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 10:11:10 C 00 26 29.53 +19 17 14.0 o 300
2011-11-09 10:11:37 C 00 26 33.89 +19 17 13.9 o 300
2011-11-09 10:12:04 C 00 26 38.18 +19 17 14.6 o 300
2011-11-09 10:12:31 C 00 26 42.51 +19 17 15.3 o 300
2011-11-09 10:12:57 C 00 26 46.81 +19 17 15.8 o 300
2011-11-09 10:13:25 C 00 26 51.29 +19 17 16.1 o 300
2011-11-09 10:13:53 C 00 26 55.67 +19 17 16.6 o 300
2011-11-09 10:18:46 C 00 27 42.62 +19 17 20.3 o 300
2011-11-09 10:19:12 C 00 27 46.74 +19 17 20.8 o 300
2011-11-09 10:19:37 C 00 27 50.70 +19 17 21.1 o 300
2011-11-09 10:20:02 C 00 27 54.63 +19 17 21.0 o 300
2011-11-09 10:20:27 C 00 27 58.55 +19 17 21.4 o 300
2011-11-09 10:20:52 C 00 28 02.47 +19 17 21.6 o 300
2011-11-09 10:21:17 C 00 28 06.49 +19 17 21.9 o 300
2011-11-09 10:21:43 C 00 28 10.50 +19 17 22.2 o 300
2011-11-09 10:22:08 C 00 28 14.56 +19 17 22.5 o 300
2011-11-09 10:26:36 C 00 28 56.44 +19 17 24.5 o 300
2011-11-09 10:27:50 C 00 29 08.05 +19 17 25.4 o 300
2011-11-09 15:41:49 C 01 06 34.99 +18 49 07.0 11.7 u 084
2011-11-09 15:42:08 C 01 06 36.60 +18 49 06.1 11.7 u 084
2011-11-09 15:45:43 C 01 06 54.80 +18 48 55.4 12.7 u 084
2011-11-09 15:46:02 C 01 06 56.40 +18 48 54.6 12.7 u 084
2011-11-09 15:46:20 C 01 06 57.93 +18 48 53.6 12.7 u 084
2011-11-09 15:46:39 C 01 06 59.48 +18 48 52.9 12.7 u 084
2011-11-09 15:46:58 C 01 07 01.06 +18 48 51.9 u 084
2011-11-09 15:47:15 C 01 07 02.57 +18 48 51.1 12.7 u 084
2011-11-09 15:47:33 C 01 07 04.04 +18 48 50.2 12.7 u 084
2011-11-09 15:47:51 C 01 07 05.52 +18 48 49.3 12.6 u 084
2011-11-09 15:48:09 C 01 07 07.01 +18 48 48.5 u 084
2011-11-09 15:48:28 C 01 07 08.58 +18 48 47.5 12.7 u 084
2011-11-09 15:48:45 C 01 07 10.06 +18 48 46.8 12.7 u 084
2011-11-09 15:49:03 C 01 07 11.57 +18 48 45.8 12.7 u 084
2011-11-09 15:49:22 C 01 07 13.21 +18 48 44.8 12.7 u 084
2011-11-09 15:49:40 C 01 07 14.72 +18 48 44.0 12.7 u 084
2011-11-09 15:49:58 C 01 07 16.23 +18 48 43.0 12.7 u 084
2011-11-09 15:50:17 C 01 07 17.72 +18 48 42.2 12.7 u 084
2011-11-09 15:50:36 C 01 07 19.27 +18 48 41.3 12.7 u 084
2011-11-09 15:50:54 C 01 07 20.84 +18 48 40.4 12.7 u 084
2011-11-09 15:51:12 C 01 07 22.35 +18 48 39.4 12.7 u 084
2011-11-09 15:51:30 C 01 07 23.84 +18 48 38.6 12.7 u 084
2011-11-09 15:52:17 C 01 07 27.76 +18 48 36.4 12.7 u 084
2011-11-09 15:52:33 C 01 07 29.09 +18 48 35.5 12.7 u 084
2011-11-09 15:52:50 C 01 07 30.44 +18 48 34.7 12.7 u 084
2011-11-09 15:53:00 C 01 07 51.28 +18 52 48.7 u C73
2011-11-09 15:53:05 C 01 07 31.75 +18 48 33.9 12.7 u 084
2011-11-09 15:53:21 C 01 07 33.09 +18 48 33.1 12.7 u 084
2011-11-09 15:53:28 C 01 07 53.69 +18 52 47.2 u C73
2011-11-09 15:53:37 C 01 07 34.42 +18 48 32.4 12.7 u 084
2011-11-09 15:53:53 C 01 07 55.75 +18 52 46.0 u C73
2011-11-09 15:53:53 C 01 07 35.74 +18 48 31.6 12.7 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)