M106 SPIRAL GALAXY

M106   also   known   as   NGC4258   Is   a   galaxy   in   the constellation     Canes     Venatici.     It     is     about     25 million     light     years     away,     and     approximately 130,000   light   years   across.      The   unusual   central glow   makes   M106   one   of   the   closest   examples   of the   Seyfert   class   of   galaxies   where   vast   amounts of   glowing   gas   are   thought   to   be   falling   into   a central massive black hole. M106     has     a     water     vapor     megamaser     (the equivalent    of    a    laser    operating    in    microwave instead   of   visible   light   and   on   a   galactic   scale) that   is   seen   by   the   22-GHz   line   of   ortho-H2O   that evidences dense and warm molecular gas. It    is    one    of    the    largest    and    brightest    nearby galaxies,    similar    in    size    and    luminosity    to    the Andromeda Galaxy. M106    has    also    played    an    important    role    in calibrating    the    cosmic    distance    ladder.    Before, Cepheid   variables   from   other   galaxies   cannot   be used    to    measure    distances    since    they    cover ranges   of   metallicities   different   from   the   Milky Way's.
designed  by Lluís Romero Ventura
 The Earth     astrosirius@astrosirius.org 
astrophotographysirius.com

M106 SPIRAL GALAXY

Place:        Ager-Lleida-Spain SQM:         21.7 Dates:       Feb 2017 to March 2017 Details Telescope:  GSO RC14 Truss Mount:        ASA DDM85 Camera:      Moravian G2-8300 Focuser:      Feather Touch 3 Kit Boss II Flattener:    TS 2.5 Filters:         Astrodon LRGB Gen2 I-Series True-Balance Exposure:    L: 27x900 sec bin1                       RGB: 42:32:29x900 sec bin1                       H-alpha: :19X1800 sec bin1 Processing:  Pixinsight & Photoshop CC Software:     MaximDL, Sequence,Autoslew Control Remote:  Talon6

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