2008 ER

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.2570280114 ± 7.17e-08
Semi-major axis (a)1.2155242837 AU ± 3.35e-09
Inclination (i)9.40893577° ± 1.87e-05
Long. of Asc. Node (Ω)144.57690445° ± 4.19e-05
Arg. of Perihelion (ω)167.18912969° ± 4.38e-05
Mean Anomaly (M)316.48463608° ± 3.27e-05
Mean Motion (n)0.7354731403°/day ± 3.04e-09
Perihelion dist (q)0.90310049 AU ± 8.72e-08
Aphelion dist (Q)1.52794807 AU ± 8.73e-08
Orbital Period1.34012546 yr ± 5.54e-09
Physical Parameters
H (abs. magnitude)21.42
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-01
RMS Residual0.356″
Uncertainty0
Orbit TypeApollo
MOID0.093209 AU
Observations Used59
Oppositions4
Arc Total2008-2024
First Observation Used2008-03-02
Last Observation Used2024-02-14
Observations (61)
Date Type RA Dec Mag Band Observatory
2008-03-02 10:36:47 C 12 02 27.96 +11 45 08.1 r G96
2008-03-02 10:46:23 C 12 02 27.42 +11 45 20.4 r G96
2008-03-02 10:56:09 C 12 02 26.84 +11 45 32.7 r G96
2008-03-02 11:05:54 C 12 02 26.23 +11 45 45.3 r G96
2008-03-02 11:25:42 C 12 02 25.13 +11 46 09.7 r G96
2008-03-02 11:35:25 C 12 02 24.57 +11 46 21.7 r G96
2008-03-02 11:54:34 C 12 02 23.49 +11 46 45.5 r G96
2008-03-03 08:31:05 C 12 01 16.35 +12 12 51.8 r G96
2008-03-03 08:39:10 C 12 01 15.88 +12 13 02.0 r G96
2008-03-03 08:47:16 C 12 01 15.34 +12 13 12.6 r G96
2008-03-05 09:48:03 C 11 58 22.90 +13 16 23.1 r G96
2008-03-05 09:57:04 C 11 58 22.26 +13 16 35.0 r G96
2008-03-05 10:06:10 C 11 58 21.72 +13 16 46.5 r G96
2008-03-05 10:15:15 C 11 58 21.07 +13 16 58.4 r G96
2008-03-06 05:27:52 C 11 57 10.71 +13 42 04.8 o H55
2008-03-06 05:59:27 C 11 57 08.55 +13 42 46.7 o H55
2008-03-28 09:20:19 C 11 16 17.04 +24 41 45.2 o 291
2008-03-28 09:30:23 C 11 16 16.22 +24 41 55.4 o 291
2008-03-28 09:36:13 C 11 16 15.75 +24 42 01.2 o 291
2008-04-23 03:05:23 C 10 45 14.35 +30 15 52.3 22.2 o H55
2008-04-23 03:20:25 C 10 45 14.02 +30 15 53.5 22.2 o H55
2008-04-23 03:33:11 C 10 45 13.68 +30 15 54.6 22.1 o H55
2008-08-13 06:27:32 C 13 32 43.779 +01 03 57.75 o 568
2008-08-13 06:31:51 C 13 32 44.104 +01 03 50.82 o 568
2008-10-01 08:35:14 C 16 25 06.73 -71 50 15.3 o 474
2008-10-01 08:39:29 C 16 25 09.74 -71 50 35.9 o 474
2008-10-01 08:43:48 C 16 25 13.00 -71 50 57.3 o 474
2008-10-01 08:48:02 C 16 25 15.82 -71 51 15.9 o 474
2012-02-13 07:58:45 C 11 45 18.12 +06 24 14.4 r H21
2012-02-13 08:29:25 C 11 45 17.09 +06 24 42.0 r H21
2012-02-17 08:53:59 C 11 41 52.64 +07 55 28.4 r H21
2012-02-17 09:07:56 C 11 41 52.01 +07 55 42.2 r H21
2012-02-17 09:22:29 C 11 41 51.39 +07 55 56.8 r H21
2012-03-01 06:50:37 C 11 24 23.76 +13 46 35.4 r G96
2012-03-01 07:02:32 C 11 24 22.82 +13 46 49.2 r G96
2012-03-01 07:14:32 C 11 24 21.99 +13 47 04.4 r G96
2012-03-01 07:27:13 C 11 24 21.06 +13 47 20.3 r G96
2012-03-14 05:37:09 C 10 59 58.20 +20 03 07.8 r G96
2012-03-14 05:47:59 C 10 59 57.26 +20 03 19.9 r G96
2012-03-14 05:58:56 C 10 59 56.29 +20 03 32.4 r G96
2012-03-14 06:09:50 C 10 59 55.32 +20 03 45.0 r G96
2016-02-07 08:14:33 C 11 16 49.68 +06 30 47.8 u H21
2016-02-07 08:36:01 C 11 16 48.77 +06 31 05.2 u H21
2016-02-07 09:01:18 C 11 16 47.71 +06 31 25.7 u H21
2020-02-15 11:59:11 C 10 28 59.24 +11 45 36.6 V G96
2020-02-15 12:01:16 C 10 28 59.15 +11 45 39.4 V G96
2020-02-15 12:05:26 C 10 28 58.84 +11 45 43.2 V G96
2020-02-15 12:07:31 C 10 28 58.68 +11 45 45.5 V G96
2020-03-22 02:27:20 C 09 27 35.91 +24 24 58.4 u H21
2020-03-22 02:44:19 C 09 27 35.15 +24 25 07.6 u H21