308635 (2005 YU55)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.4304838155 ± 1.25e-09
Semi-major axis (a)1.1568617123 AU ± 9.63e-10
Inclination (i)0.33982909° ± 2.53e-07
Long. of Asc. Node (Ω)35.92264006° ± 8.03e-06
Arg. of Perihelion (ω)273.57015732° ± 8.00e-06
Mean Anomaly (M)146.19378132° ± 6.56e-06
Mean Motion (n)0.7921184052°/day ± 9.89e-10
Perihelion dist (q)0.65885147 AU ± 1.55e-09
Aphelion dist (Q)1.65487196 AU ± 2.00e-09
Orbital Period1.24429161 yr ± 1.55e-09
Physical Parameters
H (abs. magnitude)21.91
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-01
RMS Residual0.266″
Uncertainty0
Orbit TypeApollo
MOID0.000492 AU
Observations Used3822
Radar Obs Used19
Oppositions1
Arc Total2005-2022
First Observation Used2005-12-24
Last Observation Used2022-01-06
Observations (4006)
Date Type RA Dec Mag Band Observatory
2011-11-19 17:04:35 C 02 33 14.05 +16 33 24.2 16.7 u C20
2011-11-19 17:07:35 C 02 33 14.08 +16 33 24.2 17.6 u C20
2011-11-19 17:11:23 C 02 33 14.13 +16 33 24.4 17.0 u C20
2011-11-19 17:14:21 C 02 33 14.16 +16 33 24.4 16.6 u C20
2011-11-19 17:16:43 C 02 33 14.19 +16 33 24.4 17.4 u C20
2011-11-19 17:19:20 C 02 33 14.21 +16 33 24.5 17.0 u C20
2011-11-19 17:21:29 C 02 33 14.23 +16 33 24.4 16.5 u C20
2011-11-19 17:23:39 C 02 33 14.26 +16 33 24.4 17.5 u C20
2011-11-19 17:28:26 C 02 33 14.31 +16 33 24.5 17.1 u C20
2011-11-19 17:30:44 C 02 33 14.33 +16 33 24.6 16.7 u C20
2011-11-19 17:32:53 C 02 33 14.36 +16 33 24.7 17.4 u C20
2011-11-19 17:35:09 C 02 33 14.38 +16 33 24.6 17.0 u C20
2011-11-19 17:47:11 C 02 33 14.48 +16 33 24.8 16.7 u C20
2011-11-19 17:49:21 C 02 33 14.51 +16 33 24.8 17.4 u C20
2011-11-19 17:51:47 C 02 33 14.53 +16 33 24.7 17.1 u C20
2011-11-19 17:54:00 C 02 33 14.55 +16 33 24.8 16.7 u C20
2011-11-19 17:56:15 C 02 33 14.57 +16 33 24.8 17.3 u C20
2011-11-19 18:10:11 C 02 33 14.67 +16 33 25.1 16.7 u C20
2011-11-19 18:12:22 C 02 33 14.70 +16 33 25.0 17.6 u C20
2011-11-19 18:15:47 C 02 33 14.72 +16 33 24.9 17.1 u C20
2011-11-19 18:18:00 C 02 33 14.74 +16 33 25.1 16.7 u C20
2011-11-19 18:20:11 C 02 33 14.76 +16 33 25.0 17.6 u C20
2011-11-19 18:23:03 C 02 33 14.79 +16 33 24.6 17.3 u C20
2011-11-19 18:25:25 C 02 33 14.80 +16 33 24.6 16.6 u C20
2011-11-19 18:27:38 C 02 33 14.81 +16 33 24.5 17.7 u C20
2011-11-19 18:29:51 C 02 33 14.84 +16 33 24.6 17.1 u C20
2011-11-19 18:32:40 C 02 33 14.85 +16 33 24.9 16.7 u C20
2011-11-19 18:35:02 C 02 33 14.86 +16 33 24.9 17.6 u C20
