2021 HC2

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.1982521673 ± 3.65e-02
Semi-major axis (a)1.0832492115 AU ± 2.44e-02
Inclination (i)1.51736570° ± 2.98e-01
Long. of Asc. Node (Ω)27.49256583° ± 1.04e-01
Arg. of Perihelion (ω)95.67194229° ± 3.27e-01
Mean Anomaly (M)89.60680797° ± 5.41e+01
Mean Motion (n)0.8749232400°/day ± 2.95e-02
Perihelion dist (q)0.86860330 AU ± 4.42e-02
Aphelion dist (Q)1.29670330 AU ± 4.92e-02
Orbital Period1.12650750 yr ± 3.80e-02
Physical Parameters
H (abs. magnitude)28.82
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-04-18
RMS Residual0.616″
Uncertainty3
Orbit TypeApollo
MOID0.002448 AU
Observations Used25
Oppositions1
Arc Total2021-2021
First Observation Used
Last Observation Used2021-05-05
Observations (25)
Date Type RA Dec Mag Band Observatory
2021-04-19 08:21:07 C 13 12 11.127 -09 49 05.23 U F52
2021-04-19 08:35:58 C 13 12 11.402 -09 49 55.47 U F52
2021-04-19 08:50:47 C 13 12 11.653 -09 50 44.08 U F52
2021-04-19 13:49:27 C 13 12 32.74 -09 59 13.8 V 474
2021-04-19 13:53:40 C 13 12 32.97 -09 59 25.9 V 474
2021-04-19 13:57:54 C 13 12 33.17 -09 59 38.8 V 474
2021-04-19 14:02:08 C 13 12 33.39 -09 59 50.8 V 474
2021-04-19 22:35:51 C 13 13 40.91 -10 33 54.1 V 033
2021-04-19 22:41:00 C 13 13 41.10 -10 34 08.4 V 033
2021-04-20 03:25:52 C 13 14 27.68 -10 45 09.8 o 691
2021-04-20 03:54:28 C 13 14 28.77 -10 46 29.7 o 691
2021-04-20 04:21:52 C 13 14 28.10 -10 47 57.3 V H01
2021-04-20 04:23:05 C 13 14 29.60 -10 47 47.5 o 691
2021-04-20 04:26:17 C 13 14 28.22 -10 48 09.2 V H01
2021-04-20 04:42:53 C 13 14 28.59 -10 48 53.9 V H01
2021-04-20 04:51:24 C 13 14 28.76 -10 49 16.6 V H01
2021-04-20 08:11:27 C 13 14 32.56 -10 57 33.8 V I52
2021-04-20 08:16:18 C 13 14 32.71 -10 57 45.1 V I52
2021-04-20 08:21:09 C 13 14 32.76 -10 57 57.1 V I52
2021-04-20 08:26:00 C 13 14 32.86 -10 58 08.0 V I52
2021-04-21 04:28:15 C 13 16 39.74 -11 42 42.6 V 291
2021-04-21 04:40:33 C 13 16 39.90 -11 43 09.4 V 291
2021-04-21 04:52:55 C 13 16 40.05 -11 43 35.6 V 291
2021-05-05 08:02:29 C 13 29 27.739 -15 59 19.69 V G37
2021-05-05 08:09:23 C 13 29 27.724 -15 59 21.23 V G37