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
2025-02-26 10:00:58 C 09 54 17.158 +01 35 54.28 V T05
2025-02-26 10:47:46 C 09 54 14.258 +01 36 04.68 V T05
2025-02-26 10:58:15 C 09 54 13.644 +01 36 07.20 V T05
2025-02-28 10:39:19 C 09 51 21.994 +01 47 09.13 V T08
2025-02-28 10:43:57 C 09 51 21.682 +01 47 10.46 V T08
2025-02-28 10:52:34 C 09 51 21.209 +01 47 12.55 V T08
2025-02-28 11:09:13 C 09 51 20.165 +01 47 16.94 V T08
2025-03-24 05:50:54 C 09 22 02.620 +04 08 54.41 X F51
2025-03-24 06:26:25 C 09 22 01.210 +04 09 02.69 X F51
2025-03-24 06:43:54 C 09 22 00.514 +04 09 06.77 X F51
2025-03-25 04:47:57 C 09 21 10.793 +04 14 11.62 V G96
2025-03-25 04:55:25 C 09 21 10.494 +04 14 14.14 V G96
2025-03-25 05:02:53 C 09 21 10.220 +04 14 14.89 V G96
2025-03-25 05:10:19 C 09 21 09.896 +04 14 16.55 V G96
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)