M38 and NGC 1907 in Auriga
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ON IMAGE FOR FULL SIZE VIEW (2800x2100) Scope:
FSQ-106N at f/5, Location: Blair Valley, Anza Borrego Desert, CA 11
November 2015
Camera: Atik 383L (Astronomik Ha LRGB filters) Exposure:
Exposure: 10 x 9 min (2x2 bin) exposure with H-Alpha filter, 16 x 6 min
(1x1 bin) exposure with IR/UV Block filter, 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 - 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; H-Alpha exposure
stack was screen blended into the IR/UV Blocking filter exposure stack for the
luminance layer. Final Image size is approximately 2800 x 2100. North is up in this image.
This field has two relatively well known open clusters - M38 (also known as NGC
1912) and NGC 1907. M38 is the larger cluster in the upper portion of the image. M38 age is estimated slightly younger
at 220 million years; its distance is estimated at 4,200 light years. NGC 1907
is older at an estimated age of 500 million years and 4,500 light years
distant from Earth. There are two lesser known clusters in the image one
known as Czernik 21 (above and to the right of M38) and one known as Kronberger
1 (on the lower edge). The bright red Hydrogen Alpha emission nebula an
the left is LBN 794. These objects
as well as some of the brighter stars are identified in the annotated
image. An earlier image of M38 can be seen in the Archives here.
Horizontal FOV is 116' Image
center is approximately - Equatorial 2000: RA: 05h 28m
09s Dec: +35°29'33"
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