2018 HC

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.7331065410 ± 1.71e-07
Semi-major axis (a)2.9216090108 AU ± 1.36e-07
Inclination (i)9.85560677° ± 2.86e-05
Long. of Asc. Node (Ω)13.29720526° ± 7.03e-05
Arg. of Perihelion (ω)269.75476478° ± 5.45e-05
Mean Anomaly (M)175.03380769° ± 6.88e-06
Mean Motion (n)0.1973690875°/day ± 1.38e-08
Perihelion dist (q)0.77975833 AU ± 5.00e-07
Aphelion dist (Q)5.06345969 AU ± 5.52e-07
Orbital Period4.99382297 yr ± 3.48e-07
Physical Parameters
H (abs. magnitude)22.91
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.281″
Uncertainty0
Orbit TypeApollo
MOID0.076946 AU
Observations Used76
Oppositions8
Arc Total2013-2023
First Observation Used2013-04-05
Last Observation Used2023-05-02
Observations (77)
Date Type RA Dec Mag Band Observatory
2013-04-05 10:41:12 C 12 41 42.516 +01 13 12.65 V F51
2013-04-05 10:57:12 C 12 41 40.757 +01 13 10.46 V F51
2013-04-10 08:58:55 C 12 27 37.572 +00 49 10.05 V F51
2013-04-10 09:14:40 C 12 27 35.330 +00 49 05.89 V F51
2013-04-11 08:48:49 C 12 24 19.108 +00 42 34.71 V F51
2013-04-11 09:08:31 C 12 24 16.150 +00 42 28.87 V F51
2013-04-11 09:28:12 C 12 24 13.197 +00 42 23.03 V F51
2013-04-11 09:48:02 C 12 24 10.214 +00 42 17.28 V F51
2013-04-17 07:25:01 C 12 00 30.292 -00 13 48.88 V F51
2018-04-12 11:47:16 C 13 09 29.536 -07 22 00.47 V F52
2018-04-12 12:01:36 C 13 09 27.852 -07 22 17.28 V F52
2018-04-16 07:34:01 C 12 57 44.38 -09 33 15.4 U G96
2018-04-16 07:41:23 C 12 57 43.15 -09 33 27.8 U G96
2018-04-16 07:56:10 C 12 57 40.75 -09 33 53.2 U G96
2018-04-16 09:10:30 C 12 57 28.65 -09 35 58.8 U I52
2018-04-16 09:11:36 C 12 57 28.48 -09 36 00.8 U I52
2018-04-16 09:12:42 C 12 57 28.31 -09 36 02.2 U I52
2018-04-16 09:13:48 C 12 57 28.11 -09 36 04.4 U I52
2018-04-16 22:06:41 C 12 55 28.81 -09 58 44.6 U Z84
2018-04-16 22:20:21 C 12 55 26.46 -09 59 09.4 U Z84
2018-04-16 22:34:04 C 12 55 24.10 -09 59 33.9 U Z84
2018-04-16 22:47:58 C 12 55 21.70 -09 59 59.2 U Z84
2018-04-17 05:21:27 C 12 54 16.49 -10 12 01.4 u H21
2018-04-17 05:24:13 C 12 54 16.00 -10 12 06.1 u H21
2018-04-17 05:29:37 C 12 54 15.05 -10 12 16.2 u H21
2018-04-17 21:05:21 C 12 51 34.96 -10 42 12.9 19.5 U 104
2018-04-17 21:23:26 C 12 51 31.55 -10 42 49.0 U 104
2018-04-17 21:31:21 C 12 51 30.01 -10 43 07.8 S 033
2018-04-17 21:34:56 C 12 51 29.35 -10 43 14.9 S 033
2018-04-17 21:38:31 C 12 51 28.68 -10 43 22.0 S 033
2018-04-17 21:42:22 C 12 51 27.95 -10 43 29.7 S 033
2018-04-17 21:48:42 C 12 51 26.90 -10 43 39.3 20.0 U 104
2018-04-17 22:05:04 C 12 51 23.58 -10 44 14.3 q 246
2018-04-17 22:05:41 C 12 51 23.55 -10 44 15.4 q 246
2018-04-17 22:06:29 C 12 51 23.37 -10 44 17.3 q 246
2018-04-17 22:10:18 C 12 51 22.48 -10 44 25.0 q 246
2018-04-17 22:12:08 C 12 51 22.38 -10 44 28.2 q 246
2018-04-17 22:13:21 C 12 51 22.02 -10 44 30.6 q 246
2018-04-18 07:57:46 C 12 49 34.35 -11 04 09.4 U I52
2018-04-18 08:00:26 C 12 49 33.80 -11 04 14.3 U I52
2018-04-18 08:03:41 C 12 49 33.16 -11 04 22.1 U I52
2018-04-18 08:06:57 C 12 49 32.48 -11 04 29.0 U I52
2018-04-20 04:36:26 C 12 40 24.51 -12 46 06.9 U I52
2018-04-20 04:37:01 C 12 40 24.35 -12 46 08.7 U I52
2018-04-20 04:37:37 C 12 40 24.22 -12 46 10.0 U I52
2018-04-20 04:38:13 C 12 40 24.03 -12 46 11.2 U I52
2018-04-20 05:54:50 C 12 40 03.46 -12 48 30.0 U 807
2018-04-20 05:57:17 C 12 40 02.88 -12 48 36.3 U 807
2018-04-20 05:59:45 C 12 40 02.28 -12 48 42.3 U 807
2018-04-21 03:56:26 C 12 34 47.54 -13 47 53.7 U I52