2021 AR4

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.4869375208 ± 3.70e-05
Semi-major axis (a)2.2820554373 AU ± 1.75e-04
Inclination (i)36.34627163° ± 5.20e-04
Long. of Asc. Node (Ω)244.84351583° ± 4.92e-04
Arg. of Perihelion (ω)170.29961002° ± 1.32e-04
Mean Anomaly (M)154.27145403° ± 5.93e-02
Mean Motion (n)0.2859058163°/day ± 3.29e-05
Perihelion dist (q)1.17083702 AU ± 1.23e-04
Aphelion dist (Q)3.39327385 AU ± 2.74e-04
Orbital Period3.44738102 yr ± 3.97e-04
Physical Parameters
H (abs. magnitude)19.61
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.354″
Uncertainty2
Orbit TypeAmor
MOID0.187522 AU
Observations Used53
Oppositions1
Arc Total2020-2021
First Observation Used2020-11-28
Last Observation Used2021-03-05
Observations (55)
Date Type RA Dec Mag Band Observatory
2020-11-28 04:00:14 C 21 59 05.647 +25 10 45.48 V G96
2020-11-28 04:07:39 C 21 59 07.174 +25 10 32.66 V G96
2020-11-28 04:15:03 C 21 59 08.549 +25 10 20.39 V G96
2021-01-08 06:29:41 C 01 19 09.016 -02 47 48.74 U F51
2021-01-08 07:05:14 C 01 19 15.213 -02 48 30.97 U F51
2021-01-08 07:23:00 C 01 19 18.292 -02 48 51.75 U F51
2021-01-08 17:08:24 C 01 21 02.11 -03 00 26.7 V L01
2021-01-08 17:15:12 C 01 21 03.25 -03 00 34.0 V L01
2021-01-08 17:23:21 C 01 21 04.67 -03 00 44.1 V L01
2021-01-09 01:35:48 C 01 22 30.77 -03 10 03.1 u 807
2021-01-09 01:41:21 C 01 22 31.77 -03 10 09.0 u 807
2021-01-09 01:46:45 C 01 22 32.69 -03 10 14.7 u 807
2021-01-09 02:45:06 C 01 22 43.04 -03 11 36.1 o 711
2021-01-09 02:52:54 C 01 22 44.55 -03 11 44.3 o 691
2021-01-09 03:02:42 C 01 22 46.25 -03 11 55.8 o 691
2021-01-09 03:12:30 C 01 22 47.94 -03 12 07.1 o 691
2021-01-10 01:58:06 C 01 26 46.33 -03 38 00.2 V I52
2021-01-10 02:01:43 C 01 26 47.07 -03 38 02.7 V I52
2021-01-10 02:07:10 C 01 26 47.88 -03 38 11.1 V I52
2021-01-10 17:06:40 C 01 29 23.68 -03 54 49.8 V 033
2021-01-10 17:11:49 C 01 29 24.56 -03 54 55.6 V 033
2021-01-10 17:17:00 C 01 29 25.44 -03 55 01.2 V 033
2021-01-11 02:01:45 C 01 30 55.22 -04 04 16.6 u 807
2021-01-11 02:08:53 C 01 30 56.47 -04 04 24.7 u 807
2021-01-11 02:15:50 C 01 30 57.65 -04 04 31.8 u 807
2021-01-11 17:30:35 C 01 33 34.77 -04 21 06.0 V L01
2021-01-11 17:35:06 C 01 33 35.53 -04 21 11.1 V L01
2021-01-11 17:38:30 C 01 33 36.13 -04 21 14.7 V L01
2021-01-11 17:43:00 C 01 33 36.88 -04 21 19.0 V L01
2021-01-13 02:12:35 C 01 39 07.12 -04 54 50.8 V G96
2021-01-13 02:20:43 C 01 39 08.48 -04 54 59.0 V G96
2021-01-13 02:28:52 C 01 39 09.83 -04 55 07.3 V G96
2021-01-13 02:36:59 C 01 39 11.21 -04 55 15.6 V G96
2021-01-14 01:37:11 C 01 43 01.98 -05 17 51.3 u 807
2021-01-14 01:46:12 C 01 43 03.42 -05 17 59.8 u 807
2021-01-14 01:54:50 C 01 43 04.82 -05 18 07.9 u 807
2021-01-14 03:17:08 C 01 43 18.72 -05 19 40.0 V I52
2021-01-14 03:25:58 C 01 43 20.19 -05 19 48.4 V I52
2021-01-14 03:34:49 C 01 43 21.62 -05 19 57.5 V I52
2021-01-15 02:05:18 C 01 47 05.11 -05 41 14.1 u 807
2021-01-15 02:14:21 C 01 47 06.62 -05 41 22.0 u 807
2021-01-15 02:23:00 C 01 47 08.03 -05 41 29.5 u 807
2021-02-06 02:10:41 C 03 05 27.81 -11 05 13.9 V V06
2021-02-06 02:17:32 C 03 05 28.72 -11 05 15.9 V V06
2021-02-06 02:24:23 C 03 05 29.63 -11 05 18.1 V V06
2021-02-06 02:31:14 C 03 05 30.55 -11 05 20.4 V V06
2021-02-11 01:16:49 C 03 21 12.61 -11 41 01.0 V 807
2021-02-11 01:22:47 C 03 21 13.40 -11 41 02.4 V 807
2021-02-11 01:28:43 C 03 21 14.17 -11 41 04.2 V 807
2021-02-21 01:02:26 C 03 51 28.01 -12 25 56.0 V 807