2018 HC1

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.5780206734 ± 2.00e+00
Semi-major axis (a)1.7997665186 AU ± 3.00e+00
Inclination (i)9.07656824° ± 4.00e+00
Long. of Asc. Node (Ω)30.34309220° ± 5.00e+00
Arg. of Perihelion (ω)108.46925174° ± 6.00e+00
Mean Anomaly (M)70.28191192° ± 3.19e+00
Mean Motion (n)0.4082809100°/day ± 1.02e+00
Perihelion dist (q)0.75925670 AU ± 3.82e+00
Aphelion dist (Q)2.83983850 AU ± 5.95e+00
Orbital Period2.41404300 yr ± 6.04e+00
Physical Parameters
H (abs. magnitude)26.70
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-04-18
RMS Residual4.047″
Uncertainty4
Orbit TypeApollo
MOID0.002622 AU
Observations Used50
Oppositions1
Arc Total2018-2018
First Observation Used
Last Observation Used2018-04-24
Observations (50)
Date Type RA Dec Mag Band Observatory
2018-04-21 08:17:00 C 14 05 44.48 -18 36 37.5 U 703
2018-04-21 08:34:45 C 14 05 37.47 -18 43 27.4 U 703
2018-04-21 08:42:41 C 14 05 34.46 -18 46 27.6 U 703
2018-04-21 10:05:49 C 14 05 04.71 -19 16 32.3 U I52
2018-04-21 10:06:04 C 14 05 04.65 -19 16 38.1 U I52
2018-04-21 10:06:20 C 14 05 04.52 -19 16 43.4 U I52
2018-04-21 10:06:36 C 14 05 04.51 -19 16 49.0 U I52
2018-04-21 10:31:28 C 14 04 56.54 -19 25 18.6 U I52
2018-04-21 10:31:32 C 14 05 23.80 -19 24 41.6 U T05
2018-04-21 10:31:45 C 14 04 56.47 -19 25 24.0 U I52
2018-04-21 10:32:00 C 14 04 56.35 -19 25 29.8 U I52
2018-04-21 10:32:16 C 14 04 56.27 -19 25 34.4 U I52
2018-04-21 10:32:51 C 14 05 23.28 -19 25 09.0 U T05
2018-04-21 10:47:10 C 14 05 17.86 -19 30 01.7 U T05
2018-04-21 11:10:45 C 14 05 08.87 -19 38 05.2 U T05
2018-04-21 12:25:52 C 14 05 17.59 -19 53 41.6 U Q62
2018-04-21 12:31:31 C 14 05 15.66 -19 55 31.1 U Q62
2018-04-21 12:37:06 C 14 05 13.81 -19 57 18.7 U Q62
2018-04-21 14:45:29 C 14 04 40.60 -20 45 31.7 r P93
2018-04-21 14:48:49 C 14 04 39.56 -20 46 28.2 r P93
2018-04-21 14:52:09 C 14 04 38.52 -20 47 23.7 r P93
2018-04-21 15:07:11 C 14 04 32.35 -20 51 37.6 q 900
2018-04-21 15:14:25 C 14 04 30.14 -20 53 36.2 q 900
2018-04-21 15:21:42 C 14 04 27.96 -20 55 34.7 q 900
2018-04-21 15:23:34 C 14 04 19.54 -20 46 31.8 q Q62
2018-04-21 15:28:09 C 14 04 18.13 -20 47 46.1 q Q62
2018-04-21 15:32:37 C 14 04 16.83 -20 48 58.0 q Q62
2018-04-21 15:46:13 C 14 04 12.83 -20 52 36.5 q Q62
2018-04-21 21:57:38 C 14 03 41.91 -22 29 26.0 d L01
2018-04-21 21:59:24 C 14 03 41.52 -22 29 47.5 d L01
2018-04-21 22:01:10 C 14 03 41.13 -22 30 09.7 d L01
2018-04-21 22:02:56 C 14 03 40.71 -22 30 31.8 d L01
2018-04-21 22:04:55 C 14 03 40.25 -22 30 55.5 d L01
2018-04-21 22:38:49 C 14 03 31.96 -22 37 57.9 q 246
2018-04-21 22:39:11 C 14 03 31.92 -22 38 01.9 q 246
2018-04-21 22:39:26 C 14 03 31.87 -22 38 06.0 q 246
2018-04-21 22:40:09 C 14 03 31.72 -22 38 14.5 q 246
2018-04-21 22:59:18 C 14 03 27.90 -22 41 51.1 q 595
2018-04-21 23:11:11 C 14 03 25.19 -22 44 10.1 q 595
2018-04-22 06:12:30 C 14 02 49.05 -23 54 51.5 U I52
2018-04-22 06:12:46 C 14 02 48.98 -23 54 54.6 U I52
2018-04-22 06:13:01 C 14 02 48.92 -23 54 57.2 U I52
2018-04-22 06:13:17 C 14 02 48.93 -23 54 59.3 U I52
2018-04-22 14:09:52 C 14 02 00.47 -24 51 21.8 q E23
2018-04-22 14:27:22 C 14 01 57.52 -24 53 21.7 q E23
2018-04-22 14:51:22 C 14 01 53.52 -24 56 04.8 q E23
2018-04-24 05:45:02 C 14 00 18.77 -27 45 27.6 U I52
2018-04-24 05:46:07 C 14 00 18.66 -27 45 31.0 U I52
2018-04-24 05:49:48 C 14 00 18.33 -27 45 40.8 U I52
2018-04-24 05:50:53 C 14 00 18.28 -27 45 41.9 U I52