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 21:55:28 C 01 30 20.59 +18 31 38.7 w J38
2011-11-09 21:55:35 C 01 30 20.83 +18 31 38.4 w J38
2011-11-09 21:55:43 C 01 30 05.93 +18 30 59.3 t 204
2011-11-09 21:57:52 C 01 30 11.70 +18 30 51.1 t 204
2011-11-09 21:58:32 C 01 30 13.35 +18 30 51.3 u B39
2011-11-09 22:02:34 C 01 30 22.11 +18 31 13.1 u B33
2011-11-09 22:03:36 C 01 30 26.82 +18 30 31.7 u B39
2011-11-09 22:03:39 C 01 30 25.01 +18 31 08.8 u B33
2011-11-09 22:04:28 C 01 30 27.16 +18 31 05.5 u B33
2011-11-09 22:06:29 C 01 30 34.66 +18 30 17.9 t 204
2011-11-09 22:08:29 C 01 30 39.91 +18 30 10.4 t 204
2011-11-09 22:10:38 C 01 30 45.56 +18 30 02.0 t 204
2011-11-09 22:12:08 C 01 30 49.36 +18 29 58.7 u B39
2011-11-09 22:12:40 C 01 30 30.358 +18 29 01.74 r 089
2011-11-09 22:13:36 C 01 30 32.887 +18 28 57.98 r 089
2011-11-09 22:13:55 C 01 30 56.14 +18 28 16.7 u B86
2011-11-09 22:14:32 C 01 30 35.339 +18 28 53.85 r 089
2011-11-09 22:15:28 C 01 30 37.846 +18 28 50.03 r 089
2011-11-09 22:16:02 C 01 30 59.58 +18 29 44.0 u B39
2011-11-09 22:16:24 C 01 30 40.343 +18 28 46.14 r 089
2011-11-09 22:17:17 C 01 31 05.00 +18 28 03.8 u B86
2011-11-09 22:17:20 C 01 30 42.816 +18 28 42.02 r 089
2011-11-09 22:18:16 C 01 30 45.284 +18 28 38.17 r 089
2011-11-09 22:18:59 C 01 31 09.47 +18 27 57.5 u B86
2011-11-09 22:19:12 C 01 30 47.769 +18 28 34.24 r 089
2011-11-09 22:20:08 C 01 30 50.258 +18 28 30.46 r 089
2011-11-09 22:20:44 C 01 31 14.05 +18 27 50.9 u B86
2011-11-09 22:21:04 C 01 30 52.721 +18 28 26.46 r 089
2011-11-09 22:22:00 C 01 30 55.186 +18 28 22.51 r 089
2011-11-09 22:22:27 C 01 31 18.55 +18 27 44.4 u B86
2011-11-09 22:22:54 C 01 31 17.39 +18 29 17.1 u B39
2011-11-09 22:22:56 C 01 30 57.653 +18 28 18.52 r 089
2011-11-09 22:23:53 C 01 31 00.178 +18 28 14.51 r 089
2011-11-09 22:24:08 C 01 31 22.93 +18 27 38.0 u B86
2011-11-09 22:24:49 C 01 31 02.620 +18 28 10.63 r 089
2011-11-09 22:25:45 C 01 31 05.069 +18 28 06.68 r 089
2011-11-09 22:25:52 C 01 31 27.44 +18 27 31.3 u B86
2011-11-09 22:26:41 C 01 31 07.546 +18 28 02.78 r 089
2011-11-09 22:27:37 C 01 31 10.001 +18 27 58.90 r 089
2011-11-09 22:28:33 C 01 31 12.422 +18 27 54.86 r 089
2011-11-09 22:29:29 C 01 31 14.896 +18 27 50.80 r 089
2011-11-09 22:30:25 C 01 31 17.345 +18 27 47.14 r 089
2011-11-09 22:31:21 C 01 31 19.774 +18 27 43.06 r 089
2011-11-09 22:32:17 C 01 31 22.211 +18 27 38.96 r 089
2011-11-09 22:33:13 C 01 31 24.650 +18 27 35.25 r 089
2011-11-09 22:34:09 C 01 31 27.082 +18 27 31.19 r 089
2011-11-09 22:35:05 C 01 31 29.494 +18 27 27.24 r 089
2011-11-09 22:36:01 C 01 31 31.948 +18 27 23.64 r 089
2011-11-09 22:36:57 C 01 31 34.366 +18 27 19.37 r 089
2011-11-09 22:37:53 C 01 31 36.800 +18 27 15.42 r 089
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)