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Contains:  NGC 663, NGC 659, NGC 654, M 103, NGC 581, The star 44Cas, The star χCas
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4 young open clusters with B-type stars. Each reddened by differing levels of interstellar dust., 





    
        

            hbastro
4 young open clusters with B-type stars. Each reddened by differing levels of interstellar dust.

4 young open clusters with B-type stars. Each reddened by differing levels of interstellar dust.

Technical card

Imaging telescope or lens:Home made OC2226

Imaging camera:SBIG STL-11000M

Mount:AstroPhysics AP1200

Guiding telescope or lens:Home made OC2226

Guiding camera:SBIG STL-11000M

Software:PixInsight PinInsight 1.8home written C++

Filter:Astrodon

Accessory:Technical Innovations Dome 6'

Resolution: 4008x2672

Dates:Sept. 15, 2015

Frames: 15x180"

Integration: 0.8 hours

Avg. Moon age: 1.98 days

Avg. Moon phase: 4.37%

Astrometry.net job: 1970214

RA center: 25.448 degrees

DEC center: 60.767 degrees

Pixel scale: 3.386 arcsec/pixel

Orientation: 93.735 degrees

Field radius: 2.266 degrees

Locations: Sierra Chaparral Observatory, Solar Powered, Off The Grid, Single Owner, Home Made, Tulare County, CA, United States

Data source: Own remote observatory

Description

4 young open clusters with B-type stars. Each reddened by differing levels of interstellar dust.

NGC 581 M103 It is one of the most distant open clusters known, with distances of 8,000 to 9,500 light-years from the earth~3kpc. With stars ranging about 15 light-years apart. There are about 40 member stars within M103 a couple of them are 10th magnitude red giants. M103 is about 25 million years old.

NGC 654.This is towrd the bottom left of this image. There is clear evidence for the presence of at least two layers of dust along the line of sight to the cluster. The reddening is clearly visible by eye when compairing this cluster to M103 in the upper center of this image. The distances to the two dust layers are estimated to be ∼200 pc and ∼1 kpc thus are located much closer to the Sun than the cluster (∼2.4 kpc). The foreground dust layer is found to have a ring morphology with the central hole coinciding with the centre of the cluster. This ring is again visible in the image above. The foreground dust grains are suggested to be mostly responsible for both the observed differential reddening of the cluster.

NGC 663 cluster distance of 2.1 kpc, age of 20Myr. A collection of B type stars with slight reddening from intersetllar dust and clearly less than NGC 654 to its left.

NGC 559 cluster is a distance of 1.1kpc this is the least prominant of the 4 clusters and on the lower right. It does however contain a number of variable stars recently discovered.

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hbastro
hbastro
License: None (All rights reserved)
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4 young open clusters with B-type stars. Each reddened by differing levels of interstellar dust., 





    
        

            hbastro