2004 ET21

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.3239650573 ± 4.39e-07
Semi-major axis (a)1.6325419818 AU ± 1.33e-07
Inclination (i)41.60909424° ± 7.89e-05
Long. of Asc. Node (Ω)171.01735250° ± 1.26e-05
Arg. of Perihelion (ω)248.15485847° ± 7.58e-05
Mean Anomaly (M)221.50310308° ± 4.36e-04
Mean Motion (n)0.4725151513°/day ± 5.79e-08
Perihelion dist (q)1.10365543 AU ± 7.22e-07
Aphelion dist (Q)2.16142854 AU ± 7.38e-07
Orbital Period2.08591466 yr ± 2.56e-07
Physical Parameters
H (abs. magnitude)20.77
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-01
RMS Residual0.555″
Uncertainty0
Orbit TypeAmor
MOID0.272820 AU
Observations Used42
Oppositions3
Arc Total2004-2009
First Observation Used2004-03-15
Last Observation Used2009-10-14
Observations (42)
Date Type RA Dec Mag Band Observatory
2004-03-15 09:12:02 C 11 39 42.83 +08 26 10.4 c 691
2004-03-15 09:51:41 C 11 39 40.44 +08 27 32.9 c 691
2004-03-15 10:59:51 C 11 39 36.36 +08 29 56.7 c 691
2004-03-16 07:58:09 C 11 38 24.54 +09 13 43.0 d 291
2004-03-16 08:04:05 C 11 38 24.19 +09 13 55.0 d 291
2004-03-16 08:11:17 C 11 38 23.74 +09 14 10.0 d 291
2004-03-16 22:44:36 C 11 37 34.27 +09 44 05.0 c 246
2004-03-16 22:45:47 C 11 37 34.22 +09 44 08.2 c 246
2004-03-16 22:48:29 C 11 37 33.95 +09 44 11.9 c 246
2004-03-16 22:49:35 C 11 37 33.83 +09 44 15.8 c 246
2004-03-17 09:12:02 C 11 36 58.33 +10 05 25.5 d 291
2004-03-17 09:19:23 C 11 36 57.92 +10 05 40.8 d 291
2004-03-17 09:24:59 C 11 36 57.58 +10 05 52.5 d 291
2004-03-24 08:38:46 C 11 28 06.18 +15 19 04.5 o 696
2004-03-24 09:06:06 C 11 28 04.83 +15 19 51.5 o 696
2007-09-16 05:36:27 C 23 18 47.03 -07 06 32.9 19.0 c 704
2007-09-16 05:53:28 C 23 18 46.45 -07 08 12.1 19.3 c 704
2007-09-16 06:10:26 C 23 18 45.85 -07 09 50.8 19.3 c 704
2007-09-16 06:27:24 C 23 18 45.43 -07 11 29.5 19.5 c 704
2007-09-16 06:44:25 C 23 18 44.92 -07 13 08.9 19.8 c 704
2007-09-17 02:57:34 C 23 18 15.64 -09 11 47.3 r H85
2007-09-17 03:16:05 C 23 18 15.39 -09 13 36.6 o H55
2007-09-17 03:19:10 C 23 18 15.01 -09 13 55.5 r H85
2007-09-17 03:20:52 C 23 18 15.23 -09 14 04.7 o H55
2007-09-17 03:25:30 C 23 18 15.09 -09 14 32.2 o H55
2007-09-17 03:40:48 C 23 18 14.32 -09 16 04.0 r H85
2007-09-17 05:34:49 C 23 18 11.61 -09 27 14.8 18.7 c 704
2007-09-17 05:51:57 C 23 18 11.06 -09 28 55.2 18.6 c 704
2007-09-17 06:09:08 C 23 18 10.50 -09 30 37.4 19.0 c 704
2007-09-17 06:43:26 C 23 18 09.36 -09 34 00.3 19.1 c 704
2007-09-17 09:51:14 C 23 18 05.59 -09 51 55.6 o 474
2007-09-17 09:52:35 C 23 18 05.53 -09 52 03.2 o 474
2007-09-17 09:53:34 C 23 18 05.52 -09 52 09.1 o 474
2007-09-22 10:26:47 C 23 15 03.52 -21 56 30.6 r F85
2007-09-22 11:00:10 C 23 15 02.41 -21 59 49.0 r F85
2007-09-22 11:33:06 C 23 15 01.34 -22 03 04.4 r F85
2009-08-13 04:11:03 C 20 30 36.88 +38 02 32.4 o H55
2009-08-13 04:18:25 C 20 30 36.36 +38 02 24.6 o H55
2009-08-13 04:27:02 C 20 30 35.70 +38 02 15.9 o H55
2009-10-14 02:34:16 C 20 15 20.98 -18 14 48.2 o 291
2009-10-14 02:40:03 C 20 15 21.31 -18 14 59.8 o 291
2009-10-14 02:45:44 C 20 15 21.56 -18 15 11.6 o 291