2021 SR4

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.1915614000
Semi-major axis (a)1.3879107000 AU
Inclination (i)22.38026000°
Long. of Asc. Node (Ω)1.09101000°
Arg. of Perihelion (ω)29.06402000°
Mean Anomaly (M)176.70817000°
Mean Motion (n)0.6027840800°/day
Perihelion dist (q)1.12204060 AU
Aphelion dist (Q)1.65378080 AU
Orbital Period1.63509230 yr
Physical Parameters
H (abs. magnitude)24.39
G (slope)0.15
Orbit Solution
SourceMPC
Solution Date
RMS Residual0.480″
Uncertainty8
Orbit TypeAmor
MOID0.138217 AU
Observations Used10
Oppositions1
Arc Total
First Observation Used
Last Observation Used2021-10-01
Observations (12)
Date Type RA Dec Mag Band Observatory
2021-09-29 06:48:45 C 00 03 27.432 +19 47 09.67 U F51
2021-09-29 07:05:25 C 00 03 22.889 +19 48 45.77 U F51
2021-09-29 07:22:00 C 00 03 18.360 +19 50 21.57 U F51
2021-09-29 07:38:32 C 00 03 13.812 +19 51 57.02 U F51
2021-09-30 02:46:00 C 23 58 13.13 +21 40 05.7 u H21
2021-09-30 03:01:46 C 23 58 08.79 +21 41 34.6 u H21
2021-09-30 12:13:33 C 23 55 38.779 +22 33 11.91 U F51
2021-09-30 12:30:23 C 23 55 34.144 +22 34 43.43 U F51
2021-09-30 12:47:08 C 23 55 29.480 +22 36 15.76 U F51
2021-10-01 07:30:01 C 23 50 33.82 +24 18 34.4 V 654
2021-10-01 08:21:34 C 23 50 19.26 +24 23 11.6 V 654
2021-10-01 09:35:28 C 23 49 58.52 +24 29 46.5 V 654