Open Star Cluster NGC 6819 in Cygnus

A 3 minute exposure with an ST-9E CCD camera thru Kopernik's 20-inch F/8.1 Ritchey Chretien Cassegrain telescope. The field of view is about 8x8 arc minutes, with North at the top.

Dreyer's description of NGC 6819 in his New General Catalog (NGC):

"Cluster, very large, very rich in stars, stars of magnitude 11 to 15."

Quote from: The Deep Sky Field Guide to Uranometria 2000:

"Moderately rich in stars; small brightness range; strong central concentration; detached. Diameter 9.5 arc minutes."

This Open Star Cluster in the constellation of Cygnus has about 150 member stars, and is sometimes called the "Fox Head Cluster".

• NGC 6819
• Magnitude: 7.3
• Constellation: Cygnus
• RA: 19h 41m 18.0s
• Dec: +40° 11' 00" Epoch 2000
• Size (mins): 5.0'
• Classification: Open Star Cluster.
  

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George Normandin, KAS

October 31st, 2002