 15 43 34.24 -18 42 42.4 r 703
2013-02-14 12:00:17 C 15 43 35.50 -18 42 42.3 r 703
2013-02-14 12:10:16 C 15 43 36.69 -18 42 41.7 r 703
2013-02-14 12:20:05 C 15 43 37.88 -18 42 40.3 r 703
2014-02-20 00:57:31 C 03 14 27.10 -25 26 56.8 u 807
2014-02-20 01:00:21 C 03 14 28.97 -25 26 41.9 u 807
2014-02-20 01:03:14 C 03 14 30.82 -25 26 27.5 u 807
2014-02-20 01:06:05 C 03 14 32.71 -25 26 12.7 u 807
2014-02-20 01:08:55 C 03 14 34.57 -25 25 57.9 u 807
2014-02-23 00:17:15 C 03 57 44.48 -19 13 44.8 u 807
2014-02-23 00:20:26 C 03 57 46.19 -19 13 28.2 u 807
2014-02-23 00:24:02 C 03 57 48.15 -19 13 08.9 u 807
2014-02-28 18:24:01 S 05 00 03.228 -08 15 26.35 L C51
2014-02-28 21:33:48 S 05 01 11.926 -08 02 23.78 L C51
2014-02-28 23:08:36 S 05 01 46.018 -07 55 54.73 L C51
2014-03-01 00:43:35 S 05 02 20.014 -07 49 27.16 L C51
2014-03-01 02:18:23 S 05 02 53.760 -07 43 01.42 L C51
2014-03-01 03:53:11 S 05 03 27.350 -07 36 37.15 L C51
2014-03-01 05:28:10 S 05 04 00.878 -07 30 13.97 L C51
2014-03-01 08:37:57 S 05 05 07.378 -07 17 32.75 L C51
2014-03-01 11:47:33 S 05 06 13.181 -07 04 57.58 L C51
2014-03-06 18:44:35 C 05 43 07.96 +00 01 08.2 t 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)