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
1998-05-07 20:09:23 C 16 47 00.07 +36 22 20.5 z 540
1998-05-07 20:11:23 C 16 47 04.45 +36 23 25.8 z 540
1998-05-07 20:13:23 C 16 47 08.93 +36 24 31.2 z 540
1998-05-07 20:15:23 C 16 47 13.34 +36 25 36.4 z 540
1998-05-07 20:17:23 C 16 47 17.76 +36 26 41.2 z 540
1998-05-07 22:34:34 C 16 52 30.02 +37 41 45.8 z 104
1998-05-07 22:36:20 C 16 52 34.06 +37 42 43.4 z 104
1998-05-07 22:38:40 C 16 52 39.45 +37 44 00.3 z 104
1998-05-07 22:39:59 C 16 52 42.53 +37 44 43.6 z 104
1998-05-07 22:41:34 C 16 52 46.21 +37 45 35.3 z 104
1998-05-07 22:43:00 C 16 52 49.46 +37 46 22.0 z 104
1998-05-07 22:44:40 C 16 52 53.33 +37 47 16.3 z 104
1998-05-07 22:46:10 C 16 52 56.80 +37 48 05.0 z 104
1998-05-07 22:47:45 C 16 53 00.48 +37 48 57.2 z 104
1998-05-08 00:02:14 C 16 55 53.71 +38 29 14.7 046
1998-05-08 00:03:32 C 16 55 56.82 +38 29 57.4 046
1998-05-08 00:05:07 C 16 56 00.56 +38 30 48.7 046
1998-05-08 00:07:24 C 16 56 06.07 +38 32 04.7 046
1998-05-08 00:09:00 C 16 56 09.85 +38 32 56.9 046
1998-05-08 00:09:50 C 16 56 11.78 +38 33 23.5 046
1998-05-08 00:10:37 C 16 56 13.68 +38 33 49.6 046
1998-05-08 00:11:01 C 16 56 14.65 +38 34 02.8 046
1998-05-08 01:26:32 C 16 59 16.06 +39 15 02.8 118
1998-05-08 01:32:43 C 16 59 31.23 +39 18 23.6 118
1998-05-08 01:36:14 C 16 59 39.89 +39 20 18.4 118
1998-05-08 07:10:11 C 17 14 49.26 +42 21 32.9 z 700
1998-05-08 07:11:40 C 17 14 53.44 +42 22 23.5 z 700
1998-05-08 07:16:02 C 17 15 05.76 +42 24 46.1 z 700
1998-05-08 19:56:47 C 17 56 43.45 +48 53 13.5 z 540
1998-05-08 19:58:47 C 17 56 51.04 +48 54 11.8 z 540
1998-05-08 20:00:48 C 17 56 58.24 +48 55 08.8 z 540
1998-05-08 20:02:48 C 17 57 06.03 +48 56 09.5 z 540
1998-05-08 21:47:05 C 18 03 39.16 +49 46 00.7 b 611
1998-05-08 21:48:04 C 18 03 42.95 +49 46 29.1 b 611
1998-05-08 21:49:05 C 18 03 46.67 +49 46 56.5 b 611
1998-05-08 21:50:04 C 18 03 50.67 +49 47 25.9 b 611
1998-05-08 21:51:04 C 18 03 54.57 +49 47 54.9 b 611
1998-05-08 21:52:05 C 18 03 58.32 +49 48 23.3 b 611
1998-05-08 21:53:04 C 18 04 02.12 +49 48 52.0 b 611
1998-05-08 21:54:04 C 18 04 05.85 +49 49 19.7 b 611
1998-05-08 21:55:15 C 18 04 10.39 +49 49 52.9 b 611
1998-05-08 21:56:05 C 18 04 13.58 +49 50 16.1 b 611
1998-05-08 21:57:04 C 18 04 17.32 +49 50 45.1 b 611
1998-05-09 21:07:12 C 19 50 04.58 +57 34 30.0 z 540
1998-05-09 21:11:07 C 19 50 24.48 +57 35 15.5 z 540
1998-05-09 21:16:03 C 19 50 49.13 +57 36 14.1 z 540
1998-05-09 21:19:22 C 19 51 05.94 +57 36 49.3 z 540