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
2021-02-22 07:22:24 C 05 22 52.26 -27 37 52.5 V T08
2021-02-22 07:32:22 C 05 22 56.42 -27 36 30.0 V T08
2021-02-22 07:46:59 C 05 23 02.54 -27 34 28.9 V T08
2021-02-22 15:12:33 C 05 26 13.83 -26 33 59.3 V M46
2021-02-22 15:21:08 C 05 26 17.33 -26 32 50.1 V M46
2021-02-22 15:30:43 C 05 26 21.11 -26 31 32.2 V M46
2021-02-22 15:40:48 C 05 26 24.91 -26 30 15.5 V M46
2021-02-22 15:50:54 C 05 26 29.19 -26 28 50.4 V M46
2021-02-22 16:00:59 C 05 26 33.31 -26 27 29.4 V M46
2021-02-22 16:12:06 C 05 26 37.55 -26 25 59.3 V M46
2021-02-23 15:22:01 C 05 35 39.76 -23 24 46.5 V M46
2021-02-23 15:27:06 C 05 35 41.57 -23 24 07.6 V M46
2021-02-23 15:32:11 C 05 35 43.32 -23 23 31.2 V M46
2021-02-23 15:35:43 C 05 35 44.53 -23 23 04.4 V M46
2021-02-23 15:40:48 C 05 35 46.40 -23 22 25.6 V M46
2021-02-23 15:49:57 C 05 35 49.60 -23 21 16.1 V M46
2021-02-23 16:00:06 C 05 35 53.06 -23 20 00.0 V M46
2021-02-23 16:10:14 C 05 35 56.68 -23 18 43.1 V M46
2021-02-23 16:21:25 C 05 36 00.62 -23 17 17.2 V M46
2021-02-25 04:27:21 C 05 48 05.57 -18 59 03.7 V 703
2021-02-25 04:35:12 C 05 48 07.88 -18 58 10.7 V 703
2021-02-25 04:43:04 C 05 48 10.22 -18 57 17.0 V 703
2021-02-25 04:50:55 C 05 48 12.51 -18 56 25.0 V 703
2021-02-25 10:51:31 S 05 50 02.537 -18 15 36.68 L C51
2021-02-25 13:59:50 S 05 50 58.375 -17 54 56.48 L C51
2021-02-25 17:08:09 S 05 51 53.414 -17 34 28.85 L C51
2021-02-25 20:16:39 S 05 52 47.774 -17 14 13.56 L C51
2021-02-25 21:50:43 S 05 53 14.609 -17 04 11.10 L C51
2021-02-25 23:24:58 S 05 53 41.333 -16 54 10.98 L C51
2021-02-26 00:15:36 C 05 53 56.54 -16 49 28.5 V W46
2021-02-26 00:17:39 C 05 53 56.08 -16 48 22.2 q 834
2021-02-26 00:19:18 C 05 53 57.51 -16 49 05.0 V W46
2021-02-26 00:21:19 C 05 53 58.06 -16 48 52.1 V W46
2021-02-26 00:57:35 C 05 54 06.79 -16 44 09.7 q 834
2021-02-26 00:59:13 S 05 54 07.853 -16 44 14.35 L C51
2021-02-26 04:07:32 S 05 55 00.326 -16 24 30.85 L C51
2021-02-26 05:41:36 S 05 55 26.266 -16 14 43.76 L C51
2021-02-26 05:41:47 S 05 55 26.297 -16 14 43.30 L C51
2021-02-26 07:15:51 S 05 55 52.075 -16 04 59.63 L C51
2021-02-26 07:45:35 C 05 55 59.27 -16 02 22.2 V T08
2021-02-26 07:50:14 C 05 56 00.46 -16 01 53.4 V T08
2021-02-26 07:58:12 C 05 56 02.55 -16 01 04.0 V T08
2021-02-26 08:12:47 C 05 56 06.35 -15 59 33.5 V T08
2021-02-26 08:50:06 S 05 56 17.719 -15 55 18.08 L C51
2021-02-26 10:24:10 S 05 56 43.147 -15 45 40.61 L C51
2021-02-26 13:32:40 S 05 57 33.595 -15 26 33.32 L C51
2021-02-26 16:40:59 S 05 58 23.323 -15 07 38.78 L C51
2021-02-26 19:49:18 S 05 59 12.410 -14 48 56.05 L C51
2021-02-28 20:45:14 C 06 10 42.80 -10 22 28.1 V G17
2021-02-28 20:50:35 C 06 10 43.92 -10 22 00.6 V G17
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)