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NGC2506 (Melotte 80, Collinder 170)



Scope: Celestron EdgeHD 9.25 at f/7, Location: DAA Observatory, Shelter Valley, CA,  13 March 2019  Camera: ST8300M (Baader LRGB filters)

Exposure: Exposure:  16 x 5 min (1x1 bin) exposure with IR/UV Block filter, 8 x 2 min (2x2 bin) RGB exposures.

Processing: Data Collection -  Sequence Generator Pro (as FITs).  Exposure calibration, LRGB registration, and stacking (Median combine -  Winsorized Sigma Clipping) - PixInsight.  LRGB channel registration, equalization and gradient removal - PixInsight.  Curves, Levels, RGB combine, Luminance layering - PixInsight. TGVNR and Multiscale Median Transform NR - Pixinsight. Final finishing  - Photoshop.  RGB calibration - eXcalibrator. This image is a  RGB combine with Luminance layering.  Images processed at 3352 x 2532 resolution. Final Image size is approximately  3200 x 2400.

North is to the right in this image.  The Open Cluster in this image is NGC 2506. It is also known as Melotte 70 and Collinder 170. It is also  inthe Milky Way Star Cluster (MWSC) catalog - [KPS2012] MWSC 1406. This is an an old star cluster greater than 1.6 billion years old. It has a number of red stars and Red Giant Branch (RGB) stars, but it also has a number of member stars that appear to be younger spectral types despite its estimated age. Its distance is estimated at  a little less than 11,500 light years. These objects and some bright stars are identified in the annotated image..  This image replaces an earlier image that can be seen in the Archives here.   Horizontal FOV is approximately 38 arc minutes (0.71 arcsec/pix image scale on the full size image).

Image center is located approximately - Equatorial 2000: RA: 08h 00m 17s Dec: -1048'18"


All images and content remain the property of Jim Thommes - copyright 2003 - 2019

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