1998 OP4

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.5369842911
Semi-major axis (a)2.2550199574 AU
Inclination (i)13.40055738°
Long. of Asc. Node (Ω)126.61721142°
Arg. of Perihelion (ω)167.73012957°
Mean Anomaly (M)20.68471228°
Mean Motion (n)0.2910573000°/day
Perihelion dist (q)1.04410740 AU
Aphelion dist (Q)3.46593240 AU
Orbital Period3.38630110 yr
Physical Parameters
H (abs. magnitude)24.00
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-04-18
RMS Residual0.728″
Uncertainty
Orbit TypeAmor
MOID0.033843 AU
Observations Used22
Oppositions1
Arc Total1998-1998
First Observation Used
Last Observation Used1998-07-31
Observations (22)
Date Type RA Dec Mag Band Observatory
1998-07-27 06:03:43 c 20 17 13.39 -01 14 47.3 i 691
1998-07-27 06:09:31 c 20 17 19.08 -01 16 13.8 i 691
1998-07-27 06:15:46 c 20 17 25.25 -01 17 47.8 i 691
1998-07-27 07:30:00 c 20 18 38.18 -01 36 21.0 i 691
1998-07-27 07:40:08 c 20 18 48.13 -01 38 52.5 i 691
1998-07-27 07:48:42 c 20 18 56.59 -01 41 01.5 i 691
1998-07-27 08:14:47 C 20 19 22.07 -01 47 31.4 a 696
1998-07-27 08:16:37 C 20 19 23.89 -01 47 59.3 a 696
1998-07-27 08:19:44 C 20 19 26.95 -01 48 45.9 a 696
1998-07-27 10:02:24 c 20 21 08.62 -02 14 24.4 i 691
1998-07-27 10:08:40 c 20 21 14.82 -02 15 58.1 i 691
1998-07-27 21:40:34 C 20 33 25.45 -05 08 37.0 z 598
1998-07-27 21:51:31 C 20 33 36.35 -05 11 17.1 z 598
1998-07-27 22:02:46 C 20 33 47.46 -05 14 06.5 z 598
1998-07-28 05:43:42 C 20 41 46.40 -07 06 32.3 a 696
1998-07-28 05:48:14 C 20 41 50.85 -07 07 38.2 a 696
1998-07-28 06:11:57 c 20 42 14.28 -07 13 26.4 i 691
1998-07-28 06:17:42 c 20 42 19.90 -07 14 50.0 i 691
1998-07-28 08:47:56 C 20 44 47.92 -07 51 24.1 673
1998-07-31 07:55:51 C 21 53 31.49 -22 31 42.2 a 696
1998-07-31 07:58:30 C 21 53 33.68 -22 32 08.5 a 696
1998-07-31 08:01:06 C 21 53 35.84 -22 32 33.6 a 696