144411 (2004 EW9)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.5339217436 ± 4.33e-10
Semi-major axis (a)1.9171752718 AU ± 1.10e-10
Inclination (i)8.79432051° ± 5.76e-07
Long. of Asc. Node (Ω)288.78678844° ± 2.63e-06
Arg. of Perihelion (ω)8.18075153° ± 2.93e-06
Mean Anomaly (M)8.37493834° ± 1.68e-07
Mean Motion (n)0.3712953823°/day ± 3.19e-11
Perihelion dist (q)0.89355371 AU ± 8.31e-10
Aphelion dist (Q)2.94079684 AU ± 8.47e-10
Orbital Period2.65456111 yr ± 2.28e-10
Physical Parameters
H (abs. magnitude)16.54
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-01
RMS Residual0.235″
Uncertainty0
Orbit TypeApollo
MOID0.091125 AU
Observations Used2438
Radar Obs Used8
Oppositions12
Arc Total2001-2020
First Observation Used2001-03-14
Last Observation Used2025-03-25
Observations (2564)
Date Type RA Dec Mag Band Observatory
2011-12-04 14:35:51 C 11 53 50.377 -06 07 09.21 L F51
2011-12-04 14:42:32 C 11 53 50.736 -06 07 12.36 L F51
2012-03-04 09:55:44 C 13 03 57.47 -24 56 55.2 18.3 c 704
2012-03-04 10:12:15 C 13 03 57.21 -24 57 03.5 18.2 c 704
2012-03-04 10:28:48 C 13 03 56.96 -24 57 11.3 18.5 c 704
2012-03-04 10:45:19 C 13 03 56.67 -24 57 20.3 18.4 c 704
2012-03-04 11:01:58 C 13 03 56.40 -24 57 29.4 18.5 c 704
2012-03-15 10:49:49 C 12 57 27.741 -27 09 17.21 L F51
2012-03-15 11:06:22 C 12 57 27.067 -27 09 25.12 L F51
2012-03-15 12:00:24 C 12 57 24.885 -27 09 50.65 L F51
2012-03-15 12:16:05 C 12 57 24.256 -27 09 57.94 L F51
2012-03-29 09:02:02 C 12 39 27.031 -29 23 20.01 L F51
2012-03-29 09:06:49 C 12 39 26.673 -29 23 21.58 L F51
2012-03-29 09:19:10 C 12 39 25.769 -29 23 24.77 L F51
2012-03-29 09:23:56 C 12 39 25.380 -29 23 27.08 L F51
2012-03-30 15:29:38 C 12 37 13.381 -29 32 14.99 r E12
2012-03-30 15:51:53 C 12 37 11.637 -29 32 21.19 r E12
2012-03-30 16:14:21 C 12 37 09.886 -29 32 27.34 r E12
2012-03-30 16:36:50 C 12 37 08.138 -29 32 33.47 r E12
2012-04-01 06:41:57 C 12 34 14.63 -29 43 12.4 17.4 c 704
2012-04-01 06:57:04 C 12 34 13.37 -29 43 16.4 17.6 c 704
2012-04-01 07:12:07 C 12 34 12.15 -29 43 20.3 17.6 c 704
2012-04-01 07:27:10 C 12 34 10.92 -29 43 24.0 17.5 c 704
2012-04-01 07:42:17 C 12 34 09.66 -29 43 28.0 17.4 c 704
2012-04-26 11:46:57 C 11 35 15.706 -29 17 13.50 r E12
2012-04-26 12:17:38 C 11 35 12.362 -29 17 01.75 r E12
2012-04-26 12:33:00 C 11 35 10.701 -29 16 55.91 r E12
2012-04-28 03:06:15 C 11 31 15.50 -29 02 08.6 16.8 c 704
2012-04-28 03:21:12 C 11 31 13.84 -29 02 02.1 16.7 c 704
2012-04-28 03:36:08 C 11 31 12.22 -29 01 56.8 16.8 c 704
2012-04-28 03:51:08 C 11 31 10.63 -29 01 49.6 16.9 c 704
2012-04-28 04:06:08 C 11 31 09.03 -29 01 43.7 18.8 c 704
2012-05-10 05:59:49 C 11 04 29.461 -26 27 45.04 L F51
2012-05-10 06:16:18 C 11 04 28.007 -26 27 34.71 L F51
2012-06-07 22:48:55 C 10 27 13.57 -17 43 18.1 o 807
2012-06-07 22:55:11 C 10 27 13.27 -17 43 12.1 o 807
2012-08-02 02:35:28 C 05 36 08.51 +46 58 49.5 u 160
2012-08-02 02:37:26 C 05 36 07.92 +46 58 52.2 u 160
2012-08-02 02:43:42 C 05 36 05.84 +46 59 00.8 u 160
2012-08-03 02:18:54 C 05 28 53.17 +47 24 46.3 u 160
2012-08-03 02:22:41 C 05 28 52.00 +47 24 51.0 u 160
2012-08-03 02:26:27 C 05 28 50.87 +47 24 55.4 u 160
2012-08-04 01:52:04 C 05 22 05.68 +47 47 10.2 u 160
2012-08-04 01:56:03 C 05 22 04.56 +47 47 14.4 u 160
2012-08-04 02:00:03 C 05 22 03.45 +47 47 18.5 u 160
2012-08-19 03:42:17 C 04 16 57.32 +50 05 03.1 u 160
2012-08-19 03:45:31 C 04 16 56.86 +50 05 03.3 u 160
2012-08-19 03:49:07 C 04 16 56.50 +50 05 04.5 u 160
2012-08-20 02:47:03 C 04 14 25.70 +50 08 02.3 u 160
2012-08-20 02:50:47 C 04 14 25.28 +50 08 03.0 u 160
Radar Observations (8)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2012-07-11 16:45:00 57252.5688 0.04 Hz 2380 -1 -1
2012-07-12 18:51:00 123271564.2 0.5 us 2380 -1 -1
2012-07-15 17:30:00 120183628 3 us 8560 -14 -14
2012-07-20 16:20:00 122765707.19 1 us 2380 -1 -1
2020-06-21 14:38:00 121746239 5 us 2380 -1 -1
2020-06-23 14:44:00 131938814.32 5 us 2380 -1 -1
2020-06-24 14:47:00 137365693.2 5 us 2380 -1 -1
2020-06-27 14:26:00 154599961.39 1 us 2380 -1 -1
Station codes
-14 DSS-14 Goldstone (70-m) -1 Arecibo (305-m, 1963–2020)