... click image to view discuss) . Comet PANSTARRS 3/13/2013 . ... Single image 4 sec exposure ISO 1600; Acton, MA . Submitted by Paul Benni on 03/16/2013 08:48:06 . ... Single image 4 sec exposure ISO 1600. ... Earthshine on Moon 3/13/2013 . ... I needed to identify Pluto's movement to make a positive ID among the many stars, which was fun to do. 8" EdgeHD telescope, 0.62x reducer, and SBIG ST-8300C camera. 5 minute images. ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...