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
2010-04-08 21:31:38 C 13 27 01.72 -06 40 00.4 o 046
2010-04-08 21:32:48 C 13 27 01.52 -06 39 59.3 o 046
2010-04-08 21:33:58 C 13 27 01.33 -06 39 58.1 o 046
2010-04-08 21:35:08 C 13 27 01.14 -06 39 56.5 o 046
2010-04-08 21:36:18 C 13 27 00.96 -06 39 55.5 o 046
2010-04-08 21:37:27 C 13 27 00.78 -06 39 53.9 o 046
2010-04-08 21:38:37 C 13 27 00.58 -06 39 52.6 o 046
2010-04-08 21:43:59 C 13 27 01.35 -06 39 34.0 w I99
2010-04-08 21:54:56 C 13 26 59.59 -06 39 21.5 w I99
2010-04-08 22:05:54 C 13 26 57.88 -06 39 10.0 w I99
2010-04-08 22:36:59 C 13 26 51.44 -06 38 42.1 u C13
2010-04-08 22:44:56 C 13 26 50.15 -06 38 33.7 u C13
2010-04-08 22:52:39 C 13 26 49.73 -06 38 15.2 c J08
2010-04-08 22:58:54 C 13 26 48.99 -06 38 13.8 w J59
2010-04-08 23:11:31 C 13 26 45.70 -06 38 02.6 u C13
2010-04-08 23:14:12 C 13 26 46.44 -06 37 56.3 w J59
2010-04-08 23:14:47 C 13 26 44.70 -06 38 02.8 o 046
2010-04-08 23:18:47 C 13 26 44.06 -06 37 57.8 o 046
2010-04-08 23:19:12 C 13 26 44.40 -06 37 53.8 u C13
2010-04-08 23:20:17 C 13 26 43.82 -06 37 56.0 o 046
2010-04-08 23:21:40 C 13 26 43.57 -06 37 54.3 o 046
2010-04-08 23:23:02 C 13 26 43.32 -06 37 52.8 o 046
2010-04-08 23:24:29 C 13 26 43.09 -06 37 51.1 o 046
2010-04-08 23:25:52 C 13 26 42.87 -06 37 49.4 o 046
2010-04-08 23:27:17 C 13 26 42.65 -06 37 47.8 o 046
2010-04-08 23:28:40 C 13 26 42.40 -06 37 46.0 o 046
2010-04-08 23:29:17 C 13 26 43.51 -06 37 33.1 c J08
2010-04-08 23:30:03 C 13 26 43.76 -06 37 37.9 w J59
2010-04-08 23:30:06 C 13 26 42.16 -06 37 44.1 o 046
2010-04-08 23:31:26 C 13 26 41.93 -06 37 42.7 o 046
2010-04-08 23:32:48 C 13 26 41.71 -06 37 41.2 o 046
2010-04-08 23:34:45 C 13 26 41.39 -06 37 39.0 o 046
2010-04-08 23:40:18 C 13 26 40.47 -06 37 32.8 o 046
2010-04-08 23:45:08 C 13 26 39.64 -06 37 27.0 o 046
2010-04-08 23:46:33 C 13 26 39.40 -06 37 25.3 o 046
2010-04-08 23:47:55 C 13 26 39.18 -06 37 23.6 o 046
2010-04-08 23:49:20 C 13 26 38.94 -06 37 22.0 o 046
2010-04-09 01:57:24 C 13 26 25.22 -06 34 42.3 r 750
2010-04-09 02:05:09 C 13 26 24.06 -06 34 32.1 r 750
2010-04-09 02:13:37 C 13 26 22.68 -06 34 22.0 r 750
2010-04-09 02:20:55 C 13 26 21.53 -06 34 14.0 r 750
2010-04-09 05:33:03 C 13 25 51.25 -06 30 06.9 o 695
2010-04-09 05:48:11 C 13 25 48.57 -06 29 48.8 o 695
2010-04-09 06:05:25 C 13 25 45.50 -06 29 27.8 o 695
2010-04-09 09:15:51 C 13 25 09.03 -06 25 33.6 u H45
2010-04-09 09:17:43 C 13 25 08.70 -06 25 31.0 u H45
2010-04-09 09:19:33 C 13 25 08.37 -06 25 28.7 u H45
2010-04-09 09:21:14 C 13 25 08.08 -06 25 26.4 u H45
2010-04-09 09:22:31 C 13 25 07.83 -06 25 24.9 u H45
2010-04-09 09:24:19 C 13 25 07.53 -06 25 22.4 u H45
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)