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Sergio Eguivar

Location of Photo:

Alberti, Buenos Aires, Argentina

Date/Time of photo:



8" reflector, Televe Paracorr, QSI 583 WS, NEQ6


essier 22, also known as NGC 6656, is an elliptical globular cluster in the constellation of Sagittarius. Because the cluster is located near the galactic plane the background is packed of stars. It is one of the brightest globular visible in the night sky. The brightest stars are 11th magnitude, with hundreds of stars bright enough to resolve with an 8 inches telescope. Messier 22 was one of the first globular to be discovered. In 1665 German amateur astronomer Abraham Ihle spotted a hazy patch of stars while looking to planet Saturn which was passing by. In 1764 it was included in Charles Messier catalogue of "comet - like" objects. The cluster spans over 99 +/- 9 light years in its diameter.