APOD - June 6, 2009
RA: 12h 50m Dec: +25º 30' Mag: 10.10 Size (ly):54,000 Distance (ly):40 million
APOD - June 6, 2009
RA: 12h 50m Dec: +25º 30' Mag: 10.10 Size (ly):54,000 Distance (ly):40 million
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 -15°C |
| 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 |
