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
2023-03-15 22:23:58 C 10 42 28.296 -01 07 59.95 V 160
2023-03-15 22:26:39 C 10 42 27.619 -01 07 51.24 V 160
2023-03-15 22:29:19 C 10 42 26.837 -01 07 45.91 V 160
2023-03-16 06:19:20 C 10 40 25.16 -00 45 41.6 q U55
2023-03-16 06:29:01 C 10 40 22.60 -00 45 15.6 q U55
2023-03-16 06:38:56 C 10 40 20.00 -00 44 46.7 q U55
2023-03-16 08:21:51 C 10 39 53.652 -00 39 45.14 U F52
2023-03-16 08:38:20 C 10 39 49.255 -00 38 58.84 U F52
2023-03-16 09:11:21 C 10 39 40.438 -00 37 26.19 U F52
2023-03-16 19:34:47 C 10 37 00.84 -00 08 34.9 X G02
2023-03-16 19:43:43 C 10 36 58.52 -00 08 10.0 X G02
2023-03-16 19:52:23 C 10 36 56.27 -00 07 46.0 X G02
2023-03-16 20:55:25 C 10 36 39.69 -00 04 50.0 M32
2023-03-16 20:55:55 C 10 36 39.54 -00 04 48.9 M32
2023-03-16 20:56:17 C 10 36 39.47 -00 04 48.1 M32
2023-03-16 20:57:49 C 10 36 39.08 -00 04 43.6 M32
2023-03-16 20:58:11 C 10 36 38.96 -00 04 42.1 M32
2023-03-16 20:58:34 C 10 36 38.88 -00 04 41.4 M32
2023-03-16 20:58:57 C 10 36 38.79 -00 04 40.3 M32
2023-03-16 20:59:20 C 10 36 38.68 -00 04 39.7 M32
2023-03-16 20:59:43 C 10 36 38.59 -00 04 38.0 M32
2023-03-16 21:00:05 C 10 36 38.49 -00 04 37.3 M32
2023-03-16 21:00:28 C 10 36 38.37 -00 04 36.1 M32
2023-03-16 21:00:51 C 10 36 38.30 -00 04 35.2 M32
2023-03-16 21:01:14 C 10 36 38.15 -00 04 33.9 M32
2023-03-16 21:01:37 C 10 36 38.07 -00 04 32.7 M32
2023-03-16 21:01:59 C 10 36 37.94 -00 04 31.5 M32
2023-03-16 21:05:02 C 10 36 37.21 -00 04 23.7 M32
2023-03-16 21:05:25 C 10 36 37.12 -00 04 22.9 M32
2023-03-16 21:05:48 C 10 36 36.99 -00 04 21.2 M32
2023-03-16 21:06:10 C 10 36 36.85 -00 04 20.0 M32
2023-03-16 21:06:33 C 10 36 36.80 -00 04 19.2 M32
2023-03-17 09:35:41 C 10 33 26.527 +00 30 29.88 V T05
2023-03-17 09:40:35 C 10 33 25.236 +00 30 43.45 V T05
2023-03-17 09:48:43 C 10 33 23.131 +00 31 05.81 V T05
2023-03-17 10:39:25 C 10 33 09.960 +00 33 25.45 V T05
2023-03-17 16:29:30 C 10 31 43.45 +00 49 12.0 q 168
2023-03-17 17:42:31 C 10 31 24.90 +00 52 32.8 q 168
2023-03-17 18:58:31 C 10 31 05.53 +00 56 00.4 q 168
2023-03-17 21:25:24 C 10 30 28.992 +01 03 26.39 V M22
2023-03-17 21:29:56 C 10 30 27.818 +01 03 38.66 V M22
2023-03-17 21:37:45 C 10 30 25.826 +01 04 00.01 V M22
2023-03-17 22:26:27 C 10 30 13.334 +01 06 12.92 V M22
2023-03-18 12:20:51 C 10 26 49.452 +01 43 49.69 V P07
2023-03-18 13:18:56 C 10 26 34.855 +01 46 26.33 V P07
2023-03-18 13:22:10 C 10 26 34.049 +01 46 34.75 V P07
2023-03-18 15:04:21 C 10 26 08.297 +01 51 09.50 V P07
2023-03-18 16:12:26 C 10 25 51.132 +01 54 12.20 V P07
2023-03-18 20:09:58 C 10 24 54.53 +02 04 12.5 X G02
2023-03-18 20:15:16 C 10 24 53.19 +02 04 26.5 X G02
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)