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
2025-05-09 00:46:58 C 19 29 50.890 +29 25 26.22 Z C23
2025-05-10 12:22:52 C 19 27 20.345 +31 23 38.51 V T05
2025-05-10 12:31:52 C 19 27 19.656 +31 24 08.06 V T05
2025-05-10 12:36:26 C 19 27 19.308 +31 24 23.11 V T05
2025-05-10 12:50:48 C 19 27 18.204 +31 25 10.13 V T05
2025-05-10 22:15:25 B 19 26 36.761 +31 55 46.88 W M73
2025-05-10 22:28:18 B 19 26 35.774 +31 56 28.61 W M73
2025-05-10 22:41:09 B 19 26 34.774 +31 57 10.66 W M73
2025-05-10 22:54:02 B 19 26 33.780 +31 57 52.38 W M73
2025-05-10 23:03:41 B 19 26 33.024 +31 58 23.74 W M73
2025-05-10 23:32:35 C 19 26 31.109 +31 59 49.42 Z C23
2025-05-10 23:46:20 C 19 26 30.048 +32 00 34.92 Z C23
2025-05-12 01:08:13 B 19 24 34.087 +33 21 46.80 X K87
2025-05-12 01:12:17 B 19 24 33.761 +33 21 59.76 X K87
2025-05-12 01:16:20 B 19 24 33.432 +33 22 12.68 X K87
2025-05-12 12:23:48 C 19 23 41.093 +33 57 18.32 V T08
2025-05-12 12:28:25 C 19 23 40.709 +33 57 32.87 V T08
2025-05-12 12:36:21 C 19 23 40.056 +33 57 57.78 V T08
2025-05-12 13:13:51 C 19 23 36.924 +33 59 55.39 V T08
2025-05-12 13:16:29 C 19 23 36.713 +34 00 03.74 V T08
2025-05-12 13:52:54 C 19 23 33.674 +34 01 58.19 V T08
2025-05-12 22:34:41 C 19 22 52.303 +34 28 51.02 Z C23
2025-05-12 22:43:52 C 19 22 51.614 +34 29 20.80 Z C23
2025-05-12 23:45:49 B 19 22 46.500 +34 32 33.29 Z K35
2025-05-12 23:47:15 B 19 22 46.380 +34 32 37.93 Z K35
2025-05-12 23:47:43 B 19 22 46.334 +34 32 39.30 Z K35
2025-05-16 00:32:04 B 19 16 30.883 +38 09 28.55 V L65
2025-05-16 00:36:15 B 19 16 30.502 +38 09 40.79 V L65
2025-05-16 00:40:26 B 19 16 30.120 +38 09 52.70 V L65
2025-05-17 00:59:04 B 19 14 14.640 +39 18 31.14 V L65
2025-05-17 01:03:15 B 19 14 14.222 +39 18 42.80 V L65
2025-05-17 01:07:26 B 19 14 13.819 +39 18 54.36 V L65
2025-05-17 02:38:00 C 19 14 05.402 +39 23 10.79 V R17
2025-05-17 02:58:31 C 19 14 03.377 +39 24 07.81 V R17
2025-05-17 03:19:04 C 19 14 01.351 +39 25 05.16 V R17
2025-05-17 03:39:36 C 19 13 59.340 +39 26 02.40 V R17
2025-05-18 14:10:26 C 19 10 37.238 +40 59 47.83 V T08
2025-05-18 14:15:04 C 19 10 36.749 +41 00 00.29 V T08
2025-05-18 14:29:20 C 19 10 35.263 +41 00 38.30 V T08
2025-05-19 22:31:08 C 19 07 19.522 +42 23 48.23 Z C23
2025-05-19 23:24:23 C 19 07 13.877 +42 26 04.99 Z C23
2025-05-20 00:03:29 C 19 07 09.737 +42 27 44.78 Z C23
2025-05-20 00:52:04 B 19 07 04.488 +42 29 48.52 V L65
2025-05-20 00:56:15 B 19 07 03.979 +42 29 58.85 V L65
2025-05-20 01:00:26 B 19 07 03.590 +42 30 10.04 V L65
2025-05-20 02:37:41 C 19 06 53.510 +42 34 21.18 V R17
2025-05-20 02:58:12 C 19 06 51.264 +42 35 12.95 V R17
2025-05-20 03:18:43 C 19 06 49.039 +42 36 05.18 V R17
2025-05-20 03:39:16 C 19 06 46.802 +42 36 57.28 V R17
2025-05-20 14:08:15 C 19 05 39.802 +43 03 17.86 V T05