2009 HG21

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.3676635759 ± 5.17e-04
Semi-major axis (a)0.9077560372 AU ± 1.45e-05
Inclination (i)5.42704200° ± 1.01e-02
Long. of Asc. Node (Ω)32.32970488° ± 1.36e-03
Arg. of Perihelion (ω)317.12268204° ± 4.79e-03
Mean Anomaly (M)317.30243937° ± 1.75e-01
Mean Motion (n)1.1396160505°/day ± 2.73e-05
Perihelion dist (q)0.57400721 AU ± 4.70e-04
Aphelion dist (Q)1.24150487 AU ± 4.70e-04
Orbital Period0.86487575 yr ± 2.07e-05
Physical Parameters
H (abs. magnitude)25.00
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-01
RMS Residual0.301″
Uncertainty3
Orbit TypeAten
MOID0.016252 AU
Observations Used27
Oppositions1
Arc Total2009-2009
First Observation Used2009-04-20
Last Observation Used2009-04-23
Observations (27)
Date Type RA Dec Mag Band Observatory
2009-04-20 10:13:18 C 14 06 07.23 -09 58 58.5 r G96
2009-04-20 10:14:33 C 14 06 06.84 -09 58 58.8 r G96
2009-04-20 10:15:47 C 14 06 06.26 -09 58 58.8 r G96
2009-04-20 10:24:55 C 14 06 02.70 -09 58 59.0 r G96
2009-04-20 10:26:13 C 14 06 02.19 -09 58 59.0 r G96
2009-04-20 10:27:33 C 14 06 01.65 -09 58 58.8 r G96
2009-04-20 10:29:02 C 14 06 01.08 -09 58 59.2 r G96
2009-04-20 10:31:03 C 14 06 00.28 -09 58 59.0 r G96
2009-04-20 10:32:33 C 14 05 59.64 -09 58 59.0 r G96
2009-04-20 10:34:02 C 14 05 59.10 -09 58 59.2 r G96
2009-04-20 10:48:43 C 14 05 53.30 -09 58 59.5 r G96
2009-04-20 10:50:13 C 14 05 52.76 -09 58 59.6 r G96
2009-04-21 06:29:46 C 13 58 12.03 -10 00 19.0 r G96
2009-04-21 06:40:33 C 13 58 07.24 -10 00 19.6 r G96
2009-04-21 06:51:27 C 13 58 02.38 -10 00 20.5 r G96
2009-04-21 07:02:04 C 13 57 57.63 -10 00 20.8 r G96
2009-04-21 07:42:23 C 13 57 39.57 -10 00 22.2 c 651
2009-04-21 07:43:44 C 13 57 38.99 -10 00 21.3 c 651
2009-04-22 13:52:30 C 13 43 50.75 -09 58 23.1 o 474
2009-04-22 13:54:00 C 13 43 49.93 -09 58 23.1 o 474
2009-04-22 13:55:04 C 13 43 49.36 -09 58 23.0 o 474
2009-04-22 13:56:09 C 13 43 48.81 -09 58 22.9 o 474
2009-04-23 09:40:39 C 13 33 33.59 -09 57 18.4 o 474
2009-04-23 09:42:20 C 13 33 32.61 -09 57 18.5 o 474
2009-04-23 09:43:30 C 13 33 31.91 -09 57 18.4 o 474
2009-04-23 09:44:49 C 13 33 31.13 -09 57 18.3 o 474
2009-04-23 09:47:30 C 13 33 29.61 -09 57 18.0 o 474