2018 ER4

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.4641791000
Semi-major axis (a)1.9030483000 AU
Inclination (i)2.32236000°
Long. of Asc. Node (Ω)359.90165000°
Arg. of Perihelion (ω)220.68417000°
Mean Anomaly (M)314.57242000°
Mean Motion (n)0.3754303400°/day
Perihelion dist (q)1.01969310 AU
Aphelion dist (Q)2.78640350 AU
Orbital Period2.62527450 yr
Physical Parameters
H (abs. magnitude)22.20
G (slope)0.15
Orbit Solution
SourceMPC
Solution Date
RMS Residual0.350″
Uncertainty4
Orbit TypeAmor
MOID0.027864 AU
Observations Used56
Oppositions1
Arc Total
First Observation Used
Last Observation Used2018-06-20
Observations (57)
Date Type RA Dec Mag Band Observatory
2018-03-14 04:27:34 C 08 35 38.58 +21 42 13.0 U G96
2018-03-14 04:47:59 C 08 35 37.17 +21 42 10.5 U G96
2018-03-14 04:55:24 C 08 35 36.70 +21 42 09.0 U G96
2018-03-14 05:54:04 C 08 35 32.84 +21 42 00.3 U I52
2018-03-14 05:56:26 C 08 35 32.67 +21 42 00.1 U I52
2018-03-14 05:58:50 C 08 35 32.49 +21 41 59.5 U I52
2018-03-14 06:01:12 C 08 35 32.33 +21 41 59.6 U I52
2018-03-14 20:53:26 C 08 34 42.03 +21 39 39.8 o K88
2018-03-14 21:05:04 C 08 34 41.35 +21 39 37.4 o K88
2018-03-14 21:16:42 C 08 34 40.59 +21 39 35.9 o K88
2018-03-15 04:42:06 C 08 34 15.65 +21 38 30.0 u H21
2018-03-15 04:52:47 C 08 34 14.98 +21 38 28.1 u H21
2018-03-15 05:04:22 C 08 34 14.26 +21 38 25.9 u H21
2018-03-17 08:42:36 C 08 31 30.67 +21 29 03.9 U I52
2018-03-17 08:46:44 C 08 31 30.41 +21 29 03.3 U I52
2018-03-17 08:50:16 C 08 31 30.23 +21 29 01.9 U I52
2018-03-17 08:53:49 C 08 31 30.09 +21 29 00.9 U I52
2018-03-20 03:10:37 C 08 28 29.09 +21 13 57.9 o 711
2018-03-20 03:13:07 C 08 28 29.11 +21 13 53.7 U I52
2018-03-20 03:16:54 C 08 28 28.77 +21 13 56.1 o 711
2018-03-20 03:20:38 C 08 28 28.79 +21 13 53.0 U I52
2018-03-20 03:22:41 C 08 28 28.46 +21 13 54.3 o 711
2018-03-20 03:37:58 C 08 28 27.92 +21 13 49.4 U I52
2018-03-22 03:58:02 C 08 26 33.46 +21 00 26.1 U I52
2018-03-22 04:06:41 C 08 26 33.05 +21 00 23.5 U I52
2018-03-22 04:14:13 C 08 26 32.71 +21 00 20.9 U I52
2018-03-22 04:20:00 C 08 26 32.47 +21 00 19.4 U I52
2018-04-05 04:00:52 C 08 21 08.85 +18 32 36.8 U I52
2018-04-05 04:06:10 C 08 21 08.83 +18 32 33.6 U I52
2018-04-05 04:19:37 C 08 21 08.78 +18 32 26.2 U I52
2018-04-09 03:37:01 C 08 22 05.24 +17 31 18.0 U I52
2018-04-09 03:42:43 C 08 22 05.28 +17 31 14.0 U I52
2018-04-09 03:46:18 C 08 22 05.28 +17 31 11.4 U I52
2018-04-09 03:51:53 C 08 22 05.32 +17 31 07.5 U I52
2018-04-11 02:59:21 C 08 22 57.63 +16 57 11.6 U G96
2018-04-11 03:07:25 C 08 22 57.74 +16 57 04.5 U G96
2018-04-11 03:23:34 C 08 22 57.93 +16 56 52.2 U G96
2018-04-15 03:41:54 C 08 25 34.07 +15 38 42.3 o 691
2018-04-15 03:50:49 C 08 25 34.26 +15 38 35.0 o 691
2018-04-15 03:59:45 C 08 25 34.43 +15 38 26.5 o 691
2018-05-08 02:48:39 C 09 06 32.21 +01 28 25.5 o 711
2018-05-08 02:53:34 C 09 06 32.76 +01 28 12.6 o 711
2018-05-08 02:58:28 C 09 06 33.34 +01 27 59.3 o 711
2018-05-08 03:32:49 C 09 06 37.82 +01 26 25.7 U I52
2018-05-08 03:33:54 C 09 06 37.93 +01 26 22.8 U I52
2018-05-08 03:35:00 C 09 06 38.06 +01 26 20.1 U I52
2018-05-08 03:38:51 C 09 06 38.51 +01 26 09.7 U I52
2018-05-21 03:47:20 C 10 14 41.13 -19 28 03.8 U I52
2018-05-21 03:47:36 C 10 14 41.19 -19 28 05.4 U I52
2018-05-21 03:47:52 C 10 14 41.29 -19 28 07.4 U I52