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
2023-03-03 01:24:33 C 12 06 50.846 -15 01 08.33 V M22
2023-03-03 01:32:35 C 12 06 48.689 -15 00 50.04 V M22
2023-03-03 04:42:48 C 12 06 00.358 -14 53 42.04 V W68
2023-03-03 04:45:24 C 12 05 59.678 -14 53 36.10 V W68
2023-03-03 05:18:58 C 12 05 50.604 -14 52 20.57 V W68
2023-03-03 06:46:09 C 12 05 27.062 -14 49 02.32 V W68
2023-03-03 07:26:54 C 12 05 16.032 -14 47 29.62 V W68
2023-03-03 07:45:04 C 12 05 12.397 -14 47 20.29 V 703
2023-03-03 07:52:51 C 12 05 10.298 -14 47 02.87 V 703
2023-03-03 08:00:38 C 12 05 08.196 -14 46 45.19 V 703
2023-03-03 08:08:25 C 12 05 06.061 -14 46 27.88 V 703
2023-03-04 06:39:47 C 11 59 07.658 -13 53 32.53 V W68
2023-03-04 06:59:25 C 11 59 02.244 -13 52 45.70 V W68
2023-03-04 07:40:14 C 11 58 51.022 -13 51 08.28 V W68
2023-03-04 07:50:32 C 11 58 48.192 -13 50 43.84 V W68
2023-03-06 03:49:16 C 11 46 54.962 -12 02 14.78 V W68
2023-03-06 03:51:53 C 11 46 54.221 -12 02 08.27 V W68
2023-03-06 03:56:28 C 11 46 52.913 -12 01 56.32 V W68
2023-03-06 04:04:16 C 11 46 50.731 -12 01 36.98 V W68
2023-03-10 21:15:49 C 11 15 21.33 -06 54 39.6 X L99
2023-03-10 21:19:11 C 11 15 20.36 -06 54 29.4 X L99
2023-03-10 21:22:26 C 11 15 19.49 -06 54 21.5 X L99
2023-03-11 06:10:51 C 11 12 51.473 -06 28 35.94 V W68
2023-03-11 06:15:23 C 11 12 50.170 -06 28 23.23 V W68
2023-03-11 06:24:41 C 11 12 47.527 -06 27 56.63 V W68
2023-03-11 06:40:34 C 11 12 42.982 -06 27 11.16 V W68
2023-03-12 21:38:43 C 11 01 58.70 -04 36 06.6 V M26
2023-03-12 21:42:18 C 11 01 57.71 -04 35 56.5 V M26
2023-03-12 21:45:52 C 11 01 56.69 -04 35 46.0 V M26
2023-03-12 22:03:41 C 11 01 51.70 -04 34 55.0 V G17
2023-03-12 22:06:30 C 11 01 50.91 -04 34 46.9 V G17
2023-03-12 22:09:19 C 11 01 50.11 -04 34 38.8 V G17
2023-03-13 08:12:13 C 10 59 04.466 -04 05 39.62 V 703
2023-03-13 08:19:57 C 10 59 02.288 -04 05 17.66 V 703
2023-03-13 08:27:40 C 10 59 00.114 -04 04 55.42 V 703
2023-03-13 08:35:23 C 10 58 57.958 -04 04 32.34 V 703
2023-03-13 22:11:17 C 10 55 17.191 -03 24 52.49 V M22
2023-03-13 22:15:50 C 10 55 15.924 -03 24 39.53 V M22
2023-03-13 22:24:18 C 10 55 13.577 -03 24 14.90 V M22
2023-03-13 22:39:18 C 10 55 09.394 -03 23 32.03 V M22
2023-03-14 01:32:34 C 10 54 23.50 -03 15 11.3 834
2023-03-14 02:01:45 C 10 54 15.39 -03 13 47.8 834
2023-03-14 05:41:37 C 10 53 16.300 -03 03 54.68 V G96
2023-03-14 05:49:44 C 10 53 14.053 -03 03 31.50 V G96
2023-03-14 06:07:32 C 10 53 09.121 -03 02 40.49 V G96
2023-03-14 06:17:44 C 10 53 06.295 -03 02 11.26 V G96
2023-03-15 04:52:13 C 10 47 04.166 -01 57 04.75 V W68
2023-03-15 05:00:41 C 10 47 01.862 -01 56 40.74 V W68
2023-03-15 05:06:03 C 10 47 00.396 -01 56 25.26 V W68
2023-03-15 05:51:20 C 10 46 48.072 -01 54 16.27 V W68
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)