Dumbbell Nebula, M 27
Date: 8/18/14
Description: The Dumbbell Nebula (also known as Apple Core Nebula, Messier 27, M 27, or NGC 6853) is a planetary nebula in the constellation Vulpecula, at a distance of about 1,360 light years. This object was the first planetary nebula to be discovered; by Charles Messier in 1764. At its brightness of visual magnitude 7.5 and its diameter of about 8 arcminutes, it is easily visible in binoculars, and a popular observing target in amateur telescopes. [Ref: WikiPedia]
Sky Conditions: Clear sky, medium - urban light pollution, FWHM: 2.5 - 3.0 arc sec/pixel
Imaging: Exposure: 40 minutes (RGB, 6 x 400sec/ea.) at 2x2 bin using RGB filters
Guiding: 5 sec at 2x2 bin using NOAG
Equipment:
SBIG STF8300M CCD (RGB filters)
AT12RC at F8
Starlight Focuser NOAG w/SBIG ST402 guide camera AP1200 Mount
SW: Maxim DL V5, FocusMax, AP ASCOM V2, SkyX, PixIsight - calibration with darks, flats, bias.