2009 HH21

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.2626509000
Semi-major axis (a)1.4011562000 AU
Inclination (i)4.22835000°
Long. of Asc. Node (Ω)213.25619000°
Arg. of Perihelion (ω)11.83557000°
Mean Anomaly (M)346.42359000°
Mean Motion (n)0.5942568800°/day
Perihelion dist (q)1.03314130 AU
Aphelion dist (Q)1.76917110 AU
Orbital Period1.65855480 yr
Physical Parameters
H (abs. magnitude)26.90
G (slope)0.15
Orbit Solution
SourceMPC
Solution Date
RMS Residual0.410″
Uncertainty7
Orbit TypeAmor
MOID0.027500 AU
Observations Used21
Oppositions1
Arc Total
First Observation Used
Last Observation Used2009-04-28
Observations (24)
Date Type RA Dec Mag Band Observatory
2009-04-21 08:39:53 C 14 36 16.38 -19 51 23.6 r G96
2009-04-21 08:49:50 C 14 36 22.39 -19 50 56.8 r G96
2009-04-21 08:59:47 C 14 36 28.44 -19 50 29.6 r G96
2009-04-21 09:15:04 C 14 36 37.69 -19 49 47.4 r G96
2009-04-21 09:15:53 C 14 36 38.16 -19 49 44.6 r G96
2009-04-21 09:16:43 C 14 36 38.70 -19 49 42.9 r G96
2009-04-21 09:17:33 C 14 36 39.20 -19 49 40.6 r G96
2009-04-21 10:04:11 C 14 37 07.60 -19 47 29.3 r G96
2009-04-21 10:05:51 C 14 37 08.65 -19 47 24.9 r G96
2009-04-21 10:07:31 C 14 37 09.69 -19 47 19.9 r G96
2009-04-21 10:09:04 C 14 37 10.66 -19 47 15.1 r G96
2009-04-21 15:23:17 C 14 40 43.33 -19 27 56.6 o 474
2009-04-21 15:26:29 C 14 40 45.47 -19 27 45.6 o 474
2009-04-22 07:24:16 C 14 51 45.19 -18 46 53.5 o H55
2009-04-22 07:34:07 C 14 51 51.46 -18 46 23.0 o H55
2009-04-22 07:43:12 C 14 51 57.22 -18 45 54.6 o H55
2009-04-23 07:10:00 C 15 08 28.00 -17 30 09.9 o H55
2009-04-23 07:17:04 C 15 08 32.57 -17 29 45.1 o H55
2009-04-23 07:20:13 C 15 08 34.61 -17 29 34.5 o H55
2009-04-27 09:51:06 C 16 19 04.81 -10 53 08.9 o 291
2009-04-27 09:57:03 C 16 19 08.69 -10 52 40.5 o 291
2009-04-27 10:02:50 C 16 19 12.57 -10 52 13.5 o 291
2009-04-28 10:33:43 C 16 35 56.83 -09 03 36.2 o 291
2009-04-28 10:39:05 C 16 36 00.30 -09 03 10.9 o 291