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
2010-04-17 03:17:48 C 11 42 41.94 +07 20 51.3 u H13
2010-04-17 03:20:36 C 11 42 36.74 +07 21 30.3 u H13
2010-04-17 04:13:07 C 11 40 49.46 +07 33 10.8 r H21
2010-04-17 04:17:21 C 11 40 41.42 +07 34 10.2 r H21
2010-04-17 04:21:27 C 11 40 33.63 +07 35 07.8 r H21
2010-04-17 04:25:05 C 11 40 26.70 +07 35 58.9 r H21
2010-04-17 08:20:15 C 11 32 48.78 +08 32 58.3 r 718
2010-04-17 08:30:20 C 11 32 27.97 +08 35 30.6 r 718
2010-04-17 08:40:24 C 11 32 07.41 +08 38 01.3 r 718
2010-04-17 11:57:41 C 11 25 37.95 +09 30 31.3 u 379
2010-04-17 11:58:26 C 11 25 36.26 +09 30 43.4 u 379
2010-04-17 11:59:33 C 11 25 33.76 +09 31 01.2 u 379
2010-04-17 12:00:38 C 11 25 31.33 +09 31 19.0 u 379
2010-04-17 12:22:37 C 11 24 41.60 +09 37 16.8 u 379
2010-04-17 12:24:38 C 11 24 37.08 +09 37 49.2 u 379
2010-04-17 12:24:55 C 11 24 36.40 +09 37 53.9 u 379
2010-04-17 12:25:47 C 11 24 34.42 +09 38 08.3 u 379
2010-04-17 12:26:21 C 11 24 33.17 +09 38 17.5 u 379
2010-04-17 12:27:12 C 11 24 31.23 +09 38 31.0 u 379
2010-04-17 12:27:29 C 11 24 30.58 +09 38 35.8 u 379
2010-04-17 12:28:03 C 11 24 29.28 +09 38 45.2 u 379
2010-04-17 12:43:56 C 11 23 53.00 +09 43 05.2 u 379
2010-04-17 12:46:09 C 11 23 48.00 +09 43 41.4 u 379
2010-04-17 12:47:37 C 11 23 44.63 +09 44 05.4 u 379
2010-04-17 12:49:05 C 11 23 41.26 +09 44 29.2 u 379
2010-04-17 19:23:18 C 11 08 12.691 +11 37 19.30 r 089
2010-04-17 19:24:24 C 11 08 09.783 +11 37 39.78 r 089
2010-04-17 19:46:47 C 11 07 16.81 +11 44 18.7 o 046
2010-04-17 19:49:03 C 11 07 10.79 +11 45 00.4 o 046
2010-04-17 19:50:33 C 11 07 06.80 +11 45 28.4 o 046
2010-04-17 19:51:14 C 11 07 05.00 +11 45 27.6 o 639
2010-04-17 19:51:18 C 11 07 04.80 +11 45 42.0 o 046
2010-04-17 19:52:00 C 11 07 02.99 +11 45 54.7 o 046
2010-04-17 19:52:41 C 11 07 01.12 +11 45 54.7 o 639
2010-04-17 19:53:26 C 11 06 59.14 +11 46 21.5 o 046
2010-04-17 19:55:13 C 11 06 54.43 +11 46 41.2 o 639
2010-04-17 19:56:43 C 11 06 50.42 +11 47 09.6 o 639
2010-04-17 19:58:18 C 11 06 46.23 +11 47 38.3 o 639
2010-04-17 20:00:03 C 11 06 41.62 +11 48 10.9 o 639
2010-04-17 20:43:55 C 11 04 49.00 +12 01 46.7 w J69
2010-04-17 20:46:16 C 11 04 42.59 +12 02 31.2 w J69
2010-04-17 20:48:38 C 11 04 36.18 +12 03 15.7 w J69
2010-04-17 20:50:59 C 11 04 29.79 +12 03 59.7 w J69
2010-04-17 20:53:20 C 11 04 23.43 +12 04 43.9 w J69
2010-04-17 21:21:16 C 11 02 55.825 +12 13 44.50 r 089
2010-04-17 21:22:22 C 11 02 52.782 +12 14 05.14 r 089
2010-04-17 21:23:29 C 11 02 49.772 +12 14 26.34 r 089
2010-04-17 22:03:53 C 11 01 06.51 +12 26 55.7 u 510
2010-04-17 22:13:35 C 11 00 39.46 +12 30 00.4 u 510
2010-04-17 22:23:18 C 11 00 12.34 +12 33 04.9 u 510
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)