2018 HD1

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.5034481856
Semi-major axis (a)1.9057700102 AU
Inclination (i)1.49648060° ± 4.00e+00
Long. of Asc. Node (Ω)50.67288370° ± 5.00e+00
Arg. of Perihelion (ω)120.24578333° ± 6.00e+00
Mean Anomaly (M)329.57571270°
Mean Motion (n)0.3746218000°/day
Perihelion dist (q)0.94631280 AU
Aphelion dist (Q)2.86525820 AU
Orbital Period2.63094050 yr
Physical Parameters
H (abs. magnitude)27.47
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-04-18
RMS Residual0.620″
Uncertainty
Orbit TypeApollo
MOID0.011338 AU
Observations Used21
Oppositions1
Arc Total
First Observation Used
Last Observation Used2018-04-22
Observations (21)
Date Type RA Dec Mag Band Observatory
2018-04-20 10:14:12 C 14 50 27.45 +08 33 01.9 V G96
2018-04-20 10:21:36 C 14 50 31.37 +08 30 47.0 V G96
2018-04-20 10:36:20 C 14 50 39.29 +08 26 21.7 V G96
2018-04-21 08:50:47 C 15 02 19.19 +02 46 34.0 U G96
2018-04-21 08:58:12 C 15 02 21.82 +02 44 59.1 U G96
2018-04-21 09:05:38 C 15 02 24.47 +02 43 20.4 U G96
2018-04-21 09:13:04 C 15 02 27.16 +02 41 43.7 U G96
2018-04-21 11:06:06 C 15 03 07.82 +02 17 30.9 U I52
2018-04-21 11:07:56 C 15 03 08.48 +02 17 06.6 U I52
2018-04-21 11:09:43 C 15 03 09.10 +02 16 44.4 U I52
2018-04-21 11:11:31 C 15 03 09.77 +02 16 20.9 U I52
2018-04-22 00:28:47 C 15 08 30.06 -00 19 01.6 20.3 U 104
2018-04-22 00:43:40 C 15 08 34.40 -00 21 39.9 U 104
2018-04-22 00:51:02 C 15 08 36.57 -00 22 58.4 20.3 U 104
2018-04-22 07:31:52 C 15 10 57.95 -01 30 20.3 U G96
2018-04-22 07:33:11 C 15 10 58.34 -01 30 33.7 U G96
2018-04-22 07:35:51 C 15 10 58.92 -01 31 00.4 U G96
2018-04-22 08:03:11 C 15 11 04.95 -01 35 33.3 U H01
2018-04-22 08:08:42 C 15 11 06.36 -01 36 26.8 U H01
2018-04-22 08:32:21 C 15 11 12.37 -01 40 16.1 U H01
2018-04-22 08:39:40 C 15 11 14.23 -01 41 26.5 U H01