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Messier 30 (also known as M30 or NGC 7099) is a globular cluster of stars in the southeast of the southern constellation of Capricornus, at about the declination of the Sun when the latter is at December solstice.[a] It was discovered by the French astronomer Charles Messier in 1764, who described it as a circular nebula without a star. In the New General Catalogue, compiled during the 1880s, it was described as a “remarkable globular, bright, large, slightly oval.” It can be easily viewed with a pair of 10×50 binoculars,[10] forming a patch of hazy light some 4 arcminutes wide that is slightly elongated along the east–west axis.[10] With a larger instrument, individual stars can be resolved and the cluster will cover an angle of up to 12 arcminutes across graduating into a compressed core about one arcminute wide that has further star density within.

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li 247 M30 7099

Observation Log Information
Log Index:701
Equipment:110mmDoublet EP APO – Meade CCD PF

Keywords: M30, globular cluster, Capricornus, Messier, NGC7099

January 16, 2024
Roger Nelson

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