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
2010-04-19 19:41:26 C 07 48 40.91 +27 17 21.9 u 143
2010-04-19 19:48:45 C 07 48 02.10 +27 18 32.5 u 143
2010-04-19 19:53:51 C 07 47 35.10 +27 19 21.4 u 143
2010-04-19 19:58:34 C 07 47 12.08 +27 19 28.0 u 510
2010-04-19 20:01:51 C 07 46 52.85 +27 20 36.5 u 143
2010-04-19 20:03:16 C 07 46 46.52 +27 21 46.3 w 213
2010-04-19 20:06:25 C 07 46 29.79 +27 22 15.3 w 213
2010-04-19 20:06:45 C 07 46 28.81 +27 20 45.4 u 510
2010-04-19 20:11:22 C 07 46 03.62 +27 23 01.1 w 213
2010-04-19 20:12:39 C 07 46 01.52 +27 21 52.7 u J95
2010-04-19 20:14:57 C 07 45 45.70 +27 22 01.5 u 510
2010-04-19 20:19:51 C 07 45 23.57 +27 22 59.6 u J95
2010-04-19 20:35:11 C 07 44 02.80 +27 25 19.8 u J95
2010-04-19 20:40:33 C 07 43 34.48 +27 26 08.2 u J95
2010-04-19 20:47:08 C 07 42 59.83 +27 27 06.5 u J95
2010-04-19 20:53:02 C 07 42 28.88 +27 27 58.7 u J95
2010-04-19 21:15:18 C 07 40 26.64 +27 31 26.5 c 587
2010-04-19 21:16:47 C 07 40 18.95 +27 31 38.8 c 587
2010-04-19 21:17:55 C 07 40 12.95 +27 31 48.2 c 587
2010-04-19 21:19:12 C 07 40 06.25 +27 31 58.6 c 587
2010-04-19 21:20:26 C 07 39 59.87 +27 32 08.6 c 587
2010-04-20 20:16:00 C 05 55 57.33 +28 02 36.2 u J95
2010-04-20 20:24:21 C 05 55 25.78 +28 01 55.7 u J95
2010-04-20 20:30:17 C 05 55 03.49 +28 01 26.7 u J95
2010-04-20 20:36:50 C 05 54 38.91 +28 00 53.9 u J95
2010-04-20 20:43:14 C 05 54 14.93 +28 00 22.9 u J95
2011-11-08 17:32:29 C 17 43 13.21 -03 52 54.5 u 510
2011-11-08 17:35:45 C 17 44 11.85 -03 47 49.6 u 510
2011-11-08 17:39:11 C 17 45 14.02 -03 42 26.9 u 510
2011-11-08 17:43:34 C 17 46 34.18 -03 35 29.2 u 510
2011-11-08 17:48:39 C 17 48 08.46 -03 27 16.6 u 510
2011-11-08 18:00:36 C 17 51 54.47 -03 07 36.7 u 510
2011-11-08 18:03:47 C 17 52 55.98 -03 02 14.5 u 510
2011-11-08 18:46:12 C 18 07 09.87 -01 44 52.0 17.7 o A44
2011-11-08 18:46:31 C 18 07 16.70 -01 44 14.6 17.6 o A44
2011-11-08 18:46:50 C 18 07 23.33 -01 43 39.1 18.3 o A44
2011-11-08 18:47:13 C 18 07 31.86 -01 42 58.1 18.1 o A44
2011-11-08 18:51:08 C 18 08 56.40 -01 35 31.5 18.0 o A44
2011-11-08 18:51:27 C 18 09 03.22 -01 34 53.5 17.6 o A44
2011-11-08 18:51:46 C 18 09 10.29 -01 34 15.5 17.9 o A44
2011-11-08 18:57:27 C 18 11 14.65 -01 23 23.2 16.8 o A44
2011-11-08 18:57:46 C 18 11 21.64 -01 22 45.9 17.2 o A44
2011-11-08 18:58:05 C 18 11 29.04 -01 21 59.8 16.8 o A44
2011-11-08 18:58:25 C 18 11 36.18 -01 21 34.4 17.0 o A44
2011-11-08 18:58:44 C 18 11 43.22 -01 20 52.5 16.8 o A44
2011-11-08 18:59:03 C 18 11 50.48 -01 20 09.3 16.8 o A44
2011-11-08 23:57:16 C 20 40 00.61 +10 52 40.7 u I15
2011-11-08 23:58:21 C 20 40 36.81 +10 55 15.4 u I15
2011-11-08 23:59:28 C 20 41 14.67 +10 57 57.1 u I15
2011-11-09 01:05:30 C 21 19 39.73 +13 27 05.6 12.0 u H05
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)