Coathanger (Brocchi's Cluster)

The Coathanger (also known as Brocchi's Cluster), originally thought to be a gravitationally bound open cluster, is now known to be an asterism, a random grouping of stars such as the Big Dipper. A recent study based on data collected by the Hipparcos satellite showed that only six of the ten stars forming the "coathanger" are part of a true cluster. It is in the middle of the Milky Way and can be easily seen with binoculars.

Also appeared on “Starship Asterisk,” the main discussion venue for the Astronomy Picture of the Day (APOD)  September 14, 2014.

Technical Information       
Date:                        August, 2014
Location:                 Green Valley, Arizona
Telescope:              Takahashi FSQ-106EDX
Camera:                  SBIG STT-8300M
Filters:                     Astrodon Gen 2
Mount:                     AstroPhysics 1200
Exposure:               RGB = 60:60:60 minutes, all unbinned
Software:                Acquisition: Maxim DL 5, TheSkyX, Pinpoint, CCD Commander
                                 Processing: CCDStack, PhotoShop CS6 with various plugins