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
2019-09-03 02:29:38 C 21 38 52.45 +76 50 18.3 V C95
2019-09-03 02:42:21 C 21 38 50.55 +76 50 14.7 V C95
2019-09-03 02:55:05 C 21 38 48.97 +76 50 10.8 V C95
2019-10-15 03:19:03 C 20 49 01.05 +65 14 57.4 u H21
2019-10-15 03:22:09 C 20 49 01.12 +65 14 54.7 u H21
2019-10-15 03:25:15 C 20 49 01.19 +65 14 51.4 u H21
2019-10-15 03:28:21 C 20 49 01.32 +65 14 48.5 u H21
2019-10-15 03:31:27 C 20 49 01.43 +65 14 45.0 u H21
2019-10-15 03:34:33 C 20 49 01.50 +65 14 42.2 u H21
2019-11-06 02:16:59 C 21 13 49.51 +55 59 53.4 U I41
2019-11-06 02:18:22 C 21 13 49.61 +55 59 52.0 U I41
2019-11-06 03:15:03 C 21 13 53.03 +55 58 50.1 U I41
2019-11-06 03:16:28 C 21 13 53.09 +55 58 48.6 U I41
2019-11-07 08:15:34 C 21 15 41.43 +55 27 16.5 V T08
2019-11-07 08:20:13 C 21 15 41.61 +55 27 11.1 V T08
2019-11-07 08:28:15 C 21 15 42.27 +55 27 02.3 V T08
2019-11-07 08:43:36 C 21 15 43.22 +55 26 46.6 V T08
2019-12-16 01:30:42 C 22 24 24.53 +40 01 00.9 V G96
2019-12-16 01:38:16 C 22 24 25.12 +40 00 54.2 V G96
2019-12-16 01:45:52 C 22 24 25.74 +40 00 47.9 V G96
2019-12-16 01:53:24 C 22 24 26.34 +40 00 41.1 V G96
2021-02-04 13:34:18 C 18 34 31.39 -05 37 46.9 U I41
2021-02-04 13:37:43 C 18 34 31.72 -05 37 42.8 U I41
2021-02-04 13:41:09 C 18 34 32.07 -05 37 38.3 U I41
2021-02-04 13:44:36 C 18 34 32.40 -05 37 34.1 U I41
2021-02-08 13:30:05 C 18 43 46.36 -03 37 31.7 U I41
2021-02-08 13:33:35 C 18 43 46.71 -03 37 27.3 U I41
2021-02-08 13:37:04 C 18 43 47.03 -03 37 22.9 U I41
2021-02-08 13:40:34 C 18 43 47.35 -03 37 18.6 U I41
2021-02-19 12:58:39 C 19 08 12.99 +02 05 50.9 U I41
2021-02-19 13:07:15 C 19 08 13.76 +02 06 02.4 U I41
2021-02-19 13:11:34 C 19 08 14.15 +02 06 08.1 U I41
2021-02-19 13:15:52 C 19 08 14.53 +02 06 13.8 U I41
2021-06-05 13:48:00 C 21 48 02.42 +59 59 18.0 V T08
2021-06-05 13:52:39 C 21 48 02.38 +59 59 23.2 V T08
2021-06-05 14:04:16 C 21 48 02.61 +59 59 35.4 V T08
2021-06-05 14:24:12 C 21 48 02.89 +59 59 57.7 V T08
2021-10-14 01:54:13 C 19 23 13.25 +58 37 33.3 V G96
2021-10-14 02:02:34 C 19 23 13.78 +58 37 26.5 V G96
2021-10-14 02:10:57 C 19 23 14.31 +58 37 19.5 V G96
2021-10-14 02:19:21 C 19 23 14.86 +58 37 12.3 V G96
2021-10-17 03:37:44 C 19 28 14.76 +57 36 09.4 V 703
2021-10-17 03:45:08 C 19 28 15.46 +57 36 03.9 V 703
2021-10-17 03:59:57 C 19 28 16.47 +57 35 54.1 V 703
2021-10-23 04:34:45 C 19 38 49.94 +55 35 06.3 V G96
2021-10-23 04:41:36 C 19 38 50.47 +55 35 00.3 V G96
2021-10-23 04:48:26 C 19 38 50.99 +55 34 54.5 V G96
2021-10-23 04:55:16 C 19 38 51.52 +55 34 48.8 V G96
2022-01-13 02:50:22 C 22 36 02.88 +34 23 21.6 V G96
2022-01-13 02:57:21 C 22 36 03.51 +34 23 19.0 V G96