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Catalogue and alternative designations

IC 1276, Palomar 7 

Type Globular Cluster
Position 18 10 46.6, -07 12 32
Constellation Serpens
Camera and Telescope STXL6303E and 36.8 cm Ritchey Chretien 
Focal Ratio F9
Exposure Details A LRGB image with luminance = 120 minutes, red = 120 minutes, green = 100 minutes and blue = 110 minutes. Astrodon filters.
Description IC1276 is also known as Palomar 7. The Palomar globular clusters are a set of clusters discovered from the first Palomar sky survey. There are 15 of them but it was not realized at the time that two appeared in other catalogues. Palomar 9 is NGC 6717 and as noted above, Palomar 7 is also IC1276. The region of Palomar 7 is subject to significant interstellar absorption and the stars are thus strongly reddened. The total magnitude of the cluster is 10.3 and it is 7.1 arcminutes in diameter. Visually, many of these clusters are difficult but Palomar 7 is one of the easier ones. It is just visible in 20 cm.