IAA RAS IAA Minor Planet Database

2021 HW1

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.5753395881 ± 4.81e-04
Semi-major axis (a)2.0196559599 AU ± 2.13e-03
Inclination (i)7.30665845° ± 5.36e-03
Long. of Asc. Node (Ω)193.74244457° ± 3.06e-03
Arg. of Perihelion (ω)75.75321267° ± 3.73e-03
Mean Anomaly (M)201.12471062° ± 8.81e-01
Mean Motion (n)0.3433967519°/day ± 5.44e-04
Perihelion dist (q)0.85766793 AU ± 1.33e-03
Aphelion dist (Q)3.18164399 AU ± 3.50e-03
Orbital Period2.87022599 yr ± 4.55e-03
Physical Parameters
H (abs. magnitude)25.07
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.376″
Uncertainty3
Orbit TypeApollo
MOID0.046419 AU
Observations Used60
Oppositions1
Arc Total2021-2021
First Observation Used2021-04-18
Last Observation Used2021-04-24
Observations (60)
Date Type RA Dec Mag Band Observatory
2021-04-18 08:25:37 C 13 43 38.63 +21 42 57.1 – V G96
2021-04-18 08:32:33 C 13 43 40.91 +21 44 20.0 – V G96
2021-04-18 08:39:29 C 13 43 43.26 +21 45 42.0 – V G96
2021-04-18 08:46:25 C 13 43 45.56 +21 47 03.8 – V G96
2021-04-18 10:47:58 C 13 44 27.55 +22 11 14.3 – V I52
2021-04-18 10:51:29 C 13 44 28.82 +22 11 56.5 – V I52
2021-04-18 10:55:01 C 13 44 30.07 +22 12 38.1 – V I52
2021-04-18 20:42:57 C 13 48 37.14 +24 15 01.9 – V J95
2021-04-18 20:52:28 C 13 48 40.92 +24 17 06.8 – V J95
2021-04-18 21:01:16 C 13 48 44.47 +24 19 02.8 – V J95
2021-04-18 22:33:05 C 13 49 21.12 +24 39 08.0 – V Z99
2021-04-18 22:35:02 C 13 49 21.95 +24 39 34.0 – V Z99
2021-04-18 22:43:18 C 13 49 25.27 +24 41 23.2 – V Z99
2021-04-18 23:53:00 C 13 49 52.28 +24 56 53.5 – V 033
2021-04-18 23:54:21 C 13 49 52.81 +24 57 11.2 – V 033
2021-04-18 23:55:42 C 13 49 53.37 +24 57 29.2 – V 033
2021-04-19 02:17:11 C 13 50 52.78 +25 29 13.1 – V I93
2021-04-19 02:25:03 C 13 50 56.07 +25 30 57.5 – V I93
2021-04-19 02:31:56 C 13 50 58.96 +25 32 29.7 – V I93
2021-04-19 03:14:53 C 13 51 30.78 +25 42 20.4 – q 858
2021-04-19 03:22:58 C 13 51 34.25 +25 44 12.2 – q 858
2021-04-19 03:30:58 C 13 51 37.69 +25 46 02.5 – q 858
2021-04-19 04:41:14 C 13 52 08.65 +26 02 18.4 – V I52
2021-04-19 04:42:39 C 13 52 09.30 +26 02 37.3 – V I52
2021-04-19 04:44:04 C 13 52 09.87 +26 02 57.7 – V I52
2021-04-19 04:45:29 C 13 52 10.48 +26 03 16.6 – V I52
2021-04-19 08:40:54 C 13 53 53.42 +26 58 00.8 – V 654
2021-04-19 09:22:50 C 13 54 12.04 +27 07 50.8 – V 654
2021-04-19 10:00:14 C 13 54 28.88 +27 16 37.5 – V 654
2021-04-19 15:34:36 C 13 57 30.23 +28 37 16.5 – V N51
2021-04-19 16:00:14 C 13 57 42.80 +28 43 39.2 – V N51
2021-04-19 16:08:43 C 13 57 46.98 +28 45 46.0 – V N51
2021-04-19 19:23:48 C 13 59 31.65 +29 33 31.5 – V 033
2021-04-19 19:24:53 C 13 59 32.21 +29 33 48.0 – V 033
2021-04-19 19:25:58 C 13 59 32.78 +29 34 04.6 – V 033
2021-04-20 22:01:51 C 14 16 47.45 +36 50 56.4 – V 033
2021-04-20 22:02:47 C 14 16 48.13 +36 51 12.3 – V 033
2021-04-20 22:03:41 C 14 16 48.80 +36 51 28.7 – V 033
2021-04-20 22:04:35 C 14 16 49.47 +36 51 44.9 – V 033
2021-04-21 07:47:55 C 14 24 49.01 +39 48 28.8 – V I52
2021-04-21 07:49:33 C 14 24 50.39 +39 48 58.4 – V I52
2021-04-21 07:52:48 C 14 24 53.07 +39 49 58.7 – V I52
2021-04-22 09:11:00 C 14 52 14.58 +47 56 54.2 – V I52
2021-04-22 09:12:39 C 14 52 16.62 +47 57 26.9 – V I52
2021-04-22 09:14:17 C 14 52 18.64 +47 57 59.4 – V I52
2021-04-22 09:15:55 C 14 52 20.65 +47 58 31.2 – V I52
2021-04-22 20:54:31 C 15 09 31.83 +51 47 13.0 – V 033
2021-04-22 20:55:16 C 15 09 33.00 +51 47 27.8 – V 033
2021-04-22 20:56:01 C 15 09 34.16 +51 47 43.3 – V 033
2021-04-23 07:47:06 C 15 28 38.70 +55 20 03.1 – V I52