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
2010-04-15 01:46:02 C 12 38 53.76 -00 11 04.7 o I15
2010-04-15 02:23:57 C 12 38 24.84 -00 07 23.7 o I15
2010-04-15 05:44:53 C 12 35 53.37 +00 13 12.0 15.5 c 704
2010-04-15 05:52:09 C 12 35 44.13 +00 13 51.9 u H45
2010-04-15 05:53:07 C 12 35 43.32 +00 13 58.0 u H45
2010-04-15 05:53:58 C 12 35 42.62 +00 14 03.4 u H45
2010-04-15 05:54:54 C 12 35 41.87 +00 14 08.8 u H45
2010-04-15 05:56:10 C 12 35 40.83 +00 14 16.8 u H45
2010-04-15 05:57:15 C 12 35 39.93 +00 14 23.7 u H45
2010-04-15 05:58:11 C 12 35 39.18 +00 14 29.4 u H45
2010-04-15 05:59:13 C 12 35 38.34 +00 14 35.6 u H45
2010-04-15 06:00:29 C 12 35 37.30 +00 14 43.7 u H45
2010-04-15 06:01:03 C 12 35 40.09 +00 14 52.3 15.5 c 704
2010-04-15 06:01:21 C 12 35 36.59 +00 14 49.0 u H45
2010-04-15 06:04:15 C 12 35 33.32 +00 14 52.0 r H21
2010-04-15 06:08:00 C 12 35 30.24 +00 15 15.4 r H21
2010-04-15 06:13:23 C 12 35 25.84 +00 15 48.8 r H21
2010-04-15 06:14:59 C 12 35 24.53 +00 15 58.8 r H21
2010-04-15 06:17:17 C 12 35 26.72 +00 16 33.0 15.4 c 704
2010-04-15 06:33:27 C 12 35 13.28 +00 18 14.4 16.2 c 704
2010-04-15 06:49:40 C 12 34 59.85 +00 19 55.9 15.7 c 704
2010-04-15 06:58:45 C 12 34 53.74 +00 20 28.2 r 718
2010-04-15 07:08:27 C 12 34 45.69 +00 21 29.2 r 718
2010-04-15 07:18:13 C 12 34 37.59 +00 22 31.2 r 718
2010-04-15 21:38:45 C 12 22 05.32 +02 04 40.1 u C13
2010-04-15 21:39:03 C 12 22 05.04 +02 04 42.4 u C13
2010-04-15 21:39:35 C 12 22 04.47 +02 04 46.7 u C13
2010-04-15 21:39:52 C 12 22 04.15 +02 04 49.1 u C13
2010-04-15 21:41:06 C 12 22 02.86 +02 04 59.0 u C13
2010-04-15 21:41:55 C 12 22 01.98 +02 05 05.7 u C13
2010-04-15 22:20:31 C 12 21 23.41 +02 09 58.9 u J95
2010-04-15 22:27:36 C 12 21 13.64 +02 11 15.8 u C13
2010-04-15 22:27:52 C 12 21 13.37 +02 11 18.3 u C13
2010-04-15 22:30:25 C 12 21 10.67 +02 11 38.5 u C13
2010-04-15 22:31:31 C 12 21 09.45 +02 11 47.9 u C13
2010-04-15 22:32:39 C 12 21 08.28 +02 11 56.7 u C13
2010-04-15 22:32:57 C 12 21 07.92 +02 11 59.6 u C13
2010-04-15 22:36:16 C 12 21 06.75 +02 12 07.2 u J95
2010-04-15 22:43:16 C 12 20 59.31 +02 13 04.4 u J95
2010-04-15 22:47:47 C 12 20 52.10 +02 14 00.8 u C13
2010-04-15 22:48:35 C 12 20 51.27 +02 14 07.1 u C13
2010-04-15 22:48:51 C 12 20 50.94 +02 14 09.4 u C13
2010-04-15 22:49:55 C 12 20 49.81 +02 14 18.5 u C13
2010-04-15 22:52:25 C 12 20 47.13 +02 14 38.6 u C13
2010-04-15 22:52:41 C 12 20 46.82 +02 14 41.1 u C13
2010-04-16 01:59:32 C 12 17 43.62 +02 40 59.7 r 750
2010-04-16 02:10:41 C 12 17 31.15 +02 42 36.9 r 750
2010-04-16 02:20:25 C 12 17 20.13 +02 44 02.5 r 750
2010-04-16 02:37:52 C 12 17 00.29 +02 46 57.6 o H21
2010-04-16 02:39:00 C 12 16 59.11 +02 46 45.3 r 750
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)