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
2018-03-20 09:42:32 C 14 04 41.96 -06 44 57.5 U 703
2018-03-20 09:50:08 C 14 04 40.70 -06 44 37.0 U 703
2018-03-20 09:57:44 C 14 04 39.42 -06 44 16.8 U 703
2018-03-20 10:05:20 C 14 04 38.16 -06 43 55.8 U 703
2018-03-25 00:34:09 C 13 42 53.71 -00 35 37.4 Q 160
2018-03-25 00:36:11 C 13 42 53.20 -00 35 29.4 Q 160
2018-03-25 00:38:13 C 13 42 52.69 -00 35 21.3 Q 160
2018-03-25 01:46:50 C 13 42 37.86 -00 29 53.2 r Y00
2018-03-25 01:50:47 C 13 42 36.83 -00 29 37.0 r Y00
2018-03-25 01:54:08 C 13 42 35.98 -00 29 23.4 r Y00
2018-03-26 01:46:01 C 13 36 27.31 +01 10 57.3 t 160
2018-03-26 01:48:01 C 13 36 26.75 +01 11 06.2 t 160
2018-03-26 01:50:01 C 13 36 26.19 +01 11 15.0 t 160
2018-03-27 01:43:16 C 13 29 46.39 +03 02 15.8 r Y00
2018-03-27 01:44:52 C 13 29 45.90 +03 02 23.0 r Y00
2018-03-27 01:46:18 C 13 29 45.44 +03 02 30.6 r Y00
2018-03-27 09:27:00 C 13 27 25.25 +03 39 05.8 U 703
2018-03-27 09:34:52 C 13 27 22.76 +03 39 44.6 U 703
2018-03-27 09:42:46 C 13 27 20.27 +03 40 23.4 U 703
2018-03-27 09:50:38 C 13 27 17.75 +03 41 01.9 U 703
2018-03-28 23:12:35 C 13 15 06.86 +06 56 51.1 U Z80
2018-03-28 23:14:19 C 13 15 06.26 +06 57 00.3 U Z80
2018-03-28 23:16:04 C 13 15 05.63 +06 57 09.8 U Z80
2018-03-28 23:17:49 C 13 15 05.01 +06 57 19.5 U Z80
2018-03-28 23:19:33 C 13 15 04.40 +06 57 29.9 U Z80
2018-03-28 23:21:19 C 13 15 03.74 +06 57 39.2 U Z80
2018-03-28 23:23:02 C 13 15 03.14 +06 57 49.2 U Z80
2018-03-28 23:25:39 C 13 15 02.12 +06 58 03.6 U Z80
2018-03-28 23:30:01 C 13 15 00.57 +06 58 28.7 U Z80
2018-03-29 11:05:20 C 13 10 49.75 +08 04 33.8 U T05
2018-03-29 11:19:08 C 13 10 44.44 +08 05 53.6 U T05
2018-03-29 11:19:48 C 13 10 44.20 +08 05 57.4 U T05
2018-03-29 11:38:36 C 13 10 36.97 +08 07 46.1 U T05
2018-03-29 11:42:40 C 13 10 35.41 +08 08 09.3 U T05
2018-04-03 01:16:41 C 12 20 40.42 +20 09 25.2 q W33
2018-04-03 01:51:50 C 12 20 20.64 +20 13 40.1 q W33
2018-04-03 02:26:51 C 12 20 00.81 +20 17 54.3 q W33
2018-04-03 19:20:27 C 12 10 23.81 +22 19 56.6 q 006
2018-04-03 19:21:31 C 12 10 23.16 +22 20 04.5 q 006
2018-04-03 19:22:32 C 12 10 22.56 +22 20 11.5 q 006
2018-04-03 19:23:32 C 12 10 21.96 +22 20 19.1 q 006
2018-04-03 19:24:33 C 12 10 21.37 +22 20 26.4 q 006
2018-04-03 19:25:34 C 12 10 20.75 +22 20 33.8 q 006
2018-04-03 19:26:36 C 12 10 20.13 +22 20 41.5 q 006
2018-04-03 19:27:37 C 12 10 19.54 +22 20 48.8 q 006
2018-04-03 21:10:03 C 12 09 17.39 +22 33 09.6 U G34
2018-04-03 21:12:03 C 12 09 16.22 +22 33 23.8 U G34
2018-04-03 21:13:51 C 12 09 15.11 +22 33 37.3 U G34
2018-04-03 21:16:27 C 12 09 13.55 +22 33 56.2 U G34
2018-04-03 21:40:02 C 12 09 00.03 +22 36 46.7 U J69
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)