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
2011-11-11 01:12:13 C 02 07 39.96 +17 30 07.1 u H45
2011-11-11 01:13:11 C 02 06 59.34 +17 29 30.2 u 958
2011-11-11 01:13:34 C 02 06 59.60 +17 29 29.6 u 958
2011-11-11 01:14:50 C 02 07 41.38 +17 30 05.1 u H45
2011-11-11 01:16:58 C 02 07 42.54 +17 30 03.5 u H45
2011-11-11 01:20:16 C 02 07 44.34 +17 30 00.5 u H45
2011-11-11 01:20:30 C 02 07 03.24 +17 29 18.9 u 958
2011-11-11 01:22:14 C 02 07 04.21 +17 29 15.8 u 958
2011-11-11 01:24:10 C 02 07 05.21 +17 29 13.0 u 958
2011-11-11 01:26:17 C 02 07 06.31 +17 29 09.4 u 958
2011-11-11 01:28:01 C 02 07 07.31 +17 29 07.1 u 958
2011-11-11 01:32:02 C 02 07 09.38 +17 29 01.0 u 958
2011-11-11 01:37:36 C 02 07 12.48 +17 28 51.5 u 958
2011-11-11 01:39:19 C 02 07 13.41 +17 28 48.7 u 958
2011-11-11 03:43:46 C 02 08 51.96 +17 27 18.7 o H21
2011-11-11 03:45:43 C 02 08 52.84 +17 27 16.6 o H21
2011-11-11 03:50:30 C 02 08 54.99 +17 27 11.3 o H21
2011-11-11 03:52:01 C 02 08 55.67 +17 27 09.6 o H21
2011-11-11 03:54:52 C 02 08 56.95 +17 27 06.6 o H21
2011-11-11 03:56:09 C 02 08 57.52 +17 27 05.1 o H21
2011-11-11 03:57:36 C 02 08 58.18 +17 27 03.6 o H21
2011-11-11 03:58:53 C 02 08 58.75 +17 27 02.2 o H21
2011-11-11 04:00:32 C 02 08 59.49 +17 27 00.5 o H21
2011-11-11 05:02:55 C 02 09 26.69 +17 25 49.7 r H21
2011-11-11 05:06:10 C 02 09 28.07 +17 25 45.9 r H21
2011-11-11 05:08:29 C 02 09 29.06 +17 25 43.2 r H21
2011-11-11 05:13:08 C 02 09 31.05 +17 25 37.6 r H21
2011-11-11 05:16:18 C 02 09 32.40 +17 25 33.9 r H21
2011-11-11 05:20:01 C 02 09 33.97 +17 25 29.3 r H21
2011-11-11 05:21:49 C 02 09 34.75 +17 25 27.2 r H21
2011-11-11 14:32:32 C 02 13 56.45 +17 24 22.7 r D20
2011-11-11 14:33:44 C 02 13 56.84 +17 24 21.5 r D20
2011-11-11 14:53:38 C 02 14 02.42 +17 24 03.2 r D20
2011-11-11 14:54:49 C 02 14 02.75 +17 24 02.4 r D20
2011-11-11 15:13:29 C 02 14 07.95 +17 23 44.4 r D20
2011-11-11 15:14:42 C 02 14 08.29 +17 23 43.2 r D20
2011-11-11 15:46:20 C 02 14 16.98 +17 23 11.9 r D20
2011-11-11 15:47:32 C 02 14 17.33 +17 23 10.6 r D20
2011-11-11 18:01:20 C 02 15 29.71 +17 12 11.1 u 958
2011-11-11 18:07:20 C 02 15 31.68 +17 12 08.2 u 958
2011-11-11 18:13:40 C 02 15 33.70 +17 12 06.3 u 958
2011-11-11 18:20:00 C 02 15 35.68 +17 12 03.5 u 958
2011-11-11 18:32:41 C 02 15 39.64 +17 11 58.5 u 958
2011-11-11 18:40:47 C 02 15 42.15 +17 11 55.3 u 958
2011-11-11 18:47:07 C 02 15 44.05 +17 11 52.9 u 958
2011-11-11 18:53:28 C 02 15 45.94 +17 11 50.2 u 958
2011-11-11 18:59:48 C 02 15 47.84 +17 11 47.4 u 958
2011-11-11 19:06:08 C 02 15 49.70 +17 11 44.4 u 958
2011-11-11 19:12:27 C 02 15 51.53 +17 11 42.7 u 958
2011-11-11 19:18:47 C 02 15 53.41 +17 11 38.5 u 958
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)