IAA RAS IAA Minor Planet Database

2021 UB4

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.5568139262 ± 9.54e-05
Semi-major axis (a)2.4797857372 AU ± 5.74e-04
Inclination (i)1.97229509° ± 2.65e-04
Long. of Asc. Node (Ω)23.76853823° ± 1.86e-04
Arg. of Perihelion (ω)33.09030632° ± 1.34e-04
Mean Anomaly (M)8.89081828° ± 1.30e-01
Mean Motion (n)0.2524009816°/day ± 8.76e-05
Perihelion dist (q)1.09900650 AU ± 3.47e-04
Aphelion dist (Q)3.86056497 AU ± 9.24e-04
Orbital Period3.90500178 yr ± 1.36e-03
Physical Parameters
H (abs. magnitude)24.97
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.230″
Uncertainty3
Orbit TypeAmor
MOID0.110937 AU
Observations Used46
Oppositions1
Arc Total2021-2021
First Observation Used2021-10-28
Last Observation Used2021-11-28
Observations (46)
Date Type RA Dec Mag Band Observatory
2021-10-28 07:13:38 C 01 36 49.988 +13 04 32.97 – U F52
2021-10-28 07:31:03 C 01 36 51.989 +13 05 01.58 – U F52
2021-10-28 07:48:23 C 01 36 53.955 +13 05 29.69 – U F52
2021-10-28 08:05:48 C 01 36 55.933 +13 05 58.25 – U F52
2021-10-28 10:01:15 C 01 37 08.917 +13 09 04.19 – V F51
2021-10-28 10:02:11 C 01 37 09.015 +13 09 05.49 – V F51
2021-10-28 20:43:17 C 01 38 34.89 +13 25 55.2 – V L01
2021-10-28 20:50:11 C 01 38 35.75 +13 26 07.1 – V L01
2021-10-28 20:58:46 C 01 38 36.74 +13 26 21.6 – V L01
2021-10-28 22:56:28 C 01 38 50.98 +13 29 28.2 – V 033
2021-10-28 23:01:13 C 01 38 51.55 +13 29 36.5 – V 033
2021-10-28 23:05:58 C 01 38 52.09 +13 29 43.8 – V 033
2021-10-29 05:08:50 C 01 39 43.05 +13 39 53.5 – V 654
2021-10-29 07:10:50 C 01 39 57.69 +13 43 16.1 – V 654
2021-10-29 07:42:42 C 01 40 01.51 +13 44 08.3 – V 654
2021-10-29 22:42:39 C 01 42 05.85 +14 08 52.7 – V 033
2021-10-29 22:46:49 C 01 42 06.39 +14 09 00.3 – V 033
2021-10-29 22:50:58 C 01 42 06.95 +14 09 06.5 – V 033
2021-10-30 05:07:05 C 01 43 01.25 +14 19 57.5 – X 858
2021-10-30 05:33:00 C 01 43 04.50 +14 20 42.2 – X 858
2021-10-30 08:33:53 C 01 43 27.49 +14 25 48.6 – V H01
2021-10-30 08:38:28 C 01 43 28.07 +14 25 56.1 – V H01
2021-10-30 08:56:51 C 01 43 30.46 +14 26 26.8 – V H01
2021-10-30 09:03:46 C 01 43 31.36 +14 26 38.3 – V H01
2021-11-07 05:51:24 C 02 15 50.82 +20 19 47.3 – V G96
2021-11-07 05:59:00 C 02 15 52.19 +20 20 02.7 – V G96
2021-11-07 06:06:36 C 02 15 53.61 +20 20 17.8 – V G96
2021-11-07 06:14:11 C 02 15 54.98 +20 20 33.2 – V G96
2021-11-12 04:48:58 C 02 41 58.23 +24 18 49.3 – V I52
2021-11-12 04:50:05 C 02 41 58.47 +24 18 51.6 – V I52
2021-11-12 04:51:11 C 02 41 58.76 +24 18 54.5 – V I52
2021-11-12 04:52:17 C 02 41 58.94 +24 18 56.2 – V I52
2021-11-15 04:37:11 C 02 59 43.07 +26 38 50.4 – V G96
2021-11-15 04:45:11 C 02 59 45.06 +26 39 06.3 – V G96
2021-11-15 04:53:11 C 02 59 46.87 +26 39 21.3 – V G96
2021-11-15 05:01:10 C 02 59 48.76 +26 39 37.3 – V G96
2021-11-15 09:23:52 C 03 00 50.92 +26 47 49.9 – V I52
2021-11-15 09:27:10 C 03 00 51.74 +26 47 55.4 – V I52
2021-11-15 09:30:29 C 03 00 52.53 +26 48 01.3 – V I52
2021-11-26 11:36:28 C 04 13 02.503 +33 22 27.74 – U F52
2021-11-26 11:48:20 C 04 13 05.441 +33 22 38.82 – U F52
2021-11-26 12:00:15 C 04 13 08.335 +33 22 49.98 – U F52
2021-11-26 12:12:06 C 04 13 11.277 +33 23 00.45 – U F52
2021-11-28 06:57:20 C 04 24 32.93 +34 01 18.6 – V G96
2021-11-28 07:04:45 C 04 24 34.69 +34 01 25.0 – V G96
2021-11-28 07:12:12 C 04 24 36.49 +34 01 30.7 – V G96