IAA RAS IAA Minor Planet Database

2021 HD3

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.3901425000
Semi-major axis (a)1.6430911000 AU
Inclination (i)9.36031000°
Long. of Asc. Node (Ω)55.13505000°
Arg. of Perihelion (ω)209.81057000°
Mean Anomaly (M)38.70580000°
Mean Motion (n)0.4679631000°/day
Perihelion dist (q)1.00205140 AU
Aphelion dist (Q)2.28413080 AU
Orbital Period2.10616540 yr
Physical Parameters
H (abs. magnitude)24.47
G (slope)0.15
Orbit Solution
SourceMPC
Solution Date—
RMS Residual0.860″
Uncertainty6
Orbit TypeAmor
MOID0.021423 AU
Observations Used55
Oppositions1
Arc Total—
First Observation Used—
Last Observation Used2021-05-23
Observations (58)
Date Type RA Dec Mag Band Observatory
2021-04-30 06:46:22 C 13 31 56.520 +20 26 25.09 – U F51
2021-04-30 07:05:54 C 13 31 54.783 +20 26 09.63 – U F51
2021-04-30 07:25:24 C 13 31 53.027 +20 25 54.54 – U F51
2021-05-01 02:40:23 C 13 30 27.77 +20 08 24.1 – u H21
2021-05-01 02:51:41 C 13 30 26.72 +20 08 14.1 – u H21
2021-05-01 02:55:35 C 13 30 26.35 +20 08 10.8 – u H21
2021-05-01 03:31:26 C 13 30 23.53 +20 07 37.7 – V H36
2021-05-01 03:51:18 C 13 30 21.74 +20 07 20.0 – V H36
2021-05-01 04:37:30 C 13 30 18.68 +20 06 43.5 – V I52
2021-05-01 04:48:53 C 13 30 17.60 +20 06 33.3 – V I52
2021-05-01 04:58:16 C 13 30 16.71 +20 06 24.9 – V I52
2021-05-01 09:21:23 C 13 29 51.68 +20 02 03.5 – V H01
2021-05-01 09:29:40 C 13 29 50.94 +20 01 54.9 – V H01
2021-05-01 09:42:53 C 13 29 49.78 +20 01 40.9 – V H01
2021-05-01 09:51:56 C 13 29 48.97 +20 01 31.3 – V H01
2021-05-02 09:09:56 C 13 27 59.32 +19 37 22.8 – V I52
2021-05-02 09:14:50 C 13 27 58.79 +19 37 17.1 – V I52
2021-05-02 09:19:44 C 13 27 58.32 +19 37 11.9 – V I52
2021-05-05 07:33:52 C 13 21 45.64 +18 03 10.4 – V I52
2021-05-05 07:35:41 C 13 21 45.42 +18 03 07.6 – V I52
2021-05-05 07:37:29 C 13 21 45.18 +18 03 05.1 – V I52
2021-05-05 07:39:18 C 13 21 44.99 +18 03 01.4 – V I52
2021-05-06 07:15:38 C 13 19 23.05 +17 22 52.4 – V G96
2021-05-06 07:23:03 C 13 19 22.08 +17 22 38.2 – V G96
2021-05-06 07:30:28 C 13 19 21.17 +17 22 24.9 – V G96
2021-05-06 07:37:52 C 13 19 20.25 +17 22 11.1 – V G96
2021-05-07 03:33:24 C 13 17 18.29 +16 44 08.9 – V I52
2021-05-07 03:34:30 C 13 17 18.06 +16 44 07.9 – V I52
2021-05-07 03:35:37 C 13 17 17.84 +16 44 05.5 – V I52
2021-05-07 03:36:43 C 13 17 17.74 +16 44 02.8 – V I52
2021-05-09 04:33:38 C 13 11 27.90 +14 52 08.9 – V I52
2021-05-09 04:35:51 C 13 11 27.49 +14 52 02.4 – V I52
2021-05-09 04:36:57 C 13 11 27.33 +14 51 59.8 – V I52
2021-05-10 07:42:54 C 13 07 44.13 +13 36 18.5 – V I52
2021-05-10 07:44:01 C 13 07 43.97 +13 36 15.3 – V I52
2021-05-10 07:45:07 C 13 07 43.78 +13 36 11.2 – V I52
2021-05-10 07:46:13 C 13 07 43.59 +13 36 07.9 – V I52
2021-05-11 09:18:41 C 13 04 00.460 +12 14 25.96 – U F51
2021-05-11 09:37:17 C 13 03 56.961 +12 13 20.91 – U F51
2021-05-12 09:47:48 C 12 59 58.92 +10 43 21.8 – V I52
2021-05-12 09:48:25 C 12 59 58.82 +10 43 19.1 – V I52
2021-05-12 09:49:01 C 12 59 58.66 +10 43 17.4 – V I52
2021-05-12 09:49:37 C 12 59 58.56 +10 43 14.2 – V I52
2021-05-15 06:30:11 C 12 46 34.52 +05 10 04.9 – V I52
2021-05-15 06:32:50 C 12 46 33.90 +05 09 49.8 – V I52
2021-05-15 06:35:29 C 12 46 33.17 +05 09 34.3 – V I52
2021-05-15 06:38:08 C 12 46 32.49 +05 09 18.9 – V I52
2021-05-19 04:41:12 C 12 18 44.72 -07 24 23.2 – V I52
2021-05-19 04:41:48 C 12 18 44.45 -07 24 29.4 – V I52
2021-05-19 04:42:25 C 12 18 44.20 -07 24 35.6 – V I52