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
2011-12-16 19:36:00 C 02 49 39.19 +17 09 34.6 21.4 u C20
2011-12-16 19:41:06 C 02 49 39.33 +17 09 34.7 21.0 u C20
2011-12-16 19:46:12 C 02 49 39.49 +17 09 35.6 21.3 u C20
2011-12-16 19:51:18 C 02 49 39.64 +17 09 36.2 21.0 u C20
2011-12-16 19:56:25 C 02 49 39.74 +17 09 37.1 20.8 u C20
2011-12-16 20:01:32 C 02 49 39.90 +17 09 37.3 21.2 u C20
2011-12-16 20:06:38 C 02 49 40.04 +17 09 37.7 u C20
2016-11-02 08:24:24 S 08 49 44.74 +18 19 03.4 L C51
2016-11-02 09:58:39 S 08 49 02.84 +18 22 00.6 L C51
2016-11-02 13:07:20 S 08 47 39.02 +18 27 54.3 L C51
2016-11-05 10:52:52 C 08 16 31.68 +20 27 08.9 q G96
2016-11-05 11:00:00 C 08 16 28.42 +20 27 21.3 q G96
2016-11-05 11:06:11 C 08 16 25.42 +20 27 30.1 q G96
2016-11-05 11:12:21 C 08 16 22.57 +20 27 40.0 q G96
2016-11-10 10:20:50 C 07 23 50.13 +22 55 40.4 q 703
2016-11-10 10:38:10 C 07 23 42.18 +22 55 57.6 q 703
2016-11-10 10:46:52 C 07 23 38.24 +22 56 05.7 q 703
2016-12-03 20:55:52 C 04 37 12.72 +23 06 53.1 S C47
2016-12-03 21:01:26 C 04 37 11.79 +23 06 51.2 S C47
2016-12-03 21:06:45 C 04 37 10.90 +23 06 49.4 S C47
2016-12-03 21:13:39 C 04 37 09.73 +23 06 47.4 S C47
2016-12-03 21:19:30 C 04 37 08.74 +23 06 45.6 S C47
2016-12-04 02:49:10 C 04 36 17.46 +23 04 59.2 R G45
2016-12-04 02:50:26 C 04 36 17.25 +23 04 59.2 R G45
2016-12-04 02:56:07 C 04 36 16.31 +23 04 56.9 R G45
2016-12-04 03:11:18 C 04 36 13.84 +23 04 52.9 R G45
2016-12-04 03:16:59 C 04 36 12.92 +23 04 51.1 R G45
2016-12-04 03:23:53 C 04 36 11.77 +23 04 49.2 R G45
2016-12-04 03:24:54 C 04 36 11.63 +23 04 49.0 R G45
2016-12-08 08:53:39 C 04 22 01.16 +22 32 13.7 q G96
2016-12-08 09:01:43 C 04 22 00.13 +22 32 11.1 q G96
2016-12-08 09:07:53 C 04 21 59.34 +22 32 09.0 q G96
2016-12-08 09:14:04 C 04 21 58.58 +22 32 06.8 q G96
2016-12-24 08:59:36 C 03 54 41.637 +21 10 50.97 L F51
2016-12-24 09:19:08 C 03 54 40.898 +21 10 48.60 L F51
2016-12-24 09:38:41 C 03 54 40.164 +21 10 45.88 L F51
2016-12-25 03:54:41 C 03 54 07.85 +21 08 36.4 u H21
2016-12-25 04:02:58 C 03 54 07.58 +21 08 35.4 u H21
2016-12-25 04:11:44 C 03 54 07.28 +21 08 34.3 u H21
2021-11-07 11:11:40 C 08 03 34.54 +20 57 52.1 V G96
2021-11-07 11:19:05 C 08 03 33.38 +20 57 55.5 V G96
2021-11-07 11:26:29 C 08 03 32.26 +20 58 00.1 V G96
2021-11-07 11:33:52 C 08 03 31.14 +20 58 03.4 V G96
2021-11-28 00:56:19 C 06 36 43.86 +24 04 10.8 Z K19
2021-11-28 01:07:52 C 06 36 41.56 +24 04 12.8 Z K19
2021-11-28 01:19:18 C 06 36 39.13 +24 04 16.4 Z K19
2021-11-28 10:28:43 C 06 34 50.95 +24 06 06.9 V G96
2021-11-28 10:36:15 C 06 34 49.44 +24 06 08.1 V G96
2021-11-28 10:51:21 C 06 34 46.36 +24 06 10.8 V G96
2021-12-01 12:19:17 C 06 20 26.33 +24 17 04.3 V V00
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)