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
2010-09-01 19:55:26 C 16 01 37.45 +39 56 58.8 u B38
2010-09-01 20:07:31 C 16 01 38.19 +39 56 53.0 u B38
2010-09-15 03:55:10 C 16 22 04.69 +37 55 44.8 r 703
2010-09-15 04:06:03 C 16 22 05.41 +37 55 39.0 r 703
2010-09-15 04:16:42 C 16 22 06.02 +37 55 35.6 r 703
2010-09-15 04:27:27 C 16 22 06.81 +37 55 30.6 r 703
2010-09-18 02:41:54 C 16 26 58.94 +37 30 11.0 19.3 c 704
2010-09-18 02:59:33 C 16 27 00.16 +37 30 05.5 18.8 c 704
2010-09-18 03:17:33 C 16 27 01.33 +37 29 59.4 19.1 c 704
2010-09-18 03:35:15 C 16 27 02.55 +37 29 52.4 19.4 c 704
2010-09-18 03:52:56 C 16 27 03.75 +37 29 45.6 19.1 c 704
2010-10-09 02:25:37 C 17 05 16.83 +34 45 01.2 r 703
2010-10-09 02:32:14 C 17 05 17.26 +34 44 57.2 r 703
2010-10-09 02:38:48 C 17 05 17.80 +34 44 56.2 r 703
2010-10-09 02:45:19 C 17 05 18.31 +34 44 53.1 r 703
2011-09-23 03:53:41 C 04 55 53.61 +43 54 49.3 c A24
2011-09-23 03:55:46 C 04 55 53.70 +43 54 48.9 c A24
2011-10-03 02:32:09 C 04 56 16.16 +42 28 18.5 c A24
2011-10-03 02:34:14 C 04 56 16.12 +42 28 17.5 c A24
2011-10-04 01:11:23 C 04 56 01.86 +42 18 11.2 c A24
2011-10-04 01:13:28 C 04 56 01.82 +42 18 10.6 c A24
2011-10-04 01:34:52 C 04 56 01.53 +42 18 01.0 c A24
2011-10-04 01:56:47 C 04 56 01.23 +42 17 51.0 c A24
2011-10-04 02:18:10 C 04 56 00.90 +42 17 42.2 c A24
2011-10-04 02:20:15 C 04 56 00.93 +42 17 41.0 c A24
2011-10-23 08:22:55 C 04 38 25.22 +36 56 04.3 r 703
2011-10-23 08:34:55 C 04 38 24.25 +36 55 53.1 r 703
2011-10-23 08:47:23 C 04 38 23.53 +36 55 39.8 r 703
2011-10-23 08:59:45 C 04 38 22.66 +36 55 27.2 r 703
2011-10-27 00:43:12 C 04 31 59.196 +35 19 09.10 u 089
2011-10-27 00:45:34 C 04 31 59.034 +35 19 06.42 u 089
2011-10-27 00:47:57 C 04 31 58.824 +35 19 03.63 u 089
2011-10-27 00:50:18 C 04 31 58.646 +35 19 00.76 u 089
2011-10-27 00:52:40 C 04 31 58.458 +35 18 57.89 u 089
2011-10-27 00:55:02 C 04 31 58.265 +35 18 55.17 u 089
2011-10-27 00:57:24 C 04 31 58.072 +35 18 52.36 u 089
2011-10-27 00:59:46 C 04 31 57.868 +35 18 49.58 u 089
2011-10-27 01:02:08 C 04 31 57.714 +35 18 46.91 u 089
2011-10-27 01:04:30 C 04 31 57.484 +35 18 43.65 u 089
2011-11-03 07:39:20 C 04 16 18.99 +31 18 43.9 17.2 c 704
2011-11-03 07:57:08 C 04 16 17.16 +31 18 16.0 17.6 c 704
2011-11-03 08:15:15 C 04 16 15.26 +31 17 46.8 17.3 c 704
2011-11-03 08:33:04 C 04 16 13.44 +31 17 18.9 17.3 c 704
2011-11-03 08:51:01 C 04 16 11.61 +31 16 50.9 17.3 c 704
2011-11-15 08:49:00 C 03 43 33.96 +21 58 05.1 r 703
2011-11-15 08:56:49 C 03 43 32.98 +21 57 47.1 r 703
2011-11-15 09:04:43 C 03 43 31.98 +21 57 28.8 r 703
2011-11-15 09:12:31 C 03 43 31.00 +21 57 10.8 r 703
2011-11-16 06:47:00 C 03 40 52.03 +21 07 24.6 r G96
2011-11-16 06:57:00 C 03 40 50.73 +21 07 01.7 r G96