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
2023-03-18 20:20:35 C 10 24 51.85 +02 04 41.0 X G02
2023-03-18 21:49:25 C 10 24 29.57 +02 08 38.3 X L99
2023-03-18 21:52:01 C 10 24 28.98 +02 08 43.8 X L99
2023-03-18 21:54:37 C 10 24 28.26 +02 08 50.4 X L99
2023-03-18 21:57:13 C 10 24 27.62 +02 08 57.5 X L99
2023-03-18 21:59:49 C 10 24 26.98 +02 09 05.3 X L99
2023-03-19 00:30:33 C 10 23 52.356 +02 16 26.54 V W68
2023-03-19 00:35:06 C 10 23 51.240 +02 16 38.64 V W68
2023-03-19 00:40:56 C 10 23 49.786 +02 16 54.12 V W68
2023-03-19 00:51:20 C 10 23 47.232 +02 17 21.77 V W68
2023-03-19 03:45:53 C 10 23 05.161 +02 24 32.51 V 703
2023-03-19 03:53:58 C 10 23 03.178 +02 24 53.86 V 703
2023-03-19 04:02:04 C 10 23 01.183 +02 25 15.49 V 703
2023-03-19 04:10:09 C 10 22 59.156 +02 25 36.95 V 703
2023-03-21 08:12:00 C 10 10 56.208 +04 39 21.17 U F51
2023-03-21 08:28:04 C 10 10 52.490 +04 40 01.02 U F51
2023-03-21 08:44:11 C 10 10 48.779 +04 40 41.02 U F51
2023-03-21 09:00:15 C 10 10 45.063 +04 41 20.88 U F51
2023-03-21 21:06:49 C 10 08 04.846 +05 11 33.90 V M22
2023-03-21 21:11:22 C 10 08 03.814 +05 11 44.88 V M22
2023-03-21 21:19:50 C 10 08 01.894 +05 12 05.65 V M22
2023-03-21 21:35:28 C 10 07 58.361 +05 12 43.52 V M22
2023-03-23 02:48:55 C 10 01 44.762 +06 22 20.32 V W68
2023-03-23 02:56:50 C 10 01 43.046 +06 22 38.64 V W68
2023-03-23 03:47:38 C 10 01 32.112 +06 24 36.83 V W68
2023-03-23 04:02:53 C 10 01 28.838 +06 25 12.14 V W68
2023-03-23 22:31:41 C 09 57 42.22 +07 06 55.3 X L63
2023-03-23 22:45:38 C 09 57 39.33 +07 07 26.6 X L63
2023-03-23 22:59:37 C 09 57 36.42 +07 07 57.8 X L63
2023-03-25 08:37:16 C 09 51 03.286 +08 21 44.96 V T05
2023-03-25 08:41:59 C 09 51 02.342 +08 21 55.01 V T05
2023-03-25 08:51:17 C 09 51 00.530 +08 22 14.59 V T05
2023-03-25 09:08:03 C 09 50 57.228 +08 22 50.12 V T05
2023-03-26 02:39:30 C 09 47 42.192 +08 59 50.06 V W68
2023-03-26 02:44:47 C 09 47 41.189 +09 00 00.90 V W68
2023-03-26 03:35:04 C 09 47 31.663 +09 01 43.97 V W68
2023-03-26 04:15:52 C 09 47 23.969 +09 03 07.27 V W68
2023-03-26 05:06:09 C 09 47 15.569 +09 04 21.50 V 703
2023-03-26 05:14:20 C 09 47 14.014 +09 04 38.24 V 703
2023-03-26 05:22:33 C 09 47 12.455 +09 04 55.13 V 703
2023-03-26 05:30:44 C 09 47 10.914 +09 05 11.76 V 703
2023-03-26 05:56:36 C 09 47 07.362 +09 06 09.73 U F52
2023-03-26 06:13:06 C 09 47 04.258 +09 06 43.52 U F52
2023-03-26 06:29:40 C 09 47 01.140 +09 07 17.40 U F52
2023-03-26 06:46:22 C 09 46 57.998 +09 07 51.49 U F52
2023-03-27 02:29:13 C 09 43 27.029 +09 47 42.54 V W68
2023-03-27 02:33:48 C 09 43 26.213 +09 47 51.54 V W68
2023-03-27 02:43:02 C 09 43 24.528 +09 48 09.65 V W68
2023-03-27 03:33:46 C 09 43 15.358 +09 49 49.04 V W68
2023-03-27 13:58:01 C 09 41 28.31 +10 09 31.8 V D29
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)