M15 in Pegasus
CLICK ON IMAGE FOR FULL SIZE VIEW (2800x2100)
Scope: Explore Scientific MN152 Maksutov Newtonian at f/4.8, Location: Laguna Mountains, CA 5 September 2015 Camera: ST 8300M
Exposure: Exposure: 16 x 8 min, 10 x 5 min, 12 x 1.5 min, 12 x 24 sec (all 1x1 bin) exposure with UV/IR block, 8 x 4 min (2x2 bin) RGB exposures.
Processing: Data Collection - Sequence Generator Pro (as FITs). Calibrated, stacked (Kappa Sigma Combine) Deep Sky Stacker, LRGB channel registration, equalization, and central gradient removal - Astroart. Curves, Levels, RGB combine Images Plus. Luminance layering and finishing - Photoshop. This image is a Ha LRGB combine with Luminance layering. The Luminance construction was a blend of the different Luminance exposure times. Color saturation in LAB color; Final Image size is approximately 2800x2100.
North is up in this image. Lower left in this image is the globular cluster M15. The exposures for this image are somewhat long for a globular cluster in an attempt to capture the nebulosity to the west (right) of M15 - it is barely detectable in this image. Also in this image are a number of background galaxies - the brightest of which is NGC 7068 on the right edge of the image These objects and some of the brighter stars are identified in the annotated image. M15 is approximately 33,600 light years distant from Earth. This image replaces an earlier image that can be seen in the Archives here. Horizontal FOV is 85'
Image center is approximately - Equatorial 2000: RA: 21h 28m 43.s Dec: +12°19'07"
All images and content remain the property of Jim Thommes - copyright 2003 - 2015 copyright 2003 - 2012
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