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
2025-04-08 06:48:46 C 12 54 28.192 +55 02 52.26 V 703
2025-04-08 06:52:15 C 12 54 23.450 +55 03 47.66 V 703
2025-04-08 09:56:20 C 12 50 16.438 +55 52 30.79 V T08
2025-04-08 10:46:02 C 12 49 05.393 +56 05 26.95 V T08
2025-04-08 10:50:41 C 12 48 58.723 +56 06 39.13 V T08
2025-04-08 11:32:32 C 12 47 58.327 +56 17 27.10 V T08
2025-04-08 16:18:41 B 12 41 20.585 +57 30 19.04 Z M69
2025-04-08 16:20:30 B 12 41 17.830 +57 30 47.16 Z M69
2025-04-08 16:22:30 B 12 41 14.784 +57 31 18.41 Z M69
2025-04-08 20:15:24 B 12 35 14.976 +58 29 18.56 Z K35
2025-04-08 20:15:50 B 12 35 14.270 +58 29 25.37 Z K35
2025-04-08 20:16:11 B 12 35 13.685 +58 29 30.66 Z K35
2025-04-08 20:48:41 B 12 34 21.221 +58 37 34.46 V L65
2025-04-08 20:50:06 B 12 34 18.953 +58 37 55.56 V L65
2025-04-08 20:51:30 B 12 34 16.663 +58 38 16.76 V L65
2025-04-09 02:20:09 V 12 25 23.69 +59 58 26.5 V 270
2025-04-09 02:20:09 v 1 263.84454 +33.54452 270
2025-04-09 02:26:38 V 12 25 12.46 +60 00 02.5 V 270
2025-04-09 02:26:38 v 1 263.84454 +33.54452 270
2025-04-09 02:33:20 V 12 25 00.86 +60 01 39.2 V 270
2025-04-09 02:33:20 v 1 263.84454 +33.54452 270
2025-04-09 02:39:49 V 12 24 49.38 +60 03 12.8 V 270
2025-04-09 02:39:49 v 1 263.84454 +33.54452 270
2025-04-09 04:03:41 V 12 22 22.47 +60 23 27.8 V 270
2025-04-09 04:03:41 v 1 261.56119 +29.57992 270
2025-04-09 04:09:15 V 12 22 11.78 +60 24 48.8 V 270
2025-04-09 04:09:15 v 1 261.56119 +29.57992 270
2025-04-09 04:15:32 V 12 22 00.62 +60 26 20.0 V 270
2025-04-09 04:15:32 v 1 261.56119 +29.57992 270
2025-04-09 04:22:58 V 12 21 47.59 +60 27 59.0 V 270
2025-04-09 04:22:58 v 1 261.56119 +29.57992 270
2025-04-09 06:07:49 C 12 18 39.690 +60 52 31.66 V 703
2025-04-09 06:11:15 C 12 18 33.379 +60 53 19.64 V 703
2025-04-09 06:14:40 C 12 18 27.083 +60 54 07.31 V 703
2025-04-09 06:18:06 C 12 18 20.754 +60 54 55.22 V 703
2025-04-09 07:40:11 V 12 15 42.73 +61 13 12.7 V 270
2025-04-09 07:40:11 v 1 283.96722 +36.87369 270
2025-04-09 07:53:22 V 12 15 18.40 +61 16 09.4 V 270
2025-04-09 07:53:22 v 1 283.96722 +36.87369 270
2025-04-09 08:21:37 V 12 14 25.74 +61 22 29.2 V 270
2025-04-09 08:21:37 v 1 283.96722 +36.87369 270
2025-04-09 08:34:47 V 12 14 01.19 +61 25 24.4 V 270
2025-04-09 08:34:47 v 1 283.96722 +36.87369 270
2025-04-09 11:26:36 V 12 08 57.93 +62 04 29.5 V 270
2025-04-09 11:26:36 v 1 134.35900 +35.08986 270
2025-04-09 11:36:28 V 12 08 38.78 +62 06 44.4 V 270
2025-04-09 11:36:28 v 1 134.35900 +35.08986 270
2025-04-09 11:42:10 V 12 08 27.50 +62 07 58.7 V 270
2025-04-09 11:42:10 v 1 134.35900 +35.08986 270
2025-04-09 11:45:40 V 12 08 20.58 +62 08 48.1 V 270
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)