deep-sky
star cluster (open)
M103
M103 (also known as NGC 581) is a relatively small open star cluster in the constellation Cassiopeia.
The bright star at the right of the image is Delta Cassiopeia.
It lies at a distance of about (estimated) 9500 light years and is one of the most distant open clusters.
The age of this cluster is about 25 million years.
Other / older versions :
Image information:
Object info
Name: M103
Type: Star cluster (open)
Constellation: Cassiopeia
Distance: 9500 ly
Date & location
Date: September 30, 2011
Location: Landgraaf, The Netherlands
Equipment & optics
Total integration: 1h
Camera: SBIG ST-8300M
Optics: TMB/LOMO 80/480
Mount: Losmandy G-11 Gemini
Image comments
Quite humid conditions.
