2021 SD

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.3209331000
Semi-major axis (a)1.3250796000 AU
Inclination (i)13.16264000°
Long. of Asc. Node (Ω)174.23076000°
Arg. of Perihelion (ω)237.58429000°
Mean Anomaly (M)235.88262000°
Mean Motion (n)0.6461615900°/day
Perihelion dist (q)0.89981770 AU
Aphelion dist (Q)1.75034150 AU
Orbital Period1.52532700 yr
Physical Parameters
H (abs. magnitude)26.99
G (slope)0.15
Orbit Solution
SourceMPC
Solution Date
RMS Residual0.540″
Uncertainty7
Orbit TypeApollo
MOID0.005260 AU
Observations Used22
Oppositions1
Arc Total
First Observation Used
Last Observation Used2021-09-17
Observations (22)
Date Type RA Dec Mag Band Observatory
2021-09-16 08:50:23 C 01 33 32.04 +18 33 14.4 V G96
2021-09-16 08:57:49 C 01 33 55.51 +18 29 58.8 V G96
2021-09-16 09:05:15 C 01 34 18.84 +18 26 43.0 V G96
2021-09-16 09:12:41 C 01 34 42.34 +18 23 26.2 V G96
2021-09-16 11:22:58 C 01 41 42.63 +17 23 25.8 V G96
2021-09-16 11:23:14 C 01 41 43.49 +17 23 18.7 V G96
2021-09-16 11:23:29 C 01 41 44.35 +17 23 11.2 V G96
2021-09-16 11:23:45 C 01 41 45.23 +17 23 03.5 V G96
2021-09-16 22:04:33 C 02 22 40.96 +11 28 10.9 X 958
2021-09-16 22:08:58 C 02 22 58.54 +11 25 26.7 X 958
2021-09-16 22:13:24 C 02 23 16.02 +11 22 42.4 X 958
2021-09-16 22:16:50 C 02 23 24.97 +11 19 18.9 V J95
2021-09-16 22:27:27 C 02 24 07.27 +11 12 42.3 V J95
2021-09-16 22:36:37 C 02 24 43.84 +11 06 57.5 V J95
2021-09-16 22:39:48 C 02 24 56.49 +11 04 58.8 V J95
2021-09-17 01:37:11 C 02 36 49.85 +09 11 16.3 V I93
2021-09-17 01:40:55 C 02 37 04.94 +09 08 45.6 V I93
2021-09-17 01:44:46 C 02 37 20.44 +09 06 11.2 V I93
2021-09-17 08:54:33 C 03 08 03.87 +04 02 03.9 u H21
2021-09-17 08:55:49 C 03 08 09.27 +04 01 07.1 u H21
2021-09-17 08:57:06 C 03 08 14.69 +04 00 10.5 u H21
2021-09-17 08:58:23 C 03 08 20.10 +03 59 13.5 u H21