Around M11


Konstantinos Christodoulopoulos

Parnonas Mountain, Greece

Technical Details
Canon EF 200mm f/2.8L lens @ f/2.8
Skywatcher HEQ5 Synscan pro
Guiding Vixen ED81S, DMK21AU04, PHD guiding
Canon EOS 450D (piggy back)

Constellation Scutum
21 Jul, 2012
Parnonas Mountain, Greece
1×5 min ISO 800 (light frames), 3×5 min ISO 800 (dark frame)
Programs used
PHD guiding, ImagesPlus, Nebulosity, Adobe Photoshop

The 6th National Amateur Astronomers Gathering took place July 20–23 in Mount Parnon, Greece.
In one of the darkest observing sites in Europe at an altitude of 4,660 feet (1,420 meters), a record of 625 amateur astronomers had the chance to participate in what came to be the largest star party ever to take place in Greece.

About this image

Îœ11 is a small (13′) but extremely rich open cluster, bristling with the light of at least 680 suns; of these about 400 shine brighter than 14 th magnitude. The cluster measures about 20 light years in diameter and its core is very dense. Nicknamed the “Wild Duck Cluster†after the V-shaped outline (pointed east) that some of its brighter members make. M11 sits in a notch in the north edge of the Great Scutum Star Cloud, the brightest stellar island outside the galactic center in Sagittarius. Barnard called this region the gem of the Milky Way. If you have a very wide-field telescope you must take the time to sweep the Great Scutum Star Cloud, where there is an incredible diversity of bright and dark nebulosity (of various shades of gray). A striking slash of darkness (Barnard 318) lies immediately south of Îœ11. South of B318 lies an eerily dark pond (Barnard 112).