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
2025-03-13 00:21:33 C 15 03 04.819 -13 35 48.88 V M22
2025-03-13 00:26:06 C 15 03 04.795 -13 35 43.66 V M22
2025-03-13 00:33:56 C 15 03 04.766 -13 35 34.01 V M22
2025-03-15 00:18:51 C 15 02 59.419 -12 32 12.41 V M22
2025-03-15 00:23:25 C 15 02 59.352 -12 32 05.86 V M22
2025-03-15 00:31:15 C 15 02 59.263 -12 31 54.66 V M22
2025-03-15 00:43:00 C 15 02 59.122 -12 31 37.92 V M22
2025-03-21 05:12:17 C 15 00 08.107 -07 44 12.23 V W68
2025-03-21 05:14:53 C 15 00 07.985 -07 44 05.60 V W68
2025-03-21 05:18:53 C 15 00 07.824 -07 43 55.31 V W68
2025-03-21 05:26:10 C 15 00 07.488 -07 43 36.77 V W68
2025-03-21 05:26:49 C 15 00 07.488 -07 43 35.15 V W68
2025-03-22 12:30:06 C 14 58 50.186 -06 18 55.26 V T05
2025-03-22 12:34:41 C 14 58 49.922 -06 18 41.90 V T05
2025-03-22 12:39:14 C 14 58 49.656 -06 18 28.51 V T05
2025-03-22 12:47:03 C 14 58 49.214 -06 18 05.54 V T05
2025-03-23 21:17:43 C 14 57 09.609 -04 35 22.04 W M01
2025-03-23 21:20:13 C 14 57 09.452 -04 35 13.66 W M01
2025-03-23 21:22:43 C 14 57 09.294 -04 35 05.27 W M01
2025-03-24 13:20:13 C 14 56 08.508 -03 38 36.60 V T08
2025-03-24 13:25:34 C 14 56 08.095 -03 38 16.91 V T08
2025-03-24 13:34:45 C 14 56 07.380 -03 37 43.21 V T08
2025-03-24 13:49:23 C 14 56 06.238 -03 36 49.43 V T08
2025-03-25 06:54:28 C 14 54 56.640 -02 30 43.63 V W68
2025-03-25 06:57:03 C 14 54 56.422 -02 30 33.19 V W68
2025-03-25 07:02:17 C 14 54 55.978 -02 30 12.42 V W68
2025-03-25 07:10:07 C 14 54 55.313 -02 29 41.10 V W68
2025-03-25 22:08:43 C 14 53 47.75 -01 28 42.7 V M32
2025-03-25 22:10:43 C 14 53 47.57 -01 28 33.7 V M32
2025-03-25 22:13:31 C 14 53 47.34 -01 28 21.9 V M32
2025-03-25 22:16:44 C 14 53 47.07 -01 28 08.2 V M32
2025-03-25 22:20:20 C 14 53 46.73 -01 27 52.8 V M32
2025-03-26 23:39:02 B 14 51 33.257 +00 28 04.94 W Z80
2025-03-26 23:39:14 C 14 51 33.082 +00 28 05.27 Z C23
2025-03-26 23:41:15 C 14 51 32.633 +00 29 28.00 V M22
2025-03-26 23:41:56 B 14 51 32.930 +00 28 18.62 W Z80
2025-03-26 23:45:04 B 14 51 32.587 +00 28 34.32 W Z80
2025-03-26 23:49:03 C 14 51 32.066 +00 28 53.54 Z C23
2025-03-26 23:57:42 C 14 51 30.852 +00 30 48.38 V M22
2025-03-27 00:02:16 C 14 51 30.353 +00 31 10.74 V M22
2025-03-27 00:04:18 C 14 51 30.466 +00 30 08.24 Z C23
2025-03-27 22:53:49 C 14 49 09.271 +02 28 40.30 Z C23
2025-03-27 22:56:08 C 14 49 06.95 +02 28 49.5 q 168
2025-03-27 23:00:44 C 14 49 08.412 +02 29 18.46 Z C23
2025-03-27 23:08:12 C 14 49 07.634 +02 29 59.42 Z C23
2025-03-27 23:10:33 C 14 49 05.19 +02 30 09.1 q 168
2025-03-27 23:26:35 C 14 49 03.25 +02 31 37.4 q 168
2025-03-27 23:40:37 C 14 49 01.55 +02 32 55.2 q 168
2025-03-27 23:52:39 C 14 49 00.08 +02 34 01.2 q 168
2025-03-28 09:18:14 C 14 47 55.662 +03 27 52.63 V 703
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)