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
2016-02-10 10:10:56 C 13 29 24.04 -28 33 14.2 R G45
2016-02-12 23:39:51 C 13 18 44.80 -27 46 16.0 o K95
2016-02-12 23:50:45 C 13 18 42.83 -27 46 08.2 o K95
2016-02-13 09:02:59 C 13 17 00.23 -27 38 39.2 R G45
2016-02-13 09:09:35 C 13 16 58.96 -27 38 33.5 R G45
2016-02-13 09:16:11 C 13 16 57.67 -27 38 27.9 R G45
2016-02-13 09:22:35 C 13 16 56.44 -27 38 22.3 R G45
2016-02-13 09:29:05 C 13 16 55.18 -27 38 16.8 R G45
2016-02-20 13:30:07 C 12 39 29.17 -24 10 30.6 L T05
2016-03-03 08:34:19 C 11 19 38.96 -13 20 04.4 o 691
2016-03-03 08:38:56 C 11 19 37.57 -13 19 51.1 o 691
2016-03-03 08:43:34 C 11 19 36.13 -13 19 37.5 o 691
2016-03-05 12:13:14 C 11 04 22.71 -10 45 52.7 L T05
2016-03-05 12:45:31 C 11 04 13.00 -10 44 14.4 L T05
2016-03-05 13:17:13 C 11 04 03.49 -10 42 37.5 L T05
2016-03-05 13:49:34 C 11 03 53.82 -10 40 58.7 L T05
2016-03-07 09:15:19 C 10 51 24.264 -08 28 05.79 L F51
2016-03-07 09:48:39 C 10 51 14.468 -08 26 23.30 L F51
2016-03-07 10:05:19 C 10 51 09.564 -08 25 32.04 L F51
2016-03-11 05:26:26 C 10 26 19.35 -03 47 17.6 q 703
2016-03-11 05:38:11 C 10 26 16.15 -03 46 42.5 q 703
2016-03-11 05:49:56 C 10 26 13.02 -03 46 07.0 q 703
2016-03-11 06:01:40 C 10 26 09.90 -03 45 32.3 q 703
2016-03-14 08:29:52 C 10 07 55.821 -00 10 33.73 L F51
2016-03-14 08:47:55 C 10 07 51.491 -00 09 43.74 L F51
2016-03-14 09:05:49 C 10 07 47.198 -00 08 53.88 L F51
2016-03-15 05:04:10 C 10 03 15.50 +00 45 38.4 q 703
2016-03-15 05:14:28 C 10 03 13.10 +00 46 06.9 q 703
2016-03-15 05:24:46 C 10 03 10.72 +00 46 34.7 q 703
2016-03-15 08:38:14 C 10 02 26.03 +00 55 14.5 q H45
2016-03-15 08:39:30 C 10 02 25.75 +00 55 18.6 q H45
2016-03-15 08:41:01 C 10 02 25.36 +00 55 22.9 q H45
2016-03-15 08:42:29 C 10 02 25.06 +00 55 26.1 q H45
2016-03-15 08:43:53 C 10 02 24.71 +00 55 30.0 q H45
2016-03-15 08:45:20 C 10 02 24.40 +00 55 33.8 q H45
2016-03-15 20:14:51 C 09 59 53.98 +01 26 03.5 q 168
2016-03-15 21:43:06 C 09 59 34.49 +01 29 56.6 q 168
2016-03-15 21:45:36 C 09 59 33.93 +01 30 02.9 q 168
2016-03-16 19:49:06 C 09 54 54.10 +02 27 22.4 t C01
2016-03-16 19:50:28 C 09 54 53.77 +02 27 26.1 t C01
2016-03-16 19:51:51 C 09 54 53.52 +02 27 28.9 t C01
2016-03-16 19:53:13 C 09 54 53.23 +02 27 32.8 t C01
2016-03-16 21:53:49 C 09 54 27.51 +02 32 40.2 t C01
2016-03-16 21:55:11 C 09 54 27.20 +02 32 44.0 t C01
2016-03-16 21:56:35 C 09 54 26.90 +02 32 47.5 t C01
2016-03-16 21:57:58 C 09 54 26.59 +02 32 51.1 t C01
2016-03-16 21:59:20 C 09 54 26.29 +02 32 54.7 t C01
2016-03-16 22:00:42 C 09 54 26.05 +02 32 57.6 t C01
2016-03-16 22:02:05 C 09 54 25.75 +02 33 01.6 t C01
2016-03-16 22:03:29 C 09 54 25.46 +02 33 05.1 t C01
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)