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IC2177 "Seagull" in Monoceros



H-ALPHA IMAGE (1800x1320)

Scope: Megrez II at f/5.8,  Location: Blair Valley, Anza Borrego Desert, CA   4 February 2011, Camera: ST8300M

Exposure: 9 x 10 minutes H-Alpha (2x2 bin),  7 x 4 minutes RGB Exposures (3x3) 

Processing: Images were captured with CCDSoft. Aligned/stacked and dark subtracted in Astroart ; Sigma Combine method was used for stacking subs.  All channels were scaled and rough color balanced in Astroart.  Central Gradient removal  was done in Astroart. Channels were co-registered in Astroart.   The 10 minute 2x2 bin H-Alpha  exposures  were combined  for the main luminance construction with some blending of the RGB composite (for blue / reflection signal). Level adjustments and curves were used to bring out object features.  LRGB combine was done in Photoshop.   A light background noise reduction was applied in PixInsight LE (SGBNR).   Selective sharpening was performed. Final touches and color balance in Photoshop. Final Image size is approximately 1676x1266 (resized to 1800x1320).

All exposures in this image were guided; North is to the Left in this image. This is an extended cloud of gas and dust popularly known as the "Seagull Nebula". The Seagull is a composite of several objects. In this image, open clusters NGC 2335 and NGC 2343 can be seen at the lower "left wing". A close up of the head area is in another image here.  This image replaces an earlier image that can be seen in the Archives here.  The Horizontal FOV is 100'.

Image center is located approximately - Equatorial 2000: RA: 07h 05m 50s Dec: -1046'21"


All images and content remain the property of Jim Thommes - copyright 2003 - 2012

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