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Photometry of the Galactic Cluster NGC 6649

Pik Sin The, Curt Roslund

Data & Software Engineering Research Group
STEI-ITB, Jl. Ganeca No.10, Bandung 40132, Indonesia


for eighty stars in the galactic cluster NGC 6649.

Photoelectric three-colour observations were made with the 60 inch reflector at the Boyden Observatory. Photographic plates taken in two colours with the 20-28 inch Scmidht type telescope at Lembang were used for photographic photometry.

The apparent visual distance modulus of NGC 6649 is 14.2 mag., the colour excess is1.2 mag. and the true modulus, corresponding to a distance of 1300 parsecs.

The photoelectric observation show that one of the stars in the cluster of NGC 6649 is a possible Cepheid variable.

Keywords: astronomy

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