Hemisphere:  Northern  ·  Constellation: Cassiopeia (Cas)  ·  Contains:  NGC 436  ·  NGC 457  ·  The star φCas
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ET Cluster - 11/6/2010, 



    
        

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ET Cluster - 11/6/2010
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ET Cluster - 11/6/2010

Equipment

Imaging Telescopes Or Lenses
Stellarvue SV105
Imaging Cameras
QHYCCD QHY9M
Mounts
Takahashi EM-200 Temma2
Filters
Astronomik B Type IIc · Astronomik G Type IIc · Astronomik R Type IIc
Software
PixInsight · PHD guiding · Sequence Generator Pro · Nebulosity
Guiding Telescopes Or Lenses
Orion ST 80

Acquisition details

Dates:
Nov. 6, 2010
Frames:
Astronomik B Type IIc: 10x180" (30') -15°C bin 1x1
Astronomik G Type IIc: 10x180" (30') -15°C bin 1x1
Astronomik R Type IIc: 10x180" (30') -15°C bin 1x1
Integration:
1h 30'
Avg. Moon age:
0.32 days
Avg. Moon phase:
0.11%

Basic astrometry details

Astrometry.net job: 148549

RA center: 01h18m40s.8

DEC center: +58°1749

Pixel scale: 2.694 arcsec/pixel

Orientation: -90.596 degrees

Field radius: 0.847 degrees

Resolution: 620x388

Description

The ET Cluster (named for its resemblance to ET), is some 7900 light years distant in the constellation Cassiopeia. Open clusters are groups of "sibling" stars born from the same stellar nursery (hydrogen nebulae). The stars you see in this cluster are approximately 21 million years old. Some of the stars are of different colors because they vary in mass (despite their common age). There are about 150 stars in this cluster.

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ET Cluster - 11/6/2010, 



    
        

            AstroPoverty