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
2021-02-28 20:55:56 C 06 10 44.98 -10 21 34.1 V G17
2021-03-02 07:54:56 C 06 17 47.39 -07 36 22.3 V T08
2021-03-02 07:58:54 C 06 17 48.12 -07 36 04.6 V T08
2021-03-02 08:24:47 C 06 17 52.77 -07 34 09.8 V T08
2021-03-03 07:20:21 C 06 22 04.32 -05 56 30.2 V T08
2021-03-03 07:24:20 C 06 22 04.99 -05 56 13.9 V T08
2021-03-03 07:49:01 C 06 22 09.08 -05 54 32.6 V T08
2021-03-06 18:33:27 C 06 35 06.60 -00 59 08.9 V G17
2021-03-06 18:35:31 C 06 35 06.88 -00 59 02.1 V G17
2021-03-06 18:37:35 C 06 35 07.15 -00 58 55.3 V G17
2021-03-07 07:47:53 C 06 36 54.96 -00 18 37.1 V T08
2021-03-07 07:53:13 C 06 36 55.64 -00 18 21.2 V T08
2021-03-07 08:03:10 C 06 36 56.92 -00 17 51.5 V T08
2021-03-07 08:19:49 C 06 36 59.04 -00 17 02.0 V T08
2021-03-07 18:59:44 C 06 38 25.83 +00 13 59.8 V 130
2021-03-07 19:02:29 C 06 38 26.14 +00 14 07.4 V 130
2021-03-07 19:05:14 C 06 38 26.49 +00 14 15.8 V 130
2021-03-07 19:07:58 C 06 38 26.85 +00 14 23.5 V 130
2021-03-09 13:13:12 S 06 43 45.660 +02 08 17.56 L C51
2021-03-09 15:37:48 C 06 44 03.34 +02 14 12.2 q C97
2021-03-09 15:38:31 C 06 44 03.44 +02 14 14.1 q C97
2021-03-09 15:39:13 C 06 44 03.50 +02 14 15.9 q C97
2021-03-09 15:39:55 C 06 44 03.59 +02 14 17.4 q C97
2021-03-09 15:41:18 C 06 44 03.73 +02 14 20.9 q C97
2021-03-09 15:42:01 C 06 44 03.94 +02 14 22.4 q C97
2021-03-09 19:29:50 S 06 44 30.931 +02 24 00.65 L C51
2021-03-09 22:38:09 S 06 44 53.345 +02 31 45.23 L C51
2021-03-10 04:54:03 S 06 45 37.690 +02 47 02.40 L C51
2021-03-10 08:03:06 S 06 45 59.834 +02 54 34.49 L C51
2021-03-10 11:10:41 S 06 46 21.641 +03 02 02.11 L C51
2021-03-10 17:28:03 S 06 47 05.146 +03 16 46.31 L C51
2021-03-10 19:02:07 S 06 47 15.919 +03 20 24.11 L C51
2021-03-10 19:02:18 S 06 47 15.924 +03 20 24.18 L C51
2021-03-10 20:36:22 S 06 47 26.642 +03 24 01.73 L C51
2021-03-10 22:10:26 S 06 47 37.394 +03 27 38.09 L C51
2021-03-10 23:44:41 S 06 47 48.084 +03 31 13.37 L C51
2021-03-11 01:18:45 S 06 47 58.786 +03 34 47.71 L C51
2021-03-11 02:52:16 S 06 48 09.274 +03 38 20.83 L C51
2021-03-11 04:27:05 S 06 48 19.949 +03 41 53.63 L C51
2021-03-11 06:01:20 S 06 48 30.530 +03 45 25.06 L C51
2021-03-11 07:35:24 S 06 48 41.078 +03 48 55.26 L C51
2021-03-11 10:43:43 S 06 49 02.057 +03 55 53.54 L C51
2021-03-11 17:00:20 S 06 49 43.733 +04 09 38.45 L C51
2021-03-11 23:16:58 S 06 50 24.979 +04 23 08.66 L C51
2021-03-12 02:24:34 S 06 50 45.324 +04 29 47.83 L C51
2021-03-20 03:04:08 C 07 09 10.07 +09 46 39.7 V G96
2021-03-20 03:10:58 C 07 09 10.62 +09 46 48.3 V G96
2021-03-20 03:17:47 C 07 09 11.17 +09 46 57.1 V G96
2021-03-20 03:24:37 C 07 09 11.72 +09 47 05.5 V G96
2021-03-20 07:23:17 C 07 09 31.84 +09 52 11.4 V T08
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)