CLICK ON IMAGE FOR FULL SIZE VIEW
Scope: C8 f/6.7;
Location: Laguna Mountains, CA; 12 May, 2007; Camera: Artemis285
Exposure: 8 x 360 sec Luminance exposures with IR Block Filter (bin 1x1);
6 x 180 sec RGB (bin 2x2)
Processing: Images were captured in Artemis Capture (as FITs). Aligned/stacked
in Registax 4 and saved as FITS. Luminance and Color channels were numerically
scaled and color balanced in Astroart. Channels were co-registered
in Astroart. Central Gradient removal was performed on the L,R,G,B stacked
masters. The IR Block exposure was used as the luminance channel. Curves and
Levels applied in Photoshop to optimize object features. Final LRGB
combine was done in Photoshop using Luminance Layering (or LLRGB). . Selective sharpening with layer mask was applied to
galaxy features. Light noise reduction was performed using PixInsight
LE. Final touches were done in Photoshop. Final
Image size is approximately 1392x1044.
North is up in this image. NGC 4725 is a lovely spiral galaxy in the
constellation of Coma Berenices . It is about 41 million to 43 million
light years distant from Earth. Horizontal FOV is about 20'
Image Center approximately - Equatorial 2000: RA: 12h 50m 27s Dec: +25°30'00"