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
2025-04-18 00:29:32 C 19 49 50.74 -01 42 17.5 X D04
2025-04-18 00:39:18 C 19 49 50.58 -01 41 40.0 X D04
2025-04-18 00:48:53 C 19 49 50.38 -01 41 05.1 X D04
2025-04-25 01:44:55 C 19 45 59.772 +08 56 27.64 V M52
2025-04-25 02:23:02 C 19 45 58.697 +08 58 53.40 V M52
2025-04-26 01:14:17 C 19 45 15.624 +10 26 06.83 Z C23
2025-04-26 01:42:10 C 19 45 14.623 +10 27 53.39 Z C23
2025-04-26 09:25:15 C 19 44 59.146 +10 57 38.92 V W68
2025-04-26 09:27:50 C 19 44 59.066 +10 57 49.03 V W68
2025-04-26 09:55:00 C 19 44 58.056 +10 59 32.57 V W68
2025-04-27 13:52:14 C 19 44 00.175 +12 45 55.76 V T05
2025-04-27 14:05:23 C 19 43 59.657 +12 46 45.80 V T05
2025-04-27 14:23:31 C 19 43 58.937 +12 47 55.00 V T05
2025-04-30 00:48:33 C 19 41 41.688 +16 29 06.32 Z C23
2025-04-30 01:17:22 C 19 41 40.394 +16 30 55.04 Z C23
2025-05-02 00:36:42 C 19 39 32.66 +19 27 48.1 V M32
2025-05-02 00:38:33 C 19 39 32.49 +19 27 55.5 V M32
2025-05-02 00:40:26 C 19 39 32.45 +19 28 02.3 V M32
2025-05-02 00:42:45 C 19 39 32.30 +19 28 11.2 V M32
2025-05-02 00:44:36 C 19 39 32.24 +19 28 17.6 V M32
2025-05-02 00:47:24 C 19 39 32.15 +19 28 28.8 V M32
2025-05-02 00:49:14 C 19 39 32.00 +19 28 35.1 V M32
2025-05-02 00:50:11 C 19 39 31.94 +19 28 38.8 V M32
2025-05-02 13:20:25 C 19 38 55.692 +20 15 00.00 V T05
2025-05-02 13:23:03 C 19 38 55.574 +20 15 09.54 V T05
2025-05-02 13:27:03 C 19 38 55.361 +20 15 24.19 V T05
2025-05-02 13:41:40 C 19 38 54.598 +20 16 18.37 V T05
2025-05-03 13:07:21 C 19 37 43.718 +21 42 18.00 V T05
2025-05-03 13:11:17 C 19 37 43.502 +21 42 32.33 V T05
2025-05-03 13:15:51 C 19 37 43.250 +21 42 49.10 V T05
2025-05-03 13:31:20 C 19 37 42.394 +21 43 45.84 V T05
2025-05-04 03:45:37 C 19 36 57.396 +22 35 32.28 V R17
2025-05-04 04:06:07 C 19 36 56.239 +22 36 46.94 V R17
2025-05-04 04:26:47 C 19 36 55.073 +22 38 01.54 V R17
2025-05-04 04:47:29 C 19 36 53.882 +22 39 17.46 V R17
2025-05-04 12:36:50 C 19 36 28.766 +23 07 35.94 V T08
2025-05-04 12:39:34 C 19 36 28.608 +23 07 45.62 V T08
2025-05-04 12:43:39 C 19 36 28.378 +23 08 00.42 V T08
2025-05-04 13:22:24 C 19 36 26.131 +23 10 20.53 V T08
2025-05-04 23:43:21 C 19 35 51.914 +23 47 26.70 Z C23
2025-05-05 00:42:14 C 19 35 48.617 +23 50 58.02 Z C23
2025-05-05 23:41:09 B 19 34 29.16 +25 12 53.5 X L76
2025-05-05 23:46:24 B 19 34 28.85 +25 13 12.2 X L76
2025-05-05 23:51:40 B 19 34 28.53 +25 13 30.9 X L76
2025-05-05 23:56:54 B 19 34 28.20 +25 13 49.5 X L76
2025-05-06 00:02:09 B 19 34 27.89 +25 14 07.9 X L76
2025-05-06 00:07:24 B 19 34 27.57 +25 14 26.4 X L76
2025-05-08 23:01:13 C 19 29 58.198 +29 19 28.20 Z C23
2025-05-08 23:41:33 C 19 29 55.392 +29 21 43.96 Z C23
2025-05-08 23:43:52 C 19 29 55.258 +29 21 52.13 Z C23