The Aka Oni mask



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Sh2-173 is an emission nebula laying in the constellation of Cassiopeia.
It's an HII region with a diameter of 77 l.y. located around 8800 l.y. from the Earth, in the Perseus arm of our galaxy, in corrispondence of the Caasiopeia association OB5, which includes open clusters an other nebulae like Sh2-172 and Sh2-177. It contains several young stars, resposible of the ionization of the region. [Wiki]


Optic RC8 f/6
Camera QSI 683 WS
Filters Astrodon Ha, R, G, B
Mount NEQ6 with EQASCOM
Guide
OAG with Lodestar
Frame center
RA 00:22:25 DEC 61:45:00 J2000
Date
4th 5th October 2018
Site
Astrobioparco di Felizzano, AL, Italy
Exposures Ha - 50x1200s @-15C bin 1x1
R - 6x600s bin 2x2
G - 6x600s bin 2x2
B - 6x600s bin 2x2

Integration time - 19h 40m

Notes
Raw data kindly provided by Davide Coverta
Sh2-173

Sh2-173

Sh2-173

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