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 11:18:57 C 01 55 31.12 +17 53 29.4 u D95
2011-11-10 11:19:25 C 01 55 31.61 +17 53 28.7 u D95
2011-11-10 11:54:16 C 01 56 06.88 +17 52 25.0 u D95
2011-11-10 11:54:29 C 01 56 07.12 +17 52 24.7 u D95
2011-11-10 11:55:25 C 01 56 08.02 +17 52 22.9 u D95
2011-11-10 13:05:39 C 01 57 15.67 +18 03 28.2 u D90
2011-11-10 13:10:04 C 01 57 19.69 +18 03 18.0 u D90
2011-11-10 13:16:54 C 01 57 25.90 +18 03 02.1 u D90
2011-11-10 13:22:45 C 01 57 31.16 +18 02 48.2 u D90
2011-11-10 13:26:12 C 01 57 34.26 +18 02 40.4 u D90
2011-11-10 13:34:00 C 01 57 41.22 +18 02 21.8 u D90
2011-11-10 13:41:38 C 01 57 47.99 +18 02 04.2 u D90
2011-11-10 13:49:09 C 01 57 54.63 +18 01 46.0 u D90
2011-11-10 13:55:48 C 01 58 00.44 +18 01 30.4 u D90
2011-11-10 14:03:22 C 01 58 07.03 +18 01 11.8 u D90
2011-11-10 15:05:22 C 01 59 40.54 +17 41 17.0 u 084
2011-11-10 15:06:11 C 01 59 41.24 +17 41 16.3 u 084
2011-11-10 15:06:59 C 01 59 42.04 +17 41 14.8 u 084
2011-11-10 15:10:54 C 01 59 45.82 +17 41 09.6 13.7 u 084
2011-11-10 15:11:42 C 01 59 46.59 +17 41 08.4 13.6 u 084
2011-11-10 15:12:30 C 01 59 47.34 +17 41 07.9 13.7 u 084
2011-11-10 17:37:18 C 02 01 53.73 +17 38 01.5 13.7 u 084
2011-11-10 17:38:06 C 02 01 54.36 +17 38 00.4 17.0 u 084
2011-11-10 17:38:55 C 02 01 54.98 +17 37 59.4 17.1 u 084
2011-11-10 17:39:44 C 02 01 55.64 +17 37 58.4 17.0 u 084
2011-11-10 17:40:32 C 02 01 56.27 +17 37 57.3 17.0 u 084
2011-11-10 17:41:21 C 02 01 56.94 +17 37 56.2 13.3 u 084
2011-11-10 17:42:44 C 02 01 58.01 +17 37 54.7 13.5 u 084
2011-11-10 17:43:33 C 02 01 58.69 +17 37 53.7 17.7 u 084
2011-11-10 17:44:21 C 02 01 59.32 +17 37 52.5 17.4 u 084
2011-11-10 17:45:44 C 02 02 00.40 +17 37 50.7 16.8 u 084
2011-11-10 17:46:33 C 02 02 01.09 +17 37 49.7 17.1 u 084
2011-11-10 17:47:22 C 02 02 01.69 +17 37 48.5 14.5 u 084
2011-11-10 17:48:18 C 02 02 02.45 +17 37 47.5 u 084
2011-11-10 17:49:06 C 02 02 03.10 +17 37 46.0 u 084
2011-11-10 17:49:55 C 02 02 03.72 +17 37 45.4 u 084
2011-11-10 17:50:53 C 02 02 04.47 +17 37 43.7 u 084
2011-11-10 17:52:03 C 02 02 05.42 +17 37 42.7 u 084
2011-11-10 17:53:11 C 02 02 06.32 +17 37 41.0 u 084
2011-11-10 18:00:06 C 02 02 27.36 +17 38 44.6 u 958
2011-11-10 18:00:13 C 02 02 11.79 +17 37 31.5 u 084
2011-11-10 18:01:03 C 02 02 12.40 +17 37 30.6 u 084
2011-11-10 18:01:51 C 02 02 13.06 +17 37 29.5 u 084
2011-11-10 18:02:00 C 02 02 28.87 +17 38 42.5 u 958
2011-11-10 18:03:55 C 02 02 30.38 +17 38 40.7 u 958
2011-11-10 18:05:34 C 02 02 15.97 +17 37 24.2 u 084
2011-11-10 18:05:50 C 02 02 31.94 +17 38 38.4 u 958
2011-11-10 18:06:33 C 02 02 16.68 +17 37 23.0 u 084
2011-11-10 18:07:31 C 02 02 17.42 +17 37 22.0 u 084
2011-11-10 18:07:45 C 02 02 33.43 +17 38 36.7 u 958
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)