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
2017-09-08 12:21:48 C 00 37 53.896 +75 05 57.79 L F51
2017-09-08 12:40:39 C 00 37 51.471 +75 05 59.02 L F51
2017-10-21 14:06:18 C 22 46 16.76 +65 46 35.8 q D29
2017-10-21 14:30:28 C 22 46 15.80 +65 46 08.5 q D29
2017-10-30 06:44:34 C 22 41 57.198 +61 38 36.24 L F51
2017-10-30 07:03:33 C 22 41 57.005 +61 38 12.31 L F51
2017-10-30 07:22:33 C 22 41 56.809 +61 37 48.44 L F51
2017-10-30 07:41:29 C 22 41 56.623 +61 37 24.69 L F51
2017-11-30 00:49:01 C 23 00 02.92 +45 15 44.0 u H21
2017-11-30 00:55:27 C 23 00 03.19 +45 15 35.9 u H21
2017-11-30 01:03:29 C 23 00 03.54 +45 15 25.1 u H21
2017-12-01 01:59:03 C 23 01 13.84 +44 43 20.0 u H21
2017-12-01 02:09:13 C 23 01 14.32 +44 43 07.2 u H21
2017-12-07 03:00:17 C 23 08 29.37 +41 42 09.0 U 703
2017-12-07 03:08:17 C 23 08 29.80 +41 41 57.6 U 703
2017-12-07 03:24:19 C 23 08 30.60 +41 41 39.0 U 703
2017-12-08 02:06:16 C 23 09 42.62 +41 14 12.1 U G96
2017-12-08 02:14:02 C 23 09 43.05 +41 14 02.7 U G96
2017-12-08 02:21:47 C 23 09 43.44 +41 13 53.3 U G96
2017-12-08 02:29:34 C 23 09 43.83 +41 13 44.0 U G96
2017-12-21 02:34:18 C 23 27 33.69 +35 26 12.1 U 703
2017-12-21 02:41:53 C 23 27 34.17 +35 26 03.9 U 703
2017-12-21 02:49:26 C 23 27 34.65 +35 25 55.4 U 703
2017-12-21 02:57:01 C 23 27 35.02 +35 25 48.0 U 703
2017-12-24 05:30:18 C 23 32 09.353 +34 11 40.07 U F51
2017-12-24 05:47:40 C 23 32 10.412 +34 11 23.13 U F51
2017-12-24 06:05:04 C 23 32 11.464 +34 11 06.09 U F51
2018-01-05 02:48:48 C 23 50 26.85 +30 00 27.6 U 703
2018-01-05 02:56:27 C 23 50 27.27 +30 00 22.2 U 703
2018-01-05 03:04:06 C 23 50 27.65 +30 00 16.6 U 703
2018-01-12 02:53:48 C 00 01 41.54 +27 55 41.3 U 703
2018-01-12 03:12:39 C 00 01 42.79 +27 55 27.6 U 703
2018-01-12 03:20:50 C 00 01 43.41 +27 55 21.1 U 703
2018-01-17 05:19:11 C 00 10 03.994 +26 34 52.11 U F51
2018-01-17 05:34:03 C 00 10 05.005 +26 34 42.72 U F51
2018-01-17 05:48:55 C 00 10 06.021 +26 34 33.35 U F51
2018-01-17 06:03:49 C 00 10 07.036 +26 34 23.91 U F51
2018-01-18 02:23:55 C 00 11 31.27 +26 21 44.7 U 703
2018-01-18 02:31:31 C 00 11 31.92 +26 21 40.7 U 703
2018-01-18 02:39:08 C 00 11 32.38 +26 21 35.0 U 703
2018-01-18 02:46:44 C 00 11 32.94 +26 21 30.6 U 703
2018-02-05 02:06:23 C 00 42 04.13 +22 39 31.8 U 703
2018-02-05 02:14:44 C 00 42 04.76 +22 39 27.3 U 703
2018-02-05 02:23:05 C 00 42 05.44 +22 39 24.4 U 703
2018-02-05 02:31:26 C 00 42 05.99 +22 39 19.7 U 703
2019-06-04 10:47:51 C 22 59 21.01 +58 25 35.8 U I41
2019-06-04 10:50:30 C 22 59 21.17 +58 25 38.3 U I41
2019-06-04 11:20:31 C 22 59 22.87 +58 26 04.9 U I41
2019-06-04 11:23:10 C 22 59 23.02 +58 26 07.3 U I41
2019-09-03 02:16:54 C 21 38 54.41 +76 50 22.6 V C95