M48 - Open Star Cluster in Hydra
Copyright 2008 Hap Griffin
M48 is an open cluster of some 80 stars extending over an area 25 light years in diameter.
at a distance of 1500 light years.
February 2, 2008 Griffin/Hunter II Observatory Bethune, SC
Instrument: Canon 40D (modified IR filtering) Digital SLR through 10" Newtonian w/MPCC
Focal Ratio: f/ 4.7
Guiding: SBIG ST-401 through Orion ED80
Conditions: Cold and clear
Weather: 32 F
Exposure: 30 minutes total (30 x 1 minutes @ ISO 800)
Filters: Baader UV/IR block internal to camera
Processing: Focused and captured, RAW to TIFF conversion, flat frame calibration, Digital Development, resizing and JPEG conversion in ImagesPlus. Color correction in Photoshop CS2.