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
2025-02-07 14:48:57 C 14 38 03.974 -19 08 27.67 X F52
2025-02-07 15:14:39 C 14 38 05.140 -19 08 27.22 X F52
2025-02-07 15:27:31 C 14 38 05.720 -19 08 26.99 X F52
2025-02-24 07:25:09 C 14 55 00.307 -18 07 15.17 V W68
2025-02-24 07:29:46 C 14 55 00.485 -18 07 13.22 V W68
2025-02-24 08:00:52 C 14 55 01.394 -18 07 03.54 V W68
2025-02-24 08:04:52 C 14 55 01.531 -18 07 02.14 V W68
2025-02-27 14:03:16 C 14 57 30.483 -17 38 09.65 X F52
2025-02-27 14:19:55 C 14 57 30.887 -17 38 02.61 X F52
2025-02-27 14:36:35 C 14 57 31.290 -17 37 55.58 X F52
2025-02-27 14:53:17 C 14 57 31.694 -17 37 48.46 X F52
2025-03-03 09:03:35 C 14 59 55.872 -16 52 47.21 V W68
2025-03-03 09:13:03 C 14 59 56.042 -16 52 42.02 V W68
2025-03-03 09:17:20 C 14 59 56.131 -16 52 39.54 V W68
2025-03-03 09:24:06 C 14 59 56.251 -16 52 35.54 V W68
2025-03-03 09:39:52 C 14 59 56.518 -16 52 26.40 V W68
2025-03-04 07:47:59 C 15 00 27.286 -16 39 17.14 V W68
2025-03-04 08:27:58 C 15 00 27.960 -16 38 52.51 V W68
2025-03-04 08:58:24 C 15 00 28.426 -16 38 33.76 V W68
2025-03-04 09:07:12 C 15 00 28.505 -16 38 29.15 V W68
2025-03-04 09:10:08 C 15 00 28.637 -16 38 26.20 V W68
2025-03-04 09:29:19 C 15 00 28.918 -16 38 15.22 V W68
2025-03-06 01:13:25 C 15 01 17.822 -16 11 59.39 V M22
2025-03-06 01:21:53 C 15 01 17.930 -16 11 53.38 V M22
2025-03-06 01:54:58 C 15 01 18.348 -16 11 30.26 V M22
2025-03-07 07:30:07 C 15 01 49.217 -15 49 38.50 V W68
2025-03-07 07:32:49 C 15 01 49.258 -15 49 36.52 V W68
2025-03-07 07:36:47 C 15 01 49.301 -15 49 33.64 V W68
2025-03-07 07:44:39 C 15 01 49.363 -15 49 27.55 V W68
2025-03-08 06:59:34 C 15 02 10.471 -15 30 43.74 V W68
2025-03-08 07:04:08 C 15 02 10.510 -15 30 39.89 V W68
2025-03-08 07:38:09 C 15 02 10.790 -15 30 11.81 V W68
2025-03-08 07:42:05 C 15 02 10.826 -15 30 08.53 V W68
2025-03-09 00:49:48 C 15 02 24.420 -15 15 21.64 V M22
2025-03-09 00:52:24 C 15 02 24.432 -15 15 19.33 V M22
2025-03-09 01:40:37 C 15 02 24.727 -15 14 37.10 V M22
2025-03-09 01:46:28 C 15 02 24.770 -15 14 31.92 V M22
2025-03-11 00:33:25 C 15 02 52.301 -14 29 35.48 V M22
2025-03-11 00:36:03 C 15 02 52.274 -14 29 32.86 V M22
2025-03-11 00:40:36 C 15 02 52.315 -14 29 28.36 V M22
2025-03-11 00:48:26 C 15 02 52.327 -14 29 20.11 V M22
2025-03-12 06:49:28 C 15 03 02.069 -13 56 34.91 V W68
2025-03-12 06:58:18 C 15 03 02.054 -13 56 24.54 V W68
2025-03-12 07:36:33 C 15 03 01.908 -13 55 40.91 V W68
2025-03-12 07:43:43 C 15 03 01.884 -13 55 32.38 V W68
2025-03-12 12:36:12 C 15 03 03.178 -13 50 16.08 V T08
2025-03-12 12:38:50 C 15 03 03.185 -13 50 12.88 V T08
2025-03-12 12:42:51 C 15 03 03.163 -13 50 08.23 V T08
2025-03-12 12:51:24 C 15 03 03.106 -13 49 58.15 V T08
2025-03-13 00:18:56 C 15 03 04.855 -13 35 52.12 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)