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
2007-03-06 20:49:18 C 04 57 11.64 +00 45 32.0 c J92
2007-03-07 02:51:51 C 04 59 04.86 +01 00 41.7 o 644
2007-03-07 03:22:00 C 04 59 14.01 +01 01 56.4 o 644
2007-03-07 03:52:00 C 04 59 23.11 +01 03 10.4 o 644
2007-03-11 20:03:53 C 05 30 22.13 +05 06 57.3 c A24
2007-03-11 20:42:43 C 05 30 31.38 +05 08 09.9 c A24
2007-03-12 02:59:18 C 05 32 04.02 +05 20 04.3 r 703
2007-03-12 03:07:05 C 05 32 05.78 +05 20 17.9 r 703
2007-03-12 03:14:47 C 05 32 07.65 +05 20 32.2 r 703
2007-03-12 19:27:31 C 05 36 00.81 +05 50 04.6 c A24
2007-03-12 19:40:19 C 05 36 03.81 +05 50 28.3 c A24
2007-03-12 19:53:07 C 05 36 06.77 +05 50 51.2 c A24
2007-03-12 20:04:30 C 05 36 09.51 +05 51 11.2 c A24
2007-03-12 20:05:56 C 05 36 09.70 +05 51 13.1 c A24
2007-03-12 20:17:19 C 05 36 12.41 +05 51 34.2 c A24
2007-03-12 20:24:27 C 05 36 14.01 +05 51 46.8 c A24
2007-03-12 20:30:08 C 05 36 15.30 +05 51 56.7 c A24
2007-03-12 20:39:25 C 05 36 17.48 +05 52 13.6 c A24
2007-03-12 20:46:48 C 05 36 19.18 +05 52 27.0 c A24
2007-03-13 19:54:51 C 05 41 39.35 +06 32 38.8 c A24
2007-03-13 20:31:50 C 05 41 47.64 +06 33 41.0 c A24
2007-03-14 04:08:32 C 05 43 29.78 +06 46 27.6 r 703
2007-03-14 04:18:39 C 05 43 32.01 +06 46 44.6 r 703
2007-03-14 04:28:49 C 05 43 34.21 +06 47 01.2 r 703
2007-03-14 04:38:55 C 05 43 36.44 +06 47 17.5 r 703
2007-03-14 20:01:18 C 05 46 58.85 +07 12 11.0 c A24
2007-03-14 20:22:11 C 05 47 03.29 +07 12 43.4 c A24
2007-03-14 20:33:03 C 05 47 05.59 +07 13 00.7 c A24
2007-03-14 20:39:53 C 05 47 07.04 +07 13 11.4 c A24
2007-03-14 20:46:38 C 05 47 08.47 +07 13 22.2 c A24
2007-03-14 20:53:17 C 05 47 09.88 +07 13 32.8 c A24
2007-03-14 21:04:47 C 05 47 12.32 +07 13 51.0 c A24
2008-01-11 12:31:10 C 14 57 58.24 -16 46 48.7 r G96
2008-01-11 12:39:08 C 14 57 59.14 -16 46 49.9 r G96
2008-01-11 12:47:07 C 14 58 00.15 -16 46 53.5 r G96
2008-01-11 12:55:11 C 14 58 01.12 -16 46 55.5 r G96
2009-01-28 16:23:56 C 14 17 55.14 -35 52 19.6 r E12
2009-01-28 16:39:25 C 14 17 52.62 -35 52 16.7 r E12
2009-01-28 16:54:55 C 14 17 50.06 -35 52 14.1 r E12
2009-01-28 17:10:58 C 14 17 47.40 -35 52 11.9 r E12
2009-02-07 14:33:45 C 13 32 13.84 -34 12 15.2 r E12
2009-02-07 14:51:04 C 13 32 09.74 -34 12 03.7 r E12
2009-02-07 15:08:04 C 13 32 05.71 -34 11 51.7 r E12
2009-02-07 15:25:17 C 13 32 01.57 -34 11 40.1 r E12
2009-03-02 00:11:38 C 10 44 35.72 -14 38 20.8 o J93
2009-03-02 00:16:41 C 10 44 34.14 -14 38 04.6 o J93
2009-03-02 00:26:47 C 10 44 30.75 -14 37 27.2 o J93
2009-03-16 20:18:33 C 09 19 55.15 +03 47 08.5 w 160
2009-03-16 20:23:39 C 09 19 54.31 +03 47 20.4 w 160
2009-03-16 20:28:55 C 09 19 53.45 +03 47 32.7 w 160
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)