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
2010-03-06 08:12:43 C 13 41 27.24 -09 15 35.3 o H21
2010-03-12 11:13:28 C 13 44 35.81 -09 27 34.6 o 291
2010-03-12 11:30:39 C 13 44 36.01 -09 27 35.6 o 291
2010-03-12 11:51:46 C 13 44 36.20 -09 27 35.7 o 291
2010-03-13 08:57:02 C 13 44 57.74 -09 28 36.4 o 691
2010-03-13 09:22:26 C 13 44 57.93 -09 28 38.4 o 691
2010-03-13 09:47:51 C 13 44 58.22 -09 28 39.3 o 691
2010-03-17 08:33:43 C 13 46 05.73 -09 30 25.2 o 691
2010-03-17 08:59:12 C 13 46 05.73 -09 30 25.9 o 691
2010-03-17 09:20:35 C 13 46 05.56 -09 30 25.6 u 448
2010-03-17 09:24:39 C 13 46 05.74 -09 30 25.5 o 691
2010-03-17 10:27:52 C 13 46 05.57 -09 30 25.0 u 448
2010-03-17 11:37:22 C 13 46 05.64 -09 30 24.1 u 448
2010-03-18 07:59:41 C 13 46 15.98 -09 30 08.7 o 291
2010-03-18 09:01:16 C 13 46 15.88 -09 30 07.9 o 291
2010-03-18 10:12:25 C 13 46 15.66 -09 30 06.7 o 291
2010-03-21 07:59:23 C 13 46 28.41 -09 27 18.6 o 691
2010-03-21 08:24:52 C 13 46 28.16 -09 27 17.0 o 691
2010-03-21 08:50:21 C 13 46 27.92 -09 27 15.7 o 691
2010-03-25 07:49:46 C 13 45 55.76 -09 18 01.1 o 691
2010-03-25 08:15:15 C 13 45 55.16 -09 17 57.7 o 691
2010-03-25 08:40:44 C 13 45 54.62 -09 17 54.5 o 691
2010-03-25 08:45:28 C 13 45 54.51 -09 17 53.8 o 291
2010-03-25 08:54:50 C 13 45 54.30 -09 17 52.5 o 291
2010-03-25 09:02:35 C 13 45 54.12 -09 17 51.4 o 291
2010-03-26 06:18:09 C 13 45 39.39 -09 14 43.3 o 291
2010-03-26 06:25:27 C 13 45 39.21 -09 14 42.2 o 291
2010-03-26 06:31:05 C 13 45 39.08 -09 14 41.5 o 291
2010-03-26 06:39:03 C 13 45 38.89 -09 14 40.3 o 291
2010-03-26 06:46:04 C 13 45 38.73 -09 14 39.3 o 291
2010-03-26 06:52:04 C 13 45 38.57 -09 14 38.5 o 291
2010-03-26 06:59:05 C 13 45 38.41 -09 14 37.4 o 291
2010-03-26 07:05:00 C 13 45 38.27 -09 14 36.6 o 291
2010-03-26 07:11:15 C 13 45 38.11 -09 14 35.7 o 291
2010-03-26 07:37:43 C 13 45 37.46 -09 14 31.8 o 291
2010-03-26 07:46:20 C 13 45 37.23 -09 14 30.6 o 291
2010-03-26 07:54:04 C 13 45 37.04 -09 14 29.6 o 291
2010-03-28 02:01:51 C 13 44 51.07 -09 07 03.2 v 204
2010-03-28 02:16:03 C 13 44 50.67 -09 06 59.9 v 204
2010-04-02 12:27:49 C 13 40 27.59 -08 26 40.1 u D90
2010-04-02 12:37:16 C 13 40 26.98 -08 26 36.4 u D90
2010-04-02 13:05:41 C 13 40 25.23 -08 26 25.1 u D90
2010-04-02 20:17:41 C 13 40 03.26 -08 24 38.9 c 587
2010-04-02 20:35:30 C 13 40 02.16 -08 24 31.3 c 587
2010-04-02 22:44:58 C 13 39 54.34 -08 23 32.6 c C12
2010-04-02 23:07:38 C 13 39 52.77 -08 23 22.8 w 213
2010-04-02 23:12:17 C 13 39 52.49 -08 23 20.8 c C12
2010-04-02 23:14:02 C 13 39 52.30 -08 23 19.8 w 213
2010-04-02 23:21:29 C 13 39 51.82 -08 23 16.6 w 213
2010-04-02 23:35:20 C 13 39 50.88 -08 23 10.7 w 213
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)