2001 HL31

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.7867437000
Semi-major axis (a)2.4696773000 AU
Inclination (i)13.52569000° ± 4.00e+00
Long. of Asc. Node (Ω)31.15899000° ± 5.00e+00
Arg. of Perihelion (ω)294.09106000°
Mean Anomaly (M)96.15723000°
Mean Motion (n)0.2539473900°/day
Perihelion dist (q)0.52667420 AU
Aphelion dist (Q)4.41268040 AU
Orbital Period3.88114900 yr
Physical Parameters
H (abs. magnitude)20.27
G (slope)0.15
Orbit Solution
SourceMPC
Solution Date
RMS Residual0.670″
Uncertainty0
Orbit TypeApollo
MOID0.075505 AU
Observations Used105
Oppositions2
Arc Total2001-2025
First Observation Used
Last Observation Used2025-01-05
Observations (72)
Date Type RA Dec Mag Band Observatory
2001-05-02 16:01:38 C 15 31 16.75 -31 00 08.4 428
2001-05-02 16:03:44 C 15 31 16.68 -31 00 22.3 428
2001-05-02 16:08:03 C 15 31 16.40 -31 00 50.7 428
2001-05-03 14:17:09 C 15 30 23.73 -33 46 32.0 428
2001-05-03 14:18:48 C 15 30 23.63 -33 46 44.7 428
2001-05-04 17:18:42 C 15 28 43.45 -38 02 28.0 428
2001-05-04 17:20:06 C 15 28 43.30 -38 02 43.6 428
2001-05-04 17:21:29 C 15 28 43.15 -38 02 58.1 428
2001-05-04 17:22:50 C 15 28 43.02 -38 03 12.8 428
2001-05-04 17:24:13 C 15 28 42.91 -38 03 27.0 428
2001-05-04 17:30:52 C 15 28 42.32 -38 04 38.4 428
2001-05-06 13:53:51 C 15 23 50.51 -48 26 19.9 428
2001-05-06 13:55:52 C 15 23 50.04 -48 26 54.5 428
2001-05-06 14:06:52 C 15 23 47.55 -48 30 11.5 428
2001-05-06 14:07:53 C 15 23 47.36 -48 30 30.0 428
2001-05-06 14:09:16 C 15 23 47.15 -48 30 54.6 428
2001-05-07 14:41:02 C 15 17 45.62 -57 00 10.1 428
2001-05-07 15:01:07 C 15 17 37.33 -57 08 07.5 428
2001-05-07 15:03:47 C 15 17 36.30 -57 09 11.2 428
2001-05-08 14:16:35 C 15 04 24.95 -67 44 47.9 428
2001-05-08 14:20:37 C 15 04 20.86 -67 46 50.1 428
2001-05-08 14:23:15 C 15 04 18.00 -67 48 12.2 428