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
2010-04-13 23:25:12 C 12 54 19.99 -02 17 45.2 u C13
2010-04-13 23:25:55 C 12 54 19.64 -02 17 42.6 u C13
2010-04-13 23:26:19 C 12 54 19.42 -02 17 41.0 u C13
2010-04-13 23:27:04 C 12 54 19.03 -02 17 38.0 u C13
2010-04-13 23:27:28 C 12 54 18.81 -02 17 36.3 u C13
2010-04-13 23:27:48 C 12 54 18.63 -02 17 35.2 u C13
2010-04-13 23:28:32 C 12 54 18.24 -02 17 31.9 u C13
2010-04-13 23:30:42 C 12 54 17.09 -02 17 23.6 u C13
2010-04-14 06:04:47 C 12 50 58.38 -01 49 36.0 15.6 c 704
2010-04-14 06:06:01 C 12 50 58.55 -01 49 49.4 r 718
2010-04-14 06:15:36 C 12 50 52.99 -01 49 07.9 r 718
2010-04-14 06:20:13 C 12 50 46.60 -01 48 32.8 u H45
2010-04-14 06:20:56 C 12 50 46.19 -01 48 29.6 u H45
2010-04-14 06:21:29 C 12 50 48.62 -01 48 23.3 15.8 c 704
2010-04-14 06:21:48 C 12 50 45.70 -01 48 25.9 u H45
2010-04-14 06:22:25 C 12 50 45.32 -01 48 23.1 u H45
2010-04-14 06:23:37 C 12 50 44.61 -01 48 18.0 u H45
2010-04-14 06:24:21 C 12 50 44.20 -01 48 14.5 u H45
2010-04-14 06:25:16 C 12 50 43.66 -01 48 10.9 u H45
2010-04-14 06:25:18 C 12 50 47.34 -01 48 25.7 r 718
2010-04-14 06:26:00 C 12 50 43.22 -01 48 07.6 u H45
2010-04-14 06:26:51 C 12 50 42.74 -01 48 03.8 u H45
2010-04-14 06:27:35 C 12 50 42.30 -01 48 00.5 u H45
2010-04-14 06:38:11 C 12 50 38.78 -01 47 10.1 15.9 c 704
2010-04-14 06:54:57 C 12 50 28.90 -01 45 56.6 15.8 c 704
2010-04-14 07:11:39 C 12 50 19.01 -01 44 42.7 15.8 c 704
2010-04-14 07:19:16 C 12 50 12.64 -01 44 23.6 u H36
2010-04-14 07:24:40 C 12 50 09.49 -01 43 59.7 u H36
2010-04-14 07:29:44 C 12 50 06.43 -01 43 37.1 u H36
2010-04-14 07:58:34 C 12 49 48.41 -01 41 30.2 r H21
2010-04-14 07:59:22 C 12 49 47.94 -01 41 26.6 r H21
2010-04-14 08:00:10 C 12 49 47.47 -01 41 23.1 r H21
2010-04-14 08:01:04 C 12 49 46.95 -01 41 19.1 r H21
2010-04-14 08:02:08 C 12 49 46.31 -01 41 14.2 r H21
2010-04-14 08:03:40 C 12 49 45.42 -01 41 07.4 r H21
2010-04-14 20:54:34 C 12 42 13.69 -00 38 12.4 w 213
2010-04-14 20:59:46 C 12 42 10.14 -00 37 45.0 w 213
2010-04-14 21:01:56 C 12 42 08.56 -00 37 32.8 w 213
2010-04-14 21:07:19 C 12 42 04.77 -00 37 04.1 w 213
2010-04-14 21:16:43 C 12 41 58.11 -00 36 13.3 w 213
2010-04-14 21:17:58 C 12 41 57.24 -00 36 40.9 o J16
2010-04-14 21:23:09 C 12 41 53.62 -00 36 12.4 o J16
2010-04-14 21:28:34 C 12 41 49.84 -00 35 42.9 o J16
2010-04-14 21:33:41 C 12 41 46.24 -00 35 15.6 o J16
2010-04-14 21:38:56 C 12 41 42.53 -00 34 46.6 o J16
2010-04-14 21:44:03 C 12 41 38.92 -00 34 19.4 o J16
2010-04-14 22:25:59 C 12 41 08.63 -00 30 22.8 u J95
2010-04-14 22:34:37 C 12 41 02.43 -00 29 35.4 u J95
2010-04-14 22:43:11 C 12 40 56.23 -00 28 48.0 u J95
2010-04-15 01:09:04 C 12 39 21.51 -00 14 38.2 o I15
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)