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
2009-05-12 03:37:35 C 12 46 53.34 +16 55 14.9 o H55
2009-05-12 03:43:09 C 12 46 53.06 +16 55 19.3 o H55
2009-05-12 03:44:49 C 12 46 52.98 +16 55 20.8 o H55
2009-05-17 04:19:00 C 12 41 17.44 +18 18 58.3 o H55
2009-05-17 04:26:36 C 12 41 17.04 +18 19 02.5 o H55
2009-05-17 04:34:01 C 12 41 16.65 +18 19 06.8 o H55
2009-05-21 05:04:36 C 12 37 27.13 +19 17 31.8 r H45
2009-05-21 05:08:37 C 12 37 27.03 +19 17 33.3 r H45
2009-05-21 05:10:39 C 12 37 26.95 +19 17 33.5 r H45
2009-05-21 05:12:28 C 12 37 26.83 +19 17 35.7 r H45
2009-05-21 05:14:28 C 12 37 26.82 +19 17 36.4 r H45
2009-05-21 05:16:18 C 12 37 26.67 +19 17 36.5 r H45
2009-05-22 21:47:47 C 12 36 01.98 +19 39 49.0 c 587
2009-05-22 21:53:29 C 12 36 01.81 +19 39 52.3 c 587
2009-05-22 21:59:04 C 12 36 01.62 +19 39 55.7 c 587
2009-05-22 22:04:22 C 12 36 01.44 +19 39 57.7 c 587
2009-06-05 02:26:25 C 12 29 20.27 +21 49 31.1 o H55
2009-06-05 02:35:10 C 12 29 20.19 +21 49 34.0 o H55
2009-06-05 02:43:59 C 12 29 20.08 +21 49 37.0 o H55
2009-07-07 02:30:22 C 12 45 00.64 +23 06 10.9 o H55
2009-07-07 02:43:31 C 12 45 01.18 +23 06 09.8 o H55
2009-07-08 21:35:14 C 12 47 04.09 +23 03 58.5 c 587
2009-07-08 21:43:57 C 12 47 04.52 +23 03 58.7 c 587
2009-07-20 21:23:42 C 13 03 21.17 +22 38 34.1 c 587
2009-07-20 21:28:49 C 13 03 21.52 +22 38 34.0 c 587
2009-07-20 21:34:04 C 13 03 21.82 +22 38 33.4 c 587
2009-09-27 09:18:31 C 16 59 26.23 -30 51 14.8 r E12
2009-09-27 09:21:10 C 16 59 28.73 -30 52 00.9 r E12
2009-09-28 09:25:32 C 17 33 04.59 -38 29 38.2 r E12
2009-09-28 09:27:28 C 17 33 07.60 -38 30 14.6 r E12
2009-09-29 09:57:09 C 18 17 53.884 -45 54 03.33 r E12
2009-09-29 09:59:10 C 18 17 57.95 -45 54 36.7 r E12
2009-09-29 10:01:30 C 18 18 02.70 -45 55 15.6 r E12
2009-09-30 08:52:15 C 19 10 17.88 -51 31 17.1 r 432
2009-09-30 09:03:06 C 19 10 44.12 -51 33 29.6 r 432
2009-09-30 09:19:09 C 19 11 23.987 -51 36 43.23 r E12
2009-09-30 09:21:23 C 19 11 29.395 -51 37 10.21 r E12
2009-09-30 09:23:29 C 19 11 34.526 -51 37 35.76 r E12
2009-10-01 08:46:03 C 20 12 24.06 -55 14 02.0 r 432
2009-10-01 08:56:52 C 20 12 52.15 -55 15 10.4 r 432
2009-10-01 09:07:42 C 20 13 20.28 -55 16 18.4 r 432
2009-10-01 10:37:43 C 20 17 14.95 -55 25 14.4 r E12
2009-10-01 10:39:47 C 20 17 20.33 -55 25 26.3 r E12
2009-10-04 02:45:10 C 22 41 22.68 -55 11 46.2 834
2009-10-04 02:57:40 C 22 41 42.89 -55 10 54.8 834
2009-10-04 03:28:09 C 22 42 32.19 -55 08 48.2 834
2009-10-07 09:19:33 C 00 08 05.219 -49 02 58.28 r E12
2009-10-07 09:21:39 C 00 08 06.632 -49 02 49.05 r E12
2009-10-08 09:08:30 C 00 22 47.702 -47 19 50.40 r E12
2009-10-08 09:10:56 C 00 22 49.014 -47 19 40.80 r E12