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
2005-12-24 07:09:34 C 07 06 20.02 +23 51 01.3 c 691
2005-12-24 07:39:31 C 07 06 15.80 +23 51 08.0 c 691
2005-12-24 08:04:33 C 07 06 12.22 +23 51 13.5 c 691
2005-12-28 06:01:02 C 06 53 24.60 +24 10 07.5 c 691
2005-12-28 06:26:00 C 06 53 21.19 +24 10 11.7 c 691
2005-12-28 06:51:46 C 06 53 17.67 +24 10 16.8 c 691
2005-12-28 11:34:21 C 06 52 38.22 +24 11 02.9 d 291
2005-12-28 11:41:02 C 06 52 37.26 +24 11 04.2 d 291
2005-12-28 11:47:53 C 06 52 36.38 +24 11 03.1 d 291
2005-12-29 04:14:46 C 06 50 25.10 +24 13 51.3 r 734
2005-12-29 04:19:37 C 06 50 24.62 +24 13 52.0 d 291
2005-12-29 04:26:09 C 06 50 23.78 +24 13 53.4 d 291
2005-12-29 04:32:23 C 06 50 22.89 +24 13 54.7 d 291
2005-12-29 04:46:38 C 06 50 20.72 +24 13 54.7 r 734
2005-12-29 05:18:36 C 06 50 16.26 +24 14 01.7 r 734
2005-12-30 06:11:32 C 06 46 57.00 +24 17 54.6 o 696
2005-12-30 06:27:01 C 06 46 54.86 +24 17 57.6 o 696
2005-12-31 07:34:56 C 06 43 35.47 +24 21 30.9 o 696
2005-12-31 07:50:25 C 06 43 33.38 +24 21 32.2 o 696
2006-01-04 05:38:51 C 06 31 38.37 +24 31 40.5 d 291
2006-01-04 05:53:28 C 06 31 36.53 +24 31 40.9 d 291
2006-01-04 06:11:07 C 06 31 35.024 +24 31 44.31 o 568
2006-01-04 06:14:50 C 06 31 34.555 +24 31 44.70 o 568
2006-01-04 06:18:45 C 06 31 34.055 +24 31 45.10 o 568
2006-01-05 04:04:58 C 06 28 55.54 +24 33 24.6 d 291
2006-01-05 04:11:02 C 06 28 54.70 +24 33 24.4 d 291
2006-01-05 04:17:05 C 06 28 53.80 +24 33 25.8 d 291
2006-01-05 13:43:47 C 06 27 44.58 +24 34 06.9 F65
2006-01-05 13:46:37 C 06 27 44.15 +24 34 07.1 F65
2006-01-05 13:49:28 C 06 27 43.91 +24 34 07.5 F65
2006-01-06 04:35:06 C 06 26 00.97 +24 35 02.8 d 291
2006-01-06 04:40:57 C 06 26 00.24 +24 35 02.4 d 291
2006-01-06 04:47:06 C 06 25 59.58 +24 35 03.1 d 291
2006-01-07 02:51:09 C 06 23 26.56 +24 36 14.6 d 291
2006-01-07 02:57:01 C 06 23 25.93 +24 36 16.7 d 291
2006-01-07 03:02:56 C 06 23 25.27 +24 36 16.2 d 291
2006-01-09 05:19:42 C 06 17 49.80 +24 38 22.0 d 291
2006-01-09 05:25:55 C 06 17 49.15 +24 38 21.4 d 291
2006-01-09 05:32:56 C 06 17 48.36 +24 38 22.1 d 291
2006-01-23 03:32:08 C 05 50 14.42 +24 33 43.6 d 291
2006-01-23 03:40:47 C 05 50 14.14 +24 33 43.4 d 291
2006-01-23 03:49:18 C 05 50 13.41 +24 33 42.9 d 291
2010-02-09 15:17:33 C 13 18 47.886 -07 19 49.12 o 568
2010-02-09 15:19:42 C 13 18 47.968 -07 19 49.64 o 568
2010-02-20 12:53:02 C 13 30 24.289 -08 22 04.12 o 568
2010-02-20 12:59:11 C 13 30 24.508 -08 22 05.40 o 568
2010-03-05 10:05:19 C 13 40 52.18 -09 13 02.4 o 691
2010-03-05 10:56:10 C 13 40 53.16 -09 13 08.3 o 691
2010-03-06 07:08:08 C 13 41 25.89 -09 15 28.5 o H21
2010-03-06 07:36:54 C 13 41 26.46 -09 15 30.7 o H21
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)