Messier 15 (M15, NGC 7078) is a magnitude 6.2 globular cluster in the constellation of
Pegasus located at 33,600 light years from us. It has an apparent size of 18 arc minutes.
Its actual diameter is around 175 light years. This prominent ball of stars, over 100,000
actually, is one of the most densely packed clusters in our Milky Way galaxy. M15 has a
large number (112) of variable stars, 8 pulsars, and the first planetary nebula discoved
in a globular cluster, Pease 1. It is one of the oldest known globulars, estimated to be
12.0 billion years old. It is bright for a deep space object, and at mag 6.2, can be
observed with binoculars and small telescopes as a fuzzy patch. A 6 inch scope will
resolve individual stars in the cluster.
Date: Oct 2013
Location: New Ringgold PA
Optics: Hyperion f/8 12.5 inch, FL 2540 mm
Mount: Paramount ME
Camera: Apogee Alta U8300, guiding by On Axis Guider (ONAG) with an ST402
Exposure: RGB: R:12x5 min, G:8x5 min, B:16x5 min, Total= 3 hours
Processing: Image acquisition using CCD Autopilot. Initial processing was done using
Maxim DL with subsequent processing with Photoshop.
Blue Mountain Vista Observatory New Ringgold PA