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
2010-04-12 06:46:53 C 13 09 57.13 -04 23 35.1 u H45
2010-04-12 06:48:12 C 13 09 56.67 -04 23 31.9 u H45
2010-04-12 06:49:18 C 13 09 55.75 -04 23 37.6 o H21
2010-04-12 06:54:58 C 13 09 53.85 -04 23 23.8 o H21
2010-04-12 10:11:52 C 13 08 49.53 -04 14 58.5 o 291
2010-04-12 10:19:23 C 13 08 46.95 -04 14 39.7 o 291
2010-04-12 10:25:24 C 13 08 44.90 -04 14 23.8 o 291
2010-04-12 22:15:59 C 13 04 55.94 -03 43 05.0 u J95
2010-04-12 22:23:37 C 13 04 52.98 -03 42 43.0 u J95
2010-04-12 22:31:16 C 13 04 50.02 -03 42 20.9 u J95
2010-04-12 22:31:17 C 13 04 53.22 -03 41 31.4 r J51
2010-04-12 22:39:50 C 13 04 49.84 -03 41 06.7 r J51
2010-04-12 22:51:23 C 13 04 45.26 -03 40 33.4 r J51
2010-04-13 00:20:45 C 13 04 08.55 -03 36 13.0 w J47
2010-04-13 00:21:48 C 13 04 08.12 -03 36 09.9 w J47
2010-04-13 00:23:23 C 13 04 07.46 -03 36 05.0 w J47
2010-04-13 00:26:24 C 13 04 06.22 -03 35 56.2 w J47
2010-04-13 00:27:31 C 13 04 05.77 -03 35 52.8 w J47
2010-04-13 00:31:14 C 13 04 04.25 -03 35 42.1 w J47
2010-04-13 02:31:00 C 13 03 25.65 -03 30 15.0 r 750
2010-04-13 02:39:08 C 13 03 22.39 -03 29 50.6 r 750
2010-04-13 04:39:17 C 13 02 32.80 -03 23 27.7 r H53
2010-04-13 04:42:17 C 13 02 31.51 -03 23 18.2 r H53
2010-04-13 04:45:19 C 13 02 30.22 -03 23 08.7 r H53
2010-04-13 04:48:19 C 13 02 28.96 -03 22 59.5 r H53
2010-04-13 04:51:18 C 13 02 27.70 -03 22 49.9 r H53
2010-04-13 04:54:20 C 13 02 26.37 -03 22 40.7 r H53
2010-04-13 05:29:36 C 13 02 11.92 -03 20 43.3 u H45
2010-04-13 05:30:43 C 13 02 11.45 -03 20 39.8 u H45
2010-04-13 05:32:10 C 13 02 10.81 -03 20 35.2 u H45
2010-04-13 05:33:53 C 13 02 10.09 -03 20 29.9 u H45
2010-04-13 05:35:28 C 13 02 09.39 -03 20 24.8 u H45
2010-04-13 05:36:33 C 13 02 08.93 -03 20 21.5 u H45
2010-04-13 05:37:39 C 13 02 08.44 -03 20 17.8 u H45
2010-04-13 06:01:47 C 13 01 58.46 -03 19 10.2 u H36
2010-04-13 06:03:38 C 13 01 57.64 -03 19 04.2 u H36
2010-04-13 06:06:07 C 13 01 56.58 -03 18 56.5 u H36
2010-04-13 06:47:47 C 13 01 37.32 -03 16 44.5 o H21
2010-04-13 06:51:47 C 13 01 35.59 -03 16 31.5 o H21
2010-04-13 06:53:37 C 13 01 34.79 -03 16 25.6 o H21
2010-04-13 06:57:50 C 13 01 32.96 -03 16 12.3 o H21
2010-04-13 06:59:41 C 13 01 32.14 -03 16 06.3 o H21
2010-04-13 07:03:22 C 13 01 30.55 -03 15 54.3 o H21
2010-04-13 20:46:31 C 12 55 42.04 -02 27 54.0 r 157
2010-04-13 20:47:36 C 12 55 41.49 -02 27 49.9 r 157
2010-04-13 20:48:41 C 12 55 40.93 -02 27 45.8 r 157
2010-04-13 20:49:47 C 12 55 40.39 -02 27 41.7 r 157
2010-04-13 21:01:40 C 12 55 34.75 -02 27 01.0 u B88
2010-04-13 21:09:23 C 12 55 30.80 -02 26 32.0 u B88
2010-04-13 21:17:07 C 12 55 26.86 -02 26 02.4 u B88
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)