Messier 12 (M12, NGC 6218) is a magnitude 6.7 globular cluster in the constellation
of Ophiuchus, and is located at a distance of about 16,000 light years. It has a
apparent size of 16 arc minutes.
Date: June 2008
Location: New Ringgold PA
Optics: Meade LX200R 12 inch at f/5.9
Mount: Paramount ME
Camera: SBIG ST-8XME / CFW-8
Guiding: ST-8XME integral guiding chip controlled by Maxim CCD
Exposure: LRGB unbinned: Luminance: 13x5 min, R:8x5 min, G:8x3.3 min, B:
8x6min for a total of 3 hrs.
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