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
2014-03-11 21:51:33 C 06 09 17.81 +04 53 24.2 q 160
2014-03-11 21:55:22 C 06 09 18.46 +04 53 30.2 q 160
2014-03-12 19:22:01 C 06 13 12.68 +05 35 04.9 q 160
2014-03-12 19:25:58 C 06 13 13.38 +05 35 13.5 q 160
2014-03-12 19:30:00 C 06 13 14.20 +05 35 21.1 q 160
2014-03-14 01:24:11 C 06 18 24.16 +06 29 28.0 u H21
2014-03-14 01:27:56 C 06 18 24.79 +06 29 34.8 u H21
2014-03-14 01:31:45 C 06 18 25.39 +06 29 41.4 u H21
2014-03-14 01:35:37 C 06 18 26.02 +06 29 48.1 u H21
2014-03-16 18:43:20 C 06 28 46.32 +08 13 56.2 t 240
2014-03-16 18:45:25 C 06 28 46.62 +08 13 59.4 t 240
2014-03-16 18:48:03 C 06 28 46.98 +08 14 03.3 t 240
2014-03-16 18:54:19 C 06 28 47.88 +08 14 12.6 t 240
2014-03-17 21:14:36 C 06 32 39.73 +08 51 40.3 q C77
2014-03-17 21:22:35 C 06 32 40.87 +08 51 51.4 q C77
2014-03-17 21:31:04 C 06 32 42.05 +08 52 03.0 q C77
2014-03-18 02:09:37 C 06 33 22.36 +08 58 26.3 u H21
2014-03-18 02:14:06 C 06 33 22.98 +08 58 32.7 u H21
2014-03-18 02:17:48 C 06 33 23.49 +08 58 37.5 u H21
2014-03-18 19:25:03 C 06 35 48.69 +09 21 22.4 q 160
2014-03-18 19:28:41 C 06 35 49.15 +09 21 26.9 q 160
2014-03-18 19:32:18 C 06 35 49.62 +09 21 31.5 q 160
2014-03-19 19:23:39 C 06 39 05.88 +09 51 42.6 q 160
2014-03-19 19:27:37 C 06 39 06.38 +09 51 47.5 q 160
2014-03-19 19:31:34 C 06 39 06.88 +09 51 52.4 q 160
2014-03-19 22:11:13 C 06 39 28.03 +09 55 11.8 q G40
2014-03-19 22:29:37 C 06 39 30.45 +09 55 34.8 q G40
2014-03-19 22:51:10 C 06 39 33.25 +09 56 00.2 q G40
2014-04-01 11:28:52 C 07 13 51.58 +14 19 53.5 q D29
2014-04-01 12:04:39 C 07 13 55.01 +14 20 15.7 q D29
2014-04-01 12:40:26 C 07 13 58.40 +14 20 37.9 q D29
2014-05-18 06:12:20 C 08 47 04.983 +18 01 09.41 L F51
2014-05-18 06:19:21 C 08 47 05.509 +18 01 09.00 L F51
2016-01-28 21:11:43 S 14 06 27.27 -30 32 11.0 L C51
2016-01-29 01:55:01 S 14 06 01.24 -30 31 09.8 L C51
2016-01-29 03:29:27 S 14 05 52.55 -30 30 49.3 L C51
2016-01-29 05:03:42 S 14 05 43.80 -30 30 28.5 L C51
2016-01-29 05:03:53 S 14 05 43.79 -30 30 27.9 L C51
2016-01-31 07:28:18 C 14 00 51.61 -30 18 28.4 q Y00
2016-01-31 07:41:43 C 14 00 50.09 -30 18 25.4 q Y00
2016-01-31 07:55:16 C 14 00 48.67 -30 18 21.1 q Y00
2016-02-10 09:08:16 C 13 29 34.68 -28 33 54.9 R G45
2016-02-10 09:14:55 C 13 29 33.55 -28 33 50.4 R G45
2016-02-10 09:21:30 C 13 29 32.44 -28 33 46.2 R G45
2016-02-10 09:28:07 C 13 29 31.32 -28 33 41.8 R G45
2016-02-10 09:34:37 C 13 29 30.22 -28 33 37.9 R G45
2016-02-10 09:38:12 C 13 29 29.62 -28 33 35.4 R G45
2016-02-10 09:51:12 C 13 29 27.39 -28 33 27.3 R G45
2016-02-10 09:57:50 C 13 29 26.29 -28 33 22.6 R G45
2016-02-10 10:04:17 C 13 29 25.17 -28 33 18.3 R G45
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)