1998 HT31

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.6973893215
Semi-major axis (a)2.5280971209 AU
Inclination (i)6.81154169°
Long. of Asc. Node (Ω)213.36709340°
Arg. of Perihelion (ω)80.78824248°
Mean Anomaly (M)291.08247415°
Mean Motion (n)0.2451980400°/day
Perihelion dist (q)0.76503160 AU
Aphelion dist (Q)4.29113500 AU
Orbital Period4.01963920 yr
Physical Parameters
H (abs. magnitude)20.80
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-04-18
RMS Residual0.832″
Uncertainty
Orbit TypeApollo
MOID0.030271 AU
Observations Used142
Oppositions1
Arc Total1998-1998
First Observation Used
Last Observation Used1998-05-09
Observations (147)
Date Type RA Dec Mag Band Observatory
1998-04-21 07:09:54 C 14 22 45.55 -15 33 19.8 17.6 a 704
1998-04-21 07:38:56 C 14 22 46.67 -15 32 46.6 18.1 a 704
1998-04-21 08:08:06 C 14 22 47.90 -15 32 14.2 18.4 a 704
1998-04-21 09:06:57 C 14 22 50.29 -15 31 06.6 19.0 a 704
1998-04-22 06:11:08 C 14 24 02.06 -15 05 40.5 17.6 a 704
1998-04-22 06:38:17 C 14 24 03.31 -15 05 06.9 18.3 a 704
1998-04-22 07:05:28 C 14 24 04.68 -15 04 33.8 18.3 a 704
1998-04-22 07:32:45 C 14 24 05.80 -15 03 57.7 18.0 a 704
1998-04-22 08:00:15 C 14 24 07.05 -15 03 22.0 a 704
1998-04-29 13:47:11 C 14 40 49.32 -08 25 45.7 c 566
1998-04-29 14:16:21 C 14 40 53.61 -08 23 48.6 c 566
1998-04-29 14:51:37 C 14 40 58.90 -08 21 26.3 c 566
1998-04-30 01:55:52 C 14 42 54.52 -07 35 37.0 046
1998-04-30 01:57:17 C 14 42 54.75 -07 35 30.7 046
1998-04-30 01:58:41 C 14 42 55.00 -07 35 24.6 046
1998-04-30 01:59:43 C 14 42 55.14 -07 35 20.1 046
1998-04-30 02:34:07 C 14 43 00.76 -07 32 42.9 c 106
1998-04-30 02:42:53 C 14 43 02.21 -07 32 03.3 c 106
1998-04-30 02:45:22 C 14 43 02.70 -07 31 53.4 c 106
1998-04-30 07:59:45 C 14 44 07.40 -07 07 42.5 c 566
1998-04-30 08:29:55 C 14 44 12.44 -07 05 23.5 c 566
1998-04-30 08:59:06 C 14 44 17.29 -07 03 08.2 c 566
1998-04-30 13:15:48 C 14 45 00.45 -06 42 45.4 c 566
1998-04-30 13:44:35 C 14 45 05.53 -06 40 25.1 c 566
1998-04-30 14:14:17 C 14 45 10.90 -06 37 59.2 c 566
1998-04-30 19:37:57 C 14 46 24.89 -06 11 34.2 046
1998-04-30 19:38:59 C 14 46 25.16 -06 11 27.8 046
1998-04-30 19:40:59 C 14 46 25.44 -06 11 17.9 046
1998-04-30 19:41:57 C 14 46 25.66 -06 11 13.2 046
1998-04-30 19:43:03 C 14 46 25.86 -06 11 07.8 046
1998-04-30 20:11:49 C 14 46 32.68 -06 08 28.8 z 620
1998-04-30 20:16:29 C 14 46 33.58 -06 08 05.0 z 620
1998-04-30 20:19:30 C 14 46 34.17 -06 07 49.7 z 620
1998-04-30 20:23:29 C 14 46 34.98 -06 07 28.4 z 620
1998-04-30 20:30:50 C 14 46 36.42 -06 06 51.4 z 620
1998-04-30 20:43:20 C 14 46 38.79 -06 05 46.3 z 620
1998-04-30 21:03:19 C 14 46 41.43 -06 04 16.1 557
1998-04-30 21:05:11 C 14 46 41.80 -06 04 06.5 557
1998-04-30 21:07:01 C 14 46 42.15 -06 03 56.8 557
1998-04-30 21:08:53 C 14 46 42.51 -06 03 47.0 557
1998-04-30 21:10:43 C 14 46 42.86 -06 03 37.6 557
1998-04-30 21:12:35 C 14 46 43.22 -06 03 28.1 557
1998-05-01 01:03:17 C 14 47 28.37 -05 43 04.4 046
1998-05-01 01:04:22 C 14 47 28.60 -05 42 58.3 046
1998-05-01 01:05:20 C 14 47 28.79 -05 42 53.3 046
1998-05-01 02:13:05 C 14 47 47.45 -05 34 53.8 860
1998-05-01 02:16:11 C 14 47 48.06 -05 34 36.2 860
1998-05-01 02:19:06 C 14 47 48.68 -05 34 20.6 860
1998-05-01 05:55:00 C 14 48 38.39 -05 15 55.8 z 670
1998-05-01 06:04:59 C 14 48 40.51 -05 14 59.3 z 670