2021 UN4

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.3186961977 ± 2.43e-05
Semi-major axis (a)1.7444651243 AU ± 7.05e-05
Inclination (i)32.49037298° ± 9.25e-04
Long. of Asc. Node (Ω)207.32443383° ± 8.37e-05
Arg. of Perihelion (ω)157.90908448° ± 4.13e-04
Mean Anomaly (M)287.85360229° ± 3.94e-02
Mean Motion (n)0.4277783875°/day ± 2.59e-05
Perihelion dist (q)1.18851072 AU ± 6.41e-05
Aphelion dist (Q)2.30041953 AU ± 1.02e-04
Orbital Period2.30405816 yr ± 1.40e-04
Physical Parameters
H (abs. magnitude)21.65
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.214″
Uncertainty2
Orbit TypeAmor
MOID0.208798 AU
Observations Used73
Oppositions1
Arc Total2021-2021
First Observation Used2021-10-25
Last Observation Used2021-12-02
Observations (80)
Date Type RA Dec Mag Band Observatory
2021-10-25 12:27:42 C 00 49 39.931 +01 42 54.40 V P07
2021-10-25 13:27:37 C 00 49 45.422 +01 37 13.44 V P07
2021-10-25 13:55:53 C 00 49 47.947 +01 34 33.06 V P07
2021-10-25 16:30:33 C 00 50 01.930 +01 19 54.88 V P07
2021-10-25 17:00:49 C 00 50 04.644 +01 17 03.34 V P07
2021-10-29 05:59:39 C 00 58 17.78 -06 09 15.2 V G96
2021-10-29 06:07:05 C 00 58 18.40 -06 09 50.7 V G96
2021-10-29 06:14:33 C 00 58 19.03 -06 10 26.7 V G96
2021-10-29 06:22:02 C 00 58 19.65 -06 11 02.7 V G96
2021-10-29 07:11:54 C 00 58 23.88 -06 15 02.1 V I52
2021-10-29 07:12:30 C 00 58 23.92 -06 15 05.4 V I52
2021-10-29 07:15:30 C 00 58 24.17 -06 15 19.4 V I52
2021-10-29 07:18:30 C 00 58 24.46 -06 15 33.8 V I52
2021-10-29 07:21:50 C 00 58 26.344 -06 15 43.75 U F52
2021-10-29 07:39:16 C 00 58 27.801 -06 17 07.74 U F52
2021-10-29 07:41:02 C 00 58 26.24 -06 17 22.6 V H01
2021-10-29 07:46:24 C 00 58 26.70 -06 17 48.2 V H01
2021-10-29 07:56:40 C 00 58 29.245 -06 18 31.02 U F52
2021-10-29 08:00:15 C 00 58 27.89 -06 18 54.5 V H01
2021-10-29 08:13:17 C 00 58 29.01 -06 19 56.9 V H01
2021-10-29 08:14:03 C 00 58 30.688 -06 19 54.16 U F52
2021-10-29 14:49:47 C 00 59 07.68 -06 51 27.9 V N88
2021-10-29 14:50:40 C 00 59 07.75 -06 51 31.6 V N88
2021-10-29 14:51:31 C 00 59 07.84 -06 51 36.6 V N88
2021-10-29 14:52:22 C 00 59 07.88 -06 51 39.4 V N88
2021-10-29 18:54:34 C 00 59 30.39 -07 10 41.4 V 246
2021-10-29 18:59:31 C 00 59 30.86 -07 11 04.1 V 246
2021-10-29 18:59:56 C 00 59 30.91 -07 11 06.2 V 246
2021-10-29 19:01:09 C 00 59 30.93 -07 11 12.4 V 246
2021-10-29 21:19:02 C 00 59 42.74 -07 21 54.5 V L01
2021-10-29 21:22:21 C 00 59 43.02 -07 22 09.5 V L01
2021-10-29 21:24:28 C 00 59 43.20 -07 22 19.2 V L01
2021-10-29 21:27:07 C 00 59 43.42 -07 22 31.5 V L01
2021-10-29 21:29:36 C 00 59 43.65 -07 22 43.5 V L01
2021-10-29 21:59:14 C 00 59 46.23 -07 25 03.6 V 033
2021-10-29 21:59:49 C 00 59 46.25 -07 25 06.2 V 033
2021-10-29 22:00:23 C 00 59 46.32 -07 25 08.5 V 033
2021-10-29 22:01:02 C 00 59 46.35 -07 25 11.5 V 033
2021-10-30 01:39:45 C 01 00 06.46 -07 41 26.6 X Y00
2021-10-30 01:50:34 C 01 00 08.15 -07 42 11.2 u 807
2021-10-30 01:54:06 C 01 00 08.46 -07 42 27.5 u 807
2021-10-30 01:57:38 C 01 00 08.74 -07 42 43.8 u 807
2021-10-30 02:02:41 C 01 00 08.28 -07 43 12.3 X Y00
2021-10-30 02:25:54 C 01 00 10.17 -07 44 59.4 X Y00
2021-10-30 03:14:15 C 01 00 16.21 -07 49 12.7 X 858
2021-10-30 03:19:52 C 01 00 16.67 -07 49 38.4 X 858
2021-10-30 03:25:32 C 01 00 17.16 -07 50 04.5 X 858
2021-10-30 05:55:15 C 01 00 29.28 -08 01 31.3 V 734
2021-10-30 06:01:16 C 01 00 29.74 -08 01 59.6 V 734
2021-10-30 06:07:16 C 01 00 30.28 -08 02 26.7 V 734