IAA RAS IAA Minor Planet Database

2021 HD1

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.3399057000
Semi-major axis (a)1.5624485000 AU
Inclination (i)1.68620000°
Long. of Asc. Node (Ω)69.09414000°
Arg. of Perihelion (ω)126.75685000°
Mean Anomaly (M)131.86158000°
Mean Motion (n)0.5046560600°/day
Perihelion dist (q)1.03136330 AU
Aphelion dist (Q)2.09353370 AU
Orbital Period1.95302840 yr
Physical Parameters
H (abs. magnitude)26.80
G (slope)0.15
Orbit Solution
SourceMPC
Solution Date—
RMS Residual0.750″
Uncertainty7
Orbit TypeAmor
MOID0.037345 AU
Observations Used41
Oppositions1
Arc Total—
First Observation Used—
Last Observation Used2021-05-07
Observations (44)
Date Type RA Dec Mag Band Observatory
2021-04-18 08:25:37 C 13 51 40.87 +21 47 45.1 – V G96
2021-04-18 08:32:33 C 13 51 44.23 +21 47 05.1 – V G96
2021-04-18 08:39:29 C 13 51 47.55 +21 46 25.1 – V G96
2021-04-18 08:46:25 C 13 51 50.86 +21 45 45.5 – V G96
2021-04-18 10:27:56 C 13 52 40.10 +21 35 54.0 – V I52
2021-04-18 10:35:13 C 13 52 43.68 +21 35 11.3 – V I52
2021-04-18 10:42:30 C 13 52 47.24 +21 34 28.2 – V I52
2021-04-19 00:10:20 C 14 00 01.55 +20 16 47.3 – V 033
2021-04-19 00:12:04 C 14 00 02.39 +20 16 37.2 – V 033
2021-04-19 00:13:49 C 14 00 03.20 +20 16 27.4 – V 033
2021-04-19 02:12:27 C 14 01 02.27 +20 04 58.2 – V J95
2021-04-19 02:22:06 C 14 01 06.92 +20 04 01.6 – V J95
2021-04-19 02:32:17 C 14 01 11.87 +20 03 01.7 – V J95
2021-04-19 05:11:59 C 14 02 47.92 +19 48 45.3 – V I52
2021-04-19 05:16:49 C 14 02 50.17 +19 48 17.5 – V I52
2021-04-19 05:19:14 C 14 02 51.34 +19 48 04.6 – V I52
2021-04-20 23:17:32 C 14 23 30.71 +15 43 10.0 – V 033
2021-04-20 23:19:26 C 14 23 31.52 +15 42 59.0 – V 033
2021-04-20 23:21:21 C 14 23 32.36 +15 42 48.0 – V 033
2021-04-21 07:55:21 C 14 27 31.88 +14 54 06.2 – V I52
2021-04-21 07:57:46 C 14 27 32.89 +14 53 51.8 – V I52
2021-04-21 08:00:11 C 14 27 33.88 +14 53 38.0 – V I52
2021-04-21 08:02:36 C 14 27 34.88 +14 53 23.7 – V I52
2021-04-22 08:41:08 C 14 38 37.71 +12 31 37.2 – V I52
2021-04-22 08:44:46 C 14 38 39.16 +12 31 16.5 – V I52
2021-04-22 21:54:00 C 14 44 24.21 +11 15 49.7 – V 033
2021-04-22 21:56:05 C 14 44 25.01 +11 15 38.2 – V 033
2021-04-22 21:58:09 C 14 44 25.81 +11 15 26.8 – V 033
2021-04-22 22:00:14 C 14 44 26.60 +11 15 15.3 – V 033
2021-04-23 23:46:41 C 14 54 51.89 +08 53 01.2 – V 033
2021-04-23 23:49:13 C 14 54 52.78 +08 52 47.5 – V 033
2021-04-23 23:53:38 C 14 54 54.34 +08 52 24.1 – V 033
2021-04-24 09:48:06 C 14 58 39.51 +08 00 00.8 – V I52
2021-04-24 09:50:31 C 14 58 40.40 +07 59 49.4 – V I52
2021-04-24 09:55:54 C 14 58 42.18 +07 59 19.3 – V I52
2021-04-24 09:58:19 C 14 58 42.91 +07 59 06.7 – V I52
2021-04-25 09:30:54 C 15 07 25.83 +05 56 19.2 – V I52
2021-04-25 09:33:19 C 15 07 26.62 +05 56 06.2 – V I52
2021-04-25 09:35:44 C 15 07 27.36 +05 55 54.3 – V I52
2021-05-06 07:41:11 C 16 11 13.83 -10 18 47.5 – o 691
2021-05-06 07:58:16 C 16 11 15.87 -10 19 31.2 – o 691
2021-05-06 08:15:24 C 16 11 17.87 -10 20 14.0 – o 691
2021-05-07 07:00:20 C 16 14 40.93 -11 15 22.1 – o 691
2021-05-07 07:21:07 C 16 14 43.25 -11 16 10.5 – o 691