NGC 7419 and Sharpless 154 in Cepheus
CLICK ON IMAGE FOR FULL SIZE VIEW (2600x1950)
Scope: Explore Scientific MN152 Maksutov Newtonian at f/4.8, Location: Tierra Del Sol - SDAA Club Site, CA, 26 August 2017 Camera: ST8300M (Baader Ha LRGB filters)
Exposure: 14 x 8 min (1x1 bin) exposure with UV/IR block, 12 x 8 min (2x2 bin) Ha exposure, 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 gradient removal - Astroart. Curves, Levels, RGB combine - ImagesPlus. Luminance Layering, final stretch, and finishing - Photoshop. RGB calibration - eXcalibrator. This image is a RGB combine with Luminance layering. Color saturation in LAB color. The H-Alpha filter exposure was screen blended into the IR/UV Blocking filter exposure stack and used for the luminance layer. Images processed at 3352 x 2532 resolution. Final Image size is approximately 2600 x 1950.
North is up in this image. NGC 7419 is the star cluster in the lower left. Sharpless 154 is the red emission region in the upper right. The color of the emission nebula (Sharpless 154) is typical of such objects where hydrogen gas is energized by nearby stars causing the gas to glow. The star cluster (NGC 7419) is characterized in WEBDA as a young cluster of about 19 million years of age; but it has a 1.83 reddening factor. We se it somewhat reddened due to intervening galactic dust. NGC 7419 is about 4,500 light years distant from Earth. There are also several dark nebulae in this field catalogued int the TGU and Dobashi catalogs. These objects as well as a few of the bright stars can be seen in the annotated image. This image replaces and earlier image that can be seen in the Archives here. Horizontal FOV is 88'
Image center is approximately - Equatorial 2000: RA: 22h 51m 57s Dec: +61°04'47"
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