Thursday 10 July 2014

The Coathanger asterism

Brocchi's cluster (known as the coathanger)lies in the constellation of Vulpecula and is not actually a cluster but a random alignment of 10 stars. Easy to find with a pair of binoculars it lies about one third of the way along an imaginary line between Altair and Vega surrounded by the milky way. Its best viewed in July or August. This image was taken with my barndoor mount and 200mm lens. A very bright Moon was near by so I had to use 20 x 20 second exposures and 5 darks and 2 flats. I added the lines to show the coathanger but through binoculars these 10 stars easily outshine those nearby.

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