2009 HC21

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.1569611639 ± 1.45e-07
Semi-major axis (a)1.1682719966 AU ± 9.57e-09
Inclination (i)19.35329255° ± 1.71e-05
Long. of Asc. Node (Ω)213.28511899° ± 7.60e-06
Arg. of Perihelion (ω)126.90343603° ± 3.51e-05
Mean Anomaly (M)293.03725402° ± 8.08e-05
Mean Motion (n)0.7805420882°/day ± 9.59e-09
Perihelion dist (q)0.98489866 AU ± 1.70e-07
Aphelion dist (Q)1.35164533 AU ± 1.70e-07
Orbital Period1.26274585 yr ± 1.55e-08
Physical Parameters
H (abs. magnitude)22.10
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-01
RMS Residual0.321″
Uncertainty0
Orbit TypeApollo
MOID0.042764 AU
Observations Used70
Oppositions1
Arc Total2009-2014
First Observation Used2009-04-20
Last Observation Used2014-03-24
Observations (72)
Date Type RA Dec Mag Band Observatory
2009-04-20 07:40:05 C 13 41 06.03 -16 27 03.2 r G96
2009-04-20 07:50:00 C 13 41 05.38 -16 26 33.3 r G96
2009-04-20 07:59:43 C 13 41 04.70 -16 26 04.0 r G96
2009-04-20 08:09:37 C 13 41 04.05 -16 25 33.9 r G96
2009-04-20 08:20:35 C 13 41 03.26 -16 25 00.4 r G96
2009-04-20 08:21:50 C 13 41 03.22 -16 24 56.0 r G96
2009-04-20 08:34:17 C 13 41 02.28 -16 24 19.2 v H01
2009-04-20 08:41:03 C 13 41 01.81 -16 23 58.8 v H01
2009-04-20 08:47:39 C 13 41 01.39 -16 23 38.9 v H01
2009-04-20 08:55:23 C 13 41 00.87 -16 23 15.4 v H01
2009-04-20 23:44:10 C 13 40 08.91 -15 38 23.2 r J95
2009-04-20 23:46:55 C 13 40 08.68 -15 38 15.3 r J95
2009-04-20 23:53:30 C 13 40 08.25 -15 37 54.7 r J95
2009-04-21 04:46:11 C 13 39 51.94 -15 22 52.6 r G96
2009-04-21 04:50:15 C 13 39 51.66 -15 22 39.9 r G96
2009-04-21 04:54:14 C 13 39 51.40 -15 22 28.0 r G96
2009-04-21 04:58:10 C 13 39 51.15 -15 22 15.9 r G96
2009-04-21 07:16:28 C 13 39 41.81 -15 15 11.2 c 651
2009-04-21 07:18:04 C 13 39 41.68 -15 15 07.1 c 651
2009-04-21 07:19:40 C 13 39 41.54 -15 15 02.2 c 651
2009-04-22 14:09:24 C 13 37 50.69 -13 38 28.6 o 474
2009-04-22 14:11:24 C 13 37 50.55 -13 38 22.7 o 474
2009-04-22 14:13:19 C 13 37 50.42 -13 38 16.1 o 474
2009-04-22 14:15:25 C 13 37 50.28 -13 38 09.2 o 474
2009-04-23 09:18:30 C 13 36 44.49 -12 37 53.5 o 474
2009-04-23 09:21:10 C 13 36 44.33 -12 37 45.6 o 474
2009-04-23 09:23:41 C 13 36 44.14 -12 37 37.5 o 474
2009-04-23 09:26:40 C 13 36 43.93 -12 37 27.4 o 474
2009-04-23 09:29:00 C 13 36 43.81 -12 37 20.4 o 474
2009-04-23 09:30:29 C 13 36 43.70 -12 37 15.0 o 474
2009-04-27 06:33:19 C 13 31 19.23 -07 35 51.0 r G96
2009-04-27 06:41:12 C 13 31 18.73 -07 35 25.1 r G96
2009-04-27 06:56:46 C 13 31 17.72 -07 34 33.6 r G96
2009-04-27 07:33:20 C 13 31 15.35 -07 32 33.0 o 291
2009-04-27 07:39:36 C 13 31 14.94 -07 32 11.8 o 291
2009-04-27 07:44:54 C 13 31 14.59 -07 31 54.6 o 291
2009-04-28 09:33:12 C 13 29 47.76 -06 06 49.6 o 291
2009-04-28 09:38:34 C 13 29 47.47 -06 06 31.4 o 291
2009-04-28 09:43:52 C 13 29 47.12 -06 06 14.8 o 291
2009-05-03 07:11:49 C 13 23 47.50 +00 18 00.4 o 291
2009-05-03 07:17:26 C 13 23 47.20 +00 18 18.1 o 291
2009-05-03 07:23:03 C 13 23 46.92 +00 18 35.5 o 291
2009-05-03 10:44:15 C 13 23 38.42 +00 30 04.2 o 474
2009-05-03 10:46:24 C 13 23 38.29 +00 30 11.1 o 474
2009-05-03 10:48:18 C 13 23 38.19 +00 30 17.4 o 474
2009-05-03 10:50:12 C 13 23 38.07 +00 30 23.3 o 474
2009-05-13 03:52:17 C 13 15 12.36 +11 53 51.5 o 291
2009-05-13 03:57:55 C 13 15 12.17 +11 54 06.2 o 291
2009-05-13 04:03:29 C 13 15 11.98 +11 54 20.7 o 291
2009-05-21 04:09:57 C 13 12 17.87 +19 13 20.6 o H55