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
2021-05-04 21:59:26 C 15 28 05.06 +48 12 01.7 V 130
2021-05-04 22:36:04 C 15 27 44.90 +48 38 17.2 V Z80
2021-05-04 22:41:32 C 15 27 41.69 +48 42 16.5 V Z80
2021-05-04 22:45:33 C 15 27 39.33 +48 45 12.1 V Z80
2021-05-04 23:00:21 C 15 27 30.82 +48 55 57.9 V J95
2021-05-04 23:02:00 C 15 27 29.83 +48 57 10.0 V J95
2021-05-04 23:04:01 C 15 27 28.64 +48 58 38.0 V J95
2021-05-04 23:06:14 C 15 27 27.31 +49 00 14.4 V J95
2021-05-05 04:59:01 C 15 24 03.51 +53 14 28.8 V I52
2021-05-05 04:59:13 C 15 24 03.33 +53 14 37.4 V I52
2021-05-05 04:59:24 C 15 24 03.23 +53 14 45.4 V I52
2021-05-05 08:21:07 C 15 21 32.74 +55 37 58.1 U I41
2021-05-05 08:21:37 C 15 21 32.36 +55 38 18.7 U I41
2021-05-05 08:23:58 C 15 21 28.43 +55 39 58.2 V 703
2021-05-05 08:24:38 C 15 21 27.84 +55 40 28.9 V 703
2021-05-05 08:31:54 C 15 21 22.05 +55 45 31.8 V 703
2021-05-05 08:39:47 C 15 21 15.75 +55 51 05.0 V 703
2021-05-05 08:47:40 C 15 21 09.27 +55 56 35.8 V 703
2021-05-05 08:48:20 C 15 21 08.78 +55 56 57.4 V 703
2021-05-05 08:52:16 C 15 21 07.47 +55 59 49.2 U I41
2021-05-05 08:52:46 C 15 21 06.99 +56 00 08.5 U I41
2021-05-05 08:53:38 C 15 21 06.40 +56 00 44.0 U I41
2021-05-05 08:54:08 C 15 21 06.00 +56 01 03.0 U I41
2021-05-05 21:19:25 C 15 10 00.76 +64 21 18.4 V Z80
2021-05-05 21:31:45 C 15 09 46.12 +64 29 16.3 V Z80
2021-05-06 02:11:05 S 15 03 49.668 +67 22 40.73 L C51
2021-05-06 21:51:02 C 14 18 02.43 +78 07 03.5 V Z80
2021-05-06 22:01:53 C 14 17 18.64 +78 12 09.4 V Z80
2021-05-06 22:02:18 C 14 17 17.35 +78 12 21.7 V J69
2021-05-06 22:03:48 C 14 17 11.22 +78 13 03.8 V J69
2021-05-06 23:48:16 C 14 09 37.78 +79 01 01.3 V J69
2021-05-06 23:55:44 C 14 09 03.34 +79 04 23.0 V J69
2021-05-07 00:03:13 C 14 08 28.44 +79 07 43.2 V J69
2021-05-07 00:46:24 C 14 05 01.60 +79 26 42.9 V Z99
2021-05-07 00:47:40 C 14 04 55.32 +79 27 16.3 V Z99
2021-05-07 00:49:35 C 14 04 45.91 +79 28 07.0 V Z99
2021-05-07 00:50:52 C 14 04 39.72 +79 28 40.4 V Z99
2021-05-07 00:52:08 C 14 04 33.34 +79 29 13.5 V Z99
2021-05-07 00:53:25 C 14 04 27.10 +79 29 47.4 V Z99
2021-05-07 00:54:42 C 14 04 20.68 +79 30 21.0 V Z99
2022-05-23 06:38:47 C 10 24 20.549 -05 03 59.68 V T14
2022-05-23 06:42:51 C 10 24 20.604 -05 03 55.78 V T14
2022-05-23 06:46:56 C 10 24 20.655 -05 03 51.93 V T14
2022-05-24 06:05:05 C 10 24 43.248 -04 42 00.11 V T14
2022-05-24 06:09:10 C 10 24 43.309 -04 41 56.27 V T14
2022-05-24 06:13:14 C 10 24 43.366 -04 41 52.49 V T14