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
2025-04-09 11:45:40 v 1 134.35900 +35.08986 270
2025-04-09 20:46:41 V 11 50 01.07 +64 02 31.4 V 270
2025-04-09 20:46:41 v 1 358.80077 +50.93272 270
2025-04-09 20:53:14 V 11 49 46.87 +64 03 49.6 V 270
2025-04-09 20:53:14 v 1 358.80077 +50.93272 270
2025-04-09 20:59:48 V 11 49 32.49 +64 05 09.7 V 270
2025-04-09 20:59:48 v 1 358.80077 +50.93272 270
2025-04-09 21:06:21 V 11 49 18.08 +64 06 29.9 V 270
2025-04-09 21:06:21 v 1 358.80077 +50.93272 270
2025-04-09 21:53:06 B 11 47 35.460 +64 15 53.75 X Z43
2025-04-09 22:03:20 B 11 47 12.689 +64 17 55.57 X Z43
2025-04-09 22:13:35 B 11 46 49.918 +64 19 57.29 X Z43
2025-04-10 02:09:11 V 11 38 10.57 +65 05 16.7 V 270
2025-04-10 02:09:11 v 1 270.07433 +35.15011 270
2025-04-10 02:21:09 V 11 37 42.62 +65 07 32.4 V 270
2025-04-10 02:21:09 v 1 270.07433 +35.15011 270
2025-04-10 02:35:31 V 11 37 09.05 +65 10 14.3 V 270
2025-04-10 02:35:31 v 1 270.07433 +35.15011 270
2025-04-10 02:44:47 V 11 36 47.30 +65 11 59.2 V 270
2025-04-10 02:44:47 v 1 270.07433 +35.15011 270
2025-04-10 04:52:29 V 11 31 51.32 +65 35 04.7 V 270
2025-04-10 04:52:29 v 1 237.55011 +37.73288 270
2025-04-10 04:58:54 V 11 31 33.82 +65 36 21.7 V 270
2025-04-10 04:58:54 v 1 237.55011 +37.73288 270
2025-04-10 05:04:20 V 11 31 21.90 +65 37 20.2 V 270
2025-04-10 05:04:20 v 1 237.55011 +37.73288 270
2025-04-10 05:11:36 V 11 31 04.34 +65 38 38.2 V 270
2025-04-10 05:11:36 v 1 237.55011 +37.73288 270
2025-04-10 20:20:07 B 10 52 27.869 +67 59 41.53 Z K35
2025-04-10 20:20:31 B 10 52 26.762 +67 59 44.38 Z K35
2025-04-10 20:20:55 B 10 52 25.730 +67 59 47.90 Z K35
2025-04-10 20:21:18 B 10 52 24.619 +67 59 51.04 Z K35
2025-04-10 20:21:40 B 10 52 23.594 +67 59 53.92 Z K35
2025-04-10 20:22:04 B 10 52 22.440 +67 59 57.01 Z K35
2025-04-10 22:04:35 C 10 47 36.530 +68 13 07.72 Z C23
2025-04-10 22:14:52 C 10 47 07.594 +68 14 24.47 Z C23
2025-04-10 22:37:58 C 10 46 02.513 +68 17 15.54 Z C23
2025-04-10 22:39:26 C 10 45 58.354 +68 17 26.38 Z C23
2025-04-11 01:00:37 V 10 39 30.02 +68 34 34.8 V 270
2025-04-11 01:00:37 v 1 294.76461 +48.03987 270
2025-04-11 01:07:38 V 10 39 10.78 +68 35 21.4 V 270
2025-04-11 01:07:38 v 1 294.76461 +48.03987 270
2025-04-11 01:13:59 V 10 38 52.49 +68 36 06.2 V 270
2025-04-11 01:13:59 v 1 294.76461 +48.03987 270
2025-04-11 01:20:12 V 10 38 34.27 +68 36 49.4 V 270
2025-04-11 01:20:12 v 1 294.76461 +48.03987 270
2025-04-11 02:35:27 V 10 35 04.17 +68 45 39.1 V 270
2025-04-11 02:35:27 v 1 263.84454 +33.54452 270
2025-04-11 02:41:28 V 10 34 46.83 +68 46 19.8 V 270
2025-04-11 02:41:28 v 1 263.84454 +33.54452 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)