164201 (2004 EC)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.8600848851 ± 3.05e-08
Semi-major axis (a)1.9968627832 AU ± 1.31e-09
Inclination (i)34.58200983° ± 7.00e-06
Long. of Asc. Node (Ω)28.82252353° ± 5.91e-06
Arg. of Perihelion (ω)10.34006761° ± 6.63e-06
Mean Anomaly (M)262.66310102° ± 2.79e-06
Mean Motion (n)0.3492930480°/day ± 3.44e-10
Perihelion dist (q)0.27939129 AU ± 6.08e-08
Aphelion dist (Q)3.71433428 AU ± 6.09e-08
Orbital Period2.82177469 yr ± 2.78e-09
Physical Parameters
H (abs. magnitude)15.73
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-01
RMS Residual0.282″
Uncertainty0
Orbit TypeApollo
MOID0.412463 AU
Observations Used1059
Oppositions14
Arc Total2004-2025
First Observation Used2004-03-10
Last Observation Used2025-05-29
Observations (1134)
Date Type RA Dec Mag Band Observatory
2004-04-18 04:28:25 C 11 11 14.43 +38 17 21.1 r H41
2004-04-18 04:30:29 C 11 11 14.18 +38 17 18.2 r H41
2004-04-18 04:32:25 C 11 11 14.13 +38 17 12.5 r H41
2004-04-18 04:34:12 C 11 11 14.04 +38 17 09.3 r H41
2004-04-19 21:18:15 C 11 09 55.52 +37 01 38.8 o 084
2004-04-20 19:53:11 C 11 09 19.09 +36 21 30.0 c A48
2004-04-20 19:57:11 C 11 09 18.99 +36 21 22.7 c A48
2004-04-20 20:01:11 C 11 09 18.81 +36 21 15.8 c A48
2004-04-20 20:05:17 C 11 09 18.72 +36 21 08.2 c A48
2004-04-20 20:09:12 C 11 09 18.59 +36 21 01.6 c A48
2004-04-21 19:53:28 C 11 08 44.77 +35 39 57.1 c 434
2004-04-21 19:56:21 C 11 08 44.69 +35 39 52.8 c 434
2004-04-21 19:59:20 C 11 08 44.69 +35 39 48.0 c 434
2004-04-22 20:50:56 C 11 08 13.80 +34 57 59.0 o 084
2004-04-23 20:33:45 C 11 07 49.00 +34 19 16.4 o 084
2004-04-24 21:07:57 C 11 07 27.27 +33 40 17.2 o 084
2004-04-25 20:48:25 C 11 07 10.19 +33 03 43.6 o 084
2004-04-26 04:41:52 C 11 07 05.23 +32 51 51.3 17.9 c 704
2004-04-26 04:57:08 C 11 07 05.07 +32 51 27.8 18.4 c 704
2004-04-26 05:12:17 C 11 07 04.93 +32 51 05.1 18.5 c 704
2004-04-26 05:27:16 C 11 07 04.75 +32 50 42.4 18.4 c 704
2004-04-26 05:42:15 C 11 07 04.55 +32 50 19.6 18.0 c 704
2004-04-26 21:21:29 C 11 06 56.05 +32 26 54.0 c A41
2004-04-26 21:51:20 C 11 06 55.78 +32 26 10.4 c A41
2004-04-26 22:20:49 C 11 06 55.44 +32 25 25.7 c A41
2004-04-28 02:54:50 C 11 06 43.83 +31 43 51.1 c H41
2004-04-28 03:00:19 C 11 06 43.80 +31 43 44.8 c H41
2004-04-28 03:03:21 C 11 06 43.66 +31 43 39.3 c H41
2004-04-30 20:28:07 C 11 06 32.40 +30 13 07.1 r 170
2004-04-30 20:29:58 C 11 06 32.41 +30 13 05.0 r 170
2004-04-30 20:30:34 C 11 06 32.41 +30 13 04.3 r 170
2004-05-07 02:52:26 C 11 07 15.19 +27 06 40.3 r H41
2004-05-07 02:59:41 C 11 07 15.16 +27 06 31.6 r H41
2004-05-07 03:04:14 C 11 07 15.29 +27 06 26.1 r H41
2004-05-10 20:36:52 C 11 08 17.09 +25 27 24.4 r 240
2004-05-10 20:41:32 C 11 08 17.14 +25 27 19.6 r 240
2004-05-10 20:46:10 C 11 08 17.19 +25 27 14.7 r 240
2004-05-10 20:50:49 C 11 08 17.24 +25 27 09.7 r 240
2004-05-10 20:53:55 C 11 08 17.27 +25 27 06.4 r 240
2004-05-10 20:58:34 C 11 08 17.33 +25 27 01.4 r 240
2004-05-12 04:46:15 C 11 08 44.78 +24 53 44.3 18.6 c 704
2004-05-12 05:00:03 C 11 08 44.95 +24 53 30.2 18.9 c 704
2004-05-12 05:13:46 C 11 08 45.15 +24 53 15.2 19.5 c 704
2004-05-15 20:55:49 C 11 10 13.99 +23 25 49.1 r 941
2004-05-15 20:56:58 C 11 10 14.01 +23 25 47.9 r 941
2004-05-15 20:58:07 C 11 10 14.04 +23 25 46.8 r 941
2004-05-15 21:00:25 C 11 10 14.07 +23 25 44.8 r 941
2004-05-15 21:02:44 C 11 10 14.12 +23 25 42.4 r 941
2004-06-03 03:51:22 C 11 21 11.01 +17 21 48.5 c 926
2004-06-03 03:55:11 C 11 21 11.13 +17 21 45.1 c 926