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
2011-11-10 20:35:07 C 02 04 13.29 +17 35 51.2 c A53
2011-11-10 20:35:58 C 02 04 19.60 +17 35 53.1 u 958
2011-11-10 20:36:01 C 02 04 13.89 +17 35 50.0 c A53
2011-11-10 20:37:49 C 02 04 15.05 +17 35 47.6 c A53
2011-11-10 20:37:53 C 02 04 20.85 +17 35 51.0 u 958
2011-11-10 20:38:54 C 02 04 19.41 +17 34 43.1 u J95
2011-11-10 20:39:46 C 02 04 19.99 +17 34 42.0 u J95
2011-11-10 20:39:48 C 02 04 21.99 +17 35 47.1 u 958
2011-11-10 20:40:55 C 02 04 20.74 +17 34 40.7 u J95
2011-11-10 20:41:52 C 02 04 17.65 +17 35 42.7 c A53
2011-11-10 20:44:20 C 02 04 20.19 +17 35 35.3 o 147
2011-11-10 20:45:04 C 02 04 19.86 +17 35 50.5 u 104
2011-11-10 20:45:17 C 02 04 20.15 +17 35 54.8 u B33
2011-11-10 20:49:24 C 02 04 28.25 +17 35 37.1 u 958
2011-11-10 20:53:37 C 02 04 30.91 +17 35 31.7 u 958
2011-11-10 20:55:20 C 02 04 31.97 +17 35 29.6 u 958
2011-11-10 20:57:11 C 02 04 28.33 +17 35 18.7 o 147
2011-11-10 21:00:05 C 02 04 29.30 +17 35 30.7 u 104
2011-11-10 21:00:17 C 02 04 29.55 +17 35 35.1 u B33
2011-11-10 21:00:26 C 02 04 30.36 +17 35 14.8 o 147
2011-11-10 21:03:39 C 02 04 32.37 +17 35 10.4 o 147
2011-11-10 21:15:04 C 02 04 38.57 +17 35 10.8 u 104
2011-11-10 21:22:55 C 02 04 44.32 +17 34 45.2 o 147
2011-11-10 21:26:08 C 02 04 46.29 +17 34 41.0 o 147
2011-11-10 21:29:20 C 02 04 48.25 +17 34 36.4 o 147
2011-11-10 21:30:04 C 02 04 47.73 +17 34 50.3 u 104
2011-11-10 21:35:47 C 02 04 52.17 +17 34 28.0 o 147
2011-11-10 21:38:59 C 02 04 54.11 +17 34 23.6 o 147
2011-11-10 21:42:06 C 02 04 54.98 +17 34 33.7 u 104
2011-11-10 21:42:12 C 02 04 56.06 +17 34 19.1 o 147
2011-11-10 21:45:25 C 02 04 57.99 +17 34 14.0 o 147
2011-11-10 21:47:13 C 02 05 07.42 +17 35 19.5 d I92
2011-11-10 21:48:25 C 02 04 59.78 +17 34 10.7 o 147
2011-11-10 22:01:56 C 02 05 16.06 +17 35 01.2 d I92
2011-11-10 22:09:27 C 02 05 20.43 +17 34 51.9 d I92
2011-11-10 22:16:57 C 02 05 24.75 +17 34 42.3 d I92
2011-11-10 22:47:15 C 02 05 34.35 +17 32 36.8 u B67
2011-11-10 22:50:01 C 02 05 36.03 +17 32 32.9 u B67
2011-11-10 22:52:50 C 02 05 37.56 +17 32 28.6 u B67
2011-11-10 22:53:55 C 02 05 42.87 +17 32 56.7 u 958
2011-11-10 22:55:54 C 02 05 43.99 +17 32 53.4 u 958
2011-11-10 22:55:56 C 02 05 39.40 +17 32 23.8 u B67
2011-11-10 22:57:40 C 02 05 45.03 +17 32 51.6 u 958
2011-11-10 22:58:50 C 02 05 41.10 +17 32 19.8 u B67
2011-11-10 23:00:16 C 02 05 46.46 +17 32 47.3 u 958
2011-11-10 23:01:54 C 02 05 42.80 +17 32 15.9 u B67
2011-11-10 23:02:03 C 02 05 47.52 +17 32 45.1 u 958
2011-11-10 23:04:01 C 02 05 48.58 +17 32 41.7 u 958
2011-11-10 23:05:06 C 02 05 44.71 +17 32 10.7 u B67
2011-11-10 23:08:11 C 02 05 46.43 +17 32 06.3 u B67
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)