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
2023-12-05 11:34:22 C 05 00 36.952 -08 37 33.45 X F52
2023-12-05 11:41:44 C 05 00 36.515 -08 37 33.32 X F51
2023-12-05 11:52:24 C 05 00 35.845 -08 37 32.93 X F52
2023-12-05 11:57:40 C 05 00 35.518 -08 37 32.99 X F51
2023-12-05 12:10:20 C 05 00 34.730 -08 37 32.38 X F52
2023-12-08 10:42:14 C 04 56 24.791 -08 34 18.94 X F52
2023-12-08 11:01:03 C 04 56 23.669 -08 34 17.87 X F52
2023-12-08 11:38:30 C 04 56 21.432 -08 34 15.35 X F52
2023-12-10 10:10:55 C 04 53 42.053 -08 30 21.66 X F51
2023-12-10 10:27:40 C 04 53 41.085 -08 30 19.94 X F51
2023-12-10 10:44:25 C 04 53 40.117 -08 30 18.38 X F51
2023-12-15 09:19:37 C 04 47 17.479 -08 14 30.79 X F52
2023-12-15 09:35:33 C 04 47 16.640 -08 14 28.03 X F52
2023-12-15 09:51:31 C 04 47 15.779 -08 14 25.41 X F52
2023-12-15 10:07:22 C 04 47 14.952 -08 14 22.79 X F52
2024-01-11 05:53:22 C 04 25 34.522 -05 07 08.94 V V06
2024-01-11 06:03:40 C 04 25 34.313 -05 07 04.66 V V06
2024-01-11 06:49:22 C 04 25 33.614 -05 06 49.00 V V06