744281 (2009 HD21)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.6890482531 ± 9.10e-09
Semi-major axis (a)2.7670619419 AU ± 4.87e-09
Inclination (i)18.68100996° ± 5.00e-06
Long. of Asc. Node (Ω)179.04019973° ± 6.20e-06
Arg. of Perihelion (ω)134.35520172° ± 6.55e-06
Mean Anomaly (M)189.11262525° ± 3.55e-06
Mean Motion (n)0.2141331740°/day ± 5.66e-10
Perihelion dist (q)0.86042274 AU ± 2.52e-08
Aphelion dist (Q)4.67370114 AU ± 2.65e-08
Orbital Period4.60286589 yr ± 1.22e-08
Physical Parameters
H (abs. magnitude)18.24
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-01
RMS Residual0.245″
Uncertainty0
Orbit TypeApollo
MOID0.016612 AU
Observations Used197
Oppositions12
Arc Total2009-2024
First Observation Used2009-03-24
Last Observation Used2024-01-11
Observations (218)
Date Type RA Dec Mag Band Observatory
2009-03-24 09:26:19 C 13 46 06.67 -00 44 48.7 r G96
2009-03-24 09:38:07 C 13 46 06.34 -00 44 40.4 r G96
2009-03-24 09:49:46 C 13 46 06.02 -00 44 31.9 r G96
2009-03-24 10:01:31 C 13 46 05.62 -00 44 22.8 r G96
2009-04-20 07:49:49 C 13 16 53.54 +09 03 25.4 r 703
2009-04-20 08:03:22 C 13 16 52.71 +09 03 38.2 r 703
2009-04-20 08:16:50 C 13 16 51.96 +09 03 53.5 r 703
2009-04-20 08:30:19 C 13 16 51.06 +09 04 05.8 r 703
2009-04-20 09:54:58 C 13 16 45.94 +09 05 30.3 r 703
2009-04-20 10:04:55 C 13 16 45.30 +09 05 38.1 r 703
2009-04-20 10:14:57 C 13 16 44.76 +09 05 49.8 r 703
2009-04-20 10:25:01 C 13 16 44.11 +09 06 01.9 r 703
2009-04-20 21:08:50 C 13 16 07.03 +09 16 39.7 r J95
2009-04-20 21:18:06 C 13 16 06.54 +09 16 51.0 r J95
2009-04-20 23:10:53 C 13 15 59.75 +09 18 41.8 o J41
2009-04-20 23:26:35 C 13 15 58.81 +09 18 57.3 o J41
2009-04-21 05:12:40 C 13 15 38.55 +09 24 44.5 r G96
2009-04-21 05:22:26 C 13 15 37.98 +09 24 54.2 r G96
2009-04-21 05:32:11 C 13 15 37.36 +09 25 04.3 r G96
2009-04-21 05:41:54 C 13 15 36.79 +09 25 13.5 r G96
2009-04-21 06:50:54 C 13 15 32.54 +09 26 23.4 c 651
2009-04-21 06:52:59 C 13 15 32.42 +09 26 24.6 c 651
2009-04-21 07:01:22 C 13 15 31.98 +09 26 34.4 c 651
2009-04-21 07:10:29 C 13 15 31.31 +09 26 42.3 r 448
2009-04-21 07:35:46 C 13 15 29.74 +09 27 06.8 r 448
2009-04-21 08:01:39 C 13 15 28.15 +09 27 32.9 r 448
2009-04-21 23:26:09 C 13 14 33.74 +09 42 49.9 r J95
2009-04-21 23:37:22 C 13 14 33.04 +09 43 01.0 r J95
2009-04-21 23:48:36 C 13 14 32.37 +09 43 12.2 r J95
2009-04-22 07:01:33 C 13 14 06.54 +09 50 23.5 o H55
2009-04-22 07:04:14 C 13 14 06.38 +09 50 26.5 o H55
2009-04-22 07:06:55 C 13 14 06.22 +09 50 29.2 o H55
2009-04-22 21:11:39 C 13 13 16.31 +10 04 24.8 o A74
2009-04-22 21:27:02 C 13 13 15.45 +10 04 40.1 o A74
2009-04-22 21:42:25 C 13 13 14.52 +10 04 55.3 o A74
2009-04-26 08:48:40 C 13 08 15.67 +11 26 22.4 o 291
2009-04-26 08:54:08 C 13 08 15.32 +11 26 27.8 o 291
2009-04-26 08:59:28 C 13 08 14.99 +11 26 32.9 o 291
2009-04-27 08:39:18 C 13 06 49.86 +11 49 21.0 o 291
2009-04-27 08:45:13 C 13 06 49.51 +11 49 26.5 o 291
2009-04-27 08:51:13 C 13 06 49.14 +11 49 32.2 o 291
2009-05-05 02:52:01 C 12 55 54.61 +14 39 37.1 o H55
2009-05-05 02:55:54 C 12 55 54.37 +14 39 40.8 o H55
2009-05-05 03:09:02 C 12 55 53.64 +14 39 52.1 o H55
2009-05-09 02:57:47 C 12 50 37.71 +15 59 22.3 o H55
2009-05-09 03:09:19 C 12 50 37.08 +15 59 30.6 o H55
2009-05-09 03:26:47 C 12 50 36.10 +15 59 45.2 o H55
2009-05-10 03:43:36 C 12 49 19.59 +16 18 52.0 o H55
2009-05-10 03:52:16 C 12 49 19.04 +16 18 58.8 o H55
2009-05-10 03:53:57 C 12 49 18.95 +16 19 00.1 o H55