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
2015-12-01 06:10:14 C 00 11 07.89 +40 47 52.3 q 703
2015-12-01 06:19:00 C 00 11 07.86 +40 47 38.6 q 703
2015-12-04 03:52:03 C 00 11 36.90 +38 57 11.5 R G45
2015-12-04 03:52:08 C 00 11 36.90 +38 57 11.6 R G45
2015-12-04 04:01:10 C 00 11 36.99 +38 56 57.1 R G45
2015-12-04 04:01:16 C 00 11 36.97 +38 56 57.2 R G45
2015-12-04 04:10:19 C 00 11 37.05 +38 56 42.5 R G45
2015-12-04 04:10:25 C 00 11 37.06 +38 56 42.5 R G45
2015-12-04 04:19:56 C 00 11 37.13 +38 56 27.5 R G45
2015-12-04 04:20:02 C 00 11 37.11 +38 56 27.5 R G45
2015-12-07 02:02:42 C 00 12 28.05 +37 08 13.1 q 703
2015-12-07 02:05:34 C 00 12 28.22 +37 08 08.8 q 703
2015-12-07 02:08:28 C 00 12 28.21 +37 08 05.1 q 703
2015-12-07 02:11:22 C 00 12 28.23 +37 08 01.1 q 703
2015-12-08 06:26:15 C 00 12 54.44 +36 24 59.6 L T05
2015-12-08 06:46:52 C 00 12 54.76 +36 24 28.5 L T05
2015-12-08 07:07:32 C 00 12 55.14 +36 23 56.8 L T05
2015-12-08 07:28:17 C 00 12 55.41 +36 23 24.4 L T05
2015-12-09 05:43:11 C 00 13 18.43 +35 49 53.2 q 703
2015-12-09 05:48:59 C 00 13 18.56 +35 49 43.9 q 703
2015-12-09 05:54:48 C 00 13 18.61 +35 49 35.2 q 703
2015-12-09 06:00:35 C 00 13 18.71 +35 49 24.8 q 703
2015-12-18 03:56:33 C 00 18 31.68 +30 45 58.9 q 703
2015-12-18 04:05:19 C 00 18 31.89 +30 45 46.4 q 703
2015-12-18 04:14:03 C 00 18 32.17 +30 45 34.8 q 703
2015-12-18 04:22:48 C 00 18 32.45 +30 45 23.4 q 703
2015-12-20 00:51:06 C 00 19 55.97 +29 46 59.3 u H21
2015-12-20 00:54:12 C 00 19 56.05 +29 46 55.2 u H21
2015-12-20 00:57:19 C 00 19 56.15 +29 46 51.3 u H21
2015-12-20 01:00:25 C 00 19 56.26 +29 46 47.4 u H21
2015-12-20 01:03:31 C 00 19 56.35 +29 46 43.4 u H21
2015-12-20 01:06:38 C 00 19 56.44 +29 46 39.3 u H21
2015-12-20 01:09:44 C 00 19 56.54 +29 46 35.2 u H21
2015-12-20 01:13:21 C 00 19 56.65 +29 46 30.6 u H21
2016-01-03 02:31:26 C 00 33 07.98 +23 19 31.3 q 703
2016-01-03 02:39:25 C 00 33 08.31 +23 19 24.4 q 703
2016-01-03 02:47:23 C 00 33 08.79 +23 19 15.7 q 703
2016-01-03 02:55:20 C 00 33 09.06 +23 19 07.6 q 703
2016-01-14 02:18:55 C 00 46 01.55 +19 22 39.3 q 703
2016-01-14 02:40:39 C 00 46 02.69 +19 22 22.7 q 703
2016-02-04 02:03:31 C 01 14 59.65 +13 59 32.0 q 703
2016-02-04 02:15:03 C 01 15 00.36 +13 59 25.7 q 703
2016-02-04 02:20:49 C 01 15 00.82 +13 59 23.6 q 703
2016-02-09 02:46:40 C 01 22 36.36 +13 01 21.5 q 703
2016-02-09 02:55:22 C 01 22 36.83 +13 01 17.8 q 703
2016-02-09 03:12:45 C 01 22 38.01 +13 01 09.3 q 703
2016-02-16 02:14:53 C 01 33 31.91 +11 49 52.2 q 703
2016-02-16 02:29:22 C 01 33 32.89 +11 49 46.7 q 703
2016-02-16 02:36:36 C 01 33 33.34 +11 49 43.6 q 703
2017-09-08 12:02:57 C 00 37 56.320 +75 05 56.56 L F51