Nyílthalmazok halmaza
Cluster of open clusters


Nagyobb méret a képre kattintva/Click image to enlarge

A hét csillagászati képe - 2011/08. hét

12 nyílthalmaz/12 open clusters

As I saw on February 18, 2011 the impressive poster of the Planetary Nebula Project on the APOD site, I thought that I would make my poster
about a cluster of open clusters which I have observed since 2009. I chose nine of them.
All images show 44.25 x 35.4 arc minutes area and were taken with my 8 inch Newtonian reflector and Canon EOS 400D camera.
In general the exposure times were 20-40 x 1 minutes, frames were processed by IRIS.
The alignment of the clusters is by apparent size. The smallest is NGC 6819 in Cygnus with 5 arc minutes and the largest of this collection is
NGC 6633 in Ophiuchus with 27 arc minutes.
And why are these clusters interesting at all? Just because of the beauty of them. The scenery of shiny colorful stars. I like them.