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
2011-11-11 21:37:39 C 02 16 25.12 +17 09 52.6 V 134
2011-11-11 21:38:23 C 02 16 25.30 +17 09 52.2 V 134
2011-11-11 21:39:05 C 02 16 25.48 +17 09 51.8 V 134
2011-11-11 21:39:49 C 02 16 25.66 +17 09 51.2 V 134
2011-11-11 21:40:33 C 02 16 25.84 +17 09 50.8 V 134
2011-11-11 21:41:17 C 02 16 26.01 +17 09 50.4 V 134
2011-11-11 21:42:00 C 02 16 26.18 +17 09 49.8 V 134
2011-11-11 21:42:42 C 02 16 26.36 +17 09 49.4 V 134
2011-11-11 21:42:52 C 02 16 30.80 +17 10 26.3 u 958
2011-11-11 21:43:26 C 02 16 26.54 +17 09 48.9 V 134
2011-11-11 21:44:09 C 02 16 26.72 +17 09 48.5 V 134
2011-11-11 21:44:53 C 02 16 26.90 +17 09 47.9 V 134
2011-11-11 21:45:37 C 02 16 27.07 +17 09 47.5 V 134
2011-11-11 21:46:20 C 02 16 27.25 +17 09 46.9 V 134
2011-11-11 21:47:04 C 02 16 27.44 +17 09 46.7 V 134
2011-11-11 21:47:46 C 02 16 27.60 +17 09 46.0 V 134
2011-11-11 21:48:23 C 02 16 28.88 +17 09 42.8 u B86
2011-11-11 21:48:30 C 02 16 27.78 +17 09 45.5 V 134
2011-11-11 21:49:14 C 02 16 27.97 +17 09 45.1 V 134
2011-11-11 21:49:14 C 02 16 32.42 +17 10 23.8 u 958
2011-11-11 21:49:57 C 02 16 28.13 +17 09 44.6 V 134
2011-11-11 21:50:41 C 02 16 28.31 +17 09 44.1 V 134
2011-11-11 21:51:23 C 02 16 28.49 +17 09 43.6 V 134
2011-11-11 21:52:07 C 02 16 28.66 +17 09 43.0 V 134
2011-11-11 21:52:50 C 02 16 28.84 +17 09 42.7 V 134
2011-11-11 21:53:34 C 02 16 29.02 +17 09 42.2 V 134
2011-11-11 21:54:18 C 02 16 29.19 +17 09 41.7 V 134
2011-11-11 21:55:01 C 02 16 29.37 +17 09 41.3 V 134
2011-11-11 21:55:33 C 02 16 33.79 +17 10 19.5 u 958
2011-11-11 21:55:45 C 02 16 29.54 +17 09 40.7 V 134
2011-11-11 21:56:27 C 02 16 29.72 +17 09 40.1 V 134
2011-11-11 21:57:11 C 02 16 29.90 +17 09 39.8 V 134
2011-11-11 21:57:55 C 02 16 30.07 +17 09 39.4 V 134
2011-11-11 21:58:39 C 02 16 30.24 +17 09 38.8 V 134
2011-11-11 21:59:22 C 02 16 30.43 +17 09 38.3 V 134
2011-11-11 22:00:04 C 02 16 30.60 +17 09 37.8 V 134
2011-11-11 22:00:48 C 02 16 30.77 +17 09 37.3 V 134
2011-11-11 22:01:31 C 02 16 30.94 +17 09 36.9 V 134
2011-11-11 22:01:52 C 02 16 35.16 +17 10 15.5 u 958
2011-11-11 22:08:12 C 02 16 36.65 +17 10 12.1 u 958
2011-11-11 22:19:18 C 02 16 39.21 +17 10 04.6 u 958
2011-11-11 22:25:39 C 02 16 40.72 +17 10 01.0 u 958
2011-11-11 22:31:58 C 02 16 42.16 +17 09 56.5 u 958
2011-11-11 22:38:17 C 02 16 43.84 +17 09 52.4 u 958
2011-11-11 22:44:37 C 02 16 44.93 +17 09 48.2 u 958
2011-11-11 22:50:57 C 02 16 46.47 +17 09 43.9 u 958
2011-11-11 22:57:19 C 02 16 47.72 +17 09 39.8 u 958
2011-11-11 23:03:43 C 02 16 49.36 +17 09 36.4 u 958
2011-11-11 23:09:59 C 02 16 51.00 +17 09 32.5 u 958
2011-11-11 23:15:59 C 02 16 52.14 +17 09 27.5 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)