IC 1805 in Ha light

       IC 1805

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Copyright Steve Cannistra

Please click here or on image for a higher resolution vertical view.
Please click here for a horizontal view (small image).
Please click here for a horizontal view (larger image).
Please click here for the Ha/OIII bicolor version of this image.

Magnitude:  6.5 (open star cluster)
Size: about 60'
Distance: 6,150 light years
RA: 2h 32m 41s
Dec: 61 degrees 27' 25"

IC 1805 is a young star cluster surrounded by Ha emitting nebulosity, located in the constellation Cassiopeia.  This region is also known as the "Heart Nebula," since it resembles a heart on a wider field view.   I have chosen to portray this FOV in the vertical orientation, since the detailed dust lanes at the bottom of the image convey a sense of upward motion.  Please click here for more information about this object.

Photographic Details:

Date:  August 26, 2005 (Ha data).
Scope:  Takahashi FS102 at f8, on the G11 Losmandy Mount.
Autoguider:  SBIG STV with e-finder.
Camera:  Maxcam CM10.

Astrodon Ha filter (6 nm bandpass).
Exposures:  Ha filter, 24 x 10' each unbinned.  Total exposure: 4 hours.
Conditions:  Temperature 58-75 degrees F; above average transparency, below average seeing; calm; clear. 
Post-processing:  Dark frame calibrated, followed by alignment in Maxim.  Sigma combined using RC Sigma Reject MaximDL, followed by DDP in ImagesPlus (IP).  Further processing in Photoshop CS (16 bit format).  These data were combined with OIII data obtained on the following night, for a narrowband false color image shown here.
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