IAA RAS IAA Minor Planet Database

2021 EC4

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.5031339819 ± 5.10e-05
Semi-major axis (a)0.9502630726 AU ± 1.54e-05
Inclination (i)7.33836061° ± 1.00e-03
Long. of Asc. Node (Ω)1.61576844° ± 7.76e-04
Arg. of Perihelion (ω)303.99072174° ± 1.19e-03
Mean Anomaly (M)300.42163115° ± 3.88e-02
Mean Motion (n)1.0640119288°/day ± 2.59e-05
Perihelion dist (q)0.47215343 AU ± 4.91e-05
Aphelion dist (Q)1.42837272 AU ± 5.37e-05
Orbital Period0.92633011 yr ± 2.26e-05
Physical Parameters
H (abs. magnitude)24.15
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.305″
Uncertainty2
Orbit TypeAten
MOID0.001916 AU
Observations Used46
Oppositions1
Arc Total2021-2021
First Observation Used2021-02-12
Last Observation Used2021-03-21
Observations (46)
Date Type RA Dec Mag Band Observatory
2021-02-12 14:01:55 C 12 22 46.93 +11 32 22.7 – W T14
2021-02-12 14:03:41 C 12 22 46.85 +11 32 23.8 – W T14
2021-02-12 14:16:23 C 12 22 46.30 +11 32 30.1 – W T14
2021-02-14 14:14:41 C 12 20 43.00 +11 58 34.7 – W T14
2021-03-11 05:48:06 C 10 32 23.98 +23 37 16.1 – V G96
2021-03-11 05:55:32 C 10 32 20.71 +23 37 28.4 – V G96
2021-03-11 06:10:21 C 10 32 14.04 +23 37 54.9 – V G96
2021-03-11 09:19:14 C 10 30 49.22 +23 43 19.5 – V I52
2021-03-11 09:21:39 C 10 30 48.18 +23 43 23.1 – V I52
2021-03-11 09:24:05 C 10 30 47.07 +23 43 27.4 – V I52
2021-03-12 20:06:20 C 10 14 52.37 +24 42 41.6 – V 033
2021-03-12 20:08:53 C 10 14 51.05 +24 42 45.9 – V 033
2021-03-12 20:11:26 C 10 14 49.81 +24 42 49.7 – V 033
2021-03-12 20:14:14 C 10 14 48.42 +24 42 54.8 – V 033
2021-03-12 22:23:57 C 10 13 43.50 +24 46 39.3 – V L01
2021-03-12 22:27:42 C 10 13 41.60 +24 46 45.7 – V L01
2021-03-12 22:31:45 C 10 13 39.63 +24 46 52.6 – V L01
2021-03-13 00:56:10 C 10 12 27.13 +24 50 49.5 – V 204
2021-03-13 01:21:07 C 10 12 14.64 +24 51 29.5 – V 204
2021-03-14 19:13:10 C 09 50 25.40 +25 57 47.8 – V 033
2021-03-14 19:15:15 C 09 50 24.23 +25 57 51.2 – V 033
2021-03-14 19:17:20 C 09 50 23.02 +25 57 54.2 – V 033
2021-03-14 19:19:24 C 09 50 21.87 +25 57 57.6 – V 033
2021-03-14 19:21:30 C 09 50 20.70 +25 58 00.5 – V 033
2021-03-14 20:39:07 C 09 49 38.909 +26 00 17.62 – V J04
2021-03-14 20:53:04 C 09 49 30.975 +26 00 39.72 – V J04
2021-03-14 21:06:47 C 09 49 23.116 +26 01 00.59 – V J04
2021-03-15 07:42:42 C 09 43 20.19 +26 16 15.6 – o 291
2021-03-15 07:49:23 C 09 43 16.27 +26 16 24.7 – o 291
2021-03-15 07:56:11 C 09 43 12.29 +26 16 33.8 – o 291
2021-03-16 21:05:22 C 09 21 07.778 +27 03 52.59 – V J04
2021-03-16 21:18:08 C 09 20 59.604 +27 04 07.45 – V J04
2021-03-16 21:30:57 C 09 20 51.456 +27 04 21.79 – V J04
2021-03-18 02:45:34 C 09 02 12.30 +27 32 29.1 – V I52
2021-03-18 02:51:34 C 09 02 08.27 +27 32 35.1 – V I52
2021-03-18 02:57:18 C 09 02 04.43 +27 32 40.1 – V I52
2021-03-18 03:02:08 C 09 02 01.17 +27 32 43.9 – V I52
2021-03-18 04:08:45 C 09 01 16.29 +27 33 40.4 – V 291
2021-03-18 04:15:16 C 09 01 11.89 +27 33 45.8 – V 291
2021-03-18 04:21:49 C 09 01 07.47 +27 33 50.8 – V 291
2021-03-19 02:48:11 C 08 46 11.20 +27 48 36.2 – V I52
2021-03-19 02:53:01 C 08 46 07.85 +27 48 39.4 – V I52
2021-03-19 02:57:51 C 08 46 04.47 +27 48 41.7 – V I52
2021-03-19 03:02:42 C 08 46 01.10 +27 48 44.4 – V I52
2021-03-21 02:47:43 C 08 12 58.40 +27 58 24.4 – o 691
2021-03-21 02:56:36 C 08 12 52.02 +27 58 23.9 – o 691