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
2011-11-10 02:27:22 C 01 40 42.12 +18 09 38.5 u 084
2011-11-10 02:27:37 C 01 41 57.24 +18 17 32.8 c H06
2011-11-10 02:27:47 C 01 40 42.99 +18 09 37.3 u 084
2011-11-10 02:28:12 C 01 40 43.84 +18 09 35.4 u 084
2011-11-10 02:28:25 C 01 41 58.71 +18 17 31.1 c H06
2011-11-10 02:28:37 C 01 40 44.70 +18 09 34.2 u 084
2011-11-10 02:29:03 C 01 40 45.65 +18 09 32.4 u 084
2011-11-10 02:29:28 C 01 40 46.51 +18 09 31.0 u 084
2011-11-10 02:29:53 C 01 40 47.37 +18 09 29.3 u 084
2011-11-10 02:30:19 C 01 40 48.23 +18 09 27.8 u 084
2011-11-10 02:30:43 C 01 40 49.09 +18 09 27.0 u 084
2011-11-10 02:31:08 C 01 40 50.00 +18 09 25.7 u 084
2011-11-10 02:31:32 C 01 40 50.84 +18 09 23.8 u 084
2011-11-10 02:31:58 C 01 40 51.71 +18 09 22.2 u 084
2011-11-10 02:32:23 C 01 40 52.59 +18 09 20.8 u 084
2011-11-10 02:32:48 C 01 40 53.42 +18 09 19.7 u 084
2011-11-10 02:33:13 C 01 40 54.36 +18 09 17.8 u 084
2011-11-10 02:33:38 C 01 40 55.15 +18 09 16.0 u 084
2011-11-10 02:34:03 C 01 40 56.03 +18 09 14.7 u 084
2011-11-10 02:34:28 C 01 40 56.91 +18 09 13.2 u 084
2011-11-10 02:34:54 C 01 40 57.80 +18 09 12.1 u 084
2011-11-10 02:35:19 C 01 40 58.60 +18 09 10.4 u 084
2011-11-10 02:35:44 C 01 40 59.53 +18 09 09.3 u 084
2011-11-10 06:47:23 C 01 48 58.87 +18 05 37.0 o G51
2011-11-10 06:48:38 C 01 49 00.57 +18 05 33.9 o G51
2011-11-10 06:49:07 C 01 49 01.19 +18 05 32.5 o G51
2011-11-10 06:49:30 C 01 49 01.73 +18 05 31.6 o G51
2011-11-10 06:49:58 C 01 49 02.35 +18 05 30.3 o G51
2011-11-10 06:50:25 C 01 49 02.97 +18 05 29.1 o G51
2011-11-10 06:50:49 C 01 49 03.49 +18 05 27.9 o G51
2011-11-10 06:51:18 C 01 49 04.14 +18 05 26.7 o G51
2011-11-10 06:51:46 C 01 49 04.77 +18 05 25.4 o G51
2011-11-10 06:52:14 C 01 49 05.41 +18 05 24.1 o G51
2011-11-10 06:52:37 C 01 49 05.92 +18 05 23.1 o G51
2011-11-10 06:53:06 C 01 49 06.56 +18 05 21.8 o G51
2011-11-10 06:53:59 C 01 49 07.75 +18 05 19.2 o G51
2011-11-10 06:54:27 C 01 49 08.39 +18 05 17.9 o G51
2011-11-10 06:56:53 C 01 49 11.63 +18 05 11.4 o G51
2011-11-10 06:57:18 C 01 49 12.20 +18 05 10.3 o G51
2011-11-10 06:57:48 C 01 49 12.84 +18 05 08.9 o G51
2011-11-10 06:58:12 C 01 49 13.36 +18 05 07.8 o G51
2011-11-10 06:58:39 C 01 49 13.97 +18 05 06.5 o G51
2011-11-10 06:59:02 C 01 49 14.48 +18 05 05.5 o G51
2011-11-10 06:59:24 C 01 49 14.98 +18 05 04.6 o G51
2011-11-10 07:23:14 C 01 49 35.38 +18 04 13.6 u 448
2011-11-10 07:29:09 C 01 49 43.16 +18 03 55.8 u 448
2011-11-10 07:50:51 C 01 50 11.40 +18 02 50.3 u 448
2011-11-10 07:58:52 C 01 50 21.71 +18 02 26.5 u 448
2011-11-10 08:06:33 C 01 50 31.71 +18 02 03.3 u 448
2011-11-10 08:14:10 C 01 50 41.44 +18 01 39.8 u 448
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)