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
2009-11-30 04:51:29 C 05 27 32.33 -41 39 13.9 c 808
2009-11-30 05:01:59 C 05 27 30.95 -41 39 47.6 c 808
2009-11-30 05:11:40 C 05 27 29.52 -41 40 21.2 c 808
2009-12-23 11:28:43 C 03 39 37.05 -63 00 53.7 r E12
2009-12-23 11:41:49 C 03 39 33.97 -63 01 09.0 r E12
2009-12-23 11:54:55 C 03 39 30.84 -63 01 24.2 r E12
2009-12-23 12:08:01 C 03 39 27.73 -63 01 39.3 r E12
2010-01-03 02:14:10 C 02 42 08.32 -66 23 20.6 o 844
2010-01-03 02:21:34 C 02 42 06.73 -66 23 25.3 o 844
2010-01-03 02:37:37 C 02 42 03.23 -66 23 32.4 o 844
2010-01-03 02:49:06 C 02 42 00.80 -66 23 36.5 o 844
2010-01-08 03:02:09 C 02 17 26.00 -67 09 49.5 r I20
2010-01-08 03:13:03 C 02 17 23.84 -67 09 52.5 r I20
2010-01-08 03:24:44 C 02 17 21.50 -67 09 55.8 r I20
2010-01-14 02:23:01 C 01 51 13.32 -67 39 16.3 r I20
2010-01-14 02:35:13 C 01 51 11.20 -67 39 17.7 r I20
2010-01-14 02:47:39 C 01 51 09.07 -67 39 18.9 r I20
2010-01-15 02:03:02 C 01 47 13.50 -67 42 09.8 o 844
2010-01-15 02:36:16 C 01 47 07.80 -67 42 13.1 o 844
2010-01-15 02:49:00 C 01 47 05.70 -67 42 14.2 o 844
2010-01-15 03:00:33 C 01 47 03.82 -67 42 15.0 o 844
2010-01-15 03:14:02 C 01 47 01.49 -67 42 16.3 o 844
2010-04-21 16:43:29 S 20 41 03.338 -40 54 17.96 L C51
2010-04-21 19:53:49 S 20 40 24.54 -40 41 56.3 L C51
2010-04-21 21:29:10 S 20 40 05.08 -40 35 42.0 L C51
2010-04-21 23:04:20 S 20 39 45.59 -40 29 27.0 L C51
2010-04-22 00:39:30 S 20 39 26.10 -40 23 10.3 L C51
2010-04-22 02:14:51 S 20 39 06.52 -40 16 50.9 L C51
2010-04-22 03:50:01 S 20 38 46.973 -40 10 30.90 L C51
2010-04-22 07:00:33 S 20 38 07.735 -39 57 44.93 L C51
2010-05-01 07:15:41 C 19 49 02.97 -20 15 22.4 r I20
2010-05-01 07:22:03 C 19 49 01.36 -20 14 37.9 r I20
2010-05-01 07:28:11 C 19 48 59.80 -20 13 55.0 r I20
2010-05-01 07:34:43 C 19 48 58.15 -20 13 09.4 r I20
2010-05-01 07:42:23 C 19 48 56.20 -20 12 15.6 r I20
2010-05-13 21:39:01 C 18 27 51.79 +18 47 34.0 16.2 u 084
2010-05-13 23:59:32 C 18 27 12.13 +19 03 35.3 15.2 u 084
2010-05-14 22:53:18 C 18 20 50.09 +21 35 27.5 15.9 u 084
2010-05-14 23:49:27 C 18 20 34.25 +21 41 29.5 17.1 u 084
2010-05-15 00:00:55 C 18 20 30.98 +21 42 43.3 16.7 u 084
2010-05-15 00:02:07 C 18 20 30.72 +21 42 50.6 16.4 u 084
2010-05-15 08:15:44 C 18 18 14.26 +22 35 25.1 o 291
2010-05-15 08:21:38 C 18 18 12.60 +22 36 01.6 o 291
2010-05-15 08:27:31 C 18 18 10.90 +22 36 38.7 o 291
2010-05-16 22:50:37 C 18 07 35.08 +26 25 55.7 15.3 u 084
2010-05-16 23:16:29 C 18 07 28.51 +26 28 23.2 w J93
2010-05-16 23:18:05 C 18 07 28.04 +26 28 32.4 w J93
2010-05-16 23:19:41 C 18 07 27.59 +26 28 41.5 w J93
2010-05-16 23:29:06 C 18 07 24.34 +26 29 34.0 15.8 u 084
2010-05-20 00:23:53 C 17 47 44.43 +32 38 06.5 r J75