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
2009-04-30 03:36:56 C 08 42 08.38 +20 13 13.1 r G96
2009-04-30 03:52:37 C 08 42 08.71 +20 13 17.2 r G96
2009-04-30 04:08:20 C 08 42 09.07 +20 13 21.1 r G96
2011-03-09 18:26:30 C 13 54 41.12 -13 33 35.7 o 300
2011-03-09 18:27:54 C 13 54 40.97 -13 33 33.6 o 300
2011-03-09 18:29:17 C 13 54 40.80 -13 33 31.9 o 300
2011-03-09 18:30:41 C 13 54 40.61 -13 33 29.9 o 300
2011-03-13 09:03:56 C 13 43 10.42 -11 15 12.7 16.2 c 704
2011-03-13 09:19:59 C 13 43 07.84 -11 14 44.1 16.8 c 704
2011-03-13 09:36:02 C 13 43 05.30 -11 14 14.3 16.7 c 704
2011-03-13 09:52:12 C 13 43 02.59 -11 13 45.3 18.4 c 704
2011-03-13 10:08:13 C 13 43 00.17 -11 13 15.6 16.5 c 704
2011-03-13 10:33:38 C 13 42 56.19 -11 12 28.9 r 703
2011-03-13 10:43:33 C 13 42 54.61 -11 12 10.6 r 703
2011-03-13 10:53:28 C 13 42 52.99 -11 11 52.6 r 703
2011-03-13 11:03:31 C 13 42 51.40 -11 11 34.0 r 703
2011-03-17 20:29:00 C 13 24 01.02 -07 25 07.3 r 168
2011-03-17 21:38:45 C 13 23 46.15 -07 22 12.7 r 168
2011-03-17 21:41:05 C 13 23 45.60 -07 22 06.5 r 168
2011-03-17 22:43:35 C 13 23 32.26 -07 19 29.7 r 168
2011-03-22 21:59:02 C 12 54 16.66 -01 24 53.3 u 557
2011-03-22 22:30:29 C 12 54 07.50 -01 23 05.1 u 557
2011-03-22 22:59:56 C 12 53 58.90 -01 21 23.5 u 557
2011-03-22 23:30:13 C 12 53 49.97 -01 19 38.5 u 557
2011-03-23 00:00:44 C 12 53 41.02 -01 17 52.7 u 557
2011-03-23 00:30:49 C 12 53 32.18 -01 16 08.5 u 557
2011-03-23 01:00:46 C 12 53 23.36 -01 14 24.4 u 557
2011-03-23 01:30:42 C 12 53 14.55 -01 12 40.3 u 557
2011-03-23 02:00:40 C 12 53 05.74 -01 10 56.2 u 557
2011-03-23 02:31:14 C 12 52 56.75 -01 09 09.4 u 557
2011-03-23 22:19:20 C 12 47 07.77 +00 01 27.5 o A50
2011-03-23 22:20:01 C 12 47 07.56 +00 01 30.0 o A50
2011-03-23 22:20:40 C 12 47 07.36 +00 01 32.4 o A50
2011-03-23 22:45:26 C 12 46 59.70 +00 03 02.6 o A50
2011-03-23 22:46:05 C 12 46 59.49 +00 03 05.0 o A50
2011-03-23 22:46:44 C 12 46 59.29 +00 03 07.4 o A50
2011-03-23 23:11:31 C 12 46 51.61 +00 04 37.8 o A50
2011-03-23 23:12:12 C 12 46 51.39 +00 04 40.3 o A50
2011-03-23 23:12:52 C 12 46 51.19 +00 04 42.7 o A50
2011-03-24 06:03:16 C 12 44 47.58 +00 30 00.5 r 703
2011-03-24 06:12:05 C 12 44 44.77 +00 30 33.4 r 703
2011-03-24 06:20:50 C 12 44 42.00 +00 31 05.7 r 703
2011-03-24 06:29:36 C 12 44 39.22 +00 31 38.3 r 703
2011-03-25 02:42:18 C 12 38 17.86 +01 48 58.5 834
2011-03-25 03:09:52 C 12 38 08.71 +01 50 45.1 834
2011-03-25 03:25:11 C 12 38 03.64 +01 51 44.6 834
2011-03-25 03:49:13 C 12 37 55.67 +01 53 17.5 834
2011-03-25 23:39:10 C 12 31 23.33 +03 10 33.5 c A24
2011-03-25 23:54:41 C 12 31 17.98 +03 11 35.8 c A24
2011-03-26 00:00:06 C 12 31 16.09 +03 11 57.4 c A24
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)