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 23:11:16 C 02 05 52.62 +17 32 32.3 u 958
2011-11-10 23:11:49 C 02 05 48.56 +17 32 00.8 u B67
2011-11-10 23:15:01 C 02 05 50.38 +17 31 56.4 u B67
2011-11-11 00:22:17 C 02 07 11.45 +17 30 43.8 13.1 r H49
2011-11-11 00:22:49 C 02 07 11.79 +17 30 43.3 13.1 r H49
2011-11-11 00:24:26 C 02 07 12.73 +17 30 42.3 13.0 r H49
2011-11-11 00:25:31 C 02 07 13.35 +17 30 41.4 13.1 r H49
2011-11-11 00:26:02 C 02 07 13.68 +17 30 41.2 13.3 r H49
2011-11-11 00:41:17 C 02 06 42.11 +17 30 19.3 u 958
2011-11-11 00:43:36 C 02 06 43.44 +17 30 15.8 u 958
2011-11-11 00:44:45 C 02 06 44.02 +17 30 14.5 u 958
2011-11-11 00:45:31 C 02 06 44.41 +17 30 14.3 u 958
2011-11-11 00:45:53 C 02 06 44.60 +17 30 12.3 u 958
2011-11-11 00:47:37 C 02 06 45.54 +17 30 09.7 u 958
2011-11-11 00:48:00 C 02 06 45.78 +17 30 09.2 u 958
2011-11-11 00:48:22 C 02 07 26.58 +17 30 24.1 r H49
2011-11-11 00:48:54 C 02 07 26.89 +17 30 23.8 r H49
2011-11-11 00:49:09 C 02 06 46.42 +17 30 07.8 u 958
2011-11-11 00:49:32 C 02 06 46.60 +17 30 07.1 u 958
2011-11-11 00:49:58 C 02 07 27.52 +17 30 22.7 r H49
2011-11-11 00:51:03 C 02 07 28.12 +17 30 22.2 r H49
2011-11-11 00:51:04 C 02 06 47.39 +17 30 04.8 u 958
2011-11-11 00:51:36 C 02 07 28.43 +17 30 21.6 r H49
2011-11-11 00:52:08 C 02 07 28.74 +17 30 21.0 r H49
2011-11-11 00:52:48 C 02 06 48.40 +17 30 01.7 u 958
2011-11-11 00:53:10 C 02 06 48.56 +17 30 01.5 u 958
2011-11-11 00:54:43 C 02 06 49.41 +17 29 58.9 u 958
2011-11-11 00:55:05 C 02 06 49.60 +17 29 58.7 u 958
2011-11-11 00:56:38 C 02 06 50.44 +17 29 56.5 u 958
2011-11-11 00:57:00 C 02 06 50.68 +17 29 55.5 u 958
2011-11-11 00:58:33 C 02 06 51.46 +17 29 53.0 u 958
2011-11-11 01:00:27 C 02 06 52.51 +17 29 50.1 u 958
2011-11-11 01:01:02 C 02 06 52.82 +17 29 48.8 u 958
2011-11-11 01:01:02 C 02 07 33.73 +17 30 14.4 r H49
2011-11-11 01:01:34 C 02 07 34.06 +17 30 13.8 r H49
2011-11-11 01:02:06 C 02 07 34.34 +17 30 13.3 r H49
2011-11-11 01:02:22 C 02 06 53.56 +17 29 46.6 u 958
2011-11-11 01:02:34 C 02 06 53.73 +17 29 45.9 u 958
2011-11-11 01:03:11 C 02 07 34.94 +17 30 12.7 r H49
2011-11-11 01:03:43 C 02 07 35.25 +17 30 12.1 r H49
2011-11-11 01:04:16 C 02 07 35.55 +17 30 11.6 r H49
2011-11-11 01:04:47 C 02 07 35.84 +17 30 11.3 r H49
2011-11-11 01:05:00 C 02 07 35.98 +17 30 12.9 u H45
2011-11-11 01:05:19 C 02 07 36.13 +17 30 10.8 r H49
2011-11-11 01:05:52 C 02 07 36.43 +17 30 10.3 r H49
2011-11-11 01:06:05 C 02 06 55.50 +17 29 41.4 u 958
2011-11-11 01:07:18 C 02 07 37.23 +17 30 11.0 u H45
2011-11-11 01:08:47 C 02 06 56.94 +17 29 37.7 u 958
2011-11-11 01:10:50 C 02 07 39.20 +17 30 08.1 u H45
2011-11-11 01:11:04 C 02 06 58.22 +17 29 33.1 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)