2009 HE21

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.8600245000
Semi-major axis (a)2.4016346000 AU
Inclination (i)6.67514000°
Long. of Asc. Node (Ω)31.77415000°
Arg. of Perihelion (ω)301.34029000°
Mean Anomaly (M)144.09822000°
Mean Motion (n)0.2648156700°/day
Perihelion dist (q)0.33617000 AU
Aphelion dist (Q)4.46709920 AU
Orbital Period3.72186310 yr
Physical Parameters
H (abs. magnitude)24.50
G (slope)0.15
Orbit Solution
SourceMPC
Solution Date
RMS Residual0.410″
Uncertainty9
Orbit TypeApollo
MOID0.010553 AU
Observations Used30
Oppositions1
Arc Total
First Observation Used
Last Observation Used2009-04-28
Observations (31)
Date Type RA Dec Mag Band Observatory
2009-04-20 08:34:01 C 14 07 32.98 -09 56 17.8 r G96
2009-04-20 08:44:01 C 14 07 30.36 -09 56 08.6 r G96
2009-04-20 08:53:59 C 14 07 27.66 -09 56 00.6 r G96
2009-04-20 09:03:55 C 14 07 25.03 -09 55 52.2 r G96
2009-04-20 10:16:51 C 14 07 05.55 -09 54 50.3 r G96
2009-04-20 10:24:55 C 14 07 03.44 -09 54 44.7 r G96
2009-04-20 10:26:13 C 14 07 03.02 -09 54 42.8 r G96
2009-04-20 10:27:33 C 14 07 02.70 -09 54 41.8 r G96
2009-04-20 10:31:03 C 14 07 01.76 -09 54 39.9 r G96
2009-04-20 10:32:33 C 14 07 01.37 -09 54 37.6 r G96
2009-04-20 10:34:02 C 14 07 01.01 -09 54 36.7 r G96
2009-04-20 10:35:31 C 14 07 00.58 -09 54 35.0 r G96
2009-04-21 04:45:10 C 14 02 03.22 -09 38 13.6 r G96
2009-04-21 04:49:14 C 14 02 01.96 -09 38 09.4 r G96
2009-04-21 04:53:13 C 14 02 00.74 -09 38 05.3 r G96
2009-04-21 04:57:11 C 14 01 59.48 -09 38 01.5 r G96
2009-04-21 06:27:48 C 14 01 31.44 -09 36 34.3 r G96
2009-04-21 06:38:34 C 14 01 28.12 -09 36 23.8 r G96
2009-04-21 06:49:27 C 14 01 24.63 -09 36 12.7 r G96
2009-04-21 07:00:07 C 14 01 21.28 -09 36 02.2 r G96
2009-04-22 13:26:08 C 13 50 56.86 -09 00 04.9 o 474
2009-04-22 13:30:33 C 13 50 55.15 -08 59 58.8 o 474
2009-04-22 13:34:58 C 13 50 53.38 -08 59 53.4 o 474
2009-04-22 13:38:35 C 13 50 51.88 -08 59 48.6 o 474
2009-04-23 11:26:45 C 13 41 35.18 -08 27 39.7 o 474
2009-04-23 11:31:09 C 13 41 33.18 -08 27 33.2 o 474
2009-04-23 11:33:56 C 13 41 31.71 -08 27 27.5 o 474
2009-04-26 06:13:11 C 12 56 50.40 -05 44 01.7 V G96
2009-04-26 06:40:01 C 12 56 24.42 -05 42 23.0 V G96
2009-04-28 04:23:01 C 11 58 48.04 -01 49 56.8 V G96
2009-04-28 04:30:57 C 11 58 34.81 -01 49 02.5 V G96