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
2018-04-03 21:48:09 C 12 08 55.14 +22 37 45.9 U J69
2018-04-03 21:56:15 C 12 08 50.25 +22 38 45.0 U J69
2018-04-03 22:13:03 C 12 08 40.08 +22 40 46.7 U Z80
2018-04-03 22:15:09 C 12 08 38.80 +22 41 01.9 U Z80
2018-04-03 22:17:14 C 12 08 37.57 +22 41 16.9 U Z80
2018-04-03 22:19:19 C 12 08 36.31 +22 41 32.3 U Z80
2018-04-03 22:21:25 C 12 08 35.05 +22 41 47.2 U Z80
2018-04-03 22:23:30 C 12 08 33.77 +22 42 02.7 U Z80
2018-04-03 22:25:36 C 12 08 32.53 +22 42 17.8 U Z80
2018-04-03 22:27:41 C 12 08 31.26 +22 42 32.8 U Z80
2018-04-03 22:29:47 C 12 08 29.96 +22 42 48.4 U Z80
2018-04-03 22:31:52 C 12 08 28.71 +22 43 03.5 U Z80
2018-04-05 06:13:45 C 11 48 45.03 +26 32 40.3 u 850
2018-04-05 06:33:55 C 11 48 31.65 +26 35 01.8 u 850
2018-04-05 07:09:52 C 11 48 07.59 +26 39 19.0 u 850
2018-04-05 07:37:24 C 11 47 49.22 +26 42 34.1 u 850
2018-04-05 10:52:57 C 11 45 41.95 +27 06 13.9 U T08
2018-04-05 10:58:59 C 11 45 37.85 +27 06 56.6 U T08
2018-04-05 11:09:53 C 11 45 30.46 +27 08 13.7 U T08
2018-04-05 11:16:21 C 11 45 26.08 +27 08 59.1 U T08
2018-04-05 11:26:07 C 11 45 19.45 +27 10 08.3 U T08
2018-04-05 11:32:26 C 11 45 15.16 +27 10 52.9 U T08
2018-04-05 11:39:28 C 11 45 10.41 +27 11 42.2 U T08
2018-04-05 11:43:01 C 11 45 08.01 +27 12 07.4 U T08
2018-04-05 11:51:50 C 11 45 02.03 +27 13 09.3 U T08
2018-04-05 17:50:42 C 11 41 07.42 +27 55 38.4 q C97
2018-04-05 17:52:17 C 11 41 06.47 +27 55 47.0 q C97
2018-04-05 17:53:52 C 11 41 05.57 +27 55 57.3 q C97
2018-04-05 17:55:27 C 11 41 04.21 +27 56 10.6 q C97
2018-04-05 17:57:03 C 11 41 03.20 +27 56 21.0 q C97
2018-04-05 17:58:39 C 11 41 02.07 +27 56 32.3 q C97
2018-04-05 20:24:10 C 11 39 24.48 +28 13 12.9 U 108
2018-04-05 20:26:34 C 11 39 22.84 +28 13 29.9 U 108
2018-04-05 20:28:59 C 11 39 21.18 +28 13 47.1 U 108
2018-04-05 20:30:36 C 11 39 20.04 +28 13 59.0 U 108
2018-04-05 22:15:50 C 11 38 07.81 +28 26 08.9 U Z52
2018-04-05 22:31:48 C 11 37 56.75 +28 28 01.0 U Z52
2018-04-05 22:48:28 C 11 37 45.18 +28 29 58.0 U Z52
2018-04-05 22:56:52 C 11 37 39.35 +28 30 58.9 U Z80
2018-04-05 22:58:57 C 11 37 37.91 +28 31 13.2 U Z80
2018-04-05 23:01:02 C 11 37 36.45 +28 31 27.8 U Z80
2018-04-05 23:03:07 C 11 37 34.99 +28 31 42.6 U Z80
2018-04-05 23:05:12 C 11 37 33.54 +28 31 56.9 U Z80
2018-04-05 23:07:17 C 11 37 32.10 +28 32 11.5 U Z80
2018-04-05 23:09:23 C 11 37 30.65 +28 32 26.4 U Z80
2018-04-05 23:11:29 C 11 37 29.18 +28 32 41.0 U Z80
2018-04-05 23:13:34 C 11 37 27.73 +28 32 55.4 U Z80
2018-04-05 23:15:06 C 11 37 26.70 +28 33 04.4 U Z52
2018-04-05 23:15:40 C 11 37 26.30 +28 33 10.3 U Z80
2018-04-05 23:37:15 C 11 37 11.32 +28 35 39.3 U Z52
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)