2009 HB21

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.4205450430 ± 2.00e+00
Semi-major axis (a)1.7355810906 AU ± 3.00e+00
Inclination (i)39.68335018° ± 4.00e+00
Long. of Asc. Node (Ω)206.76534210° ± 5.00e+00
Arg. of Perihelion (ω)317.38012852° ± 6.00e+00
Mean Anomaly (M)109.57083686° ± 2.15e+00
Mean Motion (n)0.4312093900°/day ± 1.12e+00
Perihelion dist (q)1.00567120 AU ± 3.88e+00
Aphelion dist (Q)2.46468380 AU ± 5.50e+00
Orbital Period2.28568230 yr ± 5.93e+00
Physical Parameters
H (abs. magnitude)23.12
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-04-18
RMS Residual0.434″
Uncertainty4
Orbit TypeAmor
MOID0.082661 AU
Observations Used33
Oppositions1
Arc Total2009-2009
First Observation Used
Last Observation Used2009-04-26
Observations (36)
Date Type RA Dec Mag Band Observatory
2009-04-20 06:04:45 C 12 35 11.89 +06 51 05.1 19.5 c 704
2009-04-20 06:21:12 C 12 35 17.19 +06 55 05.4 19.7 c 704
2009-04-20 06:36:51 C 12 35 22.25 +06 58 54.6 19.8 c 704
2009-04-20 06:54:07 C 12 35 27.87 +07 03 04.5 19.6 c 704
2009-04-20 07:09:58 C 12 35 32.99 +07 06 53.8 20.2 c 704
2009-04-20 21:44:52 C 12 40 27.51 +10 29 16.2 r J95
2009-04-20 21:48:47 C 12 40 28.67 +10 30 09.5 r J95
2009-04-21 03:37:01 C 12 42 21.56 +11 46 07.7 r G96
2009-04-21 03:37:51 C 12 42 21.81 +11 46 18.4 r G96
2009-04-21 03:38:40 C 12 42 22.03 +11 46 29.1 r G96
2009-04-21 03:39:29 C 12 42 22.28 +11 46 39.7 r G96
2009-04-21 03:45:41 C 12 42 22.23 +11 47 57.3 r 850
2009-04-21 03:52:29 C 12 42 24.19 +11 49 24.4 r 850
2009-04-21 03:55:53 C 12 42 25.24 +11 50 08.1 r 850
2009-04-21 03:59:17 C 12 42 26.25 +11 50 51.6 r 850
2009-04-21 05:38:29 C 12 42 57.03 +12 11 53.3 19.5 c 704
2009-04-21 05:54:00 C 12 43 01.57 +12 15 09.2 19.1 c 704
2009-04-21 06:10:28 C 12 43 06.39 +12 18 36.7 19.6 c 704
2009-04-21 06:20:07 C 12 43 09.91 +12 20 38.0 o 673
2009-04-21 06:30:49 C 12 43 13.10 +12 22 50.7 o 673
2009-04-21 06:34:07 C 12 43 13.50 +12 23 35.8 c 651
2009-04-21 06:35:04 C 12 43 13.77 +12 23 48.6 c 651
2009-04-21 06:35:53 C 12 43 14.61 +12 23 54.4 o 673
2009-04-21 06:36:00 C 12 43 14.03 +12 23 59.8 c 651
2009-04-21 06:44:49 C 12 43 16.31 +12 25 47.6 19.3 c 704
2009-04-21 22:19:08 C 12 47 57.96 +15 31 03.4 r J95
2009-04-21 22:33:04 C 12 48 01.81 +15 33 41.0 r J95
2009-04-21 22:47:09 C 12 48 05.70 +15 36 20.0 r J95
2009-04-22 00:10:45 C 12 48 27.87 +15 52 03.4 v 204
2009-04-22 00:28:52 C 12 48 32.89 +15 55 25.5 v 204
2009-04-22 06:36:14 C 12 50 17.18 +17 02 28.6 o H55
2009-04-22 06:38:36 C 12 50 17.77 +17 02 53.4 o H55
2009-04-22 06:43:12 C 12 50 18.98 +17 03 42.0 o H55
2009-04-26 01:07:15 C 13 11 29.59 +29 08 27.1 r J95
2009-04-26 01:20:17 C 13 11 32.02 +29 09 42.5 r J95
2009-04-26 01:34:10 C 13 11 34.60 +29 11 03.0 r J95