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M 10

Kroglasta kopica - Globular Cluster M10 (NGC 6254), class VII, in ophiuchus

Rektascenzija 16 : 57.1 (u:m)
Deklinacija -04 : 06 (sto:m)
Razdalja 13.4 (*1000 sv.l.)
Vizual. magnituda 6.6 (mag)
Zorni kot 15.1 (loc min)

This 7th mag globular cluster is about 15.1 arc minutes in diameter, more than half the diameter of the full moon. At its distance of 16,000 light years, this corresponds to a linear diameter of 70 light years. Its bright core, however, is only little more than half as large. It is receding at 69 km/sec.

Its central region, according to Mallas, appears pear-shaped, with a grainy texture; the outer regions show brighter knots at medium magnification (120x).

According to Burnham, the extremely low number of only 3 variables has been found in M10; the ``Catalog of Galactic Globular Clusters" of R. Monella of the Sharru Astronomical Observatory, COVO (Bergamo), Italy (ADC/CDS number VII, 103) gives the number of 4.

  • Vec posnetkov M10

    Povzeto po:
    Hartmut Frommert (spider@seds.org)
    Christine Kronberg (smil@lrz.uni-muenchen.de)

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