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
1998-05-01 06:15:00 C 14 48 42.58 -05 14 03.1 z 670
1998-05-01 06:18:13 C 14 48 41.81 -05 13 53.5 b 713
1998-05-01 06:31:59 C 14 48 46.08 -05 12 26.8 z 670
1998-05-01 06:41:44 C 14 48 46.64 -05 11 39.9 b 713
1998-05-01 07:12:17 C 14 48 52.95 -05 08 45.2 b 713
1998-05-01 07:22:29 C 14 48 55.06 -05 07 47.2 b 713
1998-05-01 07:50:30 C 14 49 00.92 -05 05 05.4 b 713
1998-05-01 08:08:23 C 14 49 09.88 -05 02 53.3 c 566
1998-05-01 08:16:27 C 14 49 06.35 -05 02 35.6 b 713
1998-05-01 08:34:21 C 14 49 10.02 -05 00 53.4 b 713
1998-05-01 08:37:45 C 14 49 16.04 -05 00 04.4 c 566
1998-05-01 09:06:31 C 14 49 22.02 -04 57 17.5 c 566
1998-05-02 07:17:24 C 14 55 07.26 -02 33 20.8 z 700
1998-05-02 07:23:27 C 14 55 08.89 -02 32 37.4 z 700
1998-05-02 07:29:09 C 14 55 10.40 -02 31 57.0 z 700
1998-05-02 08:00:27 C 14 55 18.78 -02 28 07.3 z 700
1998-05-02 08:11:10 C 14 55 21.66 -02 26 48.5 z 700
1998-05-02 08:18:54 C 14 55 23.71 -02 25 51.8 z 700
1998-05-03 01:43:53 C 15 00 58.95 -00 05 29.8 118
1998-05-03 01:45:59 C 15 00 59.66 -00 05 11.5 118
1998-05-03 01:50:56 C 15 01 01.31 -00 04 27.1 118
1998-05-03 02:06:16 C 15 01 06.47 -00 02 10.7 118
1998-05-03 02:50:47 C 15 01 27.70 +00 06 58.1 860
1998-05-03 02:53:45 C 15 01 28.69 +00 07 24.4 860
1998-05-03 03:00:26 C 15 01 30.96 +00 08 25.9 860
1998-05-03 03:21:22 C 15 01 37.74 +00 11 34.2 860
1998-05-03 03:31:05 C 15 01 40.93 +00 13 03.8 860
1998-05-03 15:46:45 C 15 06 26.78 +02 10 08.7 360
1998-05-03 15:49:45 C 15 06 27.95 +02 10 40.3 360
1998-05-03 15:52:14 C 15 06 28.89 +02 11 06.1 360
1998-05-03 20:33:08 C 15 08 35.02 +03 00 49.3 557
1998-05-03 20:36:18 C 15 08 36.36 +03 01 24.4 557
1998-05-03 20:38:29 C 15 08 37.31 +03 01 48.5 557
1998-05-03 20:42:09 C 15 08 38.86 +03 02 29.1 557
1998-05-03 22:46:31 C 15 09 31.95 +03 25 45.3 046
1998-05-03 22:47:53 C 15 09 32.48 +03 25 59.7 046
1998-05-03 22:48:57 C 15 09 32.99 +03 26 12.8 046
1998-05-03 22:50:02 C 15 09 33.44 +03 26 24.9 046
1998-05-03 22:51:10 C 15 09 33.93 +03 26 37.5 046
1998-05-04 16:26:11 C 15 18 32.24 +07 09 54.0 z 402
1998-05-04 16:26:50 C 15 18 32.60 +07 10 03.5 z 402
1998-05-04 16:27:31 C 15 18 32.96 +07 10 13.1 z 402
1998-05-04 16:28:11 C 15 18 33.32 +07 10 22.5 z 402
1998-05-05 06:27:04 C 15 27 35.89 +10 46 35.0 z 700
1998-05-05 06:33:59 C 15 27 40.50 +10 48 32.8 z 700
1998-05-05 06:38:18 C 15 27 43.43 +10 49 45.6 z 700
1998-05-06 20:52:54 C 16 05 52.49 +24 43 31.1 z 620
1998-05-06 20:55:05 C 16 05 55.34 +24 44 31.8 z 620
1998-05-06 20:56:55 C 16 05 57.90 +24 45 21.5 z 620
1998-05-06 21:04:14 C 16 06 07.79 +24 48 44.3 z 620