M57 (Ring Nebula in Lyra)

Date: May, July, 2007
Location: Elizabeth, CO. Mag 5.0 skies, elevation ~ 6500 ft
Telescope: 16" f/4.9 Newtonian, Pegasus Optics primary, luminance at f/9.8 using a 2" Lumicon barlow for 48 mins, 2x TeleVue PowerMate for 48 mins, color at prime focus
Mount: Mathis Instruments MI-500 w/ AP1200 computer control
Exposure Duration: 

Luminance = Total 96 mins, -15 deg C

Color = Total 60 mins, -15 deg C

Imager: Luminance = ST-10XME, color = ST2000XCM
Filtration, etc: For luminance, a 50 nm wide Ha filter used by stacking an SBIG research grade luminance filter in front of a Lumicon Ha #29 dark red glass filter. Lumicon barlow and 2x PowerMate used before ST-10, XCM shot at f/4.9
Guiding: AO-L guided
Seeing: ~2"
Comments: Luminance = Collected in Maxim, calibrated and median combined in sets of three. Each median deconvolved in CCDStack, 50 iterate PC. Deconvolved medians averaged in Maxim. Average DDP/sharped in CCDStack. Final HaRGB assembled in Corel's PhotoPaint 12 using LAB

Return to the Nebulae Images page or The Bell Observatory homepage or go to SEDS page (astronomical information on M57)