IC 1805 - The Heart Nebula in Cassiopeia


Copyright 2007 Hap Griffin

IC 1805 is known as the "Heart Nebula" because of its resemblance to its namesake (although "upside down in this north = up presentation).  It is one of several giant star-forming regions of hydrogen clouds in the Perseus arm of our galaxy.  A very young (only 1.5 million years old) star cluster known as Melotte 15 lies 50 light years in front of the nebula and illuminates it.

IC 1805 lies at a distance of 7500 light years.



Date/Location:   September 8, 2007     Griffin/Hunter II Observatory    Bethune, SC
Instrument:    Canon 350D (modified IR filtering) Digital SLR through Orion ED80 Refractor on Astro-Physics AP-1200 mount 
Focal Ratio:   f4.5 via Meade .63 focal reducer
Guiding:    None
Conditions:    Visually clear
Weather:    70 F
Exposure: 216 minutes total (72 x 3 minutes @ ISO 800)
Filters:    Baader UV/IR block internal to camera
Processing:    Focused and captured with DSLRFocus.  RAW to TIFF conversion, auto-dark and flat frame calibration, Digital Development, resizing and JPEG conversion in ImagesPlus.  Color correction in Photoshop PS2.  Noise reduction in NeatImage.