2021 EM4

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.1330710516 ± 5.91e-06
Semi-major axis (a)1.0844218644 AU ± 5.96e-06
Inclination (i)9.93229130° ± 3.49e-04
Long. of Asc. Node (Ω)358.19665678° ± 1.52e-05
Arg. of Perihelion (ω)240.37361555° ± 5.48e-04
Mean Anomaly (M)3.14004405° ± 1.13e-02
Mean Motion (n)0.8728002824°/day ± 7.20e-06
Perihelion dist (q)0.94011671 AU ± 8.23e-06
Aphelion dist (Q)1.22872702 AU ± 9.31e-06
Orbital Period1.12926898 yr ± 9.31e-06
Physical Parameters
H (abs. magnitude)27.14
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.286″
Uncertainty2
Orbit TypeApollo
MOID0.003160 AU
Observations Used64
Oppositions1
Arc Total2021-2021
First Observation Used2021-03-15
Last Observation Used2021-03-20
Observations (68)
Date Type RA Dec Mag Band Observatory
2021-03-18 00:00:41 C 13 37 07.51 +14 39 54.2 V 204
2021-03-18 00:04:25 C 13 37 06.81 +14 36 53.5 V 204
2021-03-18 00:08:15 C 13 37 06.08 +14 33 47.6 V 204
2021-03-18 01:42:29 C 13 36 44.49 +13 13 13.8 V 033
2021-03-18 01:42:54 C 13 36 44.41 +13 12 53.1 V 033
2021-03-18 01:43:19 C 13 36 44.34 +13 12 30.8 V 033
2021-03-18 07:10:53 C 13 38 08.05 +08 02 52.6 U I41
2021-03-18 07:11:23 C 13 38 07.87 +08 02 20.5 U I41
2021-03-18 07:56:58 C 13 37 57.94 +07 13 18.7 U I41
2021-03-18 07:57:29 C 13 37 57.77 +07 12 45.0 U I41
2021-03-19 13:16:23 C 13 42 49.57 -45 10 51.2 V 474
2021-03-19 13:16:55 C 13 42 49.38 -45 12 04.0 V 474
2021-03-19 13:17:16 C 13 42 49.32 -45 12 53.3 V 474
2021-03-19 13:17:48 C 13 42 49.15 -45 14 06.2 V 474
2021-03-20 09:04:03 C 14 10 14.91 -80 27 37.1 V 474
2021-03-20 09:04:30 C 14 10 16.94 -80 28 13.2 V 474
2021-03-20 09:04:57 C 14 10 18.61 -80 28 49.2 V 474
2021-03-20 09:05:23 C 14 10 20.55 -80 29 25.0 V 474