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
2004-03-22 20:25:55 C 11 58 29.10 +01 50 36.5 c J93
2004-03-22 20:27:59 C 11 58 28.41 +01 50 43.2 c J93
2004-03-22 20:30:02 C 11 58 27.82 +01 50 50.7 c J93
2004-03-22 20:32:04 C 11 58 27.16 +01 50 57.0 c J93
2004-03-23 06:13:07 C 11 55 21.16 +02 24 10.7 m 683
2004-03-23 06:32:20 C 11 55 14.88 +02 25 15.6 m 683
2004-03-23 06:51:28 C 11 55 08.45 +02 26 22.7 m 683
2004-03-24 11:01:51 C 11 46 01.56 +04 04 29.2 r D85
2004-03-24 11:04:10 C 11 46 00.76 +04 04 37.2 r D85
2004-03-24 11:06:27 C 11 45 59.97 +04 04 45.5 r D85
2004-03-25 23:10:34 C 11 33 59.13 +06 10 19.8 c A32
2004-03-25 23:13:49 C 11 33 58.02 +06 10 31.1 c A32
2004-03-25 23:17:02 C 11 33 56.91 +06 10 42.5 c A32
2004-03-25 23:21:53 C 11 33 55.27 +06 10 59.5 c A32
2004-03-26 00:25:10 C 11 33 33.73 +06 14 44.7 c J93
2004-03-26 00:28:14 C 11 33 32.67 +06 14 55.8 c J93
2004-03-26 00:31:18 C 11 33 31.71 +06 15 05.4 c J93
2004-03-26 00:35:57 C 11 33 30.03 +06 15 22.3 c J93
2004-03-26 00:39:00 C 11 33 29.29 +06 15 30.9 c J93
2004-03-27 20:43:11 C 11 18 34.03 +08 50 13.5 r A17
2004-03-27 21:37:31 C 11 18 15.08 +08 53 25.1 o 151
2004-03-27 21:38:13 C 11 18 14.82 +08 53 27.5 o 151
2004-03-27 21:38:47 C 11 18 14.61 +08 53 29.5 o 151
2004-03-27 21:39:35 C 11 18 14.35 +08 53 32.3 o 151
2004-03-27 21:40:11 C 11 18 14.13 +08 53 34.4 o 151
2004-03-27 21:41:11 C 11 18 13.80 +08 53 37.9 o 151
2004-03-27 22:16:39 C 11 18 01.38 +08 55 42.2 r 130
2004-03-27 22:19:45 C 11 18 00.35 +08 55 50.5 r A17
2004-03-27 22:19:47 C 11 18 00.27 +08 55 52.4 r 130
2004-03-27 22:22:54 C 11 17 59.21 +08 56 03.2 r 130
2004-03-27 22:26:03 C 11 17 58.08 +08 56 14.5 r 130
2004-03-27 22:28:24 C 11 17 57.29 +08 56 21.9 r 130
2004-03-28 05:43:04 C 11 15 29.60 +09 21 41.9 c 670
2004-03-28 06:44:57 C 11 15 07.38 +09 25 17.2 16.0 c 704
2004-03-28 06:47:33 C 11 15 06.97 +09 25 26.1 c 670
2004-03-28 06:59:58 C 11 15 02.11 +09 26 09.3 16.1 c 704
2004-03-28 07:14:59 C 11 14 56.83 +09 27 01.3 16.0 c 704
2004-03-28 07:30:06 C 11 14 51.54 +09 27 53.7 16.1 c 704
2004-03-28 07:45:10 C 11 14 46.25 +09 28 45.9 16.1 c 704
2004-03-28 07:56:58 C 11 14 42.58 +09 29 26.5 c 670
2004-03-28 13:35:04 C 11 12 47.59 +09 48 57.1 r 379
2004-03-28 13:43:39 C 11 12 44.61 +09 49 26.3 r 379
2004-03-28 13:45:48 C 11 12 43.87 +09 49 33.7 r 379
2004-03-28 13:47:58 C 11 12 43.05 +09 49 42.2 r 379
2004-03-28 20:26:43 C 11 10 27.60 +10 12 29.3 r A16
2004-03-28 20:30:33 C 11 10 26.26 +10 12 43.3 r A16
2004-03-28 20:34:54 C 11 10 24.74 +10 12 57.6 r A16
2004-03-28 20:43:16 C 11 10 21.90 +10 13 23.8 c 127
2004-03-28 20:46:47 C 11 10 20.60 +10 13 38.6 r A16
2004-03-28 20:49:56 C 11 10 19.58 +10 13 47.0 c 127
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)