2021 HD

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.3274279157 ± 1.40e-04
Semi-major axis (a)0.9137232014 AU ± 2.02e-05
Inclination (i)14.07785777° ± 7.75e-03
Long. of Asc. Node (Ω)208.36373605° ± 5.84e-04
Arg. of Perihelion (ω)127.63993577° ± 3.35e-03
Mean Anomaly (M)358.24315099° ± 4.22e-02
Mean Motion (n)1.1284707252°/day ± 3.74e-05
Perihelion dist (q)0.61454472 AU ± 1.29e-04
Aphelion dist (Q)1.21290168 AU ± 1.31e-04
Orbital Period0.87341768 yr ± 2.89e-05
Physical Parameters
H (abs. magnitude)26.27
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.365″
Uncertainty2
Orbit TypeAten
MOID0.008727 AU
Observations Used22
Oppositions1
Arc Total2021-2021
First Observation Used2021-04-16
Last Observation Used2021-04-20
Observations (22)
Date Type RA Dec Mag Band Observatory
2021-04-16 07:39:42 C 11 43 44.950 -20 22 30.28 U F51
2021-04-16 07:55:50 C 11 43 31.649 -20 18 37.00 U F51
2021-04-16 08:28:08 C 11 43 04.940 -20 10 47.91 U F51
2021-04-16 13:05:55 C 11 39 23.08 -18 57 01.2 V 474
2021-04-16 13:09:43 C 11 39 20.01 -18 56 01.9 V 474
2021-04-16 13:11:36 C 11 39 18.38 -18 55 33.3 V 474
2021-04-16 13:13:29 C 11 39 16.83 -18 55 03.8 V 474
2021-04-16 20:24:31 C 11 33 42.61 -17 05 35.1 V I93
2021-04-16 20:44:40 C 11 33 24.98 -17 00 00.5 V I93
2021-04-17 03:30:29 C 11 27 44.62 -15 02 26.1 V I52
2021-04-17 03:33:13 C 11 27 42.10 -15 01 37.0 V I52
2021-04-17 03:35:56 C 11 27 39.57 -15 00 48.4 V I52
2021-04-17 07:46:43 C 11 24 01.54 -13 38 41.2 V 474
2021-04-17 07:47:50 C 11 24 00.53 -13 38 20.1 V 474
2021-04-17 07:48:57 C 11 23 59.53 -13 37 59.4 V 474
2021-04-17 07:50:03 C 11 23 58.44 -13 37 38.2 V 474
2021-04-19 19:35:44 C 10 18 51.59 +10 24 15.0 V 033
2021-04-19 19:36:19 C 10 18 50.82 +10 24 31.2 V 033
2021-04-19 19:36:54 C 10 18 50.03 +10 24 47.8 V 033
2021-04-20 03:19:21 C 10 08 40.78 +14 05 40.2 V I52
2021-04-20 03:21:37 C 10 08 37.54 +14 06 44.5 V I52
2021-04-20 03:23:54 C 10 08 34.27 +14 07 50.4 V I52