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 18:08:09 C 02 02 33.71 +17 38 36.2 u 958
2011-11-10 18:08:31 C 02 02 18.23 +17 37 19.7 u 084
2011-11-10 18:09:20 C 02 02 18.84 +17 37 19.4 u 084
2011-11-10 18:09:40 C 02 02 34.97 +17 38 34.3 u 958
2011-11-10 18:10:09 C 02 02 19.45 +17 37 18.4 u 084
2011-11-10 18:11:36 C 02 02 36.48 +17 38 32.2 u 958
2011-11-10 18:13:31 C 02 02 37.98 +17 38 30.3 u 958
2011-11-10 18:13:41 C 02 02 22.17 +17 37 13.9 u 084
2011-11-10 18:14:30 C 02 02 22.80 +17 37 12.9 u 084
2011-11-10 18:15:18 C 02 02 23.42 +17 37 11.7 u 084
2011-11-10 18:15:26 C 02 02 39.45 +17 38 29.0 u 958
2011-11-10 18:17:21 C 02 02 40.99 +17 38 26.4 u 958
2011-11-10 18:17:25 C 02 02 25.06 +17 37 09.1 u 084
2011-11-10 18:19:27 C 02 02 42.63 +17 38 24.4 u 958
2011-11-10 18:19:41 C 02 02 26.75 +17 37 06.0 13.0 u 084
2011-11-10 18:20:29 C 02 02 27.37 +17 37 04.8 12.9 u 084
2011-11-10 18:21:10 C 02 02 43.92 +17 38 21.8 u 958
2011-11-10 18:21:18 C 02 02 27.97 +17 37 04.0 13.0 u 084
2011-11-10 18:22:28 C 02 02 28.86 +17 37 02.5 13.6 u 084
2011-11-10 18:23:05 C 02 02 45.50 +17 38 20.2 u 958
2011-11-10 18:23:27 C 02 02 29.61 +17 37 01.1 13.7 u 084
2011-11-10 18:24:26 C 02 02 30.40 +17 36 59.6 13.5 u 084
2011-11-10 18:25:00 C 02 02 46.95 +17 38 18.2 u 958
2011-11-10 18:25:25 C 02 02 31.13 +17 36 58.3 13.4 u 084
2011-11-10 18:26:14 C 02 02 31.75 +17 36 56.7 13.4 u 084
2011-11-10 18:26:44 C 02 02 48.29 +17 38 16.4 u 958
2011-11-10 18:27:03 C 02 02 32.36 +17 36 55.8 13.5 u 084
2011-11-10 18:28:28 C 02 02 49.64 +17 38 14.2 u 958
2011-11-10 18:30:23 C 02 02 51.13 +17 38 12.4 u 958
2011-11-10 18:32:17 C 02 02 52.57 +17 38 10.2 u 958
2011-11-10 18:33:19 C 02 02 37.07 +17 36 47.9 u 084
2011-11-10 18:34:12 C 02 02 54.01 +17 38 08.6 u 958
2011-11-10 18:34:56 C 02 02 38.29 +17 36 45.7 u 084
2011-11-10 18:36:09 C 02 02 39.18 +17 36 44.1 u 084
2011-11-10 18:38:42 C 02 02 41.10 +17 36 40.6 13.2 u 084
2011-11-10 18:39:31 C 02 02 41.69 +17 36 39.7 13.2 u 084
2011-11-10 18:40:20 C 02 02 42.32 +17 36 38.4 13.1 u 084
2011-11-10 18:41:34 C 02 02 43.22 +17 36 36.7 13.5 u 084
2011-11-10 18:42:33 C 02 02 43.94 +17 36 35.2 13.7 u 084
2011-11-10 18:43:31 C 02 02 44.70 +17 36 34.3 13.7 u 084
2011-11-10 18:44:44 C 02 02 45.58 +17 36 32.6 13.4 u 084
2011-11-10 18:44:55 C 02 03 02.17 +17 37 56.6 u 958
2011-11-10 18:45:33 C 02 02 46.21 +17 36 31.6 13.4 u 084
2011-11-10 18:46:22 C 02 02 46.80 +17 36 30.0 13.9 u 084
2011-11-10 18:47:45 C 02 02 47.81 +17 36 28.5 u 084
2011-11-10 18:48:33 C 02 02 48.38 +17 36 27.6 u 084
2011-11-10 18:49:21 C 02 02 49.04 +17 36 26.4 u 084
2011-11-10 18:52:04 C 02 02 51.00 +17 36 22.7 u 084
2011-11-10 18:52:24 C 02 03 07.74 +17 37 48.0 u 958
2011-11-10 18:52:52 C 02 02 51.61 +17 36 21.4 u 084
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)