K3's Astronomy - Deep Sky
"When I consider your heavens, the work of your fingers, the moon and the stars which You have set in place, what is Man that You are mindful of him?" -- Psalm 8:3,4
M39 - The Open cluster in Cygnus

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(1.57"/pixel).		 M39 - The Open cluster in Cygnus, 9.12.2001 (21:01 UT)
Resolution: 3.14 arcsec/pixel
Camera: Vesta 675SC at prime focus with 0.60FR
Telescope: 8" F6 Orion Europa Newtonian
Result focal ratio: F3.6
Exposure: combining 30x10s (gain 75%), 25xDF
Seeing: lim.magnitude for naked eye 4.0, temperature -4.5°C, turbulence

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Last Update: 6.12.2001