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
2025-10-01 07:22:38 C 00 12 30.978 +19 12 44.06 V V00
2025-10-01 07:30:41 C 00 12 30.481 +19 12 36.04 V V00
2025-10-01 07:38:44 C 00 12 29.974 +19 12 28.01 V V00
2025-10-28 13:00:03 C 23 38 14.059 +05 31 04.23 W O18
2025-10-28 14:02:22 C 23 38 11.848 +05 29 42.72 W O18
2025-11-11 12:41:41 C 23 32 21.327 -01 12 58.00 W O18
2025-11-11 16:36:51 C 23 32 20.304 -01 17 07.95 W O18