IAA RAS IAA Minor Planet Database

2021 UG4

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.3121901397 ± 1.74e-04
Semi-major axis (a)1.4220211245 AU ± 3.64e-04
Inclination (i)12.83732333° ± 5.52e-03
Long. of Asc. Node (Ω)220.55325656° ± 2.82e-04
Arg. of Perihelion (ω)222.70506709° ± 3.20e-03
Mean Anomaly (M)117.64837434° ± 3.19e-01
Mean Motion (n)0.5812369353°/day ± 2.23e-04
Perihelion dist (q)0.97808015 AU ± 3.52e-04
Aphelion dist (Q)1.86596210 AU ± 5.37e-04
Orbital Period1.69573925 yr ± 6.51e-04
Physical Parameters
H (abs. magnitude)25.74
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.252″
Uncertainty3
Orbit TypeApollo
MOID0.041792 AU
Observations Used43
Oppositions1
Arc Total2021-2021
First Observation Used2021-10-28
Last Observation Used2021-11-07
Observations (43)
Date Type RA Dec Mag Band Observatory
2021-10-28 08:17:22 C 02 25 01.940 +32 51 07.62 – U F52
2021-10-28 08:34:56 C 02 25 07.057 +32 49 45.17 – U F52
2021-10-28 08:52:30 C 02 25 12.164 +32 48 22.06 – U F52
2021-10-28 09:10:10 C 02 25 17.266 +32 46 58.32 – U F52
2021-10-28 14:15:59 C 02 26 47.238 +32 21 27.37 – V F51
2021-10-28 14:16:54 C 02 26 47.526 +32 21 22.26 – V F51
2021-10-28 22:20:28 C 02 29 39.07 +31 39 28.9 – V 033
2021-10-28 22:22:48 C 02 29 39.80 +31 39 16.9 – V 033
2021-10-28 22:25:08 C 02 29 40.55 +31 39 04.6 – V 033
2021-10-28 22:27:27 C 02 29 41.28 +31 38 52.6 – V 033
2021-10-28 23:39:09 C 02 30 03.38 +31 32 47.0 – V L01
2021-10-28 23:42:54 C 02 30 04.53 +31 32 27.4 – V L01
2021-10-28 23:46:38 C 02 30 05.72 +31 32 07.7 – V L01
2021-10-28 23:50:42 C 02 30 07.00 +31 31 46.7 – V L01
2021-10-28 23:54:08 C 02 30 08.07 +31 31 28.2 – V L01
2021-10-29 03:55:28 C 02 31 26.48 +31 09 15.0 – V 033
2021-10-29 03:57:43 C 02 31 27.29 +31 09 02.5 – V 033
2021-10-29 03:59:58 C 02 31 28.01 +31 08 50.1 – V 033
2021-10-30 04:25:42 C 02 40 13.57 +28 46 05.3 – V 033
2021-10-30 04:27:27 C 02 40 14.22 +28 45 54.4 – V 033
2021-10-30 04:29:11 C 02 40 14.83 +28 45 43.2 – V 033
2021-10-30 04:30:59 C 02 40 15.49 +28 45 31.5 – V 033
2021-10-30 10:02:41 C 02 42 20.62 +28 11 13.2 – V H01
2021-10-30 10:13:34 C 02 42 24.44 +28 10 00.8 – V H01
2021-10-30 10:22:09 C 02 42 27.47 +28 09 03.5 – V H01
2021-10-30 10:35:05 C 02 42 32.02 +28 07 37.3 – V H01
2021-11-06 09:49:09 C 04 02 32.103 -00 32 18.48 – U F52
2021-11-06 10:24:25 C 04 02 50.499 -00 40 25.22 – U F52
2021-11-06 10:27:06 C 04 02 51.924 -00 41 02.80 – U F51
2021-11-06 10:42:02 C 04 02 59.709 -00 44 29.43 – U F52
2021-11-06 10:44:14 C 04 03 00.842 -00 44 59.69 – U F51
2021-11-06 10:57:48 C 04 02 59.57 -00 48 43.1 – V I52
2021-11-06 10:58:09 C 04 02 59.71 -00 48 47.7 – V I52
2021-11-06 10:58:30 C 04 02 59.97 -00 48 52.2 – V I52
2021-11-06 10:58:52 C 04 03 00.10 -00 48 57.3 – V I52
2021-11-06 11:01:21 C 04 03 09.769 -00 48 56.77 – U F51
2021-11-07 04:53:11 C 04 13 34.78 -04 56 20.5 – u 807
2021-11-07 04:58:45 C 04 13 37.80 -04 57 39.3 – u 807
2021-11-07 05:04:30 C 04 13 40.90 -04 59 00.1 – u 807
2021-11-07 10:29:56 C 04 16 45.87 -06 19 07.6 – V I52
2021-11-07 10:30:48 C 04 16 46.36 -06 19 20.1 – V I52
2021-11-07 10:31:39 C 04 16 46.81 -06 19 32.0 – V I52
2021-11-07 10:32:30 C 04 16 47.28 -06 19 44.2 – V I52