Emission Nebula NGC6820
Date: 9/28/14
Description: NGC 6820 is an emission nebula that surrounds open cluster NGC 6823 in Vulpecula, near M27, the Dumbbell Nebula.The most striking feature is the trunk-like pillar of dust and gas protruding from the east side of the nebula towards the open cluster, NGC 6823 in the west. The center of the open cluster is about two million years old and is predominantly represented by many young, bright blue stars. Outer parts of the cluster intimately involving pillars of emission nebula NGC 6820, contain even younger stars. The huge pillars of gas and dust are probably formed when surrounding gas and dust is pushed and eroded away by radiation from nearby stars. [Ref: WikiPedia]
Sky Conditions: Clear sky, medium - urban light pollution (half moon)FWHM: 2.5 - 3.0 arc sec/pixel
Imaging: Exposure: 4x60 min (H-alpha, 9 x 400sec/ea.) at 2x2 bin using RGB+Ha filter
Guiding: 5 sec at 2x2 bin using NOAG
Equipment:
SBIG STF8300M CCD (RGB, Ha filters)
AT12RC at F8
Starlight Focuser NOAG w/SBIG ST402 guide camera AP1200 Mount
SW: Maxim DL V6, FocusMax, AP ASCOM V2, SkyX, PixIsight - calibration with darks, flats, bias.