Discovery[1] | |
---|---|
Discovered by | R. S. McMillan Steward Observatory Kitt Peak (691) |
Discovery date | 28 December 2005 |
Designations | |
(308635) 2005 YU55 | |
2005 YU55 | |
Orbital characteristics[2] | |
Epoch 13 January 2016 (JD 2457400.5) | |
Uncertainty parameter 0 | |
Observation arc | 2,183 days (5.98 yr) |
Aphelion | 1.65562913 AU (247.678593 Gm) (Q) |
Perihelion | 0.659003712 AU (98.5855521 Gm) (q) |
1.15731642 AU (173.132072 Gm) (a) | |
Eccentricity | 0.430576028 (e) |
1.25 Jyr (454.75 d) | |
175.227687° (M) | |
0° 47m 29.892s / day (n) | |
Inclination | 0.340553512° (i) |
35.9073158° (Ω) | |
273.628156° (ω) | |
Known satellites | none[3] |
Earth MOID | 0.000433476 AU (64,847.1 km) (0.17 LD)[2] |
Venus MOID | 0.0017 AU (0.66 LD)[4] |
Mars MOID | 0.03884 AU (15.11 LD)[4] |
Jupiter MOID | 3.60813 AU (539.769 Gm) |
TJupiter | 5.347 |
Physical characteristics | |
Dimensions | 360±40 m[5][6][7][8] |
0.2 km | |
18 h (0.75 d) | |
19.31±0.02 h[2][9] | |
0.042±0.008 | |
C-type[6][9][10] | |
21.9[2][9] | |
(308635) 2005 YU55, provisionally named 2005 YU55, is a potentially hazardous asteroid[2] 360±40 meters in diameter, as measured after its Earth flyby.[8] Previously it was estimated to be 310 meters[5] or about 400 m (1,300 feet) in diameter.[6][7] It was discovered on 28 December 2005 by Robert S. McMillan at Steward Observatory, Kitt Peak.[1] On 8 November 2011 it passed 0.85 lunar distances (324,900 kilometers; 201,900 miles)[11] from Earth.
MPEC2005-Y47
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