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
2018-04-06 03:55:08 C 11 34 15.97 +29 05 58.5 u 850
2018-04-06 04:15:18 C 11 34 01.74 +29 08 19.2 u 850
2018-04-06 04:24:23 C 11 33 55.33 +29 09 21.9 u 850
2018-04-06 07:13:49 C 11 31 56.82 +29 28 56.7 U 703
2018-04-06 07:22:07 C 11 31 50.93 +29 29 53.6 U 703
2018-04-06 07:30:24 C 11 31 45.02 +29 30 50.3 U 703
2018-04-06 07:38:40 C 11 31 39.12 +29 31 47.0 U 703
2018-04-06 21:16:25 C 11 22 04.52 +31 04 05.5 U G34
2018-04-06 21:18:50 C 11 22 02.79 +31 04 21.7 U G34
2018-04-06 21:20:50 C 11 22 01.34 +31 04 35.3 U G34
2018-04-06 21:23:26 C 11 21 59.39 +31 04 52.7 U G34
2018-04-06 22:00:58 C 11 21 32.08 +31 09 11.2 q 160
2018-04-06 22:03:21 C 11 21 30.33 +31 09 26.8 q 160
2018-04-06 22:05:37 C 11 21 28.66 +31 09 42.1 q 160
2018-04-06 22:09:10 C 11 21 26.06 +31 10 05.8 q 160
2018-04-06 22:13:12 C 11 21 23.09 +31 10 32.8 q 160
2018-04-06 22:17:16 C 11 21 20.10 +31 10 59.7 q 160
2018-04-06 23:21:32 C 11 20 32.39 +31 18 08.3 q L28
2018-04-06 23:39:18 C 11 20 19.46 +31 20 05.2 q L28
2018-04-06 23:59:04 C 11 20 04.93 +31 22 14.8 q L28
2018-04-07 00:16:26 C 11 19 52.22 +31 24 08.6 q L28
2018-04-07 00:17:19 C 11 19 51.59 +31 24 14.1 q L28
2018-04-07 00:17:52 C 11 19 51.17 +31 24 18.1 q L28
2018-04-07 00:36:32 C 11 19 37.49 +31 26 19.6 q L28
2018-04-07 00:37:06 C 11 19 37.07 +31 26 23.5 q L28
2018-04-07 00:55:26 C 11 19 23.65 +31 28 23.5 q L28
2018-04-07 00:56:01 C 11 19 23.19 +31 28 27.2 q L28
2018-04-07 00:56:35 C 11 19 22.80 +31 28 30.4 q L28
2018-04-07 18:53:21 C 11 06 18.07 +33 24 15.2 o 107
2018-04-07 18:55:53 C 11 06 16.16 +33 24 31.0 o 107
2018-04-07 18:58:25 C 11 06 14.23 +33 24 47.0 o 107
2018-04-07 19:46:08 C 11 05 37.69 +33 29 53.1 q L28
2018-04-07 19:52:20 C 11 05 33.00 +33 30 32.0 q L28
2018-04-07 19:52:53 C 11 05 32.52 +33 30 35.9 q L28
2018-04-07 20:14:29 C 11 05 15.96 +33 32 41.5 q 046
2018-04-07 20:15:43 C 11 05 15.05 +33 32 49.0 q 046
2018-04-07 20:16:23 C 11 05 14.53 +33 32 53.0 q 046
2018-04-07 20:17:35 C 11 05 13.62 +33 33 00.7 q 046
2018-04-07 20:18:19 C 11 05 13.01 +33 33 05.3 q 046
2018-04-07 20:19:12 C 11 05 12.35 +33 33 11.1 q 046
2018-04-07 21:28:16 C 11 04 19.37 +33 40 30.6 q L28
2018-04-07 21:28:51 C 11 04 18.93 +33 40 34.3 q L28
2018-04-07 21:29:26 C 11 04 18.52 +33 40 37.3 q L28
2018-04-09 05:46:51 C 10 39 33.15 +36 48 21.1 U 703
2018-04-09 05:55:13 C 10 39 26.44 +36 49 05.8 U 703
2018-04-09 06:03:34 C 10 39 19.75 +36 49 50.5 U 703
2018-04-09 06:11:56 C 10 39 13.03 +36 50 35.0 U 703
2018-04-10 02:01:47 C 10 23 39.58 +38 31 37.1 u 850
2018-04-10 02:11:39 C 10 23 31.57 +38 32 24.4 u 850
2018-04-10 02:17:12 C 10 23 27.08 +38 32 51.4 u 850
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)