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
2021-03-20 07:37:28 C 07 09 32.98 +09 52 29.4 V T08
2021-03-20 07:57:54 C 07 09 34.62 +09 52 54.7 V T08
2021-03-20 08:06:38 C 07 09 35.34 +09 53 05.6 V T08
2021-04-03 03:53:05 C 07 35 21.45 +14 43 49.1 V 703
2021-04-03 04:00:40 C 07 35 22.02 +14 43 54.3 V 703
2021-04-03 04:15:49 C 07 35 22.98 +14 44 01.2 V 703
2021-04-06 04:20:34 C 07 40 34.40 +15 23 43.3 V 703
2021-04-06 04:28:44 C 07 40 34.93 +15 23 47.5 V 703
2021-04-06 04:36:54 C 07 40 35.53 +15 23 50.1 V 703
2021-04-06 04:45:04 C 07 40 36.08 +15 23 55.8 V 703
2021-04-06 06:04:04 C 07 40 42.047 +15 24 39.05 U F51
2021-04-06 06:22:42 C 07 40 43.309 +15 24 48.52 U F51
2021-04-06 06:41:26 C 07 40 44.577 +15 24 57.80 U F51
2021-04-07 03:39:41 C 07 42 14.40 +15 35 18.4 V G96
2021-04-07 03:46:32 C 07 42 14.86 +15 35 21.6 V G96
2021-04-07 03:53:22 C 07 42 15.33 +15 35 24.9 V G96
2021-04-07 04:00:12 C 07 42 15.79 +15 35 28.1 V G96
2021-04-09 03:26:40 C 07 45 38.13 +15 57 20.4 V 703
2021-04-09 03:35:00 C 07 45 38.60 +15 57 22.2 V 703
2021-04-09 03:51:37 C 07 45 39.68 +15 57 27.2 V 703
2021-05-09 12:27:35 C 08 36 39.99 +18 22 45.9 q D29
2021-05-09 12:47:57 C 08 36 41.42 +18 22 46.7 q D29
2021-05-09 13:08:18 C 08 36 42.79 +18 22 47.5 q D29
2021-05-10 04:30:23 C 08 37 47.71 +18 23 16.2 U I41
2021-05-10 04:55:55 C 08 37 49.46 +18 23 16.3 U I41
2021-05-14 04:28:52 C 08 44 33.78 +18 24 32.2 U I41
2021-05-14 05:14:32 C 08 44 36.97 +18 24 31.3 U I41
2022-02-04 15:30:01 C 16 53 33.953 -18 51 15.34 U F52
2022-02-04 15:43:53 C 16 53 36.784 -18 51 15.68 U F52
2022-02-04 15:50:53 C 16 53 38.192 -18 51 15.86 U F52
2023-01-20 01:53:41 C 14 09 46.894 -27 16 37.67 V M22
2023-01-20 02:11:50 C 14 09 46.243 -27 16 36.34 V M22
2023-01-20 02:25:36 C 14 09 45.725 -27 16 36.01 V M22
2023-01-20 02:40:48 C 14 09 45.235 -27 16 34.86 V M22
2023-01-26 07:46:42 C 14 04 07.790 -27 01 09.91 V W68
2023-01-26 07:51:16 C 14 04 07.615 -27 01 09.88 V W68
2023-01-26 08:03:44 C 14 04 06.998 -27 01 08.04 V W68
2023-01-26 08:22:48 C 14 04 06.070 -27 01 05.88 V W68
2023-01-27 01:09:19 C 14 03 20.662 -26 58 45.44 V M22
2023-01-27 01:13:54 C 14 03 20.285 -26 58 43.46 V M22
2023-01-27 01:33:34 C 14 03 19.310 -26 58 41.30 V M22
2023-01-27 01:42:48 C 14 03 18.876 -26 58 39.94 V M22
2023-01-28 01:43:01 C 14 02 09.943 -26 55 04.22 V M22
2023-01-28 02:17:06 C 14 02 08.083 -26 55 00.19 V M22
2023-01-28 02:48:50 C 14 02 06.374 -26 54 55.12 V M22
2023-01-28 02:57:57 C 14 02 05.894 -26 54 53.39 V M22
2023-01-30 08:17:58 C 13 59 17.006 -26 45 35.14 V W68
2023-01-30 08:29:58 C 13 59 16.267 -26 45 32.94 V W68
2023-01-30 08:54:19 C 13 59 14.786 -26 45 28.44 V W68
2023-01-31 01:46:38 C 13 58 16.658 -26 42 05.26 V M22
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)