Near-Earth asteroid 2015 HD10 close to its minimum distance: an image (28 Apr. 2015)
These very minutes, the near-Earth asteroid 2015 HD10 is safely brushing our planet from a distance of 600.000 km, 1.6 times the average distance of the Moon.
This 15-large minor planet was discovered on 21 April from Cerro Tololo Observatory in Chile. At that time it was quite faint (mag. 22.5-22.0).
The image above is a single 120-seconds exposures, remotely taken with the PlaneWave 17 + Paramount ME + SBIG STL-6303E robotic unit part of the Virtual Telescope. The robotic mount tracked the fast 190″/minute apparent motion of the asteroid, so stars are trailing, while the asteroid is perfectly tracked and visible as a sharp dot of light at the center of the image. At the imaging time it was at 700.000 km from the Earth
At the imaging time, this ~20 meters large rock was at about 1.1 millions of km from the Earth and getting closer for its safe fly-by.
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