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
2011-11-16 01:54:33 C 02 29 37.309 +16 39 49.16 o C60
2011-11-16 01:57:42 C 02 29 37.432 +16 39 48.68 o C60
2011-11-16 02:00:51 C 02 29 37.552 +16 39 47.92 o C60
2011-11-16 02:03:59 C 02 29 37.661 +16 39 47.20 o C60
2011-11-16 02:07:09 C 02 29 37.815 +16 39 46.40 o C60
2011-11-16 02:10:18 C 02 29 37.927 +16 39 45.56 o C60
2011-11-16 02:13:27 C 02 29 38.075 +16 39 45.03 o C60
2011-11-16 02:16:36 C 02 29 38.185 +16 39 44.31 o C60
2011-11-16 02:19:45 C 02 29 38.330 +16 39 43.61 o C60
2011-11-16 02:22:54 C 02 29 38.451 +16 39 42.94 o C60
2011-11-16 02:26:03 C 02 29 38.584 +16 39 42.11 o C60
2011-11-16 02:29:12 C 02 29 38.725 +16 39 41.50 o C60
2011-11-16 02:32:21 C 02 29 38.860 +16 39 40.66 o C60
2011-11-16 02:35:31 C 02 29 38.989 +16 39 40.02 o C60
2011-11-16 02:38:40 C 02 29 39.143 +16 39 39.10 o C60
2011-11-16 04:28:01 C 02 29 54.68 +16 40 16.6 u G47
2011-11-16 06:11:43 C 02 29 57.22 +16 40 13.3 r G96
2011-11-16 06:21:06 C 02 29 56.65 +16 40 05.0 u G47
2011-11-16 06:21:46 C 02 29 57.37 +16 40 12.1 r G96
2011-11-16 06:25:56 C 02 29 51.64 +16 42 32.9 o 807
2011-11-16 06:30:22 C 02 29 51.76 +16 42 31.6 o 807
2011-11-16 06:31:50 C 02 29 57.55 +16 40 10.8 r G96
2011-11-16 06:32:28 C 02 29 58.80 +16 40 06.3 G69
2011-11-16 06:34:36 C 02 29 51.86 +16 42 30.6 o 807
2011-11-16 06:41:49 C 02 29 57.69 +16 40 09.4 r G96
2011-11-16 06:41:55 C 02 29 52.05 +16 42 28.9 o 807
2011-11-16 06:50:21 C 02 29 59.08 +16 40 04.2 G69
2011-11-16 07:08:55 C 02 29 59.36 +16 40 01.8 G69
2011-11-16 12:25:20 C 02 30 19.44 +16 39 22.3 u 379
2011-11-16 12:28:01 C 02 30 19.50 +16 39 22.1 u 379
2011-11-16 12:49:14 C 02 30 19.82 +16 39 20.9 u 379
2011-11-16 12:51:53 C 02 30 19.86 +16 39 20.4 u 379
2011-11-16 12:54:33 C 02 30 19.93 +16 39 19.9 u 379
2011-11-16 13:04:34 C 02 30 20.08 +16 39 19.1 u 379
2011-11-16 13:07:14 C 02 30 20.12 +16 39 18.7 u 379
2011-11-16 13:50:33 C 02 30 20.70 +16 39 15.0 u 379
2011-11-16 13:58:54 C 02 30 20.84 +16 39 13.9 u 379
2011-11-16 14:04:14 C 02 30 20.90 +16 39 13.1 u 379
2011-11-16 14:27:43 C 02 30 24.47 +16 41 42.2 r D20
2011-11-16 14:28:58 C 02 30 24.48 +16 41 42.0 r D20
2011-11-16 14:43:53 C 02 30 24.67 +16 41 40.4 r D20
2011-11-16 14:45:08 C 02 30 24.68 +16 41 40.3 r D20
2011-11-16 14:58:45 C 02 30 24.86 +16 41 38.7 r D20
2011-11-16 15:00:00 C 02 30 24.87 +16 41 38.7 r D20
2011-11-16 18:12:57 C 02 30 39.56 +16 37 56.5 u 510
2011-11-16 18:19:16 C 02 30 39.79 +16 37 56.8 u 510
2011-11-16 18:25:36 C 02 30 39.99 +16 37 56.7 u 510
2011-11-16 18:31:55 C 02 30 40.20 +16 37 56.6 u 510
2011-11-16 18:38:14 C 02 30 40.41 +16 37 56.5 u 510
2011-11-16 18:44:33 C 02 30 40.61 +16 37 56.5 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)