2009 HF21

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.5699715140
Semi-major axis (a)2.3393859183 AU
Inclination (i)4.26783404°
Long. of Asc. Node (Ω)34.71305055°
Arg. of Perihelion (ω)188.67215479° ± 6.00e+00
Mean Anomaly (M)226.28065851°
Mean Motion (n)0.2754116400°/day
Perihelion dist (q)1.00595560 AU
Aphelion dist (Q)3.67331160 AU
Orbital Period3.57867100 yr
Physical Parameters
H (abs. magnitude)26.20
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-04-18
RMS Residual1.124″
Uncertainty
Orbit TypeAmor
MOID0.002862 AU
Observations Used47
Oppositions1
Arc Total
First Observation Used
Last Observation Used2009-04-22
Observations (48)
Date Type RA Dec Mag Band Observatory
2009-04-20 09:21:19 C 14 55 47.10 +00 20 21.8 r 703
2009-04-20 09:31:45 C 14 56 04.59 +00 17 25.9 r 703
2009-04-20 09:42:07 C 14 56 22.41 +00 14 26.8 r 703
2009-04-20 10:20:09 C 14 57 25.59 +00 03 30.4 v H01
2009-04-20 10:24:12 C 14 57 32.49 +00 02 21.4 v H01
2009-04-20 10:29:21 C 14 57 41.30 +00 00 53.6 v H01
2009-04-20 10:34:47 C 14 57 50.63 -00 00 40.0 v H01
2009-04-20 10:35:36 C 14 57 53.06 -00 00 44.1 r 703
2009-04-20 10:36:08 C 14 57 53.92 -00 00 53.4 r 703
2009-04-20 10:36:46 C 14 57 55.00 -00 01 03.5 r 703
2009-04-20 11:44:05 C 14 59 51.08 -00 20 19.5 r 703
2009-04-20 11:44:45 C 14 59 52.27 -00 20 30.8 r 703
2009-04-20 11:45:16 C 14 59 53.21 -00 20 39.5 r 703
2009-04-20 11:46:56 C 14 59 55.96 -00 21 07.5 r 703
2009-04-20 11:47:26 C 14 59 57.01 -00 21 17.6 r 703
2009-04-20 11:48:06 C 14 59 58.12 -00 21 27.8 r 703
2009-04-20 11:48:38 C 14 59 58.99 -00 21 37.1 r 703
2009-04-21 00:04:12 C 15 23 28.30 -04 02 07.7 r J95
2009-04-21 00:07:25 C 15 23 34.33 -04 03 06.7 r J95
2009-04-21 00:10:36 C 15 23 40.30 -04 04 05.5 r J95
2009-04-21 07:55:50 C 15 39 02.87 -06 25 59.5 c 651
2009-04-21 07:56:35 C 15 39 04.35 -06 26 13.5 c 651
2009-04-21 07:57:21 C 15 39 05.80 -06 26 27.7 c 651
2009-04-21 15:42:14 C 15 54 55.77 -08 51 36.8 o 300
2009-04-21 15:44:35 C 15 55 00.45 -08 52 21.5 o 300
2009-04-21 15:45:23 C 15 55 01.95 -08 52 35.5 o 300
2009-04-21 15:56:05 C 15 55 07.86 -08 46 14.7 o 474
2009-04-21 15:56:54 C 15 55 09.51 -08 46 30.0 o 474
2009-04-21 15:57:34 C 15 55 10.82 -08 46 42.1 o 474
2009-04-21 15:58:24 C 15 55 12.49 -08 46 57.9 o 474
2009-04-22 01:08:25 C 16 14 31.34 -11 46 58.0 v 204
2009-04-22 01:13:52 C 16 14 42.24 -11 48 37.6 v 204
2009-04-22 01:19:18 C 16 14 53.23 -11 50 16.1 v 204
2009-04-22 01:22:32 C 16 15 02.95 -11 51 35.3 r J95
2009-04-22 01:30:27 C 16 15 18.96 -11 53 59.3 r J95
2009-04-22 01:37:52 C 16 15 33.97 -11 56 14.4 r J95
2009-04-22 06:50:36 C 16 26 38.47 -13 28 45.5 o H55
2009-04-22 06:52:58 C 16 26 43.34 -13 29 28.0 o H55
2009-04-22 06:55:21 C 16 26 48.01 -13 30 09.8 o H55
2009-04-22 06:58:05 C 16 26 53.55 -13 30 59.1 o H55
2009-04-22 15:32:44 C 16 44 48.31 -15 48 29.1 o 474
2009-04-22 15:33:45 C 16 44 50.33 -15 48 45.8 o 474
2009-04-22 15:34:24 C 16 44 51.64 -15 48 56.6 o 474
2009-04-22 15:35:04 C 16 44 52.99 -15 49 07.7 o 474
2009-04-22 15:35:45 C 16 44 54.32 -15 49 18.7 o 474
2009-04-22 15:36:25 C 16 44 55.66 -15 49 30.0 o 474
2009-04-22 15:37:04 C 16 44 57.00 -15 49 41.0 o 474
2009-04-22 15:38:14 C 16 44 59.34 -15 49 59.8 o 474