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
2023-01-31 01:51:17 C 13 58 16.375 -26 42 04.21 V M22
2023-01-31 01:59:06 C 13 58 15.862 -26 42 02.41 V M22
2023-01-31 02:20:34 C 13 58 14.494 -26 41 58.88 V M22
2023-02-01 01:10:11 C 13 56 51.701 -26 37 02.60 V M22
2023-02-01 01:37:43 C 13 56 49.822 -26 36 56.88 V M22
2023-02-01 01:43:39 C 13 56 49.438 -26 36 55.76 V M22
2023-02-01 01:52:23 C 13 56 48.871 -26 36 54.29 V M22
2023-02-02 08:12:19 C 13 54 50.563 -26 29 40.81 V W68
2023-02-02 08:26:26 C 13 54 49.541 -26 29 37.21 V W68
2023-02-02 08:31:00 C 13 54 49.234 -26 29 36.02 V W68
2023-02-02 08:41:15 C 13 54 48.478 -26 29 33.61 V W68
2023-02-05 01:44:03 C 13 50 02.830 -26 10 58.51 V M22
2023-02-05 01:47:17 C 13 50 02.582 -26 10 57.04 V M22
2023-02-05 01:55:41 C 13 50 01.757 -26 10 54.37 V M22
2023-02-05 02:13:54 C 13 50 00.326 -26 10 49.15 V M22
2023-02-06 07:21:39 C 13 47 36.811 -26 00 55.69 V W68
2023-02-06 07:26:14 C 13 47 36.425 -26 00 54.40 V W68
2023-02-06 07:31:07 C 13 47 35.966 -26 00 52.52 V W68
2023-02-06 07:43:36 C 13 47 34.855 -26 00 49.07 V W68
2023-02-07 07:42:32 C 13 45 28.404 -25 51 50.29 V W68
2023-02-07 07:45:08 C 13 45 28.207 -25 51 48.89 V W68
2023-02-07 07:53:02 C 13 45 27.466 -25 51 46.76 V W68
2023-02-07 08:02:06 C 13 45 26.570 -25 51 43.27 V W68
2023-02-16 06:57:18 C 13 20 11.268 -23 46 04.94 V W68
2023-02-16 06:59:54 C 13 20 10.867 -23 46 03.25 V W68
2023-02-16 07:07:35 C 13 20 09.662 -23 45 56.66 V W68
2023-02-16 07:15:25 C 13 20 08.460 -23 45 50.29 V W68
2023-02-20 06:19:15 C 13 04 34.702 -22 13 19.92 V W68
2023-02-20 06:22:29 C 13 04 34.104 -22 13 16.28 V W68
2023-02-20 06:28:26 C 13 04 32.976 -22 13 09.41 V W68
2023-02-20 06:42:39 C 13 04 30.324 -22 12 53.71 V W68
2023-02-23 00:00:29 C 12 52 01.759 -20 50 58.45 V M22
2023-02-23 00:03:05 C 12 52 01.207 -20 50 54.67 V M22
2023-02-23 00:40:25 C 12 51 53.395 -20 50 03.37 V M22
2023-02-23 00:48:49 C 12 51 51.619 -20 49 51.89 V M22
2023-02-24 04:50:55 C 12 46 03.485 -20 09 22.32 V W68
2023-02-24 04:53:30 C 12 46 02.916 -20 09 18.47 V W68
2023-02-24 05:00:46 C 12 46 01.332 -20 09 07.74 V W68
2023-02-24 05:08:37 C 12 45 59.628 -20 08 56.15 V W68
2023-02-27 00:20:26 C 12 30 57.818 -18 17 54.31 V M22
2023-02-27 00:24:20 C 12 30 56.868 -18 17 47.36 V M22
2023-02-27 00:31:32 C 12 30 55.114 -18 17 34.33 V M22
2023-02-28 06:30:46 C 12 23 45.139 -17 21 24.26 V W68
2023-02-28 07:10:45 C 12 23 35.086 -17 20 06.50 V W68
2023-02-28 07:49:58 C 12 23 25.198 -17 18 49.72 V W68
2023-03-01 22:57:00 C 12 13 41.302 -15 59 03.01 V M22
2023-03-01 23:00:55 C 12 13 40.265 -15 58 54.37 V M22
2023-03-01 23:34:52 C 12 13 31.373 -15 57 42.41 V M22
2023-03-03 00:41:49 C 12 07 02.292 -15 02 44.23 V M22
2023-03-03 00:46:34 C 12 07 01.056 -15 02 34.01 V M22
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)