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
2012-04-24 09:49:02 C 17 03 01.44 -02 08 51.7 r G96
2012-04-24 10:01:36 C 17 02 59.67 -02 08 58.5 r G96
2012-04-24 10:14:19 C 17 02 57.94 -02 09 05.1 r G96
2012-04-24 10:26:50 C 17 02 56.18 -02 09 11.6 r G96
2012-04-24 11:09:16 C 17 02 50.32 -02 09 33.8 r G96
2012-04-24 11:13:04 C 17 02 49.80 -02 09 35.8 r G96
2012-04-25 08:51:57 C 17 00 04.32 -02 21 00.0 r G96
2012-04-25 09:02:03 C 17 00 02.91 -02 21 05.2 r G96
2012-04-25 09:12:12 C 17 00 01.47 -02 21 10.6 r G96
2012-04-25 09:22:20 C 17 00 00.03 -02 21 15.6 r G96
2012-04-26 09:04:41 C 16 56 54.02 -02 34 01.1 u H36
2012-04-26 09:21:33 C 16 56 51.73 -02 34 10.2 u H36
2012-04-26 09:30:40 C 16 56 50.42 -02 34 15.4 u H36
2012-04-30 07:44:24 C 16 44 13.10 -03 26 30.9 o 291
2012-04-30 07:45:54 C 16 44 12.88 -03 26 31.8 o 291
2012-04-30 08:28:45 C 16 44 06.40 -03 26 56.4 u 448
2012-04-30 09:04:11 C 16 44 01.18 -03 27 16.3 u 448
2012-04-30 09:32:36 C 16 43 56.97 -03 27 35.3 u 448
2012-05-01 06:09:06 C 16 41 09.76 -03 39 21.1 o 291
2012-05-01 06:10:31 C 16 41 09.52 -03 39 22.1 o 291
2012-05-01 06:11:57 C 16 41 09.35 -03 39 22.9 o 291
2012-05-02 06:44:06 C 16 37 45.67 -03 53 40.0 o H21
2012-05-02 06:50:07 C 16 37 44.79 -03 53 43.3 o H21
2012-05-02 06:58:04 C 16 37 43.62 -03 53 48.1 o H21
2012-05-03 08:31:08 C 16 34 11.22 -04 08 44.6 o H21
2012-05-03 08:36:23 C 16 34 10.44 -04 08 47.7 o H21
2012-05-03 08:41:37 C 16 34 09.68 -04 08 50.7 o H21
2012-05-04 06:57:37 C 16 31 05.50 -04 21 11.5 o 807
2012-05-04 07:14:57 C 16 31 02.93 -04 21 21.9 o 807
2012-05-10 01:37:55 C 16 12 10.36 -05 45 10.7 t 204
2012-05-10 02:14:13 C 16 12 05.23 -05 45 32.1 t 204
2012-05-10 07:47:38 C 16 11 21.12 -05 48 50.0 o H21
2012-05-10 07:54:53 C 16 11 20.08 -05 48 54.7 o H21
2012-05-10 08:00:00 C 16 11 19.36 -05 48 57.7 o H21
2012-05-11 07:02:45 C 16 08 16.77 -06 02 53.2 u H21
2012-05-11 07:12:53 C 16 08 15.36 -06 02 59.6 u H21
2012-05-11 07:16:46 C 16 08 14.81 -06 03 02.2 u H21
2012-05-11 09:24:31 C 16 07 57.65 -06 04 15.2 o 291
2012-05-11 09:26:44 C 16 07 57.32 -06 04 16.4 o 291
2012-05-11 09:28:57 C 16 07 57.04 -06 04 17.6 o 291
2012-05-12 09:08:57 C 16 04 51.85 -06 18 34.5 r G96
2012-05-12 09:18:52 C 16 04 50.44 -06 18 40.6 r G96
2012-05-12 09:28:53 C 16 04 49.08 -06 18 46.6 r G96
2012-05-12 09:38:53 C 16 04 47.67 -06 18 52.5 r G96
2012-05-16 07:34:48 C 15 53 03.01 -07 15 15.9 u 448
2012-05-16 08:05:38 C 15 52 59.06 -07 15 32.8 u 448
2012-05-16 08:36:18 C 15 52 55.18 -07 15 50.6 u 448
2012-05-16 09:01:46 C 15 52 51.99 -07 16 05.6 r G96
2012-05-16 09:06:56 C 15 52 51.31 -07 16 09.0 r G96
2012-05-16 09:17:17 C 15 52 50.01 -07 16 15.0 r G96