designed  by Lluís Romero Ventura
 The Earth     astrosirius@astrosirius.org 
astrophotographysirius.com

MOSAIC OF THE GREAT ORION NEBULA

This   image   is   the   result   of   the   efforts   of   three astrophotographers,       Miguel       Angel       García Borrella,   Antonio   Pérez   Ambite   and   Lluis   Romero Ventura    that,    using    different    equipment    from their       observatories       located       hundreds       of kilometres   away   have   chosen   a   common   target to   render   the   Orion   Sword   area   (one   of   the   most beautiful   areas   of   our   night   sky)   with   the   highest possible resolution and signal level.   Lluis    and    Miguel    Angel    have    contributed    with high     resolution     images     of     the     Great     Orion nebula     and     the     Running     man     nebula     and Antonio   with   the   magnificent   field   surrounding both   nebulas.   Miguel   Angel   has   also   contributed with   a   higher   resolution   image   of   the   Trapezium composed   by   very   short   shots   with   a   Takahasi Mewlon   250   telescope.   It   should   be   noted   that Antonio's   Observatory   is   located   50   km   north   of Madrid,   which   means   that   the   sky   conditions   are not optimal due to light pollution.   For   all   this   work   four   remote   observatories   have been    involved,    gathering    images    during    more than     two     months,     collecting     the     maximum possible    amount    of    signal    taking    into    account the      poor      climatology      and      lunations:      The Astrosirius    Observatory    in    Àger    (Lleida),    The Hyperion   observatory   in   Caraquiz   (Guadalajara), The   SPAG   Monfragüe   observatory   in   Monfragüe (Cáceres) and one of the e-EyE observatories in Fregenal de la Sierra (Badajoz).   The   final   image   was   obtained   from   the   assembly of    all    six    tiles,    four    of    them    with    the    same exposure   times   in   all   channels   (L-RGB)   but   with two   different   telescopes   covering   the   Orion   and the   runnning   man   nebula,   one   more   to   define the   Trapezium   cluster   and   its   surrounding   area, with   Very   short   integration   times   in   the   Ha   and RGB    channels    and,    finally,    some    hundreds    of wide   field   images   using   medium   exposure   times that    helped    to    resolve    the    dust    clouds    that surrounds   the   objects   that   compose   the   Orion Sword area.   The   best   tool   of   each   processing   program   was used, and dozens of final images were processed during     three     months,     to     obtain     the     best resolution and colour for each one.   The total amount of integrated images were 808.

MOSAIC OF THE GREAT ORION NEBULA

Place:        Monfragüe-Cáceres-Spain // Àger-Lleida-Spain // Caraquiz-Guadalajara- Spain // Fregenal de la Sierra-Badajoz-Madrid SQM:         21.7 Average (except Caraquiz) Dates:       From November 2016 till january 2017 Details Telescope:  ODK 16 f76.8 // GSO RC14 Truss // ASA N10 // Takahashi Mewlon 250 f/11 Mount:        TITAN 50 LOSMANDY // ASA DDM85 // ASA DDM85 // G11 LOSMANDY Camera:      SBIG STL 11000 C2 /AOL // Moravian G3-11000 // FLI 16803 Exposure nebula x4 Mosaic HR:                       L: 21x900 sec bin1 // RGB: 21x900 sec bin1 // Ha: 21X1 sec bin1                                            Processing:  Pixinsight Cs6, MaximDL, Photoshop Software:      CAP5, The SKY6, pixinsight, CcdStack, Sequence ASA, CCD Commander. Control Remote:  Talon6 ROR Copyright by: Miguel Ángel García Borrella: http://observatoriosspag.es/ Antonio Pérez Ambite: https://www.datsi.fi.upm.es/Hyperion/astronomia.html Lluís Romero Ventura: http://astrophotographysirius.com/

Nebula

& Dust
   Exposure nebula Surrounding:                        L: 340x300 sec bin1 // RGB: 100x300 sec bin1    Exposure Trapezium:                        L: 110x1 sec bin1 & 40x60sec bin1 // RGB: 40x60 sec bin1                        Ha: 10x600 sec bin1

MOVIE MOSAIC

THE GREAT ORION NEBULA