2009 HC21

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.1569611639 ± 1.45e-07
Semi-major axis (a)1.1682719966 AU ± 9.57e-09
Inclination (i)19.35329255° ± 1.71e-05
Long. of Asc. Node (Ω)213.28511899° ± 7.60e-06
Arg. of Perihelion (ω)126.90343603° ± 3.51e-05
Mean Anomaly (M)293.03725402° ± 8.08e-05
Mean Motion (n)0.7805420882°/day ± 9.59e-09
Perihelion dist (q)0.98489866 AU ± 1.70e-07
Aphelion dist (Q)1.35164533 AU ± 1.70e-07
Orbital Period1.26274585 yr ± 1.55e-08
Physical Parameters
H (abs. magnitude)22.10
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-01
RMS Residual0.321″
Uncertainty0
Orbit TypeApollo
MOID0.042764 AU
Observations Used70
Oppositions1
Arc Total2009-2014
First Observation Used2009-04-20
Last Observation Used2014-03-24
Observations (72)
Date Type RA Dec Mag Band Observatory
2009-05-21 04:26:37 C 13 12 17.68 +19 13 53.4 o H55
2009-05-21 04:37:44 C 13 12 17.55 +19 14 14.8 o H55
2009-05-28 07:57:41 C 13 12 55.31 +24 07 49.9 o 291
2009-05-28 08:13:24 C 13 12 55.49 +24 08 12.7 o 291
2009-06-14 04:53:53 C 13 24 49.96 +31 11 02.6 o 291
2009-06-14 05:00:04 C 13 24 50.15 +31 11 06.7 o 291
2009-06-14 05:06:38 C 13 24 50.39 +31 11 10.8 o 291
2009-11-01 05:00:31 C 21 13 23.197 -07 42 36.48 o 568
2009-11-01 05:02:55 C 21 13 24.028 -07 42 45.49 o 568
2009-11-01 05:04:50 C 21 13 24.706 -07 42 52.69 o 568
2009-11-09 07:10:30 C 22 21 45.144 -18 10 53.52 o 568
2009-11-09 07:16:19 C 22 21 47.024 -18 11 08.73 o 568
2014-03-07 11:12:50 C 11 27 45.269 -41 27 25.56 t 568
2014-03-07 11:21:50 C 11 27 44.617 -41 27 19.60 t 568
2014-03-07 11:28:29 C 11 27 44.134 -41 27 15.22 t 568
2014-03-07 11:34:02 C 11 27 43.715 -41 27 11.52 t 568
2014-03-23 02:24:17 C 11 02 11.25 -34 20 51.6 u 807
2014-03-23 02:40:18 C 11 02 10.12 -34 20 25.6 u 807
2014-03-23 02:56:22 C 11 02 09.00 -34 19 59.7 u 807
2014-03-24 02:59:47 C 11 00 38.53 -33 40 15.3 u 807
2014-03-24 03:12:16 C 11 00 37.68 -33 39 54.5 u 807
2014-03-24 03:25:36 C 11 00 36.75 -33 39 32.1 u 807