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M38 and NGC 1907 in Auriga



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: +3529'33"


All images and content remain the property of Jim Thommes - copyright 2003 - 2015 copyright 2003 - 2012

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