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
2025-04-17 21:51:46 C 05 28 58.43 +60 19 10.2 V M32
2025-04-17 21:52:01 C 05 28 58.16 +60 19 08.6 V M32
2025-04-17 21:56:32 C 05 28 55.27 +60 18 44.0 V M32
2025-04-17 21:56:47 C 05 28 55.18 +60 18 41.2 V M32
2025-04-17 22:02:06 C 05 28 51.50 +60 18 12.0 V M32
2025-04-17 22:02:21 C 05 28 51.49 +60 18 10.4 V M32
2025-04-17 22:21:29 B 05 28 39.74 +60 16 20.9 X L99
2025-04-17 22:27:16 B 05 28 35.78 +60 15 49.2 X L99
2025-04-17 22:32:29 B 05 28 32.50 +60 15 20.9 X L99
2025-04-18 02:55:32 C 05 25 39.994 +59 52 50.66 V 703
2025-04-18 02:58:56 C 05 25 37.967 +59 52 31.22 V 703
2025-04-18 03:05:45 C 05 25 33.434 +59 51 54.07 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)