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
2011-11-09 20:12:33 C 01 24 55.701 +18 36 57.75 o 461
2011-11-09 20:12:56 C 01 24 56.913 +18 36 56.34 o 461
2011-11-09 20:13:20 C 01 24 58.144 +18 36 54.79 o 461
2011-11-09 20:13:25 C 01 25 10.03 +18 37 22.3 u B39
2011-11-09 20:15:21 C 01 25 16.05 +18 37 15.6 u B39
2011-11-09 20:15:57 C 01 25 17.89 +18 37 13.9 u B39
2011-11-09 20:18:27 C 01 25 25.66 +18 37 04.1 u B39
2011-11-09 20:18:59 C 01 25 27.29 +18 37 02.5 u B39
2011-11-09 20:20:03 C 01 25 30.60 +18 36 58.4 u B39
2011-11-09 20:20:21 C 01 25 40.89 +18 38 01.0 u C27
2011-11-09 20:21:19 C 01 25 34.50 +18 36 54.3 u B39
2011-11-09 20:22:43 C 01 25 39.31 +18 34 52.9 u C39
2011-11-09 20:22:58 C 01 25 39.61 +18 36 48.0 u B39
2011-11-09 20:25:24 C 01 25 42.36 +18 36 41.5 u 595
2011-11-09 20:25:43 C 01 25 48.06 +18 36 37.8 u B39
2011-11-09 20:28:32 C 01 25 56.60 +18 36 27.7 u B39
2011-11-09 20:30:12 C 01 25 59.794 +18 36 30.77 c 560
2011-11-09 20:30:14 C 01 25 38.035 +18 36 07.44 r 089
2011-11-09 20:30:56 C 01 26 02.063 +18 36 28.15 c 560
2011-11-09 20:31:05 C 01 26 01.75 +18 37 36.3 u A81
2011-11-09 20:31:10 C 01 25 40.899 +18 36 03.69 r 089
2011-11-09 20:31:48 C 01 26 04.679 +18 36 25.19 c 560
2011-11-09 20:31:50 C 01 26 15.95 +18 37 20.6 u C27
2011-11-09 20:32:06 C 01 25 43.733 +18 35 59.85 r 089
2011-11-09 20:32:33 C 01 26 06.913 +18 36 22.07 c 560
2011-11-09 20:33:02 C 01 25 46.558 +18 35 56.38 r 089
2011-11-09 20:33:58 C 01 25 49.392 +18 35 52.20 r 089
2011-11-09 20:34:54 C 01 25 52.252 +18 35 47.98 r 089
2011-11-09 20:35:45 C 01 26 29.04 +18 36 23.2 u 958
2011-11-09 20:35:50 C 01 25 55.082 +18 35 44.37 r 089
2011-11-09 20:36:23 C 01 26 31.19 +18 36 21.0 u 958
2011-11-09 20:36:46 C 01 25 57.930 +18 35 41.00 r 089
2011-11-09 20:37:01 C 01 26 32.97 +18 36 18.5 u 958
2011-11-09 20:37:18 C 01 26 24.16 +18 34 01.8 u C39
2011-11-09 20:37:39 C 01 26 34.71 +18 36 16.2 u 958
2011-11-09 20:37:42 C 01 26 00.731 +18 35 37.05 r 089
2011-11-09 20:38:17 C 01 26 36.60 +18 36 14.4 u 958
2011-11-09 20:38:38 C 01 26 03.521 +18 35 33.15 r 089
2011-11-09 20:38:55 C 01 26 38.55 +18 36 11.9 u 958
2011-11-09 20:39:33 C 01 26 40.79 +18 36 09.1 u 958
2011-11-09 20:39:34 C 01 26 06.376 +18 35 29.52 r 089
2011-11-09 20:40:12 C 01 26 42.36 +18 36 07.6 u 958
2011-11-09 20:40:30 C 01 26 09.164 +18 35 25.23 r 089
2011-11-09 20:40:50 C 01 26 44.27 +18 36 05.6 u 958
2011-11-09 20:45:10 C 01 26 23.157 +18 35 06.18 r 089
2011-11-09 20:45:56 C 01 26 57.18 +18 36 34.1 w C12
2011-11-09 20:46:06 C 01 26 25.949 +18 35 02.64 r 089
2011-11-09 20:47:02 C 01 26 28.765 +18 34 58.73 r 089
2011-11-09 20:48:33 C 01 27 04.91 +18 36 24.7 w C12
2011-11-09 20:49:09 C 01 27 14.34 +18 37 27.0 w I88
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)