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
2011-11-13 21:49:00 C 02 25 33.28 +16 49 25.5 V 134
2011-11-13 21:49:44 C 02 25 33.33 +16 49 25.3 V 134
2011-11-13 21:50:26 C 02 25 33.38 +16 49 25.1 V 134
2011-11-13 21:51:09 C 02 25 33.43 +16 49 24.8 V 134
2011-11-13 21:51:52 C 02 25 33.47 +16 49 24.8 V 134
2011-11-13 21:52:37 C 02 25 33.53 +16 49 24.6 V 134
2011-11-13 21:53:20 C 02 25 33.59 +16 49 24.3 V 134
2011-11-13 21:54:04 C 02 25 33.63 +16 49 24.2 V 134
2011-11-13 21:54:46 C 02 25 33.67 +16 49 24.0 V 134
2011-11-13 21:55:29 C 02 25 33.73 +16 49 24.0 V 134
2011-11-13 21:56:13 C 02 25 33.77 +16 49 23.7 V 134
2011-11-13 21:56:56 C 02 25 33.83 +16 49 23.3 V 134
2011-11-13 21:57:40 C 02 25 33.88 +16 49 23.2 V 134
2011-11-13 21:58:22 C 02 25 33.94 +16 49 23.3 V 134
2011-11-13 21:59:05 C 02 25 33.98 +16 49 23.0 V 134
2011-11-13 21:59:49 C 02 25 34.03 +16 49 22.7 V 134
2011-11-13 22:00:32 C 02 25 34.08 +16 49 22.5 V 134
2011-11-13 22:01:14 C 02 25 34.15 +16 49 22.5 V 134
2011-11-13 22:01:58 C 02 25 34.19 +16 49 22.2 V 134
2011-11-13 22:02:41 C 02 25 34.24 +16 49 22.1 V 134
2011-11-13 22:03:25 C 02 25 34.29 +16 49 21.7 V 134
2011-11-13 22:04:09 C 02 25 34.34 +16 49 21.7 V 134
2011-11-13 22:04:52 C 02 25 34.39 +16 49 21.5 V 134
2011-11-13 22:05:34 C 02 25 34.44 +16 49 21.5 V 134
2011-11-13 22:06:18 C 02 25 34.49 +16 49 21.1 V 134
2011-11-13 22:07:01 C 02 25 34.54 +16 49 21.0 V 134
2011-11-13 22:07:45 C 02 25 34.58 +16 49 20.9 V 134
2011-11-13 22:08:29 C 02 25 34.64 +16 49 20.6 V 134
2011-11-13 22:09:12 C 02 25 34.69 +16 49 20.3 V 134
2011-11-13 22:09:54 C 02 25 34.74 +16 49 20.2 V 134
2011-11-13 22:10:37 C 02 25 34.79 +16 49 20.0 V 134
2011-11-13 22:11:21 C 02 25 34.83 +16 49 19.8 V 134
2011-11-13 22:12:04 C 02 25 34.89 +16 49 19.6 V 134
2011-11-13 22:12:48 C 02 25 34.94 +16 49 19.4 V 134
2011-11-13 22:13:30 C 02 25 34.99 +16 49 19.3 V 134
2011-11-13 22:14:13 C 02 25 35.04 +16 49 19.2 V 134
2011-11-13 22:14:57 C 02 25 35.09 +16 49 18.9 V 134
2011-11-13 22:15:41 C 02 25 35.14 +16 49 18.6 V 134
2011-11-13 22:18:39 C 02 25 35.38 +16 49 37.3 c A48
2011-11-13 22:28:44 C 02 25 36.04 +16 49 34.4 c A48
2011-11-13 22:38:51 C 02 25 36.70 +16 49 31.5 c A48
2011-11-13 22:40:22 C 02 25 31.07 +16 49 27.5 u B18
2011-11-13 22:48:57 C 02 25 37.35 +16 49 28.6 c A48
2011-11-13 23:52:52 C 02 25 42.13 +16 48 53.8 w B82
2011-11-14 00:04:52 C 02 25 42.99 +16 48 49.8 w B82
2011-11-14 00:15:40 C 02 25 43.78 +16 48 46.3 w B82
2011-11-14 03:26:51 C 02 26 18.80 +16 48 39.2 G69
2011-11-14 03:46:17 C 02 26 20.10 +16 48 37.7 G69
2011-11-14 04:06:58 C 02 26 21.40 +16 48 35.9 G69
2011-11-14 06:56:51 C 02 26 38.387 +16 48 45.50 L F51
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)