Asteroid 2014 JO25 during its closest approach of 4 lunar distances. Moving quickly through the star fields of Coma Berenices, it was hard keeping it centered. Half a mile in diameter, zooming by earth at 75,600 mph. I only managed a few frames due to clouds.
Scope: 300mm Astrotech Ritchey Cretien
QHY9M 2x60'' sec exp. unguided, sidereal tracking.
RA rate offset:: -0.8''/sidereal second
Dec rate offset:: -1.83''/sidereal second #astro