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
2016-04-12 20:33:32 C 08 47 09.58 +18 06 30.4 q 160
2016-04-12 20:36:34 C 08 47 09.49 +18 06 32.4 q 160
2016-04-13 03:45:37 S 08 46 57.51 +18 11 28.7 L C51
2016-04-13 06:54:18 S 08 46 52.13 +18 13 34.5 L C51
2016-04-13 06:54:29 S 08 46 52.10 +18 13 34.6 L C51
2016-04-13 10:03:10 S 08 46 46.78 +18 15 39.9 L C51
2016-04-13 11:37:25 S 08 46 44.17 +18 16 41.4 L C51
2016-04-13 13:11:51 S 08 46 41.54 +18 17 44.1 L C51
2016-04-13 14:46:17 S 08 46 38.88 +18 18 45.4 L C51
2016-04-13 21:03:39 S 08 46 28.77 +18 22 50.6 L C51
2016-04-19 03:18:29 C 08 44 08.77 +19 34 43.1 q 703
2016-04-19 03:24:16 C 08 44 08.61 +19 34 46.8 q 703
2016-04-19 03:30:04 C 08 44 08.62 +19 34 50.3 q 703
2016-04-19 03:35:52 C 08 44 08.47 +19 34 52.7 q 703
2016-05-02 06:14:33 C 08 44 52.217 +21 33 54.14 L F51
2016-05-02 06:31:51 C 08 44 52.379 +21 33 58.84 L F51
2016-05-02 06:49:07 C 08 44 52.545 +21 34 03.48 L F51
2016-05-02 07:06:24 C 08 44 52.716 +21 34 08.06 L F51
2016-05-16 04:20:47 C 08 51 18.57 +22 46 50.4 q G96
2016-05-16 04:32:55 C 08 51 18.85 +22 46 52.4 q G96
2016-05-16 04:41:36 C 08 51 19.01 +22 46 53.8 q G96
2016-05-16 04:50:16 C 08 51 19.20 +22 46 55.3 q G96
2018-01-20 11:38:36 C 14 09 39.87 -19 13 51.7 U 703
2018-01-20 11:50:56 C 14 09 40.44 -19 13 52.8 U 703
2018-01-20 11:58:45 C 14 09 40.81 -19 13 52.0 U 703
2018-01-20 12:06:35 C 14 09 41.17 -19 13 53.8 U 703
2018-01-27 12:23:52 C 14 17 34.60 -19 29 32.4 U 703
2018-01-27 12:39:43 C 14 17 35.29 -19 29 31.0 U 703
2018-01-27 12:47:38 C 14 17 35.60 -19 29 30.8 U 703
2018-02-27 10:16:11 C 14 36 06.69 -17 36 48.5 U 703
2018-02-27 10:23:24 C 14 36 06.65 -17 36 45.3 U 703
2018-02-27 10:30:38 C 14 36 06.49 -17 36 41.7 U 703
2018-02-27 10:37:51 C 14 36 06.56 -17 36 38.0 U 703
2018-03-17 10:28:07 C 14 14 25.62 -09 35 19.3 U 703
2018-03-17 10:35:44 C 14 14 24.65 -09 35 03.5 U 703
2018-03-17 10:43:22 C 14 14 23.68 -09 34 47.3 U 703
2018-03-17 10:51:00 C 14 14 22.71 -09 34 31.2 U 703
2018-03-17 13:34:19 C 14 14 03.435 -09 28 40.10 U F51
2018-03-17 13:52:15 C 14 14 01.116 -09 28 01.82 U F51
2018-03-17 14:15:19 C 14 13 58.14 -09 27 12.7 U T05
2018-03-17 14:30:25 C 14 13 56.20 -09 26 40.3 U T05
2018-03-17 14:48:30 C 14 13 53.87 -09 26 01.4 U T05
2018-03-17 15:03:37 C 14 13 51.92 -09 25 28.9 U T05
2018-03-19 13:51:53 C 14 07 40.95 -07 36 43.2 U T08
2018-03-19 14:00:10 C 14 07 39.67 -07 36 22.3 U T08
2018-03-19 14:07:04 C 14 07 38.59 -07 36 04.7 U T08
2018-03-19 14:15:31 C 14 07 37.30 -07 35 43.3 U T08
2018-03-19 14:21:35 C 14 07 36.34 -07 35 27.9 U T08
2018-03-19 14:30:08 C 14 07 35.05 -07 35 06.4 U T08
2018-03-19 14:45:38 C 14 07 32.59 -07 34 27.8 U T08
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)