2021 HC3

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.6754944000 ± 2.54e-07
Semi-major axis (a)1.1215307361 AU ± 6.13e-08
Inclination (i)28.39799929° ± 3.30e-05
Long. of Asc. Node (Ω)219.53550930° ± 4.19e-06
Arg. of Perihelion (ω)132.14669527° ± 2.82e-05
Mean Anomaly (M)253.66722558° ± 1.19e-04
Mean Motion (n)0.8298421803°/day ± 6.81e-08
Perihelion dist (q)0.36394300 AU ± 2.86e-07
Aphelion dist (Q)1.87911847 AU ± 3.03e-07
Orbital Period1.18772739 yr ± 9.74e-08
Physical Parameters
H (abs. magnitude)21.57
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.340″
Uncertainty0
Orbit TypeApollo
MOID0.047159 AU
Observations Used142
Oppositions1
Arc Total2018-2022
First Observation Used2018-02-18
Last Observation Used2022-05-24
Observations (146)
Date Type RA Dec Mag Band Observatory
2021-05-02 04:53:35 C 15 46 21.47 +07 24 32.2 u H21
2021-05-02 04:55:11 C 15 46 21.19 +07 25 16.1 u H21
2021-05-02 06:21:50 C 15 46 02.57 +08 04 49.9 V I22
2021-05-02 06:22:20 C 15 46 02.51 +08 05 04.3 V I22
2021-05-02 11:30:26 C 15 45 16.18 +10 33 09.4 V T08
2021-05-02 11:34:48 C 15 45 15.29 +10 35 17.6 V T08
2021-05-02 12:21:53 C 15 45 05.61 +10 58 35.6 V T08
2021-05-02 12:23:46 C 15 45 14.85 +10 58 44.4 r P93
2021-05-02 12:27:04 C 15 45 14.24 +11 00 23.9 r P93
2021-05-02 12:30:30 C 15 45 03.82 +11 02 52.7 V T08
2021-05-02 12:40:14 C 15 45 11.77 +11 06 57.9 r P93
2021-05-02 12:46:50 C 15 45 10.48 +11 10 16.9 r P93
2021-05-02 13:45:08 C 15 44 57.24 +11 42 26.9 V Q62
2021-05-02 13:46:24 C 15 44 56.99 +11 43 04.4 V Q62
2021-05-02 13:48:05 C 15 44 56.64 +11 43 56.2 V Q62
2021-05-02 13:50:09 C 15 44 56.20 +11 44 59.5 V Q62
2021-05-02 21:04:23 C 15 43 40.60 +15 30 46.3 V G34
2021-05-02 21:06:44 C 15 43 40.08 +15 32 03.9 V G34
2021-05-02 21:09:08 C 15 43 39.56 +15 33 22.2 V G34
2021-05-02 21:11:23 C 15 43 40.24 +15 34 32.2 q J69
2021-05-02 21:22:39 C 15 43 37.93 +15 40 45.5 q J69
2021-05-02 21:26:24 C 15 43 37.14 +15 42 50.1 q J69
2021-05-02 21:30:09 C 15 43 36.35 +15 44 54.6 q J69
2021-05-02 21:33:55 C 15 43 35.56 +15 46 59.8 q J69
2021-05-02 21:37:41 C 15 43 34.78 +15 49 05.2 q J69
2021-05-02 22:04:04 C 15 43 29.09 +16 03 43.6 V Z80
2021-05-02 22:07:24 C 15 43 28.36 +16 05 35.2 V Z80
2021-05-02 22:10:44 C 15 43 27.62 +16 07 27.0 V Z80
2021-05-02 22:14:05 C 15 43 26.94 +16 09 18.3 V Z80
2021-05-02 22:14:41 C 15 43 26.34 +16 09 55.1 V 204
2021-05-02 22:15:26 C 15 43 26.17 +16 10 19.7 V 204
2021-05-02 22:16:15 C 15 43 26.00 +16 10 47.6 V 204
2021-05-02 22:17:23 C 15 43 26.18 +16 11 09.6 V Z80
2021-05-02 22:20:43 C 15 43 25.48 +16 13 02.0 V Z80
2021-05-03 20:00:11 C 15 38 19.13 +29 38 46.1 V L18
2021-05-03 20:00:36 C 15 38 19.06 +29 39 03.2 V L18
2021-05-03 20:01:00 C 15 38 18.84 +29 39 19.8 V L18
2021-05-03 20:01:29 C 15 38 18.72 +29 39 38.6 V L18
2021-05-03 21:03:02 C 15 37 59.62 +30 21 46.2 V L54
2021-05-03 21:17:22 C 15 37 54.85 +30 31 32.8 V L54
2021-05-03 21:31:56 C 15 37 49.99 +30 41 32.5 V L54
2021-05-03 21:46:29 C 15 37 45.03 +30 51 31.0 V L54
2021-05-03 22:15:16 C 15 37 35.24 +31 11 18.3 V L54
2021-05-03 22:26:50 C 15 37 31.28 +31 19 17.9 V L54
2021-05-04 03:32:45 C 15 35 45.00 +34 53 19.4 V G40
2021-05-04 03:37:55 C 15 35 42.95 +34 56 57.4 V G40
2021-05-04 03:43:44 C 15 35 40.69 +35 01 03.0 V G40
2021-05-04 21:17:50 C 15 28 29.46 +47 41 10.2 V Z80
2021-05-04 21:57:28 C 15 28 06.20 +48 10 34.8 V 130
2021-05-04 21:58:23 C 15 28 05.68 +48 11 15.5 V 130