Time Travel Research Center © 2005 Cetin BAL - GSM: +90 05366063183 - Turkey / Denizli
IC 1805 and surrounding nebulosity (Heart Nebula)
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. 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.
Photographic Details:
Date: August 25, 2004
Scope: Takahashi Sky 90 at f4.5 with field flattener/focal reducer, on the
G11 Losmandy Mount.
Autoguider: SBIG STV with e-finder.
Camera: SXV-H9
Filter: Astronomik Ha filter (13 nm bandpass); Type II R, G, B filter set.
Exposures: Ha:(HaR:G:B). 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. Sigma combined using RC Sigma Reject Plug-in for MaximDL. DDP
was performed in ImagesPlus (IP). Subsequent levels and curves adjustments
in Photoshop CS (16 bit format). Ha was combined with RGB using the
technique of Luminance Corrected RGB.