IAA RAS IAA Minor Planet Database

2021 US1

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.1956090180 ± 4.78e-07
Semi-major axis (a)1.2229279420 AU ± 7.94e-07
Inclination (i)1.28139600° ± 3.43e-06
Long. of Asc. Node (Ω)220.80039042° ± 3.08e-05
Arg. of Perihelion (ω)203.29276926° ± 4.98e-05
Mean Anomaly (M)342.45814629° ± 1.02e-03
Mean Motion (n)0.7288043801°/day ± 7.10e-07
Perihelion dist (q)0.98371221 AU ± 8.66e-07
Aphelion dist (Q)1.46214368 AU ± 1.12e-06
Orbital Period1.35238798 yr ± 1.32e-06
Physical Parameters
H (abs. magnitude)27.70
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.267″
Uncertainty1
Orbit TypeApollo
MOID0.001617 AU
Observations Used179
Oppositions1
Arc Total2021-2022
First Observation Used2021-10-26
Last Observation Used2022-01-08
Observations (182)
Date Type RA Dec Mag Band Observatory
2021-10-26 02:51:38 C 23 39 42.58 +12 07 41.7 – V G96
2021-10-26 02:59:49 C 23 39 44.04 +12 07 57.1 – V G96
2021-10-26 03:08:00 C 23 39 45.45 +12 08 12.3 – V G96
2021-10-26 03:16:10 C 23 39 46.86 +12 08 27.1 – V G96
2021-10-26 05:22:55 C 23 40 07.93 +12 12 05.2 – V I52
2021-10-26 05:24:44 C 23 40 08.23 +12 12 08.2 – V I52
2021-10-26 05:26:33 C 23 40 08.53 +12 12 10.8 – V I52
2021-10-27 03:30:43 C 23 47 47.15 +12 52 58.4 – V G96
2021-10-27 03:33:38 C 23 47 47.81 +12 53 04.9 – V G96
2021-10-27 03:36:33 C 23 47 48.48 +12 53 11.2 – V G96
2021-10-27 03:39:28 C 23 47 49.16 +12 53 17.4 – V G96
2021-10-27 11:44:00 C 23 50 54.13 +13 09 55.8 – r P93
2021-10-27 11:54:00 C 23 50 56.69 +13 10 18.3 – r P93
2021-10-27 19:12:31 C 23 54 05.94 +13 24 53.3 – V L01
2021-10-27 19:14:46 C 23 54 06.65 +13 24 58.4 – V L01
2021-10-27 19:16:34 C 23 54 07.21 +13 25 03.0 – V L01
2021-10-27 19:18:26 C 23 54 07.79 +13 25 08.1 – V L01
2021-10-27 19:20:15 C 23 54 15.92 +13 25 15.6 – X 958
2021-10-27 19:28:55 C 23 54 18.76 +13 25 38.2 – X 958
2021-10-27 19:37:35 C 23 54 21.53 +13 25 59.5 – X 958
2021-10-27 19:45:52 C 23 54 16.36 +13 26 08.7 – X 595
2021-10-27 19:54:05 C 23 54 18.91 +13 26 29.3 – X 595
2021-10-27 19:57:41 C 23 54 22.51 +13 26 36.1 – V 204
2021-10-27 20:03:03 C 23 54 21.70 +13 26 50.5 – X 595
2021-10-27 20:10:16 C 23 54 26.44 +13 27 06.5 – V 204
2021-10-27 20:10:54 C 23 53 49.20 +13 28 19.0 – V N51
2021-10-27 20:19:35 C 23 53 52.28 +13 28 34.7 – V N51
2021-10-27 20:22:50 C 23 54 30.37 +13 27 36.8 – V 204
2021-10-27 21:21:48 C 23 54 47.55 +13 30 12.4 – V 104
2021-10-27 21:32:40 C 23 54 50.94 +13 30 36.2 – V 104
2021-10-27 21:46:14 C 23 54 55.20 +13 31 07.1 – V 104
2021-10-28 01:48:24 C 23 57 22.73 +13 42 17.1 – o 691
2021-10-28 01:49:53 C 23 57 23.30 +13 42 21.7 – o 691
2021-10-28 01:52:51 C 23 57 24.38 +13 42 30.1 – o 691
2021-10-28 01:54:20 C 23 57 24.88 +13 42 34.3 – o 691
2021-10-28 01:57:17 C 23 57 25.94 +13 42 42.8 – o 691
2021-10-28 02:00:15 C 23 57 27.00 +13 42 51.5 – o 691
2021-10-28 04:06:46 C 23 58 08.49 +13 48 36.3 – V 703
2021-10-28 04:14:21 C 23 58 10.93 +13 48 54.7 – V 703
2021-10-28 04:21:55 C 23 58 13.30 +13 49 16.9 – V 703
2021-10-28 04:29:28 C 23 58 15.65 +13 49 36.4 – V 703
2021-10-28 04:57:12 C 23 58 24.54 +13 50 46.7 – V I52
2021-10-28 05:00:22 C 23 58 25.55 +13 50 54.2 – V I52
2021-10-28 05:00:43 C 23 58 25.65 +13 50 55.4 – V I52
2021-10-28 05:03:16 C 23 58 26.46 +13 51 01.9 – V I52
2021-10-28 08:14:53 C 23 59 32.61 +13 58 26.1 – V I52
2021-10-28 08:15:14 C 23 59 32.82 +13 58 26.3 – V I52
2021-10-28 08:15:35 C 23 59 33.00 +13 58 26.9 – V I52
2021-10-28 08:19:13 C 23 59 34.43 +13 58 35.0 – V I52
2021-10-28 18:03:37 C 00 05 37.97 +14 22 32.9 – V 246