1998 EP4

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.4412437287 ± 2.79e-07
Semi-major axis (a)1.5598003366 AU ± 3.66e-07
Inclination (i)7.19070180° ± 4.32e-05
Long. of Asc. Node (Ω)352.69975340° ± 4.25e-05
Arg. of Perihelion (ω)266.59320739° ± 1.02e-04
Mean Anomaly (M)39.27227546° ± 1.65e-03
Mean Motion (n)0.5059513529°/day ± 1.78e-07
Perihelion dist (q)0.87154822 AU ± 4.80e-07
Aphelion dist (Q)2.24805245 AU ± 6.83e-07
Orbital Period1.94806532 yr ± 6.85e-07
Physical Parameters
H (abs. magnitude)21.50
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.549″
Uncertainty1
Orbit TypeApollo
MOID0.062471 AU
Observations Used71
Oppositions1
Arc Total1996-1998
First Observation Used1996-09-20
Last Observation Used1998-04-05
Observations (72)
Date Type RA Dec Mag Band Observatory
1998-03-25 01:16:07 C 11 39 29.09 -09 45 38.6 z 118
1998-03-25 01:21:47 C 11 39 28.24 -09 45 53.7 z 118
1998-03-26 22:28:48 C 11 32 17.72 -11 57 26.5 046
1998-03-26 22:30:31 C 11 32 17.40 -11 57 32.0 046
1998-03-26 22:31:48 C 11 32 17.16 -11 57 35.7 046
1998-03-27 13:06:09 C 11 29 41.62 -12 43 19.5 426
1998-03-27 13:11:46 C 11 29 40.48 -12 43 38.3 426
1998-03-27 13:24:47 C 11 29 37.83 -12 44 21.3 426
1998-03-27 13:29:55 C 11 29 36.81 -12 44 38.2 426
1998-03-29 10:41:09 C 11 20 27.98 -15 27 45.8 422
1998-03-29 10:43:26 C 11 20 27.50 -15 27 55.5 422
1998-03-29 10:45:45 C 11 20 26.93 -15 28 04.3 422
1998-04-01 15:17:15 C 10 59 57.44 -21 13 55.7 422
1998-04-01 15:19:14 C 10 59 56.78 -21 14 05.1 422
1998-04-01 15:21:10 C 10 59 56.15 -21 14 15.1 422
1998-04-05 10:29:02 C 10 22 57.90 -30 26 01.0 426
1998-04-05 10:35:02 C 10 22 54.63 -30 26 42.7 426
1998-04-05 10:40:03 C 10 22 51.92 -30 27 17.4 426
1998-04-05 10:47:09 C 10 22 47.95 -30 28 07.7 426
1998-04-05 11:49:00 C 10 22 12.01 -30 35 19.8 422
1998-04-05 11:50:26 C 10 22 11.14 -30 35 29.7 422
1998-04-05 11:52:28 C 10 22 09.84 -30 35 38.6 422