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
1971-03-26 07:20:29 A 12 37 00.35 +03 24 58.4 18.0 K 675
1971-03-26 07:26:30 A 12 36 58.39 +03 25 22.0 K 675
1971-03-26 07:32:30 A 12 36 56.33 +03 25 48.3 K 675
1971-03-26 08:16:29 A 12 36 40.48 +03 28 53.6 18.0 K 675
1971-03-26 08:22:30 A 12 36 38.52 +03 29 17.9 K 675
1971-03-26 08:28:29 A 12 36 36.46 +03 29 42.8 K 675
1999-03-24 09:08:11 C 17 25 09.92 -08 09 12.7 18.5 a 704
1999-03-24 09:22:55 C 17 25 14.76 -08 08 34.5 18.5 a 704
1999-03-24 09:37:54 C 17 25 19.63 -08 07 58.7 18.6 a 704
1999-03-24 09:52:37 C 17 25 24.40 -08 07 19.5 18.6 a 704
1999-03-24 10:07:14 C 17 25 29.05 -08 06 43.7 18.7 a 704
1999-03-25 03:01:56 C 17 31 13.10 -07 22 13.5 557
1999-03-25 03:03:17 C 17 31 13.58 -07 22 10.1 557
1999-03-25 03:04:40 C 17 31 14.04 -07 22 06.1 557
1999-03-25 03:10:08 C 17 31 15.92 -07 21 51.3 557
1999-03-25 03:11:19 C 17 31 16.31 -07 21 48.3 557
1999-03-25 03:14:48 C 17 31 17.52 -07 21 38.5 d 046
1999-03-25 03:15:54 C 17 31 17.92 -07 21 35.4 d 046
1999-03-25 03:17:55 C 17 31 18.60 -07 21 29.0 d 046
1999-03-25 03:21:55 C 17 31 19.88 -07 21 18.7 d 046
1999-03-25 03:23:41 C 17 31 20.57 -07 21 14.0 d 046
1999-03-25 03:26:26 C 17 31 21.48 -07 21 06.8 d 046
1999-03-25 16:08:15 C 17 35 55.20 -06 44 32.3 422
1999-03-25 16:09:19 C 17 35 55.59 -06 44 29.3 422
1999-03-25 16:11:39 C 17 35 56.42 -06 44 22.4 422
1999-03-25 16:12:26 C 17 35 56.71 -06 44 20.3 422
1999-03-25 16:13:22 C 17 35 57.04 -06 44 17.7 422
1999-03-26 03:33:06 C 17 40 09.18 -06 11 37.1 d 046
1999-03-26 03:34:23 C 17 40 09.62 -06 11 33.8 d 046
1999-03-26 03:36:51 C 17 40 10.56 -06 11 26.0 d 046
1999-03-26 03:39:52 C 17 40 11.65 -06 11 17.6 d 046
1999-03-26 03:41:21 C 17 40 12.19 -06 11 12.4 d 046
1999-03-26 03:43:12 C 17 40 12.93 -06 11 07.1 d 046
1999-03-26 10:48:41 C 17 42 57.38 -05 49 09.7 17.4 a 704
1999-03-26 10:48:45 C 17 42 57.35 -05 49 09.1 17.8 a 704
1999-03-26 11:01:40 C 17 43 02.36 -05 48 29.0 17.7 a 704
1999-03-26 11:01:45 C 17 43 02.31 -05 48 28.8 17.5 a 704
1999-03-26 11:15:59 C 17 43 07.76 -05 47 43.5 17.5 a 704
1999-03-26 11:16:03 C 17 43 07.74 -05 47 44.3 17.4 a 704
1999-03-26 11:30:22 C 17 43 13.26 -05 46 58.5 17.7 a 704
1999-03-26 11:30:27 C 17 43 13.23 -05 46 58.8 17.5 a 704
1999-03-26 11:44:51 C 17 43 18.75 -05 46 13.5 17.7 a 704
1999-03-26 11:44:55 C 17 43 18.84 -05 46 11.8 17.9 a 704
1999-03-26 17:09:42 C 17 45 28.01 -05 28 16.6 422
1999-03-26 17:12:59 C 17 45 29.25 -05 28 06.3 422
1999-03-26 17:15:01 C 17 45 30.04 -05 27 59.5 422
1999-03-26 17:16:03 C 17 45 30.42 -05 27 56.2 422
1999-03-26 17:18:10 C 17 45 31.26 -05 27 49.2 422
1999-03-26 17:19:47 C 17 45 31.89 -05 27 44.1 422
1999-03-26 20:21:46 C 17 46 44.34 -05 18 45.7 327
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)