IC 1805 in Ha and OIII light (Bicolor Technique)
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
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.
Date: August 26, 2005 (Ha data); August 27, 2005 (OIII data).
FS102 at f8, on the G11 Losmandy
Autoguider: SBIG STV with
Camera: Maxcam CM10.
Ha filter (6 nm bandpass); Astronomiks OIII filter (15 nm bandpass).
Exposures: Ha filter, 24 x 10'
OIII filter, 24 x 10' each unbinned. Total exposure: 8 hours.
Conditions: Temperature 58-75 degrees F; above average
transparency, below average seeing; calm; clear.
This is an Ha:(Ha:sG:OIII) composite created with
technique that I developed for processing Ha/OIII narrowband images
(i.e., without the SII component).
Please follow the link for a full description of the technique.
In the above image, the Ha was used as luminance, and the color was
provided by the Ha:sG:OIII composite.
note: Graphics on this website may not be reproduced without
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