2018 HR

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.3414116874 ± 5.72e-04
Semi-major axis (a)1.4754533036 AU ± 1.31e-03
Inclination (i)16.99666517° ± 2.11e-02
Long. of Asc. Node (Ω)210.30711276° ± 2.90e-04
Arg. of Perihelion (ω)306.44457975° ± 1.72e-02
Mean Anomaly (M)110.87725059° ± 2.09e+00
Mean Motion (n)0.5499510967°/day ± 7.33e-04
Perihelion dist (q)0.97171630 AU ± 1.21e-03
Aphelion dist (Q)1.97919031 AU ± 1.95e-03
Orbital Period1.79220714 yr ± 2.39e-03
Physical Parameters
H (abs. magnitude)25.50
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.490″
Uncertainty4
Orbit TypeApollo
MOID0.064048 AU
Observations Used25
Oppositions1
Arc Total2018-2018
First Observation Used2018-04-19
Last Observation Used2018-04-23
Observations (25)
Date Type RA Dec Mag Band Observatory
2018-04-19 08:46:31 C 13 59 45.64 -17 03 53.0 U G96
2018-04-19 08:53:55 C 13 59 47.30 -17 02 38.0 U G96
2018-04-19 09:01:20 C 13 59 48.95 -17 01 23.9 U G96
2018-04-19 09:08:44 C 13 59 50.63 -17 00 09.6 U G96
2018-04-19 10:03:25 C 14 00 03.06 -16 51 02.8 U I52
2018-04-19 10:05:15 C 14 00 03.48 -16 50 44.3 U I52
2018-04-19 10:07:03 C 14 00 03.88 -16 50 26.6 U I52
2018-04-19 10:08:53 C 14 00 04.31 -16 50 08.8 U I52
2018-04-20 07:00:39 C 14 05 07.32 -13 30 55.8 U I52
2018-04-20 07:03:02 C 14 05 07.77 -13 30 33.4 U I52
2018-04-20 07:05:25 C 14 05 08.26 -13 30 11.6 U I52
2018-04-20 07:07:48 C 14 05 08.71 -13 29 50.4 U I52
2018-04-20 23:58:18 C 14 08 44.36 -11 00 31.2 S L01
2018-04-21 00:01:46 C 14 08 45.00 -10 59 59.8 S L01
2018-04-21 00:07:56 C 14 08 46.23 -10 59 07.3 S L01
2018-04-21 07:07:15 C 14 10 12.72 -09 59 43.6 U I52
2018-04-21 07:08:38 C 14 10 12.94 -09 59 32.5 U I52
2018-04-21 07:10:01 C 14 10 13.23 -09 59 20.9 U I52
2018-04-21 23:37:37 C 14 13 20.68 -07 46 55.9 U 204
2018-04-22 00:00:37 C 14 13 24.38 -07 43 57.3 U 204
2018-04-22 00:23:36 C 14 13 28.09 -07 40 58.3 U 204
2018-04-23 08:22:32 C 14 18 51.79 -03 48 51.6 U I52
2018-04-23 08:24:56 C 14 18 52.10 -03 48 35.6 U I52
2018-04-23 08:27:18 C 14 18 52.45 -03 48 19.6 U I52
2018-04-23 08:29:42 C 14 18 52.75 -03 48 03.5 U I52