Pickering’s Triangle in Cygnus
Pickering’s Triangle is the middle part of the Cygnus Loop, a supernova remnant with an age of about 15’000 years. It is much fainter than NGC 6992 (Eastern Part) and NGC 6960 (Western Part) and has no NGC number assigned. It was discoverd by Williamina Fleming but credited to Edward Pickering, the director of her observatory.
The image is a combination of narrowband data (Ha and OIII) and color data. North is up in this image.
[description from wikipedia]
Details
Telescope:
RCOS 14.5” f/8
Mount:
ASA DDM85
Camera:
Apogee U16M
Filters:
Astrodon Gen2
Exposure:
HaOIIIRGB 560:680:160:200:240 min.
Location:
ROSA Remote Observatories Southern Alps
Author:
© Martin Rusterholz, Astrophotographer

Hello, my name is Martin Rusterholz. I’m a Swiss amateur astrophotographer living near Zurich, the biggest town in Switzerland. My interest in astronomy started when I was 16. At that time, I built my first Newtonian telescope and mount. I studied physics at the Swiss Federal Institute of Technology (ETH) which was the only study including at least some aspects of astronomy and astrophysics.
“Looking at the nights sky is an experience touching everybody deeply inside, something common to all human beings independent to the language spoken by the individuals”.
Deep-sky astrophotography is my passion.