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
2010-04-10 07:51:27 C 13 21 14.24 -05 54 09.2 u H45
2010-04-10 07:53:02 C 13 21 13.89 -05 54 06.9 u H45
2010-04-10 07:54:04 C 13 21 13.67 -05 54 05.2 u H45
2010-04-10 07:57:19 C 13 21 12.96 -05 54 00.2 u H45
2010-04-10 08:16:05 C 13 21 10.23 -05 53 37.8 L 716
2010-04-10 08:59:53 C 13 21 00.62 -05 52 29.8 L 716
2010-04-10 09:52:22 C 13 20 49.19 -05 51 07.1 L 716
2010-04-10 22:49:39 C 13 18 16.94 -05 29 22.3 u J51
2010-04-10 23:01:53 C 13 18 12.03 -05 29 23.1 w I99
2010-04-10 23:02:43 C 13 18 13.69 -05 29 00.3 u J51
2010-04-10 23:09:26 C 13 18 10.15 -05 29 10.0 w I99
2010-04-10 23:15:50 C 13 18 10.42 -05 28 37.3 u J51
2010-04-10 23:17:00 C 13 18 08.27 -05 28 56.8 w I99
2010-04-10 23:19:04 C 13 18 06.07 -05 28 58.4 w B33
2010-04-10 23:28:56 C 13 18 03.62 -05 28 40.9 w B33
2010-04-10 23:38:47 C 13 18 01.18 -05 28 23.5 w B33
2010-04-11 03:35:34 C 13 17 13.79 -05 21 05.9 L 716
2010-04-11 03:38:04 C 13 17 11.63 -05 21 12.2 r 750
2010-04-11 03:50:17 C 13 17 08.52 -05 20 49.8 r 750
2010-04-11 04:05:31 C 13 17 06.28 -05 20 11.4 L 716
2010-04-11 04:32:46 C 13 16 59.37 -05 19 22.9 L 716
2010-04-11 04:56:28 C 13 16 53.27 -05 18 38.4 L 716
2010-04-11 05:28:33 C 13 16 45.13 -05 17 24.1 c 711
2010-04-11 05:33:20 C 13 16 43.88 -05 17 15.2 c 711
2010-04-11 05:38:09 C 13 16 42.61 -05 17 06.3 c 711
2010-04-11 05:48:08 C 13 16 40.84 -05 16 51.4 u H13
2010-04-11 05:53:02 C 13 16 39.51 -05 16 41.6 u H13
2010-04-11 05:57:56 C 13 16 38.21 -05 16 33.0 u H13
2010-04-11 06:03:41 C 13 16 36.70 -05 16 21.7 u H13
2010-04-11 07:06:39 C 13 16 17.29 -05 14 27.9 u H45
2010-04-11 07:08:16 C 13 16 16.85 -05 14 24.8 u H45
2010-04-11 07:10:12 C 13 16 16.33 -05 14 21.0 u H45
2010-04-11 07:11:40 C 13 16 15.94 -05 14 18.1 u H45
2010-04-11 07:13:40 C 13 16 15.40 -05 14 14.4 u H45
2010-04-11 07:15:25 C 13 16 14.92 -05 14 11.0 u H45
2010-04-11 07:17:15 C 13 16 14.45 -05 14 07.6 u H45
2010-04-11 21:12:19 C 13 12 47.86 -04 46 10.4 o J16
2010-04-11 21:17:35 C 13 12 46.33 -04 45 58.5 o J16
2010-04-11 21:22:50 C 13 12 44.83 -04 45 47.6 o J16
2010-04-11 22:13:40 C 13 12 29.66 -04 43 54.2 o J26
2010-04-11 23:02:18 C 13 12 15.08 -04 42 06.1 o J26
2010-04-12 00:03:33 C 13 11 56.34 -04 39 49.5 o J26
2010-04-12 06:37:22 C 13 09 59.75 -04 24 06.7 o H21
2010-04-12 06:38:58 C 13 09 59.78 -04 23 54.3 u H45
2010-04-12 06:40:19 C 13 09 59.33 -04 23 51.1 u H45
2010-04-12 06:40:23 C 13 09 58.74 -04 23 59.3 o H21
2010-04-12 06:42:26 C 13 09 58.63 -04 23 45.9 u H45
2010-04-12 06:44:13 C 13 09 58.02 -04 23 41.6 u H45
2010-04-12 06:44:51 C 13 09 57.25 -04 23 48.5 o H21
2010-04-12 06:45:19 C 13 09 57.64 -04 23 38.9 u H45
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)