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
2011-11-11 19:25:07 C 02 15 55.33 +17 11 36.8 u 958
2011-11-11 20:03:23 C 02 16 01.96 +17 10 43.9 u B86
2011-11-11 20:10:42 C 02 16 03.97 +17 10 40.0 u B86
2011-11-11 20:18:02 C 02 16 05.89 +17 10 36.2 u B86
2011-11-11 20:25:19 C 02 16 07.81 +17 10 32.4 u B86
2011-11-11 20:29:23 C 02 16 08.82 +17 10 32.9 u 510
2011-11-11 20:32:37 C 02 16 09.74 +17 10 28.5 u B86
2011-11-11 20:38:20 C 02 16 11.15 +17 10 27.7 u 510
2011-11-11 20:39:54 C 02 16 11.60 +17 10 24.1 u B86
2011-11-11 20:42:42 C 02 16 11.34 +17 10 55.9 u 595
2011-11-11 20:45:14 C 02 16 11.98 +17 10 25.1 V 134
2011-11-11 20:45:56 C 02 16 12.18 +17 10 24.8 V 134
2011-11-11 20:46:39 C 02 16 12.34 +17 10 24.6 V 134
2011-11-11 20:47:15 C 02 16 13.49 +17 10 20.2 u B86
2011-11-11 20:47:17 C 02 16 13.45 +17 10 22.6 u 510
2011-11-11 20:47:24 C 02 16 12.54 +17 10 23.9 V 134
2011-11-11 20:48:07 C 02 16 12.73 +17 10 23.5 V 134
2011-11-11 20:48:50 C 02 16 12.90 +17 10 23.2 V 134
2011-11-11 20:49:32 C 02 16 13.07 +17 10 22.5 V 134
2011-11-11 20:50:15 C 02 16 13.27 +17 10 22.1 V 134
2011-11-11 20:51:00 C 02 16 13.46 +17 10 21.8 V 134
2011-11-11 20:51:43 C 02 16 13.63 +17 10 21.3 V 134
2011-11-11 20:52:26 C 02 16 13.83 +17 10 20.8 V 134
2011-11-11 20:53:09 C 02 16 14.00 +17 10 20.5 V 134
2011-11-11 20:53:52 C 02 16 14.19 +17 10 20.2 V 134
2011-11-11 20:54:35 C 02 16 14.36 +17 10 19.5 V 134
2011-11-11 20:55:20 C 02 16 14.55 +17 10 19.1 V 134
2011-11-11 20:56:03 C 02 16 14.73 +17 10 18.6 V 134
2011-11-11 20:56:14 C 02 16 15.75 +17 10 17.3 u 510
2011-11-11 20:56:47 C 02 16 14.92 +17 10 18.3 V 134
2011-11-11 20:57:29 C 02 16 15.11 +17 10 17.8 V 134
2011-11-11 20:58:13 C 02 16 15.30 +17 10 17.4 V 134
2011-11-11 20:58:32 C 02 16 20.00 +17 10 51.6 u 958
2011-11-11 20:58:56 C 02 16 15.48 +17 10 16.9 V 134
2011-11-11 20:59:40 C 02 16 15.66 +17 10 16.5 V 134
2011-11-11 21:00:24 C 02 16 15.85 +17 10 16.1 V 134
2011-11-11 21:01:07 C 02 16 16.02 +17 10 15.7 V 134
2011-11-11 21:01:50 C 02 16 16.21 +17 10 15.2 V 134
2011-11-11 21:02:33 C 02 16 16.39 +17 10 14.9 V 134
2011-11-11 21:03:15 C 02 16 16.41 +17 10 43.5 u 595
2011-11-11 21:03:17 C 02 16 16.57 +17 10 14.4 V 134
2011-11-11 21:04:01 C 02 16 16.77 +17 10 13.8 V 134
2011-11-11 21:04:44 C 02 16 16.94 +17 10 13.4 V 134
2011-11-11 21:04:52 C 02 16 21.48 +17 10 47.9 u 958
2011-11-11 21:05:11 C 02 16 18.03 +17 10 12.0 u 510
2011-11-11 21:05:48 C 02 16 17.20 +17 10 12.8 V 134
2011-11-11 21:06:32 C 02 16 17.38 +17 10 12.2 V 134
2011-11-11 21:07:16 C 02 16 17.58 +17 10 11.9 V 134
2011-11-11 21:07:58 C 02 16 17.74 +17 10 11.5 V 134
2011-11-11 21:08:42 C 02 16 17.93 +17 10 10.9 V 134
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)