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M92  GLOBULAR CLUSTER

M92   is   one   of   the   brighter   globular   clusters   in the     northern     hemisphere,     but     it     is     often overlooked   by   amateur   astronomers   because   of its     proximity     to     the     even     more     spectacular Messier   13.   It   is   visible   to   the   naked   eye   under very good conditions. According   to   newer   sources,   M92   is   about   26,000 light    years    distant,    only    little    more    than    its brighter apparent neighbor M13. Messier     92     has     a     very     low     abundance     of elements   other   than   hydrogen   and   helium.   The cluster   is   not   currently   in   a   state   of   core   collapse and the core radius is about 2 arcseconds. Only   about   16   variables   have   been   discovered   in this   globular,   14   of   which   are   of   RR   Lyrae   type, while    one    of    them    is    one    of    the    very    few eclipsing    binaries    in    globular    clusters,    of    W Ursae Majoris type.

M13 GLOBULAR CLUSTER

Place:        Ager-Lleida-Spain SQM:         21.81 Dates:       23-24 APRIL 2018 Details Telescope:  GSO RC14 Truss Mount:        ASA DDM85 Camera:      Moravian G3-11000 Focuser:      Feather Touch 3 Kit Boss II Flattener:    TS 2.5 Exposure:    L:9x300 sec bin1                       RGB: 12:12:12 x 300 sec bin1 Processing:  Pixinsight & Photoshop CC Software:     MaximDL, Sequence,Autoslew Control Remote:  Talon6

Cluster

& Stars