2011-11-19 18:37:19 C 02 33 14.88 +16 33 24.8 17.2 u C20
2011-11-19 18:39:28 C 02 33 14.91 +16 33 24.5 16.6 u C20
2011-11-19 18:42:19 C 02 33 14.93 +16 33 24.4 17.6 u C20
2011-11-19 18:44:57 C 02 33 14.94 +16 33 24.4 17.1 u C20
2011-11-19 18:53:38 C 02 33 15.00 +16 33 24.3 16.7 u C20
2011-11-19 18:58:21 C 02 33 15.03 +16 33 24.1 17.5 u C20
2011-11-19 19:00:33 C 02 33 15.05 +16 33 24.0 17.1 u C20
2011-11-19 19:02:47 C 02 33 15.06 +16 33 24.0 16.7 u C20
2011-11-19 19:10:52 C 02 33 15.11 +16 33 23.8 17.1 u C20
2011-11-19 19:15:03 C 02 33 15.13 +16 33 23.7 16.7 u C20
2011-11-19 19:17:25 C 02 33 15.15 +16 33 23.7 17.6 u C20
2011-11-19 19:19:46 C 02 33 15.17 +16 33 23.6 17.1 u C20
2011-11-19 19:22:01 C 02 33 15.18 +16 33 23.5 16.6 u C20
2011-11-19 19:34:58 C 02 33 15.26 +16 33 23.0 17.6 u C20
2011-11-19 19:37:30 C 02 33 15.28 +16 33 23.0 17.0 u C20
2011-11-19 19:39:50 C 02 33 15.28 +16 33 23.1 16.7 u C20
2011-11-19 19:42:04 C 02 33 15.30 +16 33 22.7 17.5 u C20
2011-11-19 19:44:19 C 02 33 15.32 +16 33 22.7 17.0 u C20
2011-11-19 19:46:36 C 02 33 15.32 +16 33 22.6 16.6 u C20
2011-11-19 19:48:45 C 02 33 15.34 +16 33 22.5 17.7 u C20
2011-11-19 19:51:13 C 02 33 15.36 +16 33 22.4 17.1 u C20
2011-11-19 19:55:05 C 02 33 15.37 +16 33 22.2 16.6 u C20
Radar Observations (19)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2010-04-19 21:44:00 -38992.1391 1 Hz 2380 -1 -1
2010-04-19 22:25:00 -43083.5482 0.5 Hz 2380 -1 -1
2010-04-19 22:34:00 15461068.67 1 us 2380 -1 -1
2010-04-19 22:34:00 -43977.4883 0.15 Hz 2380 -1 -1
2010-04-20 20:10:00 18135130.09 1 us 2380 -1 -1
2010-04-20 20:10:00 -114203.0344 0.15 Hz 2380 -1 -1
2010-04-21 18:57:00 22886379.62 1 us 2380 -1 -1
2011-11-04 17:30:00 793291.811 0.3 Hz 8560 -14 -14
2011-11-04 18:00:00 33361799.08 10 us 8560 -14 -14
2011-11-04 18:30:00 33195759.94 1.5 us 8560 -14 -14
2011-11-06 19:20:00 776779.375 0.2 Hz 8560 -13 -14
2011-11-06 21:20:00 16560666.47 2 us 8560 -14 -14
2011-11-07 20:20:00 756959.176 0.4 Hz 8560 -13 -14
2011-11-10 04:30:00 -750708.318 0.5 Hz 8560 -13 -14
2011-11-10 05:00:00 -753670.256 0.5 Hz 8560 -13 -14
2011-11-11 02:20:00 -754437.625 0.5 Hz 8560 -13 -14
2011-11-13 02:47:00 32606296.07 0.5 us 2380 -1 -1
2011-11-14 03:43:00 40796887.06 0.5 us 2380 -1 -1
2011-11-19 03:10:00 80470957.8 0.75 us 2380 -1 -1
Station codes
-14 DSS-14 Goldstone (70-m) -13 DSS-13 Goldstone (34-m) -1 Arecibo (305-m, 1963–2020)