NGC 4725
Spiral Galaxy in Coma Berenices

APOD - June 6, 2009

RA: 12h 50m Dec: +25 30' Mag: 10.10 Size (ly):54,000 Distance (ly):40 million

Click image for a larger view

  NGC 4725 is a bared spiral galaxy with a single arm located in Coma Berenices. The Hubble classification is SBa due to the galaxy's bright core and tight spiral structure. The spiral arm is separated from the central nucleus by a bar structure. Within the arm made up of dust and gas are bright blue star clusters with many containing areas of HII regions where stars are forming. These are seen more where the arm seems to connect to the bar. NGC 4725 is a Type II Seyfert galaxy and the gravitational interactions with the core are believed to be from the companion galaxy NGC 4258 (not shown).

Location & Date Backyard, Abbott Observatory - May 19,20,21, 2009
Temperature - Low 50's F
Telescope Deep Sky Instruments RC10C , F/7.3 on a Losmandy G11 Gemini, Prime Focus, Image scale 0.82 arcsec/pixel
Camera SBIG ST-2000XM w/CFW8, AO8
Astrodon Tru Balance LRGB Filters
CCD temp -15C
Exposure Times (L) 25 X 10, (R) 14x10, (G) 10x10,(B) 17x10 Minutes, Bin 1x1
Other Information Image acquisition/focus/guiding/dither - CCD Autopilot4 w/CCDSoft/TheSky6/PinPoint
Image Processing * CCD Stack- Calibration, Normalize, Alignment, Mean Combine, Deconvolution, Mild DDP
* Adobe CS4 - L+RGB combine, Levels, Curves, Sharpening, Cropping, NR, JPEG conversion

© 2009 Michael A. Siniscalchi