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
2012-05-17 04:51:53 C 15 50 32.53 -07 27 51.9 o 291
2012-05-17 04:53:28 C 15 50 32.42 -07 27 53.2 o 291
2012-05-17 04:55:03 C 15 50 32.17 -07 27 53.7 o 291
2012-05-22 08:53:19 C 15 36 54.40 -08 40 14.4 o 291
2012-05-22 08:55:07 C 15 36 54.19 -08 40 15.4 o 291
2012-05-22 08:56:56 C 15 36 53.98 -08 40 16.4 o 291
2012-05-27 08:47:01 C 15 25 53.78 -09 47 29.8 o 291
2012-05-27 08:49:24 C 15 25 53.55 -09 47 31.2 o 291
2012-05-27 08:51:45 C 15 25 53.33 -09 47 32.7 o 291
2012-05-28 08:14:59 C 15 24 00.45 -10 00 19.0 o 291
2012-05-28 08:18:48 C 15 24 00.11 -10 00 21.4 o 291
2012-05-28 08:22:37 C 15 23 59.79 -10 00 23.2 o 291
2012-06-10 07:31:28 C 15 06 52.20 -12 39 37.0 o 291
2012-06-10 07:35:50 C 15 06 52.01 -12 39 39.2 o 291
2012-06-10 07:40:13 C 15 06 51.83 -12 39 41.2 o 291
2012-06-14 05:35:40 C 15 04 22.00 -13 24 15.9 o 695
2012-06-14 05:45:31 C 15 04 21.73 -13 24 20.4 o 695
2012-06-14 06:08:36 C 15 04 21.12 -13 24 31.5 o 695
2012-06-25 05:10:52 C 15 02 50.99 -15 22 56.8 o 291
2012-06-25 05:30:19 C 15 02 51.01 -15 23 06.8 o 291
2016-06-07 13:26:08 C 21 07 11.268 -18 43 48.67 t 568
2016-06-07 13:35:00 C 21 07 11.266 -18 43 51.10 t 568
2016-06-07 13:40:23 C 21 07 11.269 -18 43 52.67 t 568
2016-06-07 13:46:07 C 21 07 11.258 -18 43 54.21 t 568
2016-06-08 12:53:27 C 21 07 14.650 -18 50 21.66 t 568
2016-06-08 12:58:54 C 21 07 14.631 -18 50 23.26 t 568
2016-06-08 13:04:31 C 21 07 14.621 -18 50 24.90 t 568
2016-06-08 13:10:48 C 21 07 14.605 -18 50 26.77 t 568
2016-06-08 13:16:22 C 21 07 14.587 -18 50 28.28 t 568
2020-08-26 11:09:10 C 00 52 51.80 -10 52 48.0 V V06
2020-08-26 11:13:43 C 00 52 51.72 -10 52 51.5 V V06
2020-08-26 11:18:17 C 00 52 51.65 -10 52 55.0 V V06
2020-08-26 11:30:28 C 00 52 51.58 -10 53 02.8 V V06
2020-09-09 10:55:16 C 00 45 34.162 -15 36 14.12 U F51
2020-09-09 11:11:43 C 00 45 33.314 -15 36 30.57 U F51
2020-09-09 11:28:11 C 00 45 32.485 -15 36 47.04 U F51
2020-09-09 11:44:42 C 00 45 31.627 -15 37 03.47 U F51
2020-09-14 10:28:50 C 00 39 20.757 -17 39 12.94 U F51
2020-09-14 10:45:13 C 00 39 19.636 -17 39 30.49 U F51
2020-09-14 11:01:35 C 00 39 18.512 -17 39 47.95 U F51
2020-09-17 10:33:06 C 00 34 35.164 -18 56 42.41 U F52
2020-09-17 10:53:39 C 00 34 33.523 -18 57 04.97 U F52
2020-09-17 11:14:14 C 00 34 31.887 -18 57 27.26 U F52
2020-09-23 10:06:36 C 00 22 55.878 -21 32 40.15 U F52
2020-09-23 10:21:26 C 00 22 54.398 -21 32 56.19 U F52
2020-09-23 10:36:17 C 00 22 52.909 -21 33 12.05 U F52
2020-09-23 10:51:06 C 00 22 51.434 -21 33 27.97 U F52
2020-09-25 06:30:47 C 00 18 47.45 -22 19 56.6 V G96
2020-09-25 06:37:42 C 00 18 46.69 -22 20 04.9 V G96
2020-09-25 06:44:37 C 00 18 45.95 -22 20 12.1 V G96