Tuesday, July 08, 2008

Coathanger for binocular

Most of the things up in the night sky that have names - constellations, for example - bear little resemblance to their namesake. There are a few notable exceptions, however. One of my favorite binocular objects that really does look like its name is called the Coathanger. It's an open star cluster in the obscure constellation Vulpecula (the Fox) and it looks exactly like a common coathanger. Of course, the name "Coathanger" is not its real name. Officially, it is known as Collinder 399 or sometimes Borccchi's cluster for an astronomer who mapped it for the purpose of calibrating photometers, but most binocular astronomers just call it the Coathanger. Don't look for the coathanger with a telescope, though. You will need the wider field of view of an ordinary binocular to see it as a coathanger.
 
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