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
2011-11-09 20:49:28 C 01 27 15.28 +18 37 24.9 w I88
2011-11-09 20:49:58 C 01 27 16.75 +18 37 22.7 w I88
2011-11-09 20:50:38 C 01 27 18.68 +18 37 20.9 w I88
2011-11-09 20:50:46 C 01 26 39.857 +18 34 43.92 r 089
2011-11-09 20:51:02 C 01 27 12.20 +18 36 15.7 w C12
2011-11-09 20:51:42 C 01 26 42.650 +18 34 39.70 r 089
2011-11-09 20:52:38 C 01 26 45.413 +18 34 36.27 r 089
2011-11-09 20:53:34 C 01 26 48.166 +18 34 31.86 r 089
2011-11-09 20:54:30 C 01 26 50.928 +18 34 28.05 r 089
2011-11-09 20:55:06 C 01 27 24.00 +18 36 01.2 w C12
2011-11-09 20:55:26 C 01 26 53.677 +18 34 24.29 r 089
2011-11-09 20:56:22 C 01 26 56.385 +18 34 20.58 r 089
2011-11-09 20:57:18 C 01 26 59.176 +18 34 16.72 r 089
2011-11-09 20:57:21 C 01 27 30.58 +18 35 53.0 w C12
2011-11-09 20:58:14 C 01 27 01.923 +18 34 12.70 r 089
2011-11-09 20:58:20 C 01 27 27.03 +18 32 46.4 u C39
2011-11-09 20:59:10 C 01 27 04.680 +18 34 08.97 r 089
2011-11-09 21:00:06 C 01 27 07.376 +18 34 04.50 r 089
2011-11-09 21:00:19 C 01 27 39.15 +18 35 42.5 w C12
2011-11-09 21:01:02 C 01 27 10.134 +18 34 01.21 r 089
2011-11-09 21:01:52 C 01 27 50.99 +18 36 41.8 w I88
2011-11-09 21:01:58 C 01 27 12.859 +18 33 57.25 r 089
2011-11-09 21:02:13 C 01 27 52.08 +18 36 40.5 w I88
2011-11-09 21:02:54 C 01 27 15.574 +18 33 53.40 r 089
2011-11-09 21:03:12 C 01 27 47.49 +18 35 31.9 w C12
2011-11-09 21:03:50 C 01 27 18.310 +18 33 49.87 r 089
2011-11-09 21:03:55 C 01 27 38.44 +18 35 31.8 u A81
2011-11-09 21:04:46 C 01 27 21.010 +18 33 45.64 r 089
2011-11-09 21:05:05 C 01 27 45.02 +18 34 13.4 u B39
2011-11-09 21:05:42 C 01 27 23.709 +18 33 41.69 r 089
2011-11-09 21:06:38 C 01 27 26.450 +18 33 38.06 r 089
2011-11-09 21:07:34 C 01 27 29.157 +18 33 34.19 r 089
2011-11-09 21:08:30 C 01 27 31.871 +18 33 30.27 r 089
2011-11-09 21:09:26 C 01 27 34.584 +18 33 26.58 r 089
2011-11-09 21:10:22 C 01 27 37.269 +18 33 22.58 r 089
2011-11-09 21:11:18 C 01 27 39.954 +18 33 18.74 r 089
2011-11-09 21:12:14 C 01 27 42.669 +18 33 14.86 r 089
2011-11-09 21:13:10 C 01 27 45.355 +18 33 10.94 r 089
2011-11-09 21:14:06 C 01 27 48.033 +18 33 07.24 r 089
2011-11-09 21:15:02 C 01 27 50.703 +18 33 03.02 r 089
2011-11-09 21:15:58 C 01 27 53.395 +18 32 59.42 r 089
2011-11-09 21:16:54 C 01 27 56.077 +18 32 55.34 r 089
2011-11-09 21:17:35 C 01 28 36.56 +18 33 52.4 w J38
2011-11-09 21:17:50 C 01 27 58.720 +18 32 51.88 r 089
2011-11-09 21:18:32 C 01 28 39.24 +18 33 48.7 w J38
2011-11-09 21:18:46 C 01 28 01.419 +18 32 47.90 r 089
2011-11-09 21:19:42 C 01 28 04.104 +18 32 43.69 r 089
2011-11-09 21:20:04 C 01 28 43.56 +18 33 43.4 w J38
2011-11-09 21:20:38 C 01 28 06.751 +18 32 39.67 r 089
2011-11-09 21:21:34 C 01 28 09.419 +18 32 36.01 r 089
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)