SH2-142 and NGC 7380

NGC 7380
All Images Copyright Steve Cannistra

Please click here for a medium image (60%)
Please click here for a larger image (70%)

RA (J2000): 22h 47m 14s
Dec (J2000): 58 degrees 01' 55"
Position Angle (Pinpoint):  plus 54 degrees


This image represents a total Ha exposure of 6.7 hours taken over two consecutive nights during a near full moon
and particularly "good" seeing for my site (FWHM around 2.5").  SH2-142 is an emission nebula ionized to radiate Ha light by the eclipsing binary DH Cephei (HD 215835).  It is a beautiful nebula filled with a variety of shapes, including arcs, globules, and dark dust regions.  NGC 7380 is an open star cluster that is physically intertwined with this emission nebula, and is better appreciated in color renditions of this region.  NGC 7380 was originally discovered by Caroline Herschel in 1787.  A nice description of this object may be found here, and Rob Gendler's RGB mosaic of this region may be found here.  Feel free to check out the larger versions of this image in the links above.

Photographic Details:
Date:  September 5 and 6, 2009
VC200L at f6.4 on the Takahashi NJP Mount
Autoguider:  SBIG ST-402 with 60mm guidescope, focal length 227mm
Camera:  Apogee U32
Astronomik Ha (6 nm)
Exposures:  Ha (20 x 20').  Total exposure time 6.7 hours
Conditions:  Temperature 58-70 degrees F.
Calibrated, aligned, and Sigma Clip combined in Maxim, deconvolution in Maxim using Bob Vanderbei's Fat Tail Deconvolution script (3 iterations), followed by DDP in ImagesPlus (IP).  Further processing in Photoshop CS4 (16 bit format)

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