Mosaic of the Orion Nebula (M42)

Posted by astrosirius
on Sunday, April 30, 2017

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.

Details Data:

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

Telescopes: ODK 16 f76.8 // GSO RC14 Truss // ASA N10 // Takahashi Mewlon 250 f/11


Cameres: 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

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

Processing: Pixinsight Cs6, MaximDL, Photoshop

Software: CAP5, The SKY6, pixinsight, CcdStack, Sequence ASA, CCD Commander.

Remote control: Talon6 ROR

Copyright by:

Miguel Ángel García Borrella:
Antonio Pérez Ambité:
Lluís Romero Ventura:

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