2021 HD2

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.5322497865 ± 1.67e-04
Semi-major axis (a)2.1491532623 AU ± 7.35e-04
Inclination (i)1.23049320° ± 3.18e-04
Long. of Asc. Node (Ω)175.60657464° ± 9.33e-04
Arg. of Perihelion (ω)49.62314993° ± 1.36e-03
Mean Anomaly (M)159.92091946° ± 2.70e-01
Mean Motion (n)0.3128320172°/day ± 1.61e-04
Perihelion dist (q)1.00526690 AU ± 4.98e-04
Aphelion dist (Q)3.29303963 AU ± 1.18e-03
Orbital Period3.15065668 yr ± 1.62e-03
Physical Parameters
H (abs. magnitude)27.09
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.259″
Uncertainty3
Orbit TypeApollo
MOID0.014360 AU
Observations Used32
Oppositions1
Arc Total2021-2021
First Observation Used2021-04-19
Last Observation Used2021-04-23
Observations (32)
Date Type RA Dec Mag Band Observatory
2021-04-19 08:45:21 C 14 48 32.73 +16 12 17.1 V G96
2021-04-19 08:53:45 C 14 48 46.58 +16 12 11.3 V G96
2021-04-19 09:02:06 C 14 49 00.46 +16 12 05.6 V G96
2021-04-19 13:22:36 C 14 56 33.421 +16 09 46.70 U F51
2021-04-19 13:42:37 C 14 57 07.407 +16 09 23.91 U F51
2021-04-19 14:22:43 C 14 58 15.988 +16 08 35.47 U F51
2021-04-19 21:36:06 C 15 11 54.68 +15 56 48.6 V 033
2021-04-19 21:36:51 C 15 11 56.03 +15 56 47.7 V 033
2021-04-19 21:37:35 C 15 11 57.37 +15 56 47.0 V 033
2021-04-19 21:38:20 C 15 11 58.69 +15 56 45.9 V 033
2021-04-19 21:39:04 C 15 12 00.05 +15 56 44.8 V 033
2021-04-19 23:27:31 C 15 15 18.29 +15 54 06.3 V J95
2021-04-19 23:48:46 C 15 15 56.67 +15 53 35.4 V J95
2021-04-20 06:04:21 C 15 27 53.12 +15 43 47.2 V I52
2021-04-20 06:05:58 C 15 27 56.13 +15 43 44.4 V I52
2021-04-20 06:07:36 C 15 27 59.12 +15 43 41.4 V I52
2021-04-20 14:47:40 C 15 44 06.966 +15 24 47.36 V 568
2021-04-20 14:49:49 C 15 44 10.946 +15 24 41.17 V 568
2021-04-20 14:51:13 C 15 44 13.555 +15 24 37.11 V 568
2021-04-20 23:40:24 C 16 01 47.08 +14 55 28.0 V 033
2021-04-20 23:41:09 C 16 01 48.46 +14 55 25.7 V 033
2021-04-20 23:41:53 C 16 01 49.89 +14 55 23.5 V 033
2021-04-20 23:42:38 C 16 01 51.28 +14 55 21.3 V 033
2021-04-22 11:34:27 C 17 09 44.19 +12 24 39.6 V I52
2021-04-22 11:39:19 C 17 09 52.49 +12 24 15.0 V I52
2021-04-23 01:57:16 C 17 34 44.98 +11 09 05.4 V 033
2021-04-23 01:58:00 C 17 34 46.14 +11 09 01.6 V 033
2021-04-23 01:58:45 C 17 34 47.31 +11 08 57.7 V 033
2021-04-23 01:59:30 C 17 34 48.51 +11 08 53.7 V 033
2021-04-23 02:00:16 C 17 34 49.73 +11 08 49.8 V 033
2021-04-23 09:51:24 C 17 47 35.86 +10 29 17.6 V I52
2021-04-23 09:56:18 C 17 47 43.20 +10 28 52.7 V I52