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
2011-03-26 00:21:03 C 12 31 08.81 +03 13 20.9 c A24
2011-03-26 00:26:28 C 12 31 06.94 +03 13 42.5 c A24
2011-03-26 00:41:57 C 12 31 01.59 +03 14 45.7 c A24
2011-03-27 07:12:08 C 12 20 25.90 +05 20 34.3 r G96
2011-03-27 07:22:59 C 12 20 21.87 +05 21 19.9 r G96
2011-03-27 07:33:48 C 12 20 17.88 +05 22 05.6 r G96
2011-03-27 07:44:38 C 12 20 13.88 +05 22 51.2 r G96
2011-03-28 07:06:31 C 12 11 40.35 +07 02 50.3 15.6 c 704
2011-03-28 07:24:03 C 12 11 33.60 +07 04 06.5 15.7 c 704
2011-03-28 07:41:36 C 12 11 26.85 +07 05 22.5 15.8 c 704
2011-03-29 05:46:17 C 12 03 02.60 +08 42 12.3 15.2 c 704
2011-03-29 06:05:30 C 12 02 54.92 +08 43 37.0 15.6 c 704
2011-03-29 06:23:29 C 12 02 47.73 +08 44 57.3 15.4 c 704
2011-03-29 06:41:43 C 12 02 40.45 +08 46 17.7 15.2 c 704
2011-03-29 06:59:49 C 12 02 33.17 +08 47 38.1 15.2 c 704
2011-03-29 21:39:58 C 11 56 47.62 +09 52 48.5 c A53
2011-03-29 21:41:43 C 11 56 46.86 +09 52 56.1 c A53
2011-03-29 21:46:01 C 11 56 45.12 +09 53 15.6 c A53
2011-03-29 21:50:28 C 11 56 43.30 +09 53 35.4 c A53
2011-03-29 22:42:05 C 11 56 22.08 +09 57 24.2 o 046
2011-03-29 22:43:15 C 11 56 21.59 +09 57 29.4 o 046
2011-03-29 22:44:22 C 11 56 21.13 +09 57 34.3 o 046
2011-03-29 22:45:19 C 11 56 20.75 +09 57 38.6 o 046
2011-03-29 22:46:12 C 11 56 20.40 +09 57 42.3 o 046
2011-03-29 22:48:01 C 11 56 19.65 +09 57 50.8 o 046
2011-03-31 05:47:13 C 11 43 43.39 +12 17 23.7 15.4 c 704
2011-03-31 06:05:07 C 11 43 35.75 +12 18 44.2 15.7 c 704
2011-03-31 06:22:49 C 11 43 28.19 +12 20 03.6 15.5 c 704
2011-03-31 06:40:39 C 11 43 20.56 +12 21 24.1 15.5 c 704
2011-03-31 06:58:17 C 11 43 13.02 +12 22 43.8 15.6 c 704
2011-04-01 07:05:59 C 11 33 02.62 +14 11 21.5 15.2 c 704
2011-04-01 07:24:55 C 11 32 54.32 +14 12 46.1 15.1 c 704
2011-04-01 08:02:50 C 11 32 37.70 +14 15 35.6 15.5 c 704
2011-04-01 08:21:52 C 11 32 29.37 +14 17 01.0 15.4 c 704
2011-04-01 23:15:04 C 11 26 06.16 +15 23 23.2 c A24
2011-04-01 23:28:52 C 11 26 00.06 +15 24 24.2 c A24
2011-04-01 23:33:42 C 11 25 57.90 +15 24 45.7 c A24
2011-04-01 23:52:21 C 11 25 49.67 +15 26 08.2 c A24
2011-04-01 23:57:11 C 11 25 47.53 +15 26 29.7 c A24
2011-04-02 00:11:00 C 11 25 41.40 +15 27 30.9 c A24
2011-04-02 05:35:06 C 11 23 22.07 +15 51 39.9 15.6 c 704
2011-04-02 05:52:29 C 11 23 14.23 +15 52 56.4 15.6 c 704
2011-04-02 06:09:50 C 11 23 06.46 +15 54 13.2 15.7 c 704
2011-04-02 06:27:11 C 11 22 58.77 +15 55 30.1 15.7 c 704
2011-04-02 19:01:03 C 11 17 30.81 +16 50 33.2 u 557
2011-04-02 20:02:32 C 11 17 03.30 +16 55 03.3 u 557
2011-04-02 21:01:33 C 11 16 36.82 +16 59 21.4 u 557
2011-04-02 22:04:36 C 11 16 08.42 +17 03 57.0 u 557
2011-04-02 22:42:10 C 11 15 51.74 +17 06 43.8 c A24
2011-04-02 22:51:03 C 11 15 47.57 +17 07 19.8 o 046
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)