2021 SM

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.6806237018 ± 5.22e-05
Semi-major axis (a)1.9321741832 AU ± 2.51e-04
Inclination (i)3.10637119° ± 1.47e-04
Long. of Asc. Node (Ω)318.03664015° ± 5.80e-04
Arg. of Perihelion (ω)307.44892784° ± 3.14e-04
Mean Anomaly (M)220.73869574° ± 1.13e-01
Mean Motion (n)0.3669803949°/day ± 7.14e-05
Perihelion dist (q)0.61709064 AU ± 1.29e-04
Aphelion dist (Q)3.24725773 AU ± 4.33e-04
Orbital Period2.68577367 yr ± 5.23e-04
Physical Parameters
H (abs. magnitude)22.28
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.221″
Uncertainty3
Orbit TypeApollo
MOID0.031166 AU
Observations Used39
Oppositions1
Arc Total2021-2021
First Observation Used2021-09-17
Last Observation Used2021-10-25
Observations (43)
Date Type RA Dec Mag Band Observatory
2021-09-15 08:56:57 C 03 06 38.99 +36 11 41.4 V 703
2021-09-15 09:19:35 C 03 06 19.67 +36 10 21.6 V 703
2021-09-17 10:31:07 C 02 30 20.529 +33 03 13.65 U F52
2021-09-17 10:31:26 C 02 30 20.293 +33 03 12.18 V F51
2021-09-17 10:46:48 C 02 30 10.164 +33 02 14.72 U F52
2021-09-17 11:02:29 C 02 29 59.833 +33 01 16.00 U F52
2021-09-17 11:05:08 C 02 29 58.064 +33 01 05.79 V F51
2021-09-17 11:18:14 C 02 29 49.466 +33 00 16.95 U F52
2021-09-17 11:21:05 C 02 29 47.611 +33 00 06.31 V F51
2021-09-17 12:55:12 C 02 28 45.679 +32 54 09.47 V F51
2021-09-17 12:56:22 C 02 28 44.941 +32 54 05.16 V F51
2021-09-17 23:35:16 C 02 22 13.80 +32 12 59.6 V B49
2021-09-17 23:36:55 C 02 22 12.79 +32 12 53.7 V B49
2021-09-18 20:26:53 C 02 10 24.69 +30 54 40.3 X 595
2021-09-18 20:53:28 C 02 10 10.34 +30 53 04.5 X 595
2021-09-18 21:20:38 C 02 09 55.63 +30 51 27.4 X 595
2021-09-18 22:09:00 C 02 09 29.61 +30 48 34.3 V 104
2021-09-18 22:17:21 C 02 09 25.12 +30 48 04.1 V 104
2021-09-18 22:19:26 C 02 09 24.01 +30 47 56.7 V 104
2021-09-18 22:25:42 C 02 09 20.60 +30 47 33.9 V 104
2021-09-18 22:40:49 C 02 09 13.12 +30 46 38.4 X Z41
2021-09-18 22:48:23 C 02 09 08.41 +30 46 02.0 V J95
2021-09-18 22:57:32 C 02 09 03.50 +30 45 29.2 V J95
2021-09-18 23:08:25 C 02 08 57.64 +30 44 50.5 V J95
2021-09-18 23:18:24 C 02 08 52.26 +30 44 14.5 V J95
2021-09-18 23:48:13 C 02 08 36.77 +30 42 36.2 X Z41
2021-09-18 23:48:24 C 02 08 36.64 +30 42 35.6 X Z41
2021-09-19 23:32:22 C 01 56 49.07 +29 17 19.8 V 204
2021-09-19 23:50:03 C 01 56 40.60 +29 16 18.7 V 204
2021-09-20 00:02:57 C 01 56 34.42 +29 15 33.7 V 204
2021-09-28 08:01:54 C 00 56 13.679 +20 08 18.85 U F52
2021-09-28 08:20:15 C 00 56 10.025 +20 07 42.03 U F52
2021-09-28 08:38:39 C 00 56 06.350 +20 07 04.90 U F52
2021-10-03 07:33:41 C 00 37 50.536 +16 39 15.80 U F52
2021-10-03 07:49:13 C 00 37 48.514 +16 38 53.09 U F52
2021-10-03 08:20:13 C 00 37 44.479 +16 38 07.79 U F52
2021-10-07 05:12:12 C 00 28 00.60 +14 35 28.8 V G96
2021-10-07 05:19:40 C 00 27 59.90 +14 35 20.1 V G96
2021-10-07 05:27:07 C 00 27 59.16 +14 35 11.7 V G96
2021-10-07 05:34:33 C 00 27 58.47 +14 35 02.8 V G96
2021-10-25 02:25:24 C 00 08 57.83 +09 22 19.0 o 291
2021-10-25 02:50:21 C 00 08 57.39 +09 22 09.1 o 291
2021-10-25 03:15:18 C 00 08 56.97 +09 21 58.8 o 291