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
2016-03-29 09:04:16 C 09 08 52.82 +12 18 36.8 L T05
2016-03-29 09:35:41 C 09 08 49.43 +12 19 21.7 L T05
2016-03-29 10:07:47 C 09 08 45.99 +12 20 06.8 L T05
2016-03-31 13:09:16 C 09 03 53.84 +13 28 34.4 q D29
2016-03-31 13:33:23 C 09 03 51.56 +13 29 04.9 q D29
2016-03-31 13:57:31 C 09 03 49.33 +13 29 35.3 q D29
2016-04-01 04:01:30 C 09 02 36.00 +13 47 08.2 q H45
2016-04-01 04:03:10 C 09 02 35.83 +13 47 10.6 q H45
2016-04-01 04:04:16 C 09 02 35.75 +13 47 11.8 q H45
2016-04-01 04:05:31 C 09 02 35.64 +13 47 13.6 q H45
2016-04-01 04:06:44 C 09 02 35.52 +13 47 15.1 q H45
2016-04-01 04:07:59 C 09 02 35.39 +13 47 16.4 q H45
2016-04-02 08:39:45 C 09 00 15.64 +14 21 23.6 L T05
2016-04-02 09:12:35 C 09 00 12.87 +14 22 00.9 L T05
2016-04-02 09:45:12 C 09 00 10.23 +14 22 38.0 L T05
2016-04-02 10:18:07 C 09 00 07.57 +14 23 14.3 L T05
2016-04-03 03:11:39 C 08 58 51.79 +14 42 18.8 q H45
2016-04-03 03:13:16 C 08 58 51.66 +14 42 21.1 q H45
2016-04-03 03:14:41 C 08 58 51.56 +14 42 22.3 q H45
2016-04-03 03:16:02 C 08 58 51.45 +14 42 23.8 q H45
2016-04-03 03:17:09 C 08 58 51.35 +14 42 25.2 q H45
2016-04-03 03:18:29 C 08 58 51.22 +14 42 26.5 q H45
2016-04-04 02:41:11 C 08 57 12.25 +15 07 47.5 q 703
2016-04-04 02:58:37 C 08 57 10.99 +15 08 06.2 q 703
2016-04-04 03:07:20 C 08 57 10.35 +15 08 15.1 q 703
2016-04-05 07:39:19 C 08 55 18.33 +15 37 31.2 L T05
2016-04-05 08:05:32 C 08 55 16.52 +15 37 56.2 L T05
2016-04-05 08:27:10 C 08 55 15.07 +15 38 18.5 L T05
2016-04-05 08:56:50 C 08 55 13.10 +15 38 47.1 L T05
2016-04-06 20:54:35 C 08 53 08.19 +16 12 55.4 q 160
2016-04-06 20:57:33 C 08 53 08.00 +16 12 58.4 q 160
2016-04-06 21:00:30 C 08 53 07.80 +16 13 01.3 q 160
2016-04-07 04:03:06 C 08 52 45.03 +16 19 27.8 q H45
2016-04-07 04:05:05 C 08 52 44.90 +16 19 29.3 q H45
2016-04-07 04:06:07 C 08 52 44.86 +16 19 30.3 q H45
2016-04-07 04:07:36 C 08 52 44.77 +16 19 31.7 q H45
2016-04-07 04:09:05 C 08 52 44.68 +16 19 32.9 q H45
2016-04-07 04:10:30 C 08 52 44.59 +16 19 34.4 q H45
2016-04-09 07:26:19 C 08 50 16.34 +17 03 30.4 L T05
2016-04-09 07:58:36 C 08 50 14.75 +17 03 55.8 L T05
2016-04-09 08:05:03 C 08 50 14.47 +17 04 00.2 L T05
2016-04-09 08:34:50 C 08 50 13.09 +17 04 24.2 L T05
2016-04-10 03:18:26 C 08 49 26.75 +17 19 10.6 q 703
2016-04-10 03:25:43 C 08 49 26.43 +17 19 16.6 q 703
2016-04-10 03:33:01 C 08 49 26.11 +17 19 22.3 q 703
2016-04-10 03:40:19 C 08 49 25.85 +17 19 27.5 q 703
2016-04-10 20:55:36 C 08 48 45.48 +17 32 33.5 q 160
2016-04-10 20:58:35 C 08 48 45.30 +17 32 35.1 q 160
2016-04-10 21:01:34 C 08 48 45.17 +17 32 37.4 q 160
2016-04-12 20:30:28 C 08 47 09.72 +18 06 28.2 q 160
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)