NGC 6522 and 6528   HOME INDEX BACK NEXT

Globular clusters in Sagittarius

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These two clusters are not as big or bright as some of the globular clusters visible in the summer sky, but they make an interesting sight because of their proximity and their contrasting backgrounds. NGC 6522 (on the right) is seen against a very dense portion of the Milky Way, whereas NGC 6528 is on the edge of a dark nebula. The clusters are 16 arcminutes apart, and can be seen together in the same field of view through a telescope at moderate magnification.

NGC 6522:

Magnitude 8.6
Apparent Size 5.6'
Distance (light yrs) 25,400
Right Ascension 18:03.6
Declination -30 02
Field of View 38' x 25.3'

NGC 6528:

Magnitude 9.5
Apparent Size 3.7'
Distance (light yrs) 25,800
Right Ascension 18:04.8
Declination -30 03
Field of View 38' x 25.3'

Image details:  12 images, each 90 seconds at ISO 1600, taken with a Canon 400D camera through a Meade 12” telescope at f/6.8. 

July 2010