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
2008-09-07 04:15:29 C 17 00 31.82 +52 53 34.1 r 703
2008-09-07 04:25:10 C 17 00 32.11 +52 53 28.1 r 703
2008-09-07 04:34:43 C 17 00 32.58 +52 53 22.4 r 703
2008-09-07 04:44:21 C 17 00 32.97 +52 53 15.2 r 703
2008-09-27 21:38:29 C 17 29 09.84 +48 06 22.2 v B15
2008-09-27 21:44:55 C 17 29 10.28 +48 06 18.5 v B15
2008-09-27 21:48:08 C 17 29 10.50 +48 06 16.5 v B15
2008-09-27 21:56:43 C 17 29 11.07 +48 06 11.7 v B15
2009-09-15 09:41:23 C 05 44 54.50 +28 56 06.1 18.9 c 704
2009-09-15 10:15:05 C 05 44 56.26 +28 55 41.0 20.1 c 704
2009-09-15 10:31:49 C 05 44 57.05 +28 55 29.5 19.6 c 704
2009-10-25 04:03:03 C 06 15 00.36 +07 08 36.1 w 160
2009-10-25 04:04:48 C 06 15 00.39 +07 08 32.0 w 160
2009-10-26 08:20:15 C 06 15 01.94 +06 01 03.8 17.1 c 704
2009-10-26 08:39:29 C 06 15 01.90 +06 00 17.6 17.3 c 704
2009-10-26 08:58:43 C 06 15 01.84 +05 59 30.8 17.5 c 704
2009-10-26 09:17:59 C 06 15 01.78 +05 58 43.5 17.5 c 704
2009-10-26 09:37:20 C 06 15 01.75 +05 57 56.8 17.7 c 704
2009-10-28 23:23:22 C 06 14 48.26 +03 21 45.2 18.5 o C20
2009-10-28 23:29:44 C 06 14 48.21 +03 21 28.9 18.3 o C20
2009-10-31 02:40:22 C 06 14 19.86 +01 02 58.4 17.3 r 084
2009-10-31 02:43:38 C 06 14 19.80 +01 02 49.3 18.9 r 084
2009-11-05 18:04:24 C 06 11 43.14 -05 43 58.4 m 355
2009-11-05 18:06:00 C 06 11 43.10 -05 44 03.7 m 355
2009-11-05 18:07:37 C 06 11 43.00 -05 44 09.4 m 355
2009-11-05 18:09:13 C 06 11 42.98 -05 44 14.2 m 355
2009-11-05 23:25:48 C 06 11 34.40 -06 01 18.1 17.3 o C20
2009-11-05 23:30:01 C 06 11 34.27 -06 01 31.9 17.3 o C20
2009-11-10 11:27:48 C 06 07 45.94 -12 08 29.6 r 703
2009-11-10 11:38:23 C 06 07 45.51 -12 09 08.0 r 703
2009-11-10 11:48:53 C 06 07 45.01 -12 09 45.1 r 703
2009-11-10 11:59:15 C 06 07 44.54 -12 10 22.0 r 703
2009-11-12 07:19:50 C 06 05 45.30 -14 46 36.2 r 850
2009-11-12 07:32:55 C 06 05 44.63 -14 47 24.2 r 850
2009-11-12 07:59:03 C 06 05 43.21 -14 48 59.5 r 850
2009-11-12 08:12:09 C 06 05 42.55 -14 49 47.8 r 850
2009-11-18 09:10:58 C 05 56 47.36 -23 57 51.1 r 448
2009-11-18 09:13:01 C 05 56 47.20 -23 57 59.0 r 448
2009-11-18 09:16:43 C 05 56 46.91 -23 58 13.3 r 448
2009-11-18 09:19:48 C 05 56 46.66 -23 58 25.3 r 448
2009-11-18 09:22:53 C 05 56 46.43 -23 58 37.5 r 448
2009-11-19 01:19:08 C 05 55 33.67 -25 00 14.2 18.1 o C20
2009-11-19 01:21:15 C 05 55 33.49 -25 00 22.1 17.9 o C20
2009-11-19 15:48:09 C 05 54 25.74 -25 56 04.3 r E12
2009-11-19 16:05:39 C 05 54 24.26 -25 57 12.1 r E12
2009-11-19 16:22:55 C 05 54 22.82 -25 58 19.0 r E12
2009-11-19 16:40:06 C 05 54 21.38 -25 59 25.6 r E12
2009-11-27 04:50:59 C 05 36 36.88 -37 23 43.6 c 808
2009-11-27 05:00:49 C 05 36 35.78 -37 24 17.3 c 808
2009-11-27 05:10:30 C 05 36 34.55 -37 24 52.3 c 808