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
2025-06-07 10:36:27 C 18 08 50.217 +55 37 55.11 X F51
2025-06-07 10:40:34 C 18 08 49.582 +55 37 59.57 X F52
2025-06-07 10:47:48 C 18 08 48.451 +55 38 07.41 X F51
2025-06-07 11:10:13 C 18 08 44.966 +55 38 31.60 V T08
2025-06-08 10:31:17 C 18 05 13.117 +56 02 42.50 V 703
2025-06-08 10:34:18 C 18 05 12.606 +56 02 45.82 V 703
2025-06-08 10:37:19 C 18 05 12.145 +56 02 48.52 V 703
2025-06-08 10:40:20 C 18 05 11.731 +56 02 51.47 V 703
2025-06-08 12:34:08 C 18 04 54.727 +56 04 47.63 X F51
2025-06-08 12:44:31 C 18 04 53.108 +56 04 57.94 X F51
2025-06-08 12:54:55 C 18 04 51.493 +56 05 08.21 X F51
2025-06-09 08:49:01 C 18 01 51.096 +56 24 25.09 V 703
2025-06-09 08:53:05 C 18 01 50.484 +56 24 27.90 V 703
2025-06-09 08:57:10 C 18 01 49.804 +56 24 31.46 V 703
2025-06-09 13:44:43 C 18 01 05.789 +56 29 01.05 X F52
2025-06-09 13:53:53 C 18 01 04.365 +56 29 09.40 X F52
2025-06-09 14:12:19 C 18 01 01.508 +56 29 26.17 X F52
2025-06-10 13:17:20 C 17 57 31.720 +56 50 06.79 X F51
2025-06-10 13:28:39 C 17 57 29.963 +56 50 16.38 X F51
2025-06-10 13:39:59 C 17 57 28.199 +56 50 25.93 X F51
2025-06-10 13:51:17 C 17 57 26.452 +56 50 35.54 X F51
2025-06-10 21:58:25 C 17 56 13.625 +56 57 26.60 Z C23
2025-06-10 22:36:33 C 17 56 07.747 +56 57 59.65 Z C23
2025-06-11 21:27:10 C 17 52 40.284 +57 16 27.08 Z C23
2025-06-11 22:12:20 C 17 52 33.413 +57 17 02.94 Z C23
2025-06-11 23:09:29 C 17 52 24.487 +57 17 47.29 Z C23
2025-06-13 08:07:55 C 17 47 25.566 +57 41 59.17 V G96
2025-06-13 08:16:03 C 17 47 24.306 +57 42 04.72 V G96
2025-06-13 08:24:12 C 17 47 23.075 +57 42 10.40 V G96
2025-06-13 08:32:21 C 17 47 21.775 +57 42 16.02 V G96
2025-06-16 09:23:30 C 17 36 29.984 +58 26 05.17 V 703
2025-06-16 09:29:32 C 17 36 29.142 +58 26 08.56 V 703
2025-06-16 09:32:33 C 17 36 28.616 +58 26 10.75 V 703
2025-06-17 00:52:23 C 17 34 14.225 +58 33 51.37 V R17
2025-06-17 01:06:02 C 17 34 11.88 +58 33 54.7 V D48
2025-06-17 01:12:04 C 17 34 11.285 +58 34 00.70 V R17
2025-06-17 01:17:47 C 17 34 10.11 +58 34 00.4 V D48
2025-06-17 01:29:33 C 17 34 08.37 +58 34 05.7 V D48
2025-06-17 01:31:43 C 17 34 08.299 +58 34 10.31 V R17
2025-06-17 01:51:24 C 17 34 05.352 +58 34 19.63 V R17
2025-06-18 23:03:09 B 17 27 33.87 +58 53 45.7 V 130
2025-06-18 23:11:52 B 17 27 32.59 +58 53 49.0 V 130
2025-06-18 23:20:55 B 17 27 31.28 +58 53 52.6 V 130
2025-06-20 08:39:08 C 17 22 48.968 +59 05 30.08 V 703
2025-06-20 08:42:29 C 17 22 48.472 +59 05 30.73 V 703
2025-06-20 08:45:50 C 17 22 47.903 +59 05 32.03 V 703
2025-06-20 08:49:11 C 17 22 47.528 +59 05 33.65 V 703
2025-06-21 02:56:04 C 17 20 17.59 +59 10 55.2 V W46
2025-06-21 03:12:56 C 17 20 15.29 +59 11 00.2 V W46
2025-06-21 03:18:42 C 17 20 14.39 +59 11 02.0 V W46