NGC 6946 in Cygnus



Scope: C8  f/6.9, Location: Dos Picos Park, Ramona, CA   8 July 2005  Camera: Artemis285

Exposure: 10 x 240 sec Luminance exposures with IR block, 6 x 90 sec RGB exposures.

Processing: Images were captured Artemis Capture (as FITs). Aligned/stacked in Registax 3 and saved as FITS. Luminance and Color channels were scaled and rough color balanced in Astroart.  Channels were co-registered in Astroart . Final LRGB combine was done in Photoshop using Luminance Layering (or LLRGB). Selective sharpening with layer mask was applied to galaxy dust lanes. Photoshop was also used to subtract background noise from the luminance channel. Color balancing and final touches were done in Photoshop. SGBNR was used to smooth remaining background noise on the luminance channel. Final Image size is approximately 1392x1040.

North is up in this image. The image was guided for all exposures. NGC 6946 is significantly obscured by dust of our own Milky Way galaxy. It is also had 8 supernovas in recorded history. The most recent is SN2004ET. It can be seen to the left of the galaxy (see arrowhead). This image replaces an earlier image that can be seen in the Archives here. The supernova is not seen in that image due to the earlier date of the exposure. Horizontal FOV is 22'

Image center is approximately - Equatorial 2000: RA: 20h 34m 52s Dec: +6009'12"



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