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
2009-10-09 09:10:40 C 00 34 37.837 -45 45 09.57 r E12
2009-10-09 09:12:43 C 00 34 38.701 -45 45 02.18 r E12
2009-10-11 14:42:04 C 00 53 38.387 -42 46 04.64 r E12
2009-10-11 15:00:37 C 00 53 43.380 -42 45 08.38 r E12
2009-10-11 15:19:11 C 00 53 48.369 -42 44 11.83 r E12
2009-10-11 15:37:47 C 00 53 53.375 -42 43 15.16 r E12
2009-10-17 13:15:38 C 01 20 24.433 -37 15 21.36 r E12
2009-10-17 13:31:37 C 01 20 26.169 -37 14 52.36 r E12
2009-10-17 13:47:24 C 01 20 27.877 -37 14 23.76 r E12
2009-10-17 14:03:14 C 01 20 29.593 -37 13 55.07 r E12
2009-10-19 13:08:16 C 01 25 35.162 -35 53 47.19 r E12
2009-10-19 13:11:36 C 01 25 35.447 -35 53 41.93 r E12
2009-10-22 09:33:25 C 01 31 20.16 -34 12 16.7 r E12
2009-10-22 09:36:42 C 01 31 20.38 -34 12 12.4 r E12
2009-10-24 16:13:47 C 01 34 52.37 -33 00 44.5 r E12
2009-10-24 16:17:09 C 01 34 52.55 -33 00 40.3 r E12
2009-10-28 03:28:29 C 01 39 15.28 -31 23 04.7 c 808
2009-10-28 03:38:59 C 01 39 15.71 -31 22 51.3 c 808
2009-10-28 03:49:29 C 01 39 16.23 -31 22 38.9 c 808
2009-10-30 03:11:30 C 01 41 19.68 -30 31 35.8 c 808
2009-10-30 03:21:29 C 01 41 19.94 -30 31 23.9 c 808
2009-10-30 03:31:59 C 01 41 20.41 -30 31 12.6 c 808
2009-10-30 15:53:06 C 01 41 49.11 -30 18 16.8 r E12
2009-11-09 12:51:02 C 01 49 30.89 -26 34 00.3 r E12
2009-11-09 12:59:40 C 01 49 31.08 -26 33 52.6 r E12
2009-11-14 02:28:39 C 01 52 28.49 -24 59 46.0 o H21
2009-11-14 02:33:19 C 01 52 28.57 -24 59 42.5 o H21
2009-11-14 02:39:49 C 01 52 28.69 -24 59 37.4 o H21
2009-11-17 06:00:56 C 01 54 26.96 -23 56 38.2 r 703
2009-11-17 06:09:37 C 01 54 27.10 -23 56 31.6 r 703
2009-11-17 06:18:13 C 01 54 27.36 -23 56 23.3 r 703
2009-11-17 06:27:01 C 01 54 27.54 -23 56 17.3 r 703
2009-11-18 12:43:46 C 01 55 15.43 -23 31 08.1 r E12
2009-11-18 21:50:11 C 01 55 29.93 -23 23 56.0 v 204
2009-11-18 22:01:30 C 01 55 30.19 -23 23 46.6 v 204
2014-12-16 07:49:46 C 06 14 41.04 -04 04 43.8 t 705
2014-12-16 07:51:38 C 06 14 40.91 -04 04 44.1 t 705
2018-03-16 08:32:08 C 12 09 20.91 -00 39 18.5 o 291
2018-03-16 08:41:47 C 12 09 20.45 -00 39 14.3 o 291
2018-03-16 08:51:30 C 12 09 20.04 -00 39 09.9 o 291
2018-03-17 08:34:37 C 12 08 18.93 -00 27 29.4 o 691
2018-03-17 08:46:48 C 12 08 18.44 -00 27 23.5 o 691
2018-03-17 08:58:59 C 12 08 17.81 -00 27 17.5 o 691
2018-03-18 09:39:44 C 12 07 13.463 -00 14 59.16 U F51
2018-03-18 09:56:45 C 12 07 12.703 -00 14 51.04 U F51
2018-03-18 10:13:48 C 12 07 11.919 -00 14 42.32 U F51
2018-03-18 10:30:54 C 12 07 11.142 -00 14 33.76 U F51
2023-02-19 08:33:35 C 15 53 08.36 -09 48 01.8 V 807
2023-02-19 08:43:42 C 15 53 09.29 -09 47 59.8 V 807
2023-02-19 08:54:05 C 15 53 10.30 -09 47 57.4 V 807