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
1998-12-13 02:30:30 C 00 42 39.17 +29 11 46.6 19.0 a 704
1998-12-13 02:33:31 C 00 42 39.07 +29 11 42.3 18.5 725
1998-12-13 02:40:51 C 00 42 39.16 +29 11 32.1 19.3 a 704
1998-12-13 03:23:24 C 00 42 39.31 +29 10 25.6 z 711
1998-12-13 03:30:16 C 00 42 39.35 +29 10 14.7 z 711
1998-12-13 03:37:22 C 00 42 39.39 +29 10 03.9 z 711
1998-12-16 10:01:26 C 00 43 25.44 +27 10 55.2 z 402
1998-12-16 10:03:28 C 00 43 25.47 +27 10 51.2 z 402
1998-12-16 10:05:27 C 00 43 25.54 +27 10 48.5 z 402
1998-12-17 10:12:23 C 00 43 44.70 +26 35 21.2 z 402
1998-12-17 10:14:22 C 00 43 44.72 +26 35 18.0 z 402
1998-12-17 10:16:22 C 00 43 44.77 +26 35 15.0 z 402
1998-12-19 19:32:30 C 00 44 39.47 +25 13 19.2 z 587
1998-12-19 19:41:59 C 00 44 39.72 +25 13 06.9 z 587
1998-12-23 09:47:45 C 00 46 24.54 +23 16 12.4 z 402
1998-12-23 09:50:03 C 00 46 24.51 +23 16 07.4 z 402
1998-12-23 09:52:20 C 00 46 24.60 +23 16 05.4 z 402
1998-12-23 19:23:11 C 00 46 37.62 +23 03 37.0 118
1998-12-23 19:25:38 C 00 46 37.62 +23 03 33.6 118
1998-12-29 19:09:04 C 00 50 30.33 +20 06 37.0 046
1998-12-29 19:18:33 C 00 50 30.57 +20 06 24.4 046
1998-12-29 19:26:49 C 00 50 30.79 +20 06 17.3 046
1999-01-01 04:30:04 C 00 52 19.72 +19 01 45.2 a 658
1999-01-01 04:34:45 C 00 52 19.78 +19 01 40.4 a 658
1999-01-01 04:39:56 C 00 52 19.92 +19 01 34.4 a 658
1999-01-03 03:57:17 C 00 53 56.57 +18 10 30.6 658
1999-01-03 04:03:50 C 00 53 56.78 +18 10 23.6 658
1999-01-03 04:09:22 C 00 53 56.98 +18 10 17.8 658
1999-01-05 09:46:36 C 00 55 53.13 +17 14 58.7 z 402
1999-01-05 09:48:54 C 00 55 53.29 +17 14 54.9 z 402
1999-01-05 09:51:12 C 00 55 53.35 +17 14 54.3 z 402
1999-01-17 17:16:14 C 01 08 24.65 +12 54 35.7 046
1999-01-17 17:20:42 C 01 08 24.80 +12 54 33.3 046
1999-01-17 17:22:51 C 01 08 24.93 +12 54 31.6 046
1999-01-17 17:25:11 C 01 08 25.04 +12 54 31.2 046
1999-01-17 17:27:17 C 01 08 25.17 +12 54 28.0 046
1999-01-20 17:59:40 C 01 11 54.93 +12 00 56.8 046
1999-01-20 18:02:27 C 01 11 55.09 +12 00 54.7 046
1999-01-20 18:05:13 C 01 11 55.18 +12 00 52.7 046
1999-01-20 18:09:31 C 01 11 55.43 +12 00 49.6 046
1999-02-17 10:20:45 C 01 49 47.46 +06 05 51.5 360
1999-02-17 10:26:44 C 01 49 47.84 +06 05 48.0 360
1999-02-17 10:34:00 C 01 49 48.35 +06 05 45.5 360
1999-06-05 08:57:25 C 06 00 47.78 -09 37 34.3 426
1999-06-05 09:00:25 C 06 00 48.17 -09 37 34.5 426
1999-06-05 09:03:24 C 06 00 48.75 -09 37 36.4 426
1999-06-05 09:06:21 C 06 00 49.14 -09 37 38.1 426
1999-06-09 08:59:42 C 06 16 22.15 -10 26 54.5 426
1999-06-09 09:02:49 C 06 16 22.70 -10 26 55.8 426
1999-06-09 09:05:54 C 06 16 23.17 -10 26 57.5 426