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
2023-04-12 04:52:24 C 08 58 55.351 +18 28 08.51 V 703
2023-04-12 04:59:55 C 08 58 54.858 +18 28 14.99 V 703
2023-04-14 04:24:12 C 08 55 59.038 +19 07 20.82 V G96
2023-04-14 04:32:20 C 08 55 58.541 +19 07 27.16 V G96
2023-04-14 04:40:30 C 08 55 58.040 +19 07 33.49 V G96
2023-04-14 04:48:38 C 08 55 57.526 +19 07 39.79 V G96
2023-04-15 06:43:33 C 08 54 32.266 +19 27 31.03 V T05
2023-04-15 06:44:52 C 08 54 32.201 +19 27 32.33 V T05
2023-04-15 06:48:08 C 08 54 31.978 +19 27 34.02 V T05
2023-04-15 06:50:05 C 08 54 31.891 +19 27 36.58 V T05
2023-04-15 06:58:17 C 08 54 31.421 +19 27 41.98 V T05
2023-04-15 07:00:15 C 08 54 31.289 +19 27 43.24 V T05
2023-04-15 07:12:41 C 08 54 30.542 +19 27 52.52 V T05
2023-04-15 07:15:57 C 08 54 30.430 +19 27 55.04 V T05
2023-04-16 01:12:57 C 08 53 35.431 +19 41 14.64 V W68
2023-04-16 01:17:39 C 08 53 35.206 +19 41 18.56 V W68
2023-04-16 01:43:31 C 08 53 33.814 +19 41 37.61 V W68
2023-04-16 01:57:01 C 08 53 33.012 +19 41 46.50 V W68
2023-04-16 04:24:59 C 08 53 25.807 +19 43 12.72 V 703
2023-04-16 04:32:40 C 08 53 25.415 +19 43 18.01 V 703
2023-04-16 04:40:21 C 08 53 24.994 +19 43 23.30 V 703
2023-04-16 04:48:01 C 08 53 24.562 +19 43 28.70 V 703
2023-04-17 06:56:21 C 08 52 11.299 +20 01 37.56 V T05
2023-04-17 07:00:55 C 08 52 11.040 +20 01 40.62 V T05
2023-04-17 07:08:35 C 08 52 10.591 +20 01 45.91 V T05
2023-04-17 07:25:21 C 08 52 09.780 +20 01 56.53 V T05
2023-04-19 04:05:39 C 08 50 19.183 +20 30 38.27 V 703
2023-04-19 04:13:56 C 08 50 18.856 +20 30 41.90 V 703
2023-04-19 04:22:13 C 08 50 18.503 +20 30 48.24 V 703
2023-04-19 04:30:30 C 08 50 18.049 +20 30 52.52 V 703
2023-04-21 06:24:19 C 08 48 34.937 +21 00 10.12 V T05
2023-04-21 06:28:52 C 08 48 34.781 +21 00 12.92 V T05
2023-04-21 06:38:02 C 08 48 34.505 +21 00 17.46 V T05
2023-04-21 06:52:08 C 08 48 33.998 +21 00 25.20 V T05
2023-04-21 23:52:01 C 08 48 03.730 +21 09 58.03 V W68
2023-04-22 00:06:31 C 08 48 03.221 +21 10 06.74 V W68
2023-04-22 00:11:44 C 08 48 03.079 +21 10 09.88 V W68
2023-04-22 00:35:45 C 08 48 02.258 +21 10 21.76 V W68
2023-04-23 06:00:09 C 08 47 14.350 +21 25 33.20 V T05
2023-04-23 06:04:43 C 08 47 14.177 +21 25 34.97 V T05
2023-04-23 06:13:15 C 08 47 13.918 +21 25 39.29 V T05
2023-04-23 06:27:53 C 08 47 13.495 +21 25 47.14 V T05
2023-05-30 03:31:32 C 08 44 26.617 +25 53 11.80 V G96
2023-05-30 03:37:39 C 08 44 26.549 +25 53 13.42 V G96
2023-05-30 03:43:45 C 08 44 26.459 +25 53 15.07 V G96
2023-05-30 03:49:52 C 08 44 26.408 +25 53 16.48 V G96
2025-01-06 15:14:06 C 13 54 32.657 -17 39 57.63 X F51
2025-01-06 15:21:40 C 13 54 33.112 -17 39 59.31 X F51
2025-01-06 15:29:19 C 13 54 33.576 -17 40 00.99 X F51
2025-01-06 15:36:54 C 13 54 34.030 -17 40 02.72 X F51
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)