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
2016-03-16 22:04:51 C 09 54 25.14 +02 33 07.9 t C01
2016-03-16 22:06:15 C 09 54 24.87 +02 33 12.4 t C01
2016-03-16 22:10:22 C 09 54 23.97 +02 33 22.0 t C01
2016-03-16 22:11:46 C 09 54 23.68 +02 33 26.3 t C01
2016-03-16 22:13:07 C 09 54 23.40 +02 33 29.8 t C01
2016-03-16 22:30:41 C 09 54 19.65 +02 34 14.9 t C01
2016-03-16 22:32:03 C 09 54 19.34 +02 34 17.4 t C01
2016-03-16 22:33:27 C 09 54 19.06 +02 34 21.2 t C01
2016-03-16 22:34:49 C 09 54 18.76 +02 34 25.2 t C01
2016-03-16 22:36:12 C 09 54 18.48 +02 34 28.2 t C01
2016-03-16 22:37:34 C 09 54 18.15 +02 34 32.8 t C01
2016-03-16 22:38:58 C 09 54 17.89 +02 34 35.8 t C01
2016-03-16 22:40:20 C 09 54 17.60 +02 34 39.2 t C01
2016-03-16 22:41:43 C 09 54 17.29 +02 34 41.9 t C01
2016-03-16 23:18:49 C 09 54 09.39 +02 36 17.4 q 046
2016-03-16 23:20:18 C 09 54 09.09 +02 36 21.4 q 046
2016-03-16 23:27:06 C 09 54 07.63 +02 36 38.6 q 046
2016-03-16 23:28:24 C 09 54 07.39 +02 36 41.7 q 046
2016-03-16 23:29:51 C 09 54 07.04 +02 36 45.3 q 046
2016-03-16 23:31:24 C 09 54 06.72 +02 36 49.4 q 046
2016-03-16 23:32:43 C 09 54 06.45 +02 36 53.3 q 046
2016-03-17 07:50:26 C 09 52 23.84 +02 57 53.7 q H45
2016-03-17 07:52:16 C 09 52 23.46 +02 57 58.3 q H45
2016-03-17 07:53:17 C 09 52 23.25 +02 58 00.6 q H45
2016-03-17 07:54:14 C 09 52 23.06 +02 58 03.5 q H45
2016-03-17 07:55:12 C 09 52 22.85 +02 58 05.7 q H45
2016-03-17 07:56:21 C 09 52 22.62 +02 58 08.6 q H45
2016-03-18 07:06:16 C 09 47 46.38 +03 55 07.4 q H45
2016-03-18 07:08:25 C 09 47 45.90 +03 55 14.2 q H45
2016-03-18 07:11:11 C 09 47 45.43 +03 55 19.0 q H45
2016-03-18 19:53:08 C 09 45 20.79 +04 25 35.3 16.0 t K63
2016-03-18 20:08:02 C 09 45 17.94 +04 26 10.7 16.1 t K63
2016-03-18 20:18:34 C 09 45 15.92 +04 26 35.4 16.5 t K63
2016-03-18 21:56:37 C 09 44 56.77 +04 30 27.2 q 160
2016-03-18 22:00:29 C 09 44 56.00 +04 30 35.1 q 160
2016-03-18 22:04:19 C 09 44 55.27 +04 30 44.9 q 160
2016-03-26 21:51:11 C 09 15 30.01 +10 48 44.9 q 160
2016-03-26 21:53:28 C 09 15 29.72 +10 48 48.7 q 160
2016-03-26 21:55:45 C 09 15 29.46 +10 48 52.2 q 160
2016-03-28 05:16:41 C 09 11 51.67 +11 37 50.8 q 703
2016-03-28 05:29:26 C 09 11 50.20 +11 38 10.0 q 703
2016-03-28 05:38:51 C 09 11 49.09 +11 38 24.4 q 703
2016-03-28 05:48:16 C 09 11 48.01 +11 38 38.5 q 703
2016-03-29 04:08:15 C 09 09 23.90 +12 11 28.9 q H45
2016-03-29 04:09:50 C 09 09 23.72 +12 11 31.3 q H45
2016-03-29 04:10:58 C 09 09 23.59 +12 11 32.8 q H45
2016-03-29 04:12:19 C 09 09 23.46 +12 11 34.7 q H45
2016-03-29 04:13:49 C 09 09 23.30 +12 11 36.7 q H45
2016-03-29 04:14:57 C 09 09 23.16 +12 11 38.7 q H45
2016-03-29 08:32:53 C 09 08 56.26 +12 17 53.2 L T05
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)