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
2023-03-27 14:20:55 C 09 41 24.24 +10 10 15.8 V D29
2023-03-27 14:43:50 C 09 41 20.20 +10 10 59.6 V D29
2023-03-28 04:13:04 C 09 39 05.216 +10 36 31.72 V G96
2023-03-28 04:21:08 C 09 39 03.827 +10 36 46.73 V G96
2023-03-28 04:29:13 C 09 39 02.437 +10 37 01.81 V G96
2023-03-28 04:37:17 C 09 39 01.044 +10 37 17.00 V G96
2023-03-28 04:47:53 C 09 38 59.230 +10 37 36.77 V 703
2023-03-28 04:55:30 C 09 38 57.908 +10 37 50.81 V 703
2023-03-28 05:03:07 C 09 38 56.627 +10 38 05.14 V 703
2023-03-28 05:10:48 C 09 38 55.295 +10 38 19.43 V 703
2023-03-29 16:41:54 C 09 33 16.85 +11 42 03.6 q 168
2023-03-29 17:58:30 C 09 33 04.82 +11 44 16.5 q 168
2023-03-29 19:14:32 C 09 32 52.98 +11 46 27.1 q 168
2023-03-29 20:13:22 C 09 32 44.316 +11 48 45.90 V M22
2023-03-29 20:17:59 C 09 32 43.586 +11 48 54.11 V M22
2023-03-29 20:25:57 C 09 32 42.326 +11 49 07.90 V M22
2023-03-30 01:11:08 C 09 31 59.820 +11 57 15.26 V W68
2023-03-30 01:14:29 C 09 31 59.290 +11 57 20.95 V W68
2023-03-30 01:56:31 C 09 31 52.697 +11 58 33.06 V W68
2023-03-30 02:36:28 C 09 31 46.447 +11 59 40.74 V W68
2023-04-06 20:58:41 C 09 09 11.078 +16 21 05.18 V M22
2023-04-06 21:29:04 C 09 09 08.050 +16 21 39.42 V M22
2023-04-06 21:33:20 C 09 09 07.620 +16 21 43.38 V M22
2023-04-06 21:41:43 C 09 09 06.768 +16 21 53.21 V M22
2023-04-07 14:19:54 C 09 07 34.22 +16 40 06.2 V D29
2023-04-07 14:32:15 C 09 07 33.07 +16 40 19.5 V D29
2023-04-07 14:44:37 C 09 07 31.88 +16 40 33.2 V D29
2023-04-08 02:31:03 C 09 06 28.951 +16 53 41.35 V W68
2023-04-08 02:36:18 C 09 06 28.486 +16 53 46.82 V W68
2023-04-08 02:46:17 C 09 06 27.518 +16 53 57.34 V W68
2023-04-08 03:01:38 C 09 06 26.162 +16 54 14.00 V W68
2023-04-09 05:03:12 C 09 04 13.926 +17 20 53.30 V 703
2023-04-09 05:10:54 C 09 04 13.328 +17 21 01.98 V 703
2023-04-09 05:18:36 C 09 04 12.598 +17 21 09.61 V 703
2023-04-09 05:26:18 C 09 04 11.935 +17 21 16.78 V 703
2023-04-09 07:10:30 C 09 04 03.874 +17 23 06.72 V T05
2023-04-09 07:18:41 C 09 04 03.130 +17 23 14.96 V T05
2023-04-09 07:19:59 C 09 04 03.000 +17 23 16.33 V T05
2023-04-09 07:25:57 C 09 04 02.501 +17 23 22.38 V T05
2023-04-09 07:37:07 C 09 04 01.498 +17 23 33.43 V T05
2023-04-09 07:42:23 C 09 04 01.118 +17 23 38.18 V T05
2023-04-11 01:32:35 S 09 00 49.52 +18 03 51.1 L C51
2023-04-11 04:39:48 S 09 00 36.09 +18 06 41.6 L C51
2023-04-11 06:13:19 S 09 00 29.44 +18 08 07.3 L C51
2023-04-11 07:47:01 S 09 00 22.75 +18 09 32.0 L C51
2023-04-11 09:20:32 S 09 00 16.18 +18 10 57.1 L C51
2023-04-11 12:27:34 S 09 00 03.08 +18 13 45.3 L C51
2023-04-11 12:27:44 S 09 00 03.04 +18 13 45.3 L C51
2023-04-12 04:37:23 C 08 58 56.435 +18 27 55.73 V 703
2023-04-12 04:44:54 C 08 58 55.873 +18 28 01.92 V 703
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)