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
2010-04-17 22:33:00 C 10 59 45.12 +12 36 10.2 u 510
2010-04-17 23:18:20 C 10 57 30.346 +12 50 41.98 r 089
2010-04-17 23:19:27 C 10 57 27.198 +12 51 02.87 r 089
2010-04-18 00:10:13 C 10 55 10.55 +13 07 28.0 u J95
2010-04-18 00:20:38 C 10 54 40.35 +13 10 50.9 u J95
2010-04-18 00:31:14 C 10 54 09.51 +13 14 17.9 u J95
2010-04-18 01:23:35 C 10 52 03.91 +13 33 17.9 r H21
2010-04-18 01:26:36 C 10 51 54.84 +13 34 18.5 r H21
2010-04-18 01:29:44 C 10 51 45.40 +13 35 22.0 r H21
2010-04-18 01:31:46 C 10 51 39.25 +13 36 02.9 r H21
2010-04-18 01:36:17 C 10 51 25.61 +13 37 10.4 o H26
2010-04-18 01:36:43 C 10 51 24.32 +13 37 19.4 o H26
2010-04-18 01:37:37 C 10 51 21.56 +13 37 37.5 o H26
2010-04-18 01:38:04 C 10 51 20.18 +13 37 46.4 o H26
2010-04-18 01:38:30 C 10 51 18.83 +13 37 55.8 o H26
2010-04-18 01:38:58 C 10 51 17.37 +13 38 04.9 o H26
2010-04-18 01:39:25 C 10 51 16.01 +13 38 14.2 o H26
2010-04-18 01:48:31 C 10 50 48.59 +13 41 17.6 o H26
2010-04-18 01:49:14 C 10 50 46.43 +13 41 32.5 o H26
2010-04-18 01:49:59 C 10 50 44.11 +13 41 48.3 o H26
2010-04-18 01:50:43 C 10 50 41.91 +13 42 02.6 o H26
2010-04-18 01:51:06 C 10 50 40.69 +13 42 10.4 o H26
2010-04-18 01:51:50 C 10 50 38.42 +13 42 25.6 o H26
2010-04-18 01:52:14 C 10 50 37.25 +13 42 32.9 o H26
2010-04-18 01:52:35 C 10 50 36.15 +13 42 40.7 o H26
2010-04-18 01:52:58 C 10 50 35.00 +13 42 48.3 o H26
2010-04-18 01:53:21 C 10 50 33.87 +13 42 56.0 o H26
2010-04-18 01:53:42 C 10 50 32.80 +13 43 02.8 o H26
2010-04-18 01:54:03 C 10 50 31.65 +13 43 10.8 o H26
2010-04-18 01:54:26 C 10 50 30.59 +13 43 17.8 o H26
2010-04-18 01:55:10 C 10 50 28.34 +13 43 32.8 o H26
2010-04-18 01:55:52 C 10 50 26.16 +13 43 47.1 o H26
2010-04-18 01:56:35 C 10 50 23.95 +13 44 02.0 o H26
2010-04-18 01:56:58 C 10 50 22.81 +13 44 09.5 o H26
2010-04-18 01:57:19 C 10 50 21.79 +13 44 16.5 o H26
2010-04-18 01:57:39 C 10 50 20.71 +13 44 23.4 o H26
2010-04-18 01:58:03 C 10 50 19.57 +13 44 31.1 o H26
2010-04-18 01:58:46 C 10 50 17.35 +13 44 45.9 o H26
2010-04-18 03:49:09 C 10 44 34.34 +14 22 07.8 r 750
2010-04-18 03:59:27 C 10 44 01.55 +14 25 40.3 r 750
2010-04-18 04:09:31 C 10 43 29.58 +14 29 07.8 r 750
2010-04-18 04:52:34 C 10 41 08.58 +14 44 33.8 r H21
2010-04-18 04:55:20 C 10 40 59.58 +14 45 31.2 r H21
2010-04-18 04:58:01 C 10 40 50.88 +14 46 26.5 r H21
2010-04-18 07:25:19 C 10 32 49.06 +15 38 06.4 r 718
2010-04-18 07:30:06 C 10 32 32.66 +15 39 48.2 r 718
2010-04-18 07:35:22 C 10 32 14.76 +15 41 39.4 r 718
2010-04-18 18:19:07 C 09 52 25.700 +19 40 01.67 r 089
2010-04-18 18:20:14 C 09 52 20.941 +19 40 26.35 r 089
2010-04-18 18:21:21 C 09 52 16.209 +19 40 51.56 r 089
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)