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
1999-06-09 09:09:13 C 06 16 23.76 -10 26 58.9 426
2000-09-30 06:52:02 C 00 41 44.03 +71 48 06.6 z 711
2000-09-30 07:02:18 C 00 41 42.56 +71 48 00.1 z 711
2000-09-30 07:16:21 C 00 41 39.21 +71 47 52.8 z 711
2002-08-02 20:38:36 C 00 20 20.96 +73 24 08.7 d 540
2002-08-02 21:25:29 C 00 20 19.84 +73 24 33.4 d 540
2002-09-20 05:34:26 C 22 13 26.52 +75 02 57.6 711
2002-09-20 05:46:19 C 22 13 25.21 +75 02 49.8 711
2002-09-20 05:58:10 C 22 13 23.98 +75 02 43.8 711
2004-05-28 08:53:55 C 22 14 49.96 +56 31 56.5 c 926
2004-05-28 08:56:38 C 22 14 50.13 +56 31 59.8 c 926
2004-05-28 08:59:23 C 22 14 50.36 +56 32 02.8 c 926
2004-06-19 00:08:52 C 22 31 57.28 +64 55 24.9 o 461
2004-06-19 00:14:12 C 22 31 57.37 +64 55 29.9 o 461
2004-06-19 00:19:32 C 22 31 57.39 +64 55 34.7 o 461
2004-07-16 06:24:25 C 22 19 02.81 +73 09 26.0 c 711
2004-07-16 06:36:25 C 22 19 02.22 +73 09 32.0 c 711
2004-08-08 21:23:30 C 21 13 30.38 +76 32 48.3 o 461
2004-08-08 21:26:41 C 21 13 29.93 +76 32 48.7 o 461
2004-08-08 21:29:51 C 21 13 29.42 +76 32 49.4 o 461
2004-08-08 21:33:02 C 21 13 28.94 +76 32 49.3 o 461
2004-08-08 21:36:12 C 21 13 28.43 +76 32 49.6 o 461
2004-08-08 21:39:22 C 21 13 27.99 +76 32 50.0 o 461
2004-08-11 02:08:17 C 21 05 25.61 +76 35 41.9 o 461
2004-08-21 21:23:42 C 20 27 26.12 +76 05 42.8 c A48
2004-08-21 21:37:58 C 20 27 24.13 +76 05 39.4 c A48
2004-08-21 21:52:13 C 20 27 22.30 +76 05 35.3 c A48
2006-05-21 09:07:56 C 21 00 56.41 +51 40 51.1 19.8 c 704
2006-05-21 09:24:21 C 21 00 56.71 +51 41 14.2 19.3 c 704
2006-05-21 09:41:45 C 21 00 56.98 +51 41 38.5 19.2 c 704
2006-05-21 09:59:32 C 21 00 57.17 +51 42 04.7 19.9 c 704
2006-06-11 22:57:51 C 20 57 00.32 +62 35 32.8 o A74
2006-06-11 23:01:00 C 20 57 00.24 +62 35 36.3 o A74
2006-06-11 23:04:07 C 20 57 00.14 +62 35 39.8 o A74
2006-06-11 23:06:44 C 20 57 00.02 +62 35 42.2 o A74
2006-06-11 23:10:55 C 20 56 59.90 +62 35 47.2 o A74
2008-03-19 11:47:27 C 19 28 32.16 -16 31 29.6 r 448
2008-03-19 11:52:54 C 19 28 32.43 -16 31 15.8 r 448
2008-03-19 11:58:18 C 19 28 32.78 -16 31 04.5 r 448
2008-05-12 00:53:45 C 19 54 21.98 +39 35 51.8 r B67
2008-05-12 01:11:04 C 19 54 21.57 +39 36 32.8 r B67
2008-05-12 01:28:13 C 19 54 21.05 +39 37 12.2 r B67
2008-06-13 06:21:50 C 18 54 49.77 +60 49 59.3 r H45
2008-06-13 06:23:22 C 18 54 49.59 +60 50 00.8 r H45
2008-06-13 06:25:14 C 18 54 49.34 +60 50 01.7 r H45
2008-06-13 06:27:57 C 18 54 49.00 +60 50 04.2 r H45
2008-06-13 06:30:17 C 18 54 48.63 +60 50 06.4 r H45
2008-06-17 21:36:12 C 18 40 11.65 +62 19 03.6 c J27
2008-06-17 23:01:24 C 18 39 59.78 +62 20 03.2 c J27
2008-06-17 23:55:55 C 18 39 52.15 +62 20 41.6 c J27