NGC 4625 - Spiral Galaxy in Coma
Berenices
Copyright 2010 Hap Griffin
Date/Location:
May 9, 2010 Griffin/Hunter
Observatory Bethune, SC
NGC 4725 is peculiar in that this spriral galaxy only has one main spiral arm
rather than the normal two. The outer gas and dust regions can also be
seen to have their own spiral structure. Many other distant galaxies can
be spotted in this image as well.
NGC 4725 lies at a distance of 41 million light-years and is over 100,000
light-years in diameter.
Camera: QSI 583wsg
Filters: Astrodon E Series Generation 2 LRGB
CCD Temperature: -10 C
Instrument: Planewave CDK 12.5"
Focal Ratio: f/8
Mount: AP-1200
Guiding: Auto via the QSI camera's built in Off-Axis Guider
mirror and an SBIG ST-402 Guider
Conditions: Clear and cool
Weather: 55 F, still
Exposure: 330 minutes total (15 x 10 min Luminance, 6 x 10 min each in RGB)
Capture: CCDAutopilot 4 w/ Maxim DL Camera Control, focused automatically w/
FocusMax
Processing: Frame calibrations, alignment and stacking with ImagesPlus v3.80.
Finishing in Photoshop CS4.