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
2025-04-06 20:08:59 V 13 31 17.13 +45 32 49.0 V 270
2025-04-06 20:08:59 v 1 002.34691 +47.05769 270
2025-04-06 20:15:24 V 13 31 11.62 +45 34 36.8 V 270
2025-04-06 20:15:24 v 1 002.34691 +47.05769 270
2025-04-06 20:22:09 V 13 31 05.80 +45 36 29.7 V 270
2025-04-06 20:22:09 v 1 002.34691 +47.05769 270
2025-04-06 20:32:30 C 13 30 56.004 +45 39 21.68 V G33
2025-04-06 20:35:49 C 13 30 53.104 +45 40 17.27 V G33
2025-04-06 20:39:11 C 13 30 50.195 +45 41 13.92 V G33
2025-04-06 22:22:03 B 13 29 19.034 +46 10 00.16 X K87
2025-04-06 22:22:29 B 13 29 18.634 +46 10 07.64 X K87
2025-04-06 22:22:56 B 13 29 18.240 +46 10 14.88 X K87
2025-04-07 01:28:04 C 13 26 29.198 +47 01 30.54 Z C23
2025-04-07 01:57:19 C 13 26 01.891 +47 09 34.20 Z C23
2025-04-07 01:58:47 C 13 26 00.499 +47 09 58.10 Z C23
2025-04-07 02:12:14 C 13 25 47.899 +47 13 41.02 Z C23
2025-04-07 02:18:39 V 13 25 52.68 +47 15 21.1 V 270
2025-04-07 02:18:39 v 1 272.08334 +42.83022 270
2025-04-07 02:38:20 V 13 25 34.06 +47 20 52.8 V 270
2025-04-07 02:38:20 v 1 272.08334 +42.83022 270
2025-04-07 03:01:23 V 13 25 12.40 +47 27 22.2 V 270
2025-04-07 03:01:23 v 1 272.08334 +42.83022 270
2025-04-07 03:26:47 V 13 24 47.98 +47 34 31.9 V 270
2025-04-07 03:26:47 v 1 272.08334 +42.83022 270
2025-04-07 06:04:07 C 13 22 18.642 +48 18 31.90 V 703
2025-04-07 06:07:11 C 13 22 15.604 +48 19 23.23 V 703
2025-04-07 06:10:15 C 13 22 12.533 +48 20 14.53 V 703
2025-04-07 06:13:20 C 13 22 09.484 +48 21 05.98 V 703
2025-04-07 12:20:06 V 13 16 07.21 +50 02 07.0 V 270
2025-04-07 12:20:06 v 1 134.35900 +35.08986 270
2025-04-07 12:26:55 V 13 15 59.94 +50 04 01.1 V 270
2025-04-07 12:26:55 v 1 134.35900 +35.08986 270
2025-04-07 12:33:40 V 13 15 52.76 +50 05 54.0 V 270
2025-04-07 12:33:40 v 1 134.35900 +35.08986 270
2025-04-07 12:39:37 V 13 15 46.19 +50 07 34.0 V 270
2025-04-07 12:39:37 v 1 134.35900 +35.08986 270
2025-04-07 19:28:40 V 13 08 24.24 +51 59 13.6 V 270
2025-04-07 19:28:40 v 1 004.74721 +44.31953 270
2025-04-07 19:35:41 V 13 08 16.62 +52 01 02.7 V 270
2025-04-07 19:35:41 v 1 004.74721 +44.31953 270
2025-04-07 19:42:26 V 13 08 08.33 +52 02 57.1 V 270
2025-04-07 19:42:26 v 1 004.74721 +44.31953 270
2025-04-07 19:48:16 V 13 08 01.32 +52 04 34.6 V 270
2025-04-07 19:48:16 v 1 004.74721 +44.31953 270
2025-04-07 21:26:15 C 13 06 06.082 +52 31 18.62 Z C23
2025-04-07 21:51:34 C 13 05 35.870 +52 38 13.92 Z C23
2025-04-07 21:58:32 C 13 05 27.518 +52 40 08.80 Z C23
2025-04-07 22:00:00 C 13 05 25.728 +52 40 32.74 Z C23
2025-04-08 06:41:47 C 12 54 37.674 +55 01 01.27 V 703
2025-04-08 06:45:17 C 12 54 32.936 +55 01 56.71 V 703
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)