Close Approach of Asteroid (357439) 2004 BL86
Taken by Ernesto Guido, Nick Howes & Martino Nicolini on January 23, 2015 @ remotely from Siding Spring, Australia
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Asteroid (357439) 2004 BL86 has an estimated size of 420 m - 940 m (based on the object's absolute magnitude H=19.o) and it will have a close approach with Earth at about 3.1 LD (Lunar Distances = ~384,000 kilometers) or 0.0080 AU (1 AU = ~150 million kilometers) on 2015, January 26 at 16:20UT. This asteroid will reach the peak magnitude about +9.0 between Jan 26 & 27. A short animation showing the movement of (357439) 2004 BL86 (two consecutive 120-second exposure) is available here: http://tinyurl.com/q7s7he3 - The asteroid is trailed in the image due to its fast speed.
Photographer's website:
http://remanzacco.blogspot.it/2015/01/close-approach-of-asteroid-357439-2004.html
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