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
2023-03-18 14:28:24 C 17 04 28.872 -05 08 52.44 U F52
2023-03-18 14:49:47 C 17 04 31.543 -05 08 37.50 U F52
2023-03-18 15:10:56 C 17 04 34.181 -05 08 22.69 U F52
2023-04-29 09:50:58 S 20 06 53.35 +16 12 06.6 L C51
2023-04-29 12:58:00 S 20 07 41.29 +16 17 21.2 L C51
2023-04-29 16:04:18 S 20 08 29.19 +16 22 33.5 L C51
2023-04-29 19:11:20 S 20 09 17.17 +16 27 43.3 L C51
2023-04-29 20:44:51 S 20 09 41.27 +16 30 22.6 L C51
2023-04-29 22:18:22 S 20 10 05.35 +16 32 57.8 L C51
2023-04-30 01:25:24 S 20 10 53.54 +16 38 10.6 L C51
2023-04-30 02:58:55 S 20 11 17.80 +16 40 46.9 L C51
2023-04-30 06:05:57 S 20 12 06.13 +16 45 59.0 L C51
2023-05-07 02:26:03 C 20 56 41.87 +21 08 32.6 X K83
2023-05-07 02:30:59 C 20 56 43.25 +21 08 40.4 X K83
2023-05-07 02:35:45 C 20 56 44.59 +21 08 47.9 X K83
2023-05-15 02:00:06 C 21 52 27.50 +25 20 31.4 X C95
2023-05-15 02:20:05 C 21 52 33.45 +25 20 54.5 X C95
2023-09-21 13:45:41 C 05 54 13.740 +05 06 45.53 X F51
2023-09-21 14:00:42 C 05 54 14.162 +05 06 35.87 X F51
2023-09-21 14:15:43 C 05 54 14.626 +05 06 25.88 X F51
2023-09-21 14:30:44 C 05 54 15.064 +05 06 15.90 X F51
2023-10-08 14:31:56 C 06 00 35.886 +00 35 16.34 X F51
2023-10-08 14:49:43 C 06 00 35.866 +00 35 04.69 X F51
2023-10-08 15:02:24 C 06 00 35.830 +00 34 56.57 X F51
2023-10-08 15:15:07 C 06 00 35.802 +00 34 48.14 X F51
2023-10-15 10:25:51 C 05 59 32.042 -01 10 28.49 V G96
2023-10-15 10:32:38 C 05 59 31.938 -01 10 32.95 V G96
2023-10-15 10:39:28 C 05 59 31.848 -01 10 37.13 V G96
2023-10-15 10:46:14 C 05 59 31.740 -01 10 41.30 V G96
2023-11-03 14:00:55 C 05 45 41.424 -05 32 13.25 X F51
2023-11-03 14:34:57 C 05 45 39.792 -05 32 29.60 X F51
2023-11-03 14:51:58 C 05 45 38.977 -05 32 37.86 X F51
2023-11-08 10:08:20 C 05 39 58.360 -06 24 48.10 V G96
2023-11-08 10:15:47 C 05 39 57.956 -06 24 51.62 V G96
2023-11-08 10:23:14 C 05 39 57.564 -06 24 54.50 V G96
2023-11-08 10:30:42 C 05 39 57.157 -06 24 57.82 V G96
2023-11-08 13:01:14 C 05 39 49.314 -06 25 59.71 X F52
2023-11-08 13:18:08 C 05 39 48.383 -06 26 06.87 X F52
2023-11-08 13:35:04 C 05 39 47.445 -06 26 13.85 X F52
2023-11-08 13:51:58 C 05 39 46.540 -06 26 21.07 X F52
2023-11-13 12:32:16 C 05 33 12.657 -07 11 50.91 X F51
2023-11-13 13:12:14 C 05 33 10.254 -07 12 04.47 X F51
2023-11-13 13:31:34 C 05 33 09.100 -07 12 11.53 X F51
2023-11-19 11:14:54 C 05 24 38.301 -07 54 26.19 X F52
2023-11-19 11:34:39 C 05 24 37.040 -07 54 30.95 X F52
2023-11-19 11:54:27 C 05 24 35.777 -07 54 36.16 X F52
2023-11-19 12:14:15 C 05 24 34.506 -07 54 40.99 X F52
2023-12-05 11:08:33 C 05 00 38.560 -08 37 34.12 X F51
2023-12-05 11:16:27 C 05 00 38.073 -08 37 33.94 X F52
2023-12-05 11:25:48 C 05 00 37.483 -08 37 33.46 X F51