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
2011-11-26 22:43:29 C 02 37 03.89 +16 32 07.6 19.2 u 084
2011-11-26 22:48:39 C 02 37 03.97 +16 32 09.2 u 084
2011-11-26 22:50:39 C 02 37 03.58 +16 32 24.1 i 071
2011-11-26 22:53:49 C 02 37 04.10 +16 32 08.7 u 084
2011-11-26 22:59:00 C 02 37 04.09 +16 32 07.3 u 084
2011-11-26 23:06:50 C 02 37 04.18 +16 32 08.0 u 084
2011-11-26 23:06:59 C 02 37 03.75 +16 32 23.8 i 071
2011-11-26 23:12:23 C 02 37 03.81 +16 32 23.8 i 071
2011-11-26 23:17:49 C 02 37 03.86 +16 32 23.8 i 071
2011-11-26 23:22:21 C 02 37 04.49 +16 32 07.5 u 084
2011-11-26 23:27:30 C 02 37 04.50 +16 32 08.3 u 084
2011-11-26 23:32:40 C 02 37 04.56 +16 32 07.8 u 084
2011-11-27 00:07:11 C 02 37 05.16 +16 32 06.5 u 084
2011-11-27 00:33:01 C 02 37 05.44 +16 32 06.6 u 084
2011-11-27 00:38:11 C 02 37 05.64 +16 32 08.1 u 084
2011-11-27 00:43:20 C 02 37 05.72 +16 32 07.6 u 084
2011-11-27 00:48:30 C 02 37 05.77 +16 32 06.8 u 084
2011-11-27 00:53:40 C 02 37 05.93 +16 32 06.0 u 084
2011-11-27 19:35:49 C 02 37 31.72 +16 32 52.2 o 461
2011-11-27 19:40:30 C 02 37 31.76 +16 32 52.6 o 461
2011-11-28 19:45:04 C 02 38 01.18 +16 33 37.8 u 585
2011-11-28 19:49:05 C 02 38 01.19 +16 33 37.7 u 585
2011-11-28 19:53:06 C 02 38 01.27 +16 33 37.7 u 585
2011-11-28 19:57:12 C 02 38 01.29 +16 33 38.2 u 585
2011-11-28 20:01:13 C 02 38 01.35 +16 33 37.7 u 585
2011-11-28 20:05:16 C 02 38 01.38 +16 33 38.2 u 585
2011-11-28 20:09:18 C 02 38 01.39 +16 33 38.5 u 585
2011-11-28 20:13:23 C 02 38 01.47 +16 33 38.5 u 585
2011-11-28 20:17:24 C 02 38 01.48 +16 33 39.5 u 585
2011-11-28 20:21:27 C 02 38 01.58 +16 33 38.4 u 585
2011-11-28 20:25:28 C 02 38 01.57 +16 33 38.7 u 585
2011-11-28 20:29:31 C 02 38 01.63 +16 33 39.1 u 585
2011-11-28 20:33:33 C 02 38 01.70 +16 33 39.3 u 585
2011-11-28 20:37:37 C 02 38 01.73 +16 33 38.8 u 585
2011-11-28 20:41:40 C 02 38 01.76 +16 33 39.3 u 585
2011-11-28 20:43:37 C 02 38 02.20 +16 33 41.8 o 461
2011-11-28 20:45:42 C 02 38 01.82 +16 33 39.0 u 585
2011-11-28 20:48:42 C 02 38 01.89 +16 33 39.6 u 585
2011-11-28 20:52:45 C 02 38 01.86 +16 33 39.1 u 585
2011-11-28 20:53:00 C 02 38 02.29 +16 33 42.1 o 461
2011-11-28 20:56:48 C 02 38 01.93 +16 33 39.6 u 585
2011-11-28 21:00:50 C 02 38 01.95 +16 33 40.0 u 585
2011-11-28 21:04:52 C 02 38 02.03 +16 33 40.3 u 585
2011-11-28 21:08:54 C 02 38 02.06 +16 33 40.2 u 585
2011-11-28 21:12:57 C 02 38 02.10 +16 33 40.0 u 585
2011-11-28 21:17:01 C 02 38 02.14 +16 33 40.6 u 585
2011-11-28 21:21:03 C 02 38 02.26 +16 33 40.5 u 585
2011-11-28 21:25:05 C 02 38 02.27 +16 33 40.4 u 585
2011-11-28 21:29:07 C 02 38 02.27 +16 33 41.0 u 585
2011-11-28 21:40:21 C 02 38 02.36 +16 33 40.7 u 585
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)