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 23:20:24 C 01 33 45.97 +18 26 51.1 w C35
2011-11-09 23:21:46 C 01 33 49.24 +18 26 46.5 w C35
2011-11-09 23:21:59 C 01 33 49.76 +18 26 42.7 w C35
2011-11-09 23:22:16 C 01 33 50.43 +18 26 43.9 w C35
2011-11-09 23:23:38 C 01 33 53.72 +18 26 38.7 w C35
2011-11-09 23:23:52 C 01 33 54.25 +18 26 37.7 w C35
2011-11-09 23:24:07 C 01 33 54.86 +18 26 37.0 w C35
2011-11-09 23:24:12 C 01 33 50.26 +18 25 15.8 u B39
2011-11-09 23:25:30 C 01 33 58.13 +18 26 31.7 w C35
2011-11-09 23:27:22 C 01 34 02.54 +18 26 24.1 w C35
2011-11-09 23:27:35 C 01 34 03.03 +18 26 23.1 w C35
2011-11-09 23:27:52 C 01 34 03.75 +18 26 22.3 w C35
2011-11-09 23:29:14 C 01 34 06.94 +18 26 16.9 w C35
2011-11-09 23:29:28 C 01 34 07.47 +18 26 15.0 w C35
2011-11-09 23:29:43 C 01 34 08.15 +18 26 14.6 w C35
2011-11-09 23:31:06 C 01 34 11.34 +18 26 09.3 w C35
2011-11-09 23:31:19 C 01 34 11.87 +18 26 08.4 w C35
2011-11-09 23:31:36 C 01 34 12.54 +18 26 07.4 w C35
2011-11-09 23:32:58 C 01 34 15.75 +18 26 02.3 w C35
2011-11-09 23:33:12 C 01 34 16.27 +18 26 00.8 w C35
2011-11-09 23:33:27 C 01 34 16.95 +18 25 59.4 w C35
2011-11-10 00:19:22 C 01 35 58.68 +18 17 33.0 u 084
2011-11-10 00:19:39 C 01 35 59.41 +18 17 31.8 u 084
2011-11-10 00:21:34 C 01 36 03.87 +18 17 24.5 u 084
2011-11-10 00:21:57 C 01 36 04.77 +18 17 23.0 u 084
2011-11-10 00:24:37 C 01 36 11.05 +18 17 12.7 u 084
2011-11-10 00:24:56 C 01 36 11.74 +18 17 11.5 u 084
2011-11-10 00:26:15 C 01 36 14.82 +18 17 06.6 u 084
2011-11-10 00:26:33 C 01 36 15.55 +18 17 05.4 u 084
2011-11-10 00:26:57 C 01 36 16.46 +18 17 04.0 u 084
2011-11-10 00:27:16 C 01 36 17.24 +18 17 02.6 u 084
2011-11-10 00:27:42 C 01 36 18.24 +18 17 01.1 u 084
2011-11-10 00:27:58 C 01 36 18.89 +18 17 00.0 u 084
2011-11-10 00:28:16 C 01 36 19.55 +18 16 59.1 u 084
2011-11-10 00:28:32 C 01 36 20.18 +18 16 57.8 u 084
2011-11-10 00:28:48 C 01 36 20.84 +18 16 56.8 u 084
2011-11-10 00:29:08 C 01 36 21.58 +18 16 55.6 u 084
2011-11-10 00:40:09 C 01 36 47.12 +18 16 13.5 u 084
2011-11-10 00:40:27 C 01 36 47.80 +18 16 12.2 u 084
2011-11-10 00:40:45 C 01 36 48.49 +18 16 11.2 u 084
2011-11-10 00:41:03 C 01 36 49.17 +18 16 10.1 u 084
2011-11-10 00:41:19 C 01 36 49.82 +18 16 09.0 u 084
2011-11-10 00:41:36 C 01 36 50.47 +18 16 08.0 u 084
2011-11-10 00:41:53 C 01 36 51.10 +18 16 06.8 u 084
2011-11-10 00:42:09 C 01 36 51.74 +18 16 05.9 u 084
2011-11-10 00:42:27 C 01 36 52.39 +18 16 04.9 u 084
2011-11-10 00:42:43 C 01 36 53.04 +18 16 03.8 u 084
2011-11-10 00:42:59 C 01 36 53.66 +18 16 02.7 u 084
2011-11-10 00:43:17 C 01 36 54.32 +18 16 01.5 u 084
2011-11-10 00:43:33 C 01 36 54.96 +18 16 00.6 u 084
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)