2012 HD20

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.2716020909 ± 2.32e-08
Semi-major axis (a)1.1811336472 AU ± 1.48e-09
Inclination (i)4.69232417° ± 2.75e-06
Long. of Asc. Node (Ω)87.05055941° ± 3.48e-05
Arg. of Perihelion (ω)32.10128598° ± 4.68e-05
Mean Anomaly (M)277.28775425° ± 2.32e-05
Mean Motion (n)0.7678275909°/day ± 1.44e-09
Perihelion dist (q)0.86033528 AU ± 2.75e-08
Aphelion dist (Q)1.50193202 AU ± 2.75e-08
Orbital Period1.28365573 yr ± 2.42e-09
Physical Parameters
H (abs. magnitude)22.20
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-01
RMS Residual0.229″
Uncertainty0
Orbit TypeApollo
MOID0.044090 AU
Observations Used123
Oppositions2
Arc Total2012-2021
First Observation Used2012-04-24
Last Observation Used2021-06-14
Observations (131)
Date Type RA Dec Mag Band Observatory
2020-09-25 06:51:33 C 00 18 45.21 -22 20 19.1 V G96
2020-10-16 07:35:28 C 23 22 27.923 -28 40 24.65 U F51
2020-10-16 07:36:23 C 23 22 27.811 -28 40 24.86 U F51
2020-10-16 07:49:22 C 23 22 26.220 -28 40 29.65 U F51
2020-10-16 08:04:15 C 23 22 24.397 -28 40 34.77 U F51
2020-10-16 08:17:13 C 23 22 22.816 -28 40 39.04 U F51
2020-10-16 08:18:08 C 23 22 22.696 -28 40 39.42 U F51
2020-11-25 03:08:21 C 22 22 39.69 -24 13 31.6 o 691
2020-11-25 03:44:23 C 22 22 38.34 -24 13 06.1 o 691
2021-05-19 12:46:32 C 16 50 54.180 -13 04 03.72 U F51
2021-05-19 13:03:39 C 16 50 51.908 -13 04 10.63 U F51
2021-05-19 13:37:53 C 16 50 47.351 -13 04 24.45 U F51
2021-05-20 08:36:42 C 16 48 26.06 -13 12 24.2 o 691
2021-05-20 08:45:36 C 16 48 24.93 -13 12 28.3 o 691
2021-05-20 08:54:16 C 16 48 23.75 -13 12 31.9 o 691
2021-05-29 08:00:54 C 16 22 39.26 -14 39 06.5 o 691
2021-05-29 08:13:29 C 16 22 37.77 -14 39 10.9 o 691
2021-05-29 08:26:05 C 16 22 36.27 -14 39 16.2 o 691
2021-05-31 08:14:16 C 16 17 23.04 -14 57 25.2 o 691
2021-05-31 08:42:16 C 16 17 19.89 -14 57 34.8 o 691
2021-06-02 09:57:21 C 16 12 13.870 -15 15 45.24 U F51
2021-06-02 10:02:06 C 16 12 13.362 -15 15 46.83 U F51
2021-06-02 10:19:24 C 16 12 11.477 -15 15 53.27 U F51
2021-06-02 10:31:54 C 16 12 10.128 -15 15 57.93 U F51
2021-06-02 10:53:58 C 16 12 07.727 -15 16 05.73 U F51
2021-06-09 08:12:10 C 15 57 18.126 -16 13 58.03 U F51
2021-06-09 08:28:01 C 15 57 16.779 -16 14 03.93 U F51
2021-06-09 08:43:52 C 15 57 15.446 -16 14 08.91 U F51
2021-06-14 06:54:51 C 15 49 03.670 -16 53 00.18 U F51
2021-06-14 07:11:02 C 15 49 02.592 -16 53 05.67 U F51
2021-06-14 07:27:11 C 15 49 01.522 -16 53 11.15 U F51