Double Cluster in Perseus
CLICK ON IMAGE FOR FULL SIZE VIEW (3000x2050)
Scope: Explore Scientific MN152 Maksutov Newtonian at f/4.8, Location: DAA Observatory, Shelter Valley, CA, 7 October 2020 Camera: ASI294MM (Baader LRGB filters)
Exposure: 25 x 1.5 min (1x1 bin) exposure with UV/IR block, 27 x 1.5 min (1x1 bin) RGB exposures.
Processing: Data Collection - Sequence Generator Pro (as FITs). Sub frame calibration - Pixinsight. Sub frame registration and integration (Average combine - Winsorized Sigma Clipping) - PixInsight. Non-linear stretching, normalization and gradient removal - PixInsight. Curves, Levels, RGB combine, Luminance layering - PixInsight. Final finishing - Photoshop. RGB calibration - eXcalibrator. This image is a RGB combine with Luminance layering. Images processed at 4144 x 2822 resolution. Final Image size is approximately 3000x2050.
North is up in this image. Two open clusters dominate this image. The catalog references for these clusters are NGC 884 (left) and NGC 869 (right). However, together they are more commonly known as the Double Cluster in Perseus. The clusters are in association with each other at only a few hundred light years apart. These clusters are about 7,000 light years from Earth This image replaces an earlier image that can be seen in the archives here. Horizontal FOV is 90'. Full size image scale is 1.8 arcsec/pix.
Image center is approximately - Equatorial 2000: RA: 02h 20m 47s Dec: +57°09'21"
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