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
2025-04-11 02:47:14 V 10 34 29.97 +68 46 57.9 V 270
2025-04-11 02:47:14 v 1 263.84454 +33.54452 270
2025-04-11 02:54:27 V 10 34 08.73 +68 47 46.5 V 270
2025-04-11 02:54:27 v 1 263.84454 +33.54452 270
2025-04-11 06:28:49 C 10 23 40.139 +69 09 51.30 V 703
2025-04-11 06:32:19 C 10 23 29.753 +69 10 10.67 V 703
2025-04-11 06:35:48 C 10 23 19.388 +69 10 30.29 V 703
2025-04-11 06:39:17 C 10 23 09.006 +69 10 49.98 V 703
2025-04-11 20:28:14 B 09 42 04.891 +70 10 57.29 Z K35
2025-04-11 20:29:31 B 09 42 00.922 +70 11 01.57 Z K35
2025-04-11 20:30:10 B 09 41 58.807 +70 11 02.58 Z K35
2025-04-12 09:02:10 C 09 04 13.476 +70 32 37.39 V T08
2025-04-12 09:06:48 C 09 03 59.486 +70 32 38.72 V T08
2025-04-12 09:22:03 C 09 03 13.702 +70 32 41.10 V T08
2025-04-12 09:30:05 C 09 02 49.594 +70 32 41.93 V T08
2025-04-12 20:00:04 C 08 32 49.98 +70 27 22.3 V M32
2025-04-12 20:01:20 C 08 32 46.41 +70 27 20.4 V M32
2025-04-12 20:02:36 C 08 32 42.84 +70 27 18.5 V M32
2025-04-12 20:03:52 C 08 32 39.27 +70 27 16.6 V M32
2025-04-12 20:05:06 C 08 32 35.74 +70 27 14.7 V M32
2025-04-13 01:36:46 V 08 17 39.79 +70 18 03.9 V 270
2025-04-13 01:36:46 v 1 270.07433 +35.15012 270
2025-04-13 01:49:24 V 08 17 04.77 +70 17 34.8 V 270
2025-04-13 01:49:24 v 1 270.07433 +35.15012 270
2025-04-13 01:54:34 V 08 16 51.41 +70 17 24.1 V 270
2025-04-13 01:54:34 v 1 270.07433 +35.15012 270
2025-04-13 01:55:58 V 08 16 47.00 +70 17 18.8 V 270
2025-04-13 01:55:58 v 1 270.07433 +35.15012 270
2025-04-13 20:39:57 B 07 31 22.69 +69 15 08.2 X L99
2025-04-13 20:41:47 B 07 31 18.68 +69 14 59.9 X L99
2025-04-13 20:43:17 B 07 31 15.56 +69 14 54.1 X L99
2025-04-14 05:46:20 C 07 12 37.824 +68 35 01.25 V T05
2025-04-14 05:51:44 C 07 12 26.957 +68 34 34.36 V T05
2025-04-14 06:00:18 C 07 12 09.787 +68 33 51.84 V T05
2025-04-14 06:14:59 C 07 11 40.416 +68 32 38.15 V T05
2025-04-14 19:58:50 C 06 47 14.868 +67 20 48.34 Z C23
2025-04-14 20:27:06 C 06 46 28.390 +67 18 09.50 Z C23
2025-04-14 21:10:09 C 06 45 18.334 +67 14 06.29 Z C23
2025-04-16 21:10:08 C 05 47 52.08 +62 36 48.9 X D04
2025-04-16 21:22:43 C 05 47 41.28 +62 35 34.6 X D04
2025-04-16 21:35:05 C 05 47 30.54 +62 34 21.2 X D04
2025-04-16 22:38:23 C 05 46 35.91 +62 28 20.0 V M32
2025-04-16 22:41:38 C 05 46 33.16 +62 28 00.9 V M32
2025-04-16 22:44:54 C 05 46 30.40 +62 27 41.3 V M32
2025-04-16 22:48:08 C 05 46 27.66 +62 27 22.9 V M32
2025-04-16 22:51:23 C 05 46 24.91 +62 27 03.8 V M32
2025-04-17 02:50:09 C 05 43 03.126 +62 05 28.39 V 703
2025-04-17 02:53:33 C 05 43 00.332 +62 05 08.34 V 703
2025-04-17 02:56:58 C 05 42 57.517 +62 04 48.25 V 703
2025-04-17 03:00:22 C 05 42 54.536 +62 04 28.92 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)