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
2011-11-09 21:22:30 C 01 28 12.061 +18 32 32.10 r 089
2011-11-09 21:23:26 C 01 28 14.731 +18 32 28.12 r 089
2011-11-09 21:24:22 C 01 28 17.376 +18 32 24.33 r 089
2011-11-09 21:24:34 C 01 28 56.17 +18 33 28.0 w J38
2011-11-09 21:25:18 C 01 28 20.020 +18 32 20.49 r 089
2011-11-09 21:25:43 C 01 28 43.57 +18 32 56.4 u B39
2011-11-09 21:26:14 C 01 28 22.663 +18 32 16.58 r 089
2011-11-09 21:27:00 C 01 29 02.96 +18 33 19.2 w J38
2011-11-09 21:27:10 C 01 28 25.301 +18 32 12.74 r 089
2011-11-09 21:27:20 C 01 29 03.90 +18 33 17.9 w J38
2011-11-09 21:28:06 C 01 28 27.940 +18 32 08.90 r 089
2011-11-09 21:29:02 C 01 28 30.609 +18 32 04.79 r 089
2011-11-09 21:30:04 C 01 28 54.03 +18 33 19.3 u B33
2011-11-09 21:30:54 C 01 28 35.839 +18 31 57.19 r 089
2011-11-09 21:31:26 C 01 28 57.80 +18 33 14.1 u B33
2011-11-09 21:31:43 C 01 29 00.32 +18 32 33.3 u B39
2011-11-09 21:31:50 C 01 28 38.477 +18 31 53.38 r 089
2011-11-09 21:32:46 C 01 28 41.087 +18 31 49.37 r 089
2011-11-09 21:32:53 C 01 28 59.91 +18 33 39.8 u A81
2011-11-09 21:33:42 C 01 28 43.700 +18 31 45.42 r 089
2011-11-09 21:34:38 C 01 28 46.316 +18 31 41.57 r 089
2011-11-09 21:35:34 C 01 28 48.931 +18 31 37.61 r 089
2011-11-09 21:36:30 C 01 28 51.522 +18 31 33.59 r 089
2011-11-09 21:37:20 C 01 29 15.82 +18 32 11.9 u B39
2011-11-09 21:37:26 C 01 28 54.148 +18 31 29.82 r 089
2011-11-09 21:38:22 C 01 28 56.763 +18 31 25.75 r 089
2011-11-09 21:39:18 C 01 28 59.342 +18 31 22.19 r 089
2011-11-09 21:40:14 C 01 29 01.947 +18 31 18.04 r 089
2011-11-09 21:41:10 C 01 29 04.530 +18 31 14.22 r 089
2011-11-09 21:41:55 C 01 29 28.45 +18 31 54.3 u B39
2011-11-09 21:42:06 C 01 29 07.124 +18 31 10.31 r 089
2011-11-09 21:42:33 C 01 29 45.71 +18 32 24.6 w J38
2011-11-09 21:43:01 C 01 29 09.663 +18 31 06.57 r 089
2011-11-09 21:43:44 C 01 29 48.99 +18 32 20.5 w J38
2011-11-09 21:43:57 C 01 29 12.253 +18 31 02.46 r 089
2011-11-09 21:43:57 C 01 29 49.57 +18 32 19.7 w J38
2011-11-09 21:44:53 C 01 29 14.814 +18 30 58.73 r 089
2011-11-09 21:45:49 C 01 29 17.410 +18 30 54.80 r 089
2011-11-09 21:46:16 C 01 29 55.80 +18 32 11.6 w J38
2011-11-09 21:46:29 C 01 29 56.43 +18 32 10.8 w J38
2011-11-09 21:46:45 C 01 29 20.006 +18 30 50.74 r 089
2011-11-09 21:47:41 C 01 29 22.579 +18 30 46.88 r 089
2011-11-09 21:48:37 C 01 29 25.112 +18 30 43.09 r 089
2011-11-09 21:49:32 C 01 29 27.649 +18 30 38.92 r 089
2011-11-09 21:50:28 C 01 29 30.198 +18 30 35.09 r 089
2011-11-09 21:51:24 C 01 29 32.774 +18 30 31.16 r 089
2011-11-09 21:52:20 C 01 29 35.336 +18 30 27.32 r 089
2011-11-09 21:53:16 C 01 29 37.898 +18 30 23.70 r 089
2011-11-09 21:53:43 C 01 30 00.56 +18 31 06.9 t 204
2011-11-09 21:54:37 C 01 30 18.25 +18 31 41.9 w J38
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)