2011 ET4

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.3014974680 ± 1.14e-07
Semi-major axis (a)1.6318418056 AU ± 7.96e-08
Inclination (i)31.76210626° ± 1.92e-05
Long. of Asc. Node (Ω)347.61265685° ± 3.15e-06
Arg. of Perihelion (ω)149.52257034° ± 6.45e-05
Mean Anomaly (M)35.90281191° ± 2.16e-04
Mean Motion (n)0.4728192978°/day ± 3.46e-08
Perihelion dist (q)1.13984563 AU ± 1.95e-07
Aphelion dist (Q)2.12383798 AU ± 2.13e-07
Orbital Period2.08457288 yr ± 1.52e-07
Physical Parameters
H (abs. magnitude)20.87
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-01
RMS Residual0.245″
Uncertainty0
Orbit TypeAmor
MOID0.180742 AU
Observations Used106
Oppositions4
Arc Total2011-2018
First Observation Used2011-03-02
Last Observation Used2018-09-11
Observations (123)
Date Type RA Dec Mag Band Observatory
2011-03-17 05:19:34 C 10 33 52.79 -16 07 41.5 u 448
2011-03-26 13:30:50 C 09 54 43.36 -26 50 33.0 r E12
2011-03-26 13:40:39 C 09 54 41.96 -26 50 52.4 r E12
2011-04-08 02:16:02 C 09 29 11.53 -33 29 29.5 o 807
2011-04-08 02:29:22 C 09 29 10.84 -33 29 40.7 o 807
2011-04-08 02:38:14 C 09 29 10.38 -33 29 48.1 o 807
2011-04-08 02:51:31 C 09 29 09.69 -33 29 59.1 o 807
2011-04-24 23:39:46 C 09 25 03.90 -37 12 59.1 o 807
2011-04-24 23:48:05 C 09 25 04.01 -37 13 02.2 o 807
2011-04-25 00:16:31 C 09 25 04.35 -37 13 12.8 o 807
2011-04-25 00:43:50 C 09 25 04.74 -37 13 22.6 o 807
2014-09-18 04:16:48 C 00 47 30.38 +32 25 45.0 t 950
2014-09-18 04:19:35 C 00 47 30.14 +32 25 47.2 t 950
2014-09-18 04:22:22 C 00 47 29.83 +32 25 50.5 t 950
2014-09-18 04:25:09 C 00 47 29.61 +32 25 52.9 t 950
2014-09-18 04:27:56 C 00 47 29.32 +32 25 55.4 t 950
2014-09-18 04:30:43 C 00 47 29.07 +32 25 57.9 t 950
2016-09-06 06:07:59 C 00 12 22.43 +11 41 27.0 u H21
2016-09-06 06:33:59 C 00 12 20.26 +11 41 41.1 u H21
2016-09-06 07:03:46 C 00 12 17.74 +11 41 56.9 u H21
2018-09-11 05:22:47 C 23 16 36.17 -03 40 32.8 u H21
2018-09-11 05:33:00 C 23 16 35.22 -03 40 30.0 u H21
2018-09-11 05:44:41 C 23 16 34.14 -03 40 26.5 u H21