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
2025-04-03 08:57:26 C 14 17 32.705 +24 42 44.64 V T05
2025-04-03 09:04:06 C 14 17 30.187 +24 44 10.39 V T05
2025-04-03 09:10:08 C 14 17 27.905 +24 45 27.97 V T05
2025-04-03 16:43:26 C 14 14 34.79 +26 23 26.8 q Q14
2025-04-03 16:45:08 C 14 14 34.10 +26 23 49.3 q Q14
2025-04-03 21:10:48 B 14 12 54.794 +27 22 36.80 V 160
2025-04-03 21:14:18 B 14 12 53.347 +27 23 24.36 V 160
2025-04-03 21:17:47 B 14 12 51.898 +27 24 11.77 V 160
2025-04-04 00:51:39 C 14 11 19.60 +28 12 49.6 V M32
2025-04-04 00:52:31 C 14 11 19.22 +28 13 01.5 V M32
2025-04-04 00:53:23 C 14 11 18.85 +28 13 13.4 V M32
2025-04-04 00:54:15 C 14 11 18.47 +28 13 25.2 V M32
2025-04-04 00:55:07 C 14 11 18.10 +28 13 37.1 V M32
2025-04-04 06:48:37 V 14 08 52.18 +29 35 31.3 V 270
2025-04-04 06:48:37 v 1 237.34895 +47.62035 270
2025-04-04 06:54:42 V 14 08 49.19 +29 36 59.5 V 270
2025-04-04 06:54:42 v 1 237.34895 +47.62035 270
2025-04-04 07:01:19 V 14 08 46.19 +29 38 32.9 V 270
2025-04-04 07:01:19 v 1 237.34895 +47.62035 270
2025-04-04 07:08:04 V 14 08 43.10 +29 40 09.0 V 270
2025-04-04 07:08:04 v 1 237.34895 +47.62035 270
2025-04-04 11:15:16 V 14 06 55.19 +30 38 45.5 V 270
2025-04-04 11:15:16 v 1 134.35900 +35.08986 270
2025-04-04 11:21:45 V 14 06 52.27 +30 40 18.9 V 270
2025-04-04 11:21:45 v 1 134.35900 +35.08986 270
2025-04-04 11:28:30 V 14 06 49.18 +30 41 57.5 V 270
2025-04-04 11:28:30 v 1 134.35900 +35.08986 270
2025-04-04 11:34:43 V 14 06 46.26 +30 43 26.8 V 270
2025-04-04 11:34:43 v 1 134.35900 +35.08986 270
2025-04-04 13:30:11 V 14 05 50.40 +31 11 33.7 V 270
2025-04-04 13:30:11 v 1 140.17439 +36.06238 270
2025-04-04 13:36:41 V 14 05 47.26 +31 13 07.4 V 270
2025-04-04 13:36:41 v 1 140.17439 +36.06238 270
2025-04-04 13:43:14 V 14 05 44.02 +31 14 44.2 V 270
2025-04-04 13:43:14 v 1 140.17439 +36.06238 270
2025-04-04 13:49:47 V 14 05 40.72 +31 16 20.7 V 270
2025-04-04 13:49:47 v 1 140.17439 +36.06238 270
2025-04-04 17:06:10 V 14 04 01.98 +32 04 13.9 V 270
2025-04-04 17:06:10 v 1 139.13620 +35.33846 270
2025-04-04 17:21:15 V 14 03 54.23 +32 07 54.2 V 270
2025-04-04 17:21:15 v 1 139.13620 +35.33846 270
2025-04-04 17:38:37 V 14 03 45.33 +32 12 08.3 V 270
2025-04-04 17:38:37 v 1 139.13620 +35.33846 270
2025-04-04 17:49:17 V 14 03 39.89 +32 14 43.4 V 270
2025-04-04 17:49:17 v 1 139.13620 +35.33846 270
2025-04-04 19:45:17 C 14 02 50.378 +32 42 34.61 V G33
2025-04-04 19:48:39 C 14 02 48.687 +32 43 25.25 V G33
2025-04-04 19:50:20 C 14 02 47.841 +32 43 50.61 V G33
2025-04-04 20:42:38 C 14 02 19.654 +32 57 00.36 W C36
2025-04-04 20:42:59 C 14 02 19.526 +32 57 06.55 W C36
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)