2021 EF4

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.6971670056 ± 5.53e-07
Semi-major axis (a)1.4827055930 AU ± 1.90e-08
Inclination (i)48.86860689° ± 8.41e-05
Long. of Asc. Node (Ω)345.36535809° ± 1.67e-05
Arg. of Perihelion (ω)312.38672155° ± 5.06e-05
Mean Anomaly (M)158.98432699° ± 4.17e-05
Mean Motion (n)0.5459211091°/day ± 1.05e-08
Perihelion dist (q)0.44901217 AU ± 8.20e-07
Aphelion dist (Q)2.51639901 AU ± 8.21e-07
Orbital Period1.80543721 yr ± 3.48e-08
Physical Parameters
H (abs. magnitude)20.32
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.259″
Uncertainty0
Orbit TypeApollo
MOID0.242641 AU
Observations Used39
Oppositions5
Arc Total2012-2023
First Observation Used2012-02-20
Last Observation Used2023-01-24
Observations (41)
Date Type RA Dec Mag Band Observatory
2012-02-20 10:34:58 C 11 49 37.410 +20 06 46.08 V F51
2012-02-20 11:18:46 C 11 49 31.345 +20 06 50.48 V F51
2012-02-20 11:40:51 C 11 49 28.292 +20 06 52.72 V F51
2021-02-11 14:24:02 C 12 00 16.947 +24 19 06.73 V F52
2021-02-11 14:44:28 C 12 00 14.948 +24 19 12.15 V F52
2021-02-11 15:04:56 C 12 00 12.927 +24 19 18.66 V F52
2021-02-11 15:25:27 C 12 00 10.872 +24 19 23.60 V F52
2021-02-12 10:00:42 C 11 58 21.906 +24 24 40.91 V F52
2021-02-12 10:18:24 C 11 58 20.123 +24 24 46.10 V F52
2021-02-12 10:36:04 C 11 58 18.321 +24 24 51.74 V F52
2021-03-11 05:46:44 C 10 11 07.98 +24 46 21.3 V G96
2021-03-11 05:54:10 C 10 11 06.31 +24 46 17.9 V G96
2021-03-11 06:01:33 C 10 11 04.66 +24 46 14.0 V G96
2021-03-11 06:08:58 C 10 11 03.08 +24 46 11.0 V G96
2021-03-11 09:37:53 C 10 10 17.10 +24 44 32.4 V I52
2021-03-11 09:42:44 C 10 10 16.02 +24 44 29.5 V I52
2021-03-11 09:47:34 C 10 10 14.96 +24 44 27.1 V I52
2021-03-12 20:18:59 C 10 02 45.46 +24 26 55.1 V 033
2021-03-12 20:24:08 C 10 02 44.36 +24 26 52.0 V 033
2021-03-12 23:03:54 C 10 02 09.09 +24 25 26.0 V L01
2021-03-12 23:08:24 C 10 02 08.12 +24 25 23.5 V L01
2021-03-12 23:14:34 C 10 02 06.73 +24 25 20.2 V L01
2021-03-13 18:40:12 C 09 57 53.55 +24 14 15.4 V 033
2021-03-13 18:45:16 C 09 57 52.45 +24 14 12.8 V 033
2021-03-13 21:21:18 C 09 57 18.55 +24 12 44.4 V J04
2021-03-13 21:33:21 C 09 57 15.90 +24 12 37.6 V J04
2021-03-13 21:45:20 C 09 57 13.30 +24 12 30.8 V J04
2021-04-01 23:48:40 C 08 29 09.67 +16 55 31.2 V 807
2021-04-01 23:55:36 C 08 29 08.59 +16 55 23.1 V 807
2021-04-02 00:02:21 C 08 29 07.53 +16 55 15.2 V 807
2021-04-02 05:20:59 C 08 28 18.65 +16 48 50.8 V V06
2021-04-02 05:25:33 C 08 28 17.97 +16 48 45.0 V V06
2021-04-02 05:30:06 C 08 28 17.22 +16 48 39.5 V V06
2021-04-07 04:15:43 C 08 11 43.81 +14 29 15.2 V G96
2021-04-07 04:29:23 C 08 11 42.01 +14 28 58.9 V G96
2021-04-17 23:45:59 C 07 44 16.39 +09 30 54.6 V 807
2021-04-17 23:53:57 C 07 44 15.67 +09 30 45.9 V 807
2021-04-18 00:01:56 C 07 44 14.95 +09 30 36.9 V 807
2023-01-24 15:46:05 C 13 59 15.109 -15 24 59.71 V T12
2023-01-24 15:52:28 C 13 59 15.684 -15 25 12.18 V T12
2023-01-24 15:58:52 C 13 59 16.259 -15 25 24.52 V T12