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
2025-06-21 10:43:57 C 17 19 12.770 +59 13 04.48 V T05
2025-06-21 10:48:34 C 17 19 12.120 +59 13 06.06 V T05
2025-06-21 10:56:27 C 17 19 11.018 +59 13 08.08 V T05
2025-06-21 11:14:59 C 17 19 08.407 +59 13 12.65 V T05
2025-06-21 13:06:30 C 17 18 52.798 +59 13 39.94 V T05
2025-06-22 08:32:41 C 17 16 14.891 +59 18 22.21 V 703
2025-06-22 08:35:47 C 17 16 14.531 +59 18 22.14 V 703
2025-06-22 08:42:00 C 17 16 13.580 +59 18 24.37 V 703
2025-06-22 09:37:25 C 17 16 06.682 +59 18 38.68 X F51
2025-06-22 09:59:26 C 17 16 03.633 +59 18 43.56 X F51
2025-06-22 10:21:27 C 17 16 00.581 +59 18 48.35 X F51
2025-06-23 00:20:58 C 17 14 08.678 +59 21 42.41 V R17
2025-06-23 00:40:50 C 17 14 05.954 +59 21 46.12 V R17
2025-06-23 01:00:43 C 17 14 03.242 +59 21 49.90 V R17
2025-06-23 01:20:36 C 17 14 00.521 +59 21 53.64 V R17
2025-06-23 11:16:40 C 17 12 41.681 +59 23 44.38 V T08
2025-06-23 11:27:03 C 17 12 40.250 +59 23 45.96 V T08
2025-06-23 13:48:27 C 17 12 21.360 +59 24 07.45 V T08
2025-06-24 10:52:58 C 17 09 37.673 +59 27 25.49 V T08
2025-06-24 11:11:55 C 17 09 35.165 +59 27 27.83 V T08
2025-06-24 11:24:13 C 17 09 33.586 +59 27 29.52 V T08
2025-06-24 11:34:32 C 17 09 32.225 +59 27 29.66 V T08
2025-06-24 21:14:29 B 17 08 18.223 +59 28 44.00 W M73
2025-06-24 21:20:39 B 17 08 17.357 +59 28 44.36 W M73
2025-06-24 21:29:38 B 17 08 16.171 +59 28 46.09 W M73
2025-06-26 07:31:24 C 17 04 01.459 +59 31 50.81 V G96
2025-06-26 07:38:58 C 17 04 00.520 +59 31 51.24 V G96
2025-06-26 07:46:32 C 17 03 59.569 +59 31 51.67 V G96
2025-06-26 07:54:07 C 17 03 58.612 +59 31 52.07 V G96
2025-06-28 17:42:10 B 16 57 08.407 +59 33 05.69 W M73
2025-06-28 17:47:34 B 16 57 07.781 +59 33 05.69 W M73
2025-06-28 17:53:56 B 16 57 07.039 +59 33 05.40 W M73
2025-06-30 20:03:40 B 16 51 33.785 +59 30 23.29 W M73
2025-06-30 20:09:53 B 16 51 33.158 +59 30 23.00 W M73
2025-07-01 00:23:19 C 16 51 06.281 +59 30 00.18 V R17
2025-07-01 00:43:39 C 16 51 04.039 +59 29 58.06 V R17
2025-07-01 01:03:58 C 16 51 01.838 +59 29 56.11 V R17
2025-07-01 01:24:16 C 16 50 59.604 +59 29 53.95 V R17
2025-07-02 20:20:40 B 16 46 35.102 +59 24 51.16 W M73
2025-07-02 20:31:05 B 16 46 34.075 +59 24 49.32 W M73
2025-07-02 20:40:54 B 16 46 33.050 +59 24 47.95 W M73
2025-07-03 03:50:45 B 16 45 50.863 +59 23 43.01 W X04
2025-07-03 04:10:10 B 16 45 48.979 +59 23 39.98 W X04
2025-07-03 04:22:31 B 16 45 47.753 +59 23 36.10 W X04
2025-07-03 09:56:51 C 16 45 14.926 +59 22 49.55 V T05
2025-07-03 10:02:13 C 16 45 14.414 +59 22 48.86 V T05
2025-07-03 10:12:06 C 16 45 13.490 +59 22 46.96 V T05
2025-07-03 10:26:39 C 16 45 11.983 +59 22 44.22 V T05
2025-07-03 12:01:35 C 16 45 02.508 +59 22 26.94 V T05
2025-07-07 23:00:57 C 16 35 34.382 +58 59 47.40 V R17