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
2025-04-04 20:43:15 C 14 02 19.462 +32 57 10.33 W C36
2025-04-04 20:43:22 C 14 02 19.337 +32 57 12.49 W C36
2025-04-04 20:43:53 C 14 02 19.070 +32 57 19.33 W C36
2025-04-04 20:44:00 C 14 02 18.962 +32 57 21.74 W C36
2025-04-04 20:44:37 C 14 02 18.720 +32 57 31.50 W C36
2025-04-04 20:45:15 C 14 02 18.274 +32 57 40.68 W C36
2025-04-04 21:22:54 C 14 02 00.571 +33 07 00.48 Z C23
2025-04-04 21:24:22 C 14 01 59.794 +33 07 22.73 Z C23
2025-04-04 21:25:36 C 14 01 59.174 +33 07 41.23 Z C23
2025-04-04 21:52:30 C 14 01 45.132 +33 14 25.87 Z C23
2025-04-04 21:53:43 C 14 01 44.506 +33 14 44.38 Z C23
2025-04-05 10:33:18 C 13 54 49.882 +36 29 23.64 V T05
2025-04-05 10:36:33 C 13 54 47.899 +36 30 14.54 V T05
2025-04-05 10:41:07 C 13 54 45.115 +36 31 25.32 V T05
2025-04-05 10:49:39 C 13 54 39.826 +36 33 39.74 V T05
2025-04-05 22:04:42 C 13 47 44.206 +39 31 06.92 Z C23
2025-04-05 22:06:55 C 13 47 42.670 +39 31 42.67 Z C23
2025-04-05 22:18:21 C 13 47 34.920 +39 34 48.04 Z C23
2025-04-06 04:13:57 V 13 43 35.32 +41 10 55.7 V 270
2025-04-06 04:13:57 v 1 255.21371 +38.90650 270
2025-04-06 04:20:34 V 13 43 30.56 +41 12 44.5 V 270
2025-04-06 04:20:34 v 1 255.21371 +38.90650 270
2025-04-06 04:27:03 V 13 43 25.87 +41 14 31.4 V 270
2025-04-06 04:27:03 v 1 255.21371 +38.90650 270
2025-04-06 04:33:36 V 13 43 21.09 +41 16 19.3 V 270
2025-04-06 04:33:36 v 1 255.21371 +38.90650 270
2025-04-06 12:41:51 C 13 37 10.003 +43 30 34.42 V T05
2025-04-06 12:51:29 C 13 37 02.160 +43 33 12.06 V T05
2025-04-06 12:52:11 V 13 37 11.27 +43 32 49.0 V 270
2025-04-06 12:52:11 v 1 134.35900 +35.08986 270
2025-04-06 12:58:52 V 13 37 05.86 +43 34 40.2 V 270
2025-04-06 12:58:52 v 1 134.35900 +35.08986 270
2025-04-06 13:05:29 V 13 37 00.50 +43 36 31.3 V 270
2025-04-06 13:05:29 v 1 134.35900 +35.08986 270
2025-04-06 13:11:42 V 13 36 55.48 +43 38 15.2 V 270
2025-04-06 13:11:42 v 1 134.35900 +35.08986 270
2025-04-06 14:15:24 C 13 35 53.602 +43 56 02.54 V T05
2025-04-06 18:39:40 B 13 32 31.046 +45 09 07.99 Z M69
2025-04-06 18:40:39 C 13 32 31.853 +45 08 19.39 V L54
2025-04-06 18:44:09 B 13 32 27.166 +45 10 22.76 Z M69
2025-04-06 18:48:03 B 13 32 23.794 +45 11 28.03 Z M69
2025-04-06 18:54:45 C 13 32 19.476 +45 12 22.43 V L54
2025-04-06 19:07:47 C 13 32 08.549 +45 16 00.59 V L54
2025-04-06 20:02:29 V 13 31 22.83 +45 30 58.6 V 270
2025-04-06 20:02:29 v 1 002.34691 +47.05769 270
2025-04-06 20:03:00 C 13 31 20.74 +45 31 21.3 V M32
2025-04-06 20:03:43 C 13 31 20.13 +45 31 33.2 V M32
2025-04-06 20:04:27 C 13 31 19.48 +45 31 45.6 V M32
2025-04-06 20:05:11 C 13 31 18.85 +45 31 57.8 V M32
2025-04-06 20:05:55 C 13 31 18.21 +45 32 10.2 V M32
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)