IC 1805 and surrounding nebulosity (Heart Nebula)
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. The young age of this open cluster is very apparent
during image processing, when the prominent blue color of the central
stars was obvious. This region is also known as the "Heart
Nebula," since it resembles a heart on a wider field view.
There is a great deal of interesting detail within this image that can
be best appreciated on the higher resolution view. Please click
here for more information about this object.
Date: August 25, 2004
Sky 90 at f4.5 with field flattener/focal reducer, on the G11 Losmandy
Autoguider: SBIG STV with
Ha filter (13 nm bandpass); Type II R, G, B filter set.
24 x 5' for Ha (120
minutes total, unbinned); 6 x 4' each for R, G, and B (24 minutes total
for each color), all unbinned.
Conditions: Temperature 52 degrees F (started at 70
degrees); above average
transparency; above average seeing; calm; moonlight during Ha imaging.
Post-processing: No darks,
flats, or bias frames used. Alignment done in ImagesPlus.
combined using RC Sigma Reject Plug-in for MaximDL. DDP was
performed in ImagesPlus
levels and curves adjustments in Photoshop CS (16 bit format). Ha
was combined with RGB using the technique of Luminance
note: Graphics on this website
may not be reproduced without author permission.
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