Blue Mountain Vista Observatory New RInggold PA
Messier 108 (M108, NGC 3556) is an edge-on spiral galaxy in Ursa Major situated near the
bright star Beta Ursa Majoris and close to the Owl Nebula, M97, only 48' away. It has a visual
magnitude 10. It was discovered by Pierre Méchain in 1781. It is about 45 million light years
away and is a member of the Ursa Major group, a rather loose collection of galaxies.
The nearly edge-on galaxy appears to have no bulge and no pronounced core at all. It is a
detail-rich mottled disk with heavy obscuration along the major axis, with a few H II regions
and young star clusters exposed against the chaotic background.
Date: Mar 13 2008
Location: New Ringgold PA
Optics: Meade LX200R 12 inch at f/10
Mount: Paramount ME
Camera: SBIG ST-8XME / CFW-8
Guiding: ST-8XME integral guiding chip controlled by Maxim CCD
Exposure: LRGB: Luminance: 13x10 minutes unbinned; RGB: 8 each binned 2x2 - 8 min for
R,G, and 9 min for B.
Processing: Image acquisition using CCD Autopilot. Initial processing was done using Maxim
DL with subsequent processing with Photoshop.