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
2011-11-14 20:54:48 C 02 27 48.316 +16 44 21.25 o C60
2011-11-14 20:57:17 C 02 27 48.29 +16 44 20.6 u 510
2011-11-14 20:57:27 C 02 27 48.440 +16 44 20.88 o C60
2011-11-14 21:00:07 C 02 27 48.559 +16 44 20.71 o C60
2011-11-14 21:02:46 C 02 27 48.682 +16 44 20.23 o C60
2011-11-14 21:05:26 C 02 27 48.812 +16 44 19.89 o C60
2011-11-14 21:06:36 C 02 27 48.72 +16 44 19.3 u 510
2011-11-14 21:08:05 C 02 27 48.930 +16 44 19.50 o C60
2011-11-14 21:10:44 C 02 27 49.046 +16 44 19.29 o C60
2011-11-14 21:13:24 C 02 27 49.166 +16 44 18.85 o C60
2011-11-14 21:15:54 C 02 27 49.14 +16 44 18.3 u 510
2011-11-14 21:16:01 C 02 27 43.83 +16 44 38.9 u B18
2011-11-14 21:16:03 C 02 27 49.292 +16 44 18.45 o C60
2011-11-14 21:18:43 C 02 27 49.416 +16 44 18.12 o C60
2011-11-14 21:21:02 C 02 27 49.32 +16 44 37.5 a 233
2011-11-14 21:21:22 C 02 27 49.524 +16 44 17.77 o C60
2011-11-14 21:23:18 C 02 27 46.51 +16 43 55.1 15.7 u 084
2011-11-14 21:24:01 C 02 27 49.655 +16 44 17.38 o C60
2011-11-14 21:25:13 C 02 27 49.57 +16 44 16.9 u 510
2011-11-14 21:26:28 C 02 27 46.68 +16 43 54.4 15.8 u 084
2011-11-14 21:26:40 C 02 27 49.774 +16 44 16.97 o C60
2011-11-14 21:29:19 C 02 27 49.890 +16 44 16.62 o C60
2011-11-14 21:29:39 C 02 27 46.83 +16 43 53.8 15.9 u 084
2011-11-14 21:31:59 C 02 27 50.010 +16 44 16.14 o C60
2011-11-14 21:33:39 C 02 27 49.81 +16 44 35.4 a 233
2011-11-14 21:34:11 C 02 27 47.09 +16 43 52.8 15.6 u 084
2011-11-14 21:34:31 C 02 27 49.97 +16 44 15.3 u 510
2011-11-14 21:34:38 C 02 27 50.124 +16 44 15.84 o C60
2011-11-14 21:37:18 C 02 27 50.237 +16 44 15.39 o C60
2011-11-14 21:39:10 C 02 27 47.34 +16 43 51.8 15.9 u 084
2011-11-14 21:39:57 C 02 27 50.362 +16 44 15.06 o C60
2011-11-14 21:42:21 C 02 27 47.52 +16 43 51.1 16.0 u 084
2011-11-14 21:42:36 C 02 27 50.477 +16 44 14.64 o C60
2011-11-14 21:43:50 C 02 27 50.40 +16 44 14.1 u 510
2011-11-14 21:44:35 C 02 27 50.23 +16 44 33.9 a 233
2011-11-14 21:45:16 C 02 27 50.595 +16 44 14.26 o C60
2011-11-14 21:45:31 C 02 27 47.68 +16 43 50.3 16.0 u 084
2011-11-14 21:48:42 C 02 27 47.81 +16 43 49.7 15.9 u 084
2011-11-14 21:52:02 C 02 27 48.03 +16 43 49.4 16.0 u 084
2011-11-14 21:52:50 C 02 27 45.40 +16 44 30.3 u B18
2011-11-14 21:55:13 C 02 27 48.14 +16 43 47.8 16.2 u 084
2011-11-14 21:58:24 C 02 27 48.35 +16 43 47.9 16.1 u 084
2011-11-14 21:58:43 C 02 27 51.179 +16 44 12.14 o C60
2011-11-14 22:01:23 C 02 27 51.300 +16 44 11.58 o C60
2011-11-14 22:01:38 C 02 27 48.49 +16 43 47.2 16.0 u 084
2011-11-14 22:04:02 C 02 27 51.417 +16 44 11.24 o C60
2011-11-14 22:04:49 C 02 27 48.66 +16 43 46.4 15.9 u 084
2011-11-14 22:06:42 C 02 27 51.533 +16 44 10.70 o C60
2011-11-14 22:07:59 C 02 27 48.81 +16 43 45.9 15.9 u 084
2011-11-14 22:09:21 C 02 27 51.649 +16 44 10.21 o C60
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)