2009 HJ21

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.6468478541 ± 2.00e+00
Semi-major axis (a)1.6241131865 AU
Inclination (i)3.02227037° ± 4.00e+00
Long. of Asc. Node (Ω)30.37457127° ± 5.00e+00
Arg. of Perihelion (ω)278.06503984° ± 6.00e+00
Mean Anomaly (M)340.03835189°
Mean Motion (n)0.4761892500°/day
Perihelion dist (q)0.57354130 AU
Aphelion dist (Q)2.67468530 AU
Orbital Period2.06978140 yr
Physical Parameters
H (abs. magnitude)27.50
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-04-18
RMS Residual0.270″
Uncertainty
Orbit TypeApollo
MOID0.002458 AU
Observations Used18
Oppositions1
Arc Total2009-2009
First Observation Used
Last Observation Used2009-04-22
Observations (19)
Date Type RA Dec Mag Band Observatory
2009-04-21 08:43:52 C 14 36 00.84 -17 32 27.4 r G96
2009-04-21 08:53:49 C 14 36 04.31 -17 34 26.9 r G96
2009-04-21 09:03:41 C 14 36 07.78 -17 36 26.6 r G96
2009-04-21 09:13:38 C 14 36 11.29 -17 38 27.6 r G96
2009-04-21 10:03:29 C 14 36 29.80 -17 48 46.6 r G96
2009-04-21 10:05:00 C 14 36 30.38 -17 49 06.0 r G96
2009-04-21 10:06:42 C 14 36 31.03 -17 49 27.4 r G96
2009-04-21 10:08:15 C 14 36 31.60 -17 49 46.4 r G96
2009-04-21 14:05:36 C 14 38 50.86 -18 36 41.2 o 474
2009-04-21 14:07:07 C 14 38 51.60 -18 37 03.8 o 474
2009-04-21 14:07:56 C 14 38 52.03 -18 37 17.2 o 474
2009-04-21 14:09:16 C 14 38 52.69 -18 37 37.7 o 474
2009-04-21 14:11:17 C 14 38 53.70 -18 38 09.0 o 474
2009-04-21 14:12:07 C 14 38 54.14 -18 38 22.0 o 474
2009-04-21 14:12:57 C 14 38 54.53 -18 38 34.7 o 474
2009-04-21 14:13:47 C 14 38 54.96 -18 38 47.4 o 474
2009-04-22 07:52:30 C 15 01 08.22 -27 50 15.1 o H55
2009-04-22 07:57:53 C 15 01 20.93 -27 55 25.8 o H55
2009-04-22 08:03:35 C 15 01 34.72 -28 00 59.5 o H55