IAA RAS IAA Minor Planet Database

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
2021-03-15 09:28:46 C 13 35 02.82 +36 52 40.8 – V T05
2021-03-15 09:46:25 C 13 35 00.78 +36 50 21.8 – V T05
2021-03-15 10:20:31 C 13 34 56.55 +36 45 44.6 – V T05
2021-03-15 10:44:45 C 13 34 53.09 +36 42 25.6 – V T05
2021-03-15 20:56:06 C 13 35 19.96 +34 54 19.7 – V 595
2021-03-15 20:56:22 C 13 35 20.17 +34 54 23.4 – V L01
2021-03-15 20:57:18 C 13 35 20.14 +34 54 13.9 – V L01
2021-03-15 21:01:47 C 13 35 19.97 +34 53 28.2 – V L01
2021-03-15 21:06:15 C 13 35 19.71 +34 52 42.3 – V L01
2021-03-15 21:07:11 C 13 35 19.65 +34 52 33.1 – V L01
2021-03-15 21:14:35 C 13 35 19.02 +34 51 10.6 – V 595
2021-03-15 21:22:25 C 13 35 18.65 +34 49 50.1 – V 595
2021-03-15 21:45:50 C 13 35 17.13 +34 45 44.6 – V 595
2021-03-15 21:53:40 C 13 35 16.61 +34 44 22.0 – V 595
2021-03-15 21:59:08 C 13 35 16.15 +34 43 23.9 – V 595
2021-03-15 22:06:20 C 13 35 22.23 +34 42 06.8 – V B49
2021-03-15 22:10:16 C 13 35 21.98 +34 41 26.9 – V B49
2021-03-15 22:12:52 C 13 35 21.82 +34 40 59.2 – V B49
2021-03-15 22:26:36 C 13 35 20.90 +34 38 34.3 – V B49
2021-03-15 22:36:49 C 13 35 15.25 +34 36 29.2 – V 203
2021-03-15 22:53:20 C 13 35 13.75 +34 33 28.5 – V 203
2021-03-15 23:00:12 C 13 35 12.86 +34 32 32.3 – V K63
2021-03-15 23:10:51 C 13 35 11.71 +34 30 34.1 – V K63
2021-03-15 23:18:33 C 13 35 10.85 +34 29 08.1 – V K63
2021-03-15 23:24:29 C 13 35 29.903 +34 29 09.19 – V J04
2021-03-15 23:24:53 C 13 35 29.878 +34 29 05.48 – V J04
2021-03-15 23:25:16 C 13 35 29.808 +34 29 01.17 – V J04
2021-03-16 03:06:04 C 13 34 42.45 +33 42 27.9 – V 204
2021-03-16 03:12:45 C 13 34 41.64 +33 40 59.2 – V 204
2021-03-16 03:19:25 C 13 34 40.84 +33 39 29.9 – V 204
2021-03-16 20:13:53 C 13 36 07.41 +29 06 01.6 – V 033
2021-03-16 20:14:23 C 13 36 07.40 +29 05 52.6 – V 033
2021-03-16 20:14:53 C 13 36 07.39 +29 05 43.5 – V 033
2021-03-16 21:58:40 C 13 36 05.89 +28 31 13.0 – V Z99
2021-03-16 22:00:16 C 13 36 05.82 +28 30 41.2 – V Z99
2021-03-16 22:01:52 C 13 36 05.75 +28 30 09.2 – V Z99
2021-03-16 22:03:28 C 13 36 05.66 +28 29 37.4 – V Z99
2021-03-16 22:05:05 C 13 36 05.56 +28 29 05.2 – V Z99
2021-03-16 22:06:41 C 13 36 05.49 +28 28 33.5 – V Z99
2021-03-17 00:41:47 C 13 35 46.91 +27 36 18.8 – V K38
2021-03-17 00:49:39 C 13 35 45.62 +27 33 24.0 – V K38
2021-03-17 00:57:31 C 13 35 44.35 +27 30 27.9 – V K38
2021-03-17 20:36:42 C 13 37 23.50 +17 11 40.1 – V 033
2021-03-17 20:37:12 C 13 37 23.49 +17 11 19.3 – V 033
2021-03-17 22:38:24 C 13 37 20.80 +15 44 20.6 – V 203
2021-03-17 22:43:26 C 13 37 20.11 +15 40 30.9 – V 203
2021-03-17 22:48:33 C 13 37 19.42 +15 36 37.3 – V 203
2021-03-17 23:07:42 C 13 37 19.87 +15 19 45.6 – V Z80
2021-03-17 23:16:02 C 13 37 18.96 +15 13 17.4 – V Z80
2021-03-17 23:25:21 C 13 37 17.88 +15 06 00.0 – V Z80