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
2010-04-02 23:39:30 C 13 39 50.64 -08 23 08.8 c C12
2010-04-03 05:30:49 C 13 39 32.79 -08 20 18.0 o 691
2010-04-03 05:56:16 C 13 39 31.01 -08 20 06.7 o 691
2010-04-03 06:10:10 C 13 39 30.02 -08 20 00.5 o 291
2010-04-03 06:15:33 C 13 39 29.64 -08 19 58.0 o 291
2010-04-03 06:20:54 C 13 39 29.26 -08 19 55.6 o 291
2010-04-03 06:21:41 C 13 39 29.20 -08 19 55.3 o 691
2010-04-03 07:56:59 C 13 39 21.19 -08 19 17.3 u H36
2010-04-03 08:15:35 C 13 39 19.80 -08 19 08.5 u H36
2010-04-03 08:22:00 C 13 39 19.32 -08 19 05.4 u H36
2010-04-04 04:50:39 C 13 38 06.64 -08 08 47.3 r H21
2010-04-04 04:56:13 C 13 38 06.20 -08 08 44.4 r H21
2010-04-04 05:02:36 C 13 38 05.69 -08 08 41.2 r H21
2010-04-04 05:58:11 C 13 38 02.64 -08 08 03.6 o H11
2010-04-04 06:27:44 C 13 38 00.24 -08 07 48.2 o H11
2010-04-04 06:30:42 C 13 37 59.96 -08 07 46.6 o H11
2010-04-04 07:18:50 C 13 37 56.13 -08 07 22.1 u H13
2010-04-04 07:28:29 C 13 37 55.29 -08 07 17.1 u H13
2010-04-04 07:38:11 C 13 37 54.48 -08 07 11.9 u H13
2010-04-04 07:50:28 C 13 37 52.06 -08 07 07.0 u H45
2010-04-04 07:51:59 C 13 37 51.93 -08 07 06.4 u H45
2010-04-04 07:54:46 C 13 37 51.73 -08 07 04.9 u H45
2010-04-04 07:57:19 C 13 37 51.50 -08 07 03.4 u H45
2010-04-04 07:59:38 C 13 37 51.32 -08 07 02.2 u H45
2010-04-04 08:02:47 C 13 37 51.04 -08 07 00.4 u H45
2010-04-04 08:05:22 C 13 37 50.82 -08 06 58.6 u H45
2010-04-04 08:21:08 C 13 37 50.77 -08 06 48.2 r 703
2010-04-04 08:31:07 C 13 37 49.83 -08 06 42.8 r 703
2010-04-04 08:41:08 C 13 37 49.00 -08 06 37.3 r 703
2010-04-04 08:51:12 C 13 37 48.10 -08 06 32.0 r 703
2010-04-04 14:05:20 C 13 37 28.85 -08 02 14.0 u D90
2010-04-04 14:14:59 C 13 37 28.01 -08 02 08.6 u D90
2010-04-04 14:24:37 C 13 37 27.17 -08 02 03.5 u D90
2010-04-04 14:34:28 C 13 37 26.32 -08 01 57.9 u D90
2010-04-04 14:44:14 C 13 37 25.45 -08 01 52.3 u D90
2010-04-04 22:28:37 C 13 36 53.81 -07 58 50.1 w I99
2010-04-04 22:48:24 C 13 36 52.10 -07 58 38.9 w I99
2010-04-04 23:07:48 C 13 36 50.39 -07 58 27.8 w I99
2010-04-05 00:08:29 C 13 36 45.02 -07 57 53.6 w J01
2010-04-05 00:21:56 C 13 36 43.79 -07 57 45.7 w J01
2010-04-05 00:35:46 C 13 36 42.53 -07 57 37.5 w J01
2010-04-05 08:26:42 C 13 36 05.56 -07 52 35.6 u 926
2010-04-05 08:29:36 C 13 36 05.28 -07 52 33.8 u 926
2010-04-05 08:32:28 C 13 36 04.99 -07 52 32.0 u 926
2010-04-05 22:15:04 C 13 34 59.64 -07 43 40.3 u C13
2010-04-05 23:30:22 C 13 34 51.83 -07 42 46.9 r B09
2010-04-05 23:39:11 C 13 34 50.93 -07 42 40.6 r B09
2010-04-05 23:40:08 C 13 34 50.80 -07 42 39.8 r B09
2010-04-05 23:47:59 C 13 34 50.05 -07 42 35.1 r B09
2010-04-06 00:06:22 C 13 34 50.29 -07 42 05.1 r J51
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)