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2005 YU55
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2005 YU55
Goldstone radar image of asteroid 2005 YU55
taken November 7, 2011.
Discovered by
R. S. McMillan
Steward Observatory,
Kitt Peak (691)
Discovery date
December 28, 2005
MPC designation
2005 YU55
Minor planet
category
PHA
Apollo
Epoch 2010-Jul-23 (JD 2455400.5)
(Uncertainty=1)
Aphelion
1.6329 AU (Q)
Perihelion
0.65241 AU (q)
Semi-major axis
1.1427 AU (a)
Eccentricity
0.42905
Orbital period
1.22 yr
Mean anomaly
26.094° (M)
Inclination
0.51351°
Longitude of ascending node
39.304°
Argument of perihelion
268.79°
Dimensions
310-400 meters
Sidereal rotation
period
18 hr
Spectral type
C-type
Absolute magnitude (H)
21.1
2005 YU55, also written as 2005 YU55, is a potentially hazardous asteroid 310 meters or about 400 m (1,300 feet) in diameter. It was discovered on 28 December 2005 by Robert S. McMillan at Steward Observatory, Kitt Peak. On 8 November 2011 it passed 0.85 lunar distances (324,900 kilometers; 201,900 miles) from the Earth. This is the closest known approach by an asteroid with an absolute magnitude this bright since 2010 XC15 (H = 21.4) approached within 0.5 lunar distances in 1976.
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Created By:
System
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