85818 (1998 XM4)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.4160289487 ± 3.68e-09
Semi-major axis (a)1.6566352039 AU ± 1.12e-09
Inclination (i)62.71599647° ± 5.04e-07
Long. of Asc. Node (Ω)235.63985899° ± 5.34e-07
Arg. of Perihelion (ω)301.21649960° ± 1.17e-06
Mean Anomaly (M)131.39619181° ± 2.13e-06
Mean Motion (n)0.4622447073°/day ± 4.68e-10
Perihelion dist (q)0.96742700 AU ± 6.12e-09
Aphelion dist (Q)2.34584341 AU ± 6.29e-09
Orbital Period2.13226083 yr ± 2.16e-09
Physical Parameters
H (abs. magnitude)15.42
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.022″
Uncertainty0
Orbit TypeApollo
MOID0.109072 AU
Observations Used1396
Gaia Obs Used123
Oppositions13
Arc Total1993-2025
First Observation Used1993-05-24
Last Observation Used2025-10-24
Observations (1511)
Date Type RA Dec Mag Band Observatory
1993-05-24 09:17:00 18 41 42.86 +45 52 16.2 675
1993-05-24 11:02:00 18 41 28.20 +45 56 06.7 675
1993-06-15 06:49:59 17 20 40.17 +57 11 25.6 675
1993-06-15 08:44:59 17 20 22.68 +57 12 22.1 675
1998-12-10 03:22:07 C 00 42 21.16 +31 04 42.3 17.6 a 704
1998-12-10 03:37:31 C 00 42 21.07 +31 04 17.0 18.1 a 704
1998-12-10 03:52:41 C 00 42 21.11 +31 03 52.6 17.8 a 704
1998-12-10 21:51:27 C 00 42 23.35 +30 34 53.2 118
1998-12-10 21:59:04 C 00 42 23.32 +30 34 41.2 118
1998-12-10 23:10:31 C 00 42 23.47 +30 32 46.3 046
1998-12-10 23:12:07 C 00 42 23.48 +30 32 43.6 046
1998-12-10 23:14:05 C 00 42 23.51 +30 32 40.7 046
1998-12-10 23:53:33 C 00 42 23.67 +30 31 36.7 557
1998-12-10 23:56:55 C 00 42 23.60 +30 31 31.1 557
1998-12-11 01:57:37 C 00 42 24.39 +30 28 21.4 734
1998-12-11 02:15:59 C 00 42 24.55 +30 27 50.6 658
1998-12-11 02:18:24 C 00 42 24.54 +30 27 46.9 658
1998-12-11 02:18:42 C 00 42 24.35 +30 27 47.9 734
1998-12-11 02:20:24 C 00 42 24.53 +30 27 43.9 658
1998-12-11 11:14:09 C 00 42 26.32 +30 13 42.4 b 426
1998-12-11 11:22:11 C 00 42 26.31 +30 13 28.7 b 426
1998-12-11 11:27:09 C 00 42 26.31 +30 13 21.5 b 426
1998-12-11 22:37:11 C 00 42 29.00 +29 55 29.2 557
1998-12-11 22:39:00 C 00 42 29.04 +29 55 26.3 557
1998-12-11 22:40:52 C 00 42 28.99 +29 55 23.4 557
1998-12-11 22:42:42 C 00 42 29.06 +29 55 20.0 557
1998-12-12 12:42:08 C 00 42 33.53 +29 33 20.5 z 402
1998-12-12 12:44:08 C 00 42 33.59 +29 33 17.6 z 402
1998-12-12 12:46:08 C 00 42 33.55 +29 33 14.1 z 402
1998-12-12 17:05:21 C 00 42 35.66 +29 26 29.0 z 104
1998-12-12 17:07:49 C 00 42 35.61 +29 26 24.8 z 104
1998-12-12 17:10:39 C 00 42 35.54 +29 26 19.8 z 104
1998-12-12 17:46:35 C 00 42 35.76 +29 25 23.0 046
1998-12-12 17:50:09 C 00 42 35.69 +29 25 17.6 046
1998-12-12 17:52:11 C 00 42 35.72 +29 25 14.1 046
1998-12-12 17:54:10 C 00 42 35.77 +29 25 11.6 046
1998-12-12 17:56:09 C 00 42 35.73 +29 25 08.3 046
1998-12-12 20:44:06 C 00 42 36.58 +29 20 44.5 118
1998-12-12 20:53:26 C 00 42 36.59 +29 20 30.4 118
1998-12-12 20:58:31 C 00 42 36.63 +29 20 22.3 118
1998-12-13 00:55:28 C 00 42 38.54 +29 14 15.4 18.2 725
1998-12-13 01:16:19 C 00 42 38.69 +29 13 42.5 18.3 725
1998-12-13 01:28:05 C 00 42 38.72 +29 13 24.0 734
1998-12-13 01:30:53 C 00 42 38.82 +29 13 20.8 18.4 a 704
1998-12-13 01:40:45 C 00 42 38.91 +29 13 05.8 18.9 a 704
1998-12-13 01:50:36 C 00 42 38.89 +29 12 49.1 18.6 a 704
1998-12-13 01:52:16 C 00 42 38.77 +29 12 46.3 734
1998-12-13 02:00:26 C 00 42 38.88 +29 12 35.4 18.6 a 704
1998-12-13 02:10:47 C 00 42 39.21 +29 12 17.3 20.0 a 704
1998-12-13 02:20:38 C 00 42 39.19 +29 12 03.7 19.1 a 704