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
2018-04-21 03:57:02 C 12 34 47.44 -13 47 55.1 U I52
2018-04-21 03:57:38 C 12 34 47.27 -13 47 56.8 U I52
2018-04-21 03:58:14 C 12 34 47.12 -13 47 57.7 U I52
2018-04-23 05:15:19 C 12 20 29.43 -16 22 02.4 U I52
2018-04-23 05:15:40 C 12 20 29.29 -16 22 03.1 U I52
2018-04-23 05:16:01 C 12 20 29.19 -16 22 04.4 U I52
2018-04-25 01:42:45 C 12 03 53.61 -19 13 09.6 U 807
2018-04-25 01:44:30 C 12 03 52.84 -19 13 17.2 U 807
2018-04-25 01:46:29 C 12 03 51.96 -19 13 25.7 U 807
2023-03-26 11:49:13 C 13 29 08.680 -02 28 51.94 V F51
2023-03-28 09:56:52 C 13 27 46.070 -02 43 57.05 V F51
2023-03-28 10:13:40 C 13 27 45.449 -02 44 02.51 V F51
2023-03-28 10:30:35 C 13 27 44.788 -02 44 08.66 V F51
2023-03-28 10:47:26 C 13 27 44.178 -02 44 14.56 V F51
2023-04-13 09:05:12 C 13 01 41.762 -06 46 50.07 V F52
2023-04-13 09:23:36 C 13 01 39.386 -06 47 10.47 V F52
2023-04-19 06:54:02 C 12 39 24.091 -10 12 53.35 V G96
2023-04-19 07:01:27 C 12 39 22.468 -10 13 07.10 V G96
2023-04-19 07:08:52 C 12 39 20.891 -10 13 21.11 V G96
2023-04-19 07:16:17 C 12 39 19.307 -10 13 35.00 V G96
2023-04-19 08:03:09 C 12 39 09.212 -10 15 02.74 V I52
2023-04-19 08:04:30 C 12 39 08.924 -10 15 05.33 V I52
2023-04-19 08:05:51 C 12 39 08.644 -10 15 08.53 V I52
2023-04-19 08:07:12 C 12 39 08.327 -10 15 10.69 V I52
2023-05-02 04:09:02 C 10 12 07.52 -28 54 32.7 o 291
2023-05-02 04:14:59 C 10 12 01.45 -28 55 03.1 o 291
2023-05-02 04:20:57 C 10 11 55.43 -28 55 33.8 o 291