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
2010-04-09 09:25:21 C 13 25 07.36 -06 25 21.1 u H45
2010-04-09 18:38:32 C 13 23 35.14 -06 11 01.7 r D96
2010-04-09 18:45:00 C 13 23 33.91 -06 10 53.0 r D96
2010-04-09 19:04:28 C 13 23 30.33 -06 10 25.2 r D96
2010-04-09 21:56:38 C 13 23 08.37 -06 08 54.2 r B09
2010-04-09 21:59:31 C 13 23 08.78 -06 08 42.4 c J08
2010-04-09 22:02:48 C 13 23 07.23 -06 08 48.2 v 204
2010-04-09 22:14:48 C 13 23 04.85 -06 08 31.5 v 204
2010-04-09 22:19:57 C 13 23 03.82 -06 08 24.2 v 204
2010-04-09 22:26:28 C 13 23 02.50 -06 08 15.2 c 587
2010-04-09 22:28:13 C 13 23 02.14 -06 08 12.6 c 587
2010-04-09 22:29:47 C 13 23 02.58 -06 08 02.2 c J08
2010-04-09 22:30:01 C 13 23 01.78 -06 08 10.2 c 587
2010-04-09 22:31:43 C 13 23 01.44 -06 08 07.3 u C13
2010-04-09 22:40:42 C 13 22 59.63 -06 07 54.6 u C13
2010-04-09 23:16:57 C 13 22 52.21 -06 07 01.3 r B09
2010-04-09 23:17:42 C 13 22 53.46 -06 06 59.6 w J59
2010-04-09 23:31:21 C 13 22 50.69 -06 06 40.7 w J59
2010-04-09 23:32:01 C 13 22 49.13 -06 06 39.9 r B09
2010-04-09 23:32:54 C 13 22 49.80 -06 06 35.4 w A06
2010-04-09 23:38:36 C 13 22 48.66 -06 06 27.9 w A06
2010-04-09 23:42:52 C 13 22 47.74 -06 06 21.7 w A06
2010-04-09 23:45:55 C 13 22 47.76 -06 06 19.8 w J59
2010-04-10 00:02:57 C 13 22 44.28 -06 05 55.6 w J59
2010-04-10 02:07:54 C 13 22 24.10 -06 00 26.3 c 844
2010-04-10 02:11:29 C 13 22 23.33 -06 00 21.8 c 844
2010-04-10 02:26:21 C 13 22 20.24 -05 59 59.6 c 844
2010-04-10 02:31:32 C 13 22 19.11 -05 59 51.9 c 844
2010-04-10 02:38:28 C 13 22 17.72 -05 59 42.1 c 844
2010-04-10 05:25:10 C 13 21 48.30 -05 57 46.8 v H13
2010-04-10 05:32:07 C 13 21 46.81 -05 57 36.1 v H13
2010-04-10 05:36:16 C 13 21 45.95 -05 57 30.1 v H13
2010-04-10 05:40:35 C 13 21 45.00 -05 57 23.6 v H13
2010-04-10 05:44:54 C 13 21 44.08 -05 57 17.6 v H13
2010-04-10 06:39:41 C 13 21 32.09 -05 56 07.6 r 718
2010-04-10 06:53:50 C 13 21 29.05 -05 55 46.3 r 718
2010-04-10 06:55:30 C 13 21 26.03 -05 55 41.7 r H21
2010-04-10 06:58:20 C 13 21 25.42 -05 55 37.5 r H21
2010-04-10 07:00:28 C 13 21 24.95 -05 55 34.3 r H21
2010-04-10 07:04:00 C 13 21 24.19 -05 55 28.8 r H21
2010-04-10 07:14:41 C 13 21 24.52 -05 55 14.8 r 718
2010-04-10 07:14:49 C 13 21 24.33 -05 55 01.4 r 703
2010-04-10 07:23:56 C 13 21 22.35 -05 54 47.4 r 703
2010-04-10 07:33:04 C 13 21 20.34 -05 54 33.5 r 703
2010-04-10 07:34:48 C 13 21 20.14 -05 54 44.0 r 718
2010-04-10 07:42:10 C 13 21 18.28 -05 54 19.4 r 703
2010-04-10 07:45:03 C 13 21 17.90 -05 54 28.3 r 718
2010-04-10 07:45:16 C 13 21 15.59 -05 54 18.9 u H45
2010-04-10 07:47:21 C 13 21 15.13 -05 54 15.7 u H45
2010-04-10 07:49:46 C 13 21 14.62 -05 54 11.8 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)