2021 SM2

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.3930793288 ± 3.10e-07
Semi-major axis (a)1.5804969774 AU ± 1.19e-08
Inclination (i)20.08569519° ± 2.90e-05
Long. of Asc. Node (Ω)208.42079108° ± 2.63e-05
Arg. of Perihelion (ω)283.67256726° ± 7.25e-05
Mean Anomaly (M)304.71398845° ± 3.67e-05
Mean Motion (n)0.4960457942°/day ± 5.61e-09
Perihelion dist (q)0.95923629 AU ± 4.90e-07
Aphelion dist (Q)2.20175767 AU ± 4.90e-07
Orbital Period1.98696631 yr ± 2.25e-08
Physical Parameters
H (abs. magnitude)20.79
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.153″
Uncertainty0
Orbit TypeApollo
MOID0.155189 AU
Observations Used57
Oppositions5
Arc Total2015-2025
First Observation Used2015-12-01
Last Observation Used2025-11-11
Observations (57)
Date Type RA Dec Mag Band Observatory
2015-12-01 05:05:20 C 22 57 53.684 -04 12 11.34 V F51
2015-12-01 05:22:07 C 22 57 54.504 -04 12 18.12 V F51
2015-12-09 05:15:19 C 23 08 57.397 -05 13 02.11 V F51
2015-12-09 05:32:58 C 23 08 58.462 -05 13 06.57 V F51
2015-12-09 05:50:40 C 23 08 59.519 -05 13 11.38 V F51
2021-09-28 06:40:31 C 23 43 42.688 +18 58 41.88 U F52
2021-09-28 06:52:39 C 23 43 41.936 +18 58 30.59 U F52
2021-09-28 06:57:22 C 23 43 41.632 +18 58 26.34 U F52
2021-09-28 07:09:25 C 23 43 40.873 +18 58 14.88 U F52
2021-09-28 07:14:04 C 23 43 40.577 +18 58 10.64 U F52
2021-09-28 07:26:05 C 23 43 39.820 +18 57 59.27 U F52
2021-09-28 07:30:42 C 23 43 39.515 +18 57 54.98 U F52
2021-09-28 10:41:41 C 23 43 27.357 +18 54 53.63 V F51
2021-09-28 10:42:52 C 23 43 27.287 +18 54 52.60 V F51
2021-09-29 03:36:36 C 23 42 26.20 +18 38 34.0 u H21
2021-09-29 03:45:39 C 23 42 25.61 +18 38 25.6 u H21
2021-09-29 06:46:22 C 23 42 14.970 +18 35 32.25 U F51
2021-09-29 07:19:38 C 23 42 12.875 +18 35 00.08 U F51
2021-09-29 07:36:11 C 23 42 11.822 +18 34 44.17 U F51
2021-09-30 12:12:22 C 23 40 27.157 +18 06 26.01 U F51
2021-09-30 12:45:57 C 23 40 25.019 +18 05 51.98 U F51
2021-09-30 13:02:39 C 23 40 23.963 +18 05 34.91 U F51
2021-10-04 06:00:38 C 23 35 06.525 +16 32 32.60 U F51
2021-10-04 06:19:23 C 23 35 05.381 +16 32 12.48 U F51
2021-10-04 06:38:07 C 23 35 04.243 +16 31 52.35 U F51
2021-10-04 06:41:06 C 23 35 04.062 +16 31 48.83 U F52
2021-10-04 06:54:57 C 23 35 03.207 +16 31 33.94 U F52
2021-10-04 07:08:42 C 23 35 02.369 +16 31 19.48 U F52
2021-10-28 06:42:06 C 23 10 28.59 +05 12 43.4 V V00
2021-10-28 06:49:06 C 23 10 28.46 +05 12 35.2 V V00
2021-10-28 06:56:05 C 23 10 28.28 +05 12 27.3 V V00
2021-10-28 07:03:04 C 23 10 28.10 +05 12 19.2 V V00
2021-11-07 05:02:21 C 23 08 06.197 +01 00 22.55 U F52
2021-11-07 05:19:40 C 23 08 06.159 +01 00 05.89 U F52
2021-11-07 05:37:04 C 23 08 06.118 +00 59 48.84 U F52
2021-11-07 05:54:30 C 23 08 06.090 +00 59 31.97 U F52
2022-05-26 03:59:13 C 09 42 04.310 +10 19 31.40 V V06
2022-05-26 04:15:23 C 09 42 07.590 +10 19 32.40 V V06
2023-10-13 06:54:31 C 23 39 31.054 +13 16 46.56 X F52
2023-10-13 07:12:14 C 23 39 30.039 +13 16 24.51 X F52
2023-10-13 07:48:12 C 23 39 27.975 +13 15 39.67 X F52
2023-10-17 06:48:54 C 23 34 34.988 +11 15 57.07 X F51
2023-10-17 07:04:44 C 23 34 34.172 +11 15 36.90 X F51
2023-10-17 07:20:44 C 23 34 33.334 +11 15 16.48 X F51
2025-09-27 05:41:24 C 00 18 18.34 +20 44 37.1 V H21
2025-09-27 06:01:52 C 00 18 17.11 +20 44 18.7 V H21
2025-09-27 06:12:14 C 00 18 16.46 +20 44 09.6 V H21
2025-09-29 05:20:19 C 00 15 30.72 +20 01 19.0 V H21
2025-09-29 05:23:08 C 00 15 30.56 +20 01 16.7 V H21
2025-10-01 07:14:34 C 00 12 31.511 +19 12 52.09 V V00