IC 1805 in Ha light
Characteristics:
Magnitude: 6.5 (open star cluster)
Size: about 60'
Distance: 6,150 light years
RA: 2h 32m 41s
Dec: 61 degrees 27' 25"
Description:
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.
Filter: 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.
Please
note: Graphics on this website may not be reproduced without
author permission.
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