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
2014-01-03 11:13:51 C 01 19 31.22 +09 08 48.6 q D29
2014-01-03 11:42:29 C 01 19 31.79 +09 08 16.6 q D29
2014-01-04 01:43:10 C 01 19 49.56 +08 53 00.1 R G45
2014-01-04 02:01:07 C 01 19 49.90 +08 52 40.1 R G45
2014-01-04 02:19:22 C 01 19 50.25 +08 52 20.6 R G45
2014-01-04 02:37:27 C 01 19 50.65 +08 52 00.7 R G45
2014-01-04 02:55:57 C 01 19 50.99 +08 51 40.7 R G45
2014-01-04 03:14:37 C 01 19 51.36 +08 51 20.7 R G45
2014-01-05 01:34:03 C 01 20 21.12 +08 27 26.4 R G45
2014-01-05 01:50:48 C 01 20 21.46 +08 27 09.0 R G45
2014-01-05 02:10:09 C 01 20 21.87 +08 26 48.0 R G45
2014-01-05 02:27:52 C 01 20 22.24 +08 26 29.5 R G45
2014-01-05 02:28:15 C 01 20 22.26 +08 26 28.8 R G45
2014-01-05 02:46:47 C 01 20 22.64 +08 26 09.7 R G45
2014-01-05 03:05:11 C 01 20 23.01 +08 25 50.3 R G45
2014-01-05 03:24:00 C 01 20 23.43 +08 25 29.5 R G45
2014-01-09 01:21:24 C 01 22 45.96 +06 50 54.2 q 448
2014-01-09 01:30:30 C 01 22 46.20 +06 50 45.5 q 448
2014-01-09 01:39:40 C 01 22 46.55 +06 50 36.0 q 448
2014-01-11 03:19:45 C 01 24 12.22 +06 04 12.8 q 703
2014-01-11 03:30:43 C 01 24 12.65 +06 04 01.8 q 703
2014-01-11 03:41:40 C 01 24 12.87 +06 03 52.7 q 703
2014-01-11 03:52:38 C 01 24 13.23 +06 03 43.2 q 703
2014-01-12 01:48:02 C 01 24 53.46 +05 43 58.4 u H21
2014-01-12 01:53:15 C 01 24 53.62 +05 43 54.1 u H21
2014-01-12 01:58:25 C 01 24 53.77 +05 43 49.3 u H21
2014-01-12 02:03:23 C 01 24 53.93 +05 43 45.0 u H21
2014-01-14 02:03:28 C 01 26 26.45 +05 02 07.7 u H21
2014-01-14 02:09:22 C 01 26 26.62 +05 02 02.3 u H21
2014-01-14 02:14:35 C 01 26 26.80 +05 01 57.4 u H21
2014-08-03 22:20:55 C 12 22 14.94 -03 43 48.5 r Y00
2014-08-03 22:23:22 C 12 22 15.35 -03 43 46.5 r Y00
2014-08-03 22:25:46 C 12 22 15.74 -03 43 43.7 r Y00
2015-10-19 20:23:35 C 01 06 12.53 +64 38 58.3 c A24
2015-10-19 20:25:41 C 01 06 12.31 +64 38 55.1 c A24
2015-10-19 20:26:43 C 01 06 12.19 +64 38 54.0 c A24
2015-10-19 21:27:21 C 01 06 04.86 +64 38 04.2 c A24
2015-10-19 21:28:23 C 01 06 04.65 +64 38 03.3 c A24
2015-10-19 21:29:26 C 01 06 04.51 +64 38 02.3 c A24
2015-10-19 21:30:28 C 01 06 04.50 +64 38 01.8 c A24
2015-11-22 05:00:43 C 00 12 19.39 +46 41 45.3 R G45
2015-11-22 05:00:49 C 00 12 19.38 +46 41 45.3 R G45
2015-11-22 05:09:07 C 00 12 19.25 +46 41 32.2 R G45
2015-11-22 05:09:13 C 00 12 19.25 +46 41 31.3 R G45
2015-11-22 05:17:33 C 00 12 19.13 +46 41 17.6 R G45
2015-11-22 05:17:39 C 00 12 19.13 +46 41 17.7 R G45
2015-11-22 05:25:51 C 00 12 18.98 +46 41 04.2 R G45
2015-11-22 05:25:57 C 00 12 18.97 +46 41 04.0 R G45
2015-12-01 05:52:43 C 00 11 07.81 +40 48 20.5 q 703
2015-12-01 06:01:28 C 00 11 07.86 +40 48 06.3 q 703