This is the famous Great Globular Cluster in Hercules, number 13 on
Messier's list. It is faintly visible to the naked eye from a dark location such
as Cherry Springs. It is one of the best globulars in the northern hemisphere,
and is thought to contain about half a million stars.
• Date: June 2, 2003
• Exposure: 15 + 15 minutes
• Telescope: LX200 10" @ f/10
• Guiding: SBIG STV
• Camera: Olympus OM-1
• Film: Kodak Supra 400 (non-starburst)
• Scanned: Hewlett Packard S20
• Processing:
Adjusted curves in Adobe Photoshop 6.
• Ambient conditions: 37° F, 80% R.H.
Back - Rho Ophiuchus Nebula Complex