17P/Holmes 2007-Oct-28 Jim Melka

Image was captured with a Canon 20d DSLR on a clock-driven EQ1 Orion equatorial mount from Chesterfield, MO. Sky transparency rated 5 of 6. Altitude of the comet in Perseus about 35 degrees. Forty 30sec frames obtained at f/5.6 at a speed of 400 were combined with Images Plus 2.80 to produce a 20-minute exposure. Note the distinct green color of the outer coma of the comet that has been typical of recent comets. Good seeing. Jim Melka