Hemisphere:  Northern  ·  Constellation: Cygnus (Cyg)  ·  Contains:  Extremely wide field
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Summer Triangle, 



    
        

            Thomas Richter
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Summer Triangle

Technical card

Imaging telescopes or lenses: Samyang 16mm f/2.0

Imaging cameras: Canon EOS 450Da

Mounts: SkyWatcher NEQ6 Pro Goto

Software: PhotoShop CS5


Dates:Aug. 14, 2017

Frames: 44x120" ISO800

Integration: 1.5 hours

Avg. Moon age: 21.56 days

Avg. Moon phase: 56.29%


Astrometry.net job: 2115644

RA center: 20h 7' 23"

DEC center: +35° 7' 41"

Pixel scale: 65.710 arcsec/pixel

Orientation: -86.521 degrees

Field radius: 44.613 degrees


Resolution: 4163x2669

Locations: Weißenbrunn/Altdorf, Altdorf, Bayern, Germany

Data source: Traveller

Description

I found some data from 2017 on my harddisk ;-)

The Summer Triangle is an astronomical asterism involving an imaginary triangle drawn on the northern hemisphere's celestial sphere, with its defining vertices at Altair, Deneb, and Vega, the brightest stars in the three constellations of Aquila, Cygnus, and Lyra, respectively.

The term was popularized by American author H. A. Rey and British astronomer Patrick Moore in the 1950s. The name can be found in constellation guidebooks as far back as 1913. The Austrian astronomer Oswald Thomas described these stars as Grosses Dreieck (Great Triangle) in the late 1920s and Sommerliches Dreieck (Summerly Triangle) in 1934. The asterism was remarked upon by Joseph Johann von Littrow, who described it as the "conspicuous triangle" in the text of his atlas (1866), and Johann Elert Bode connected the stars in a map in a book in 1816, although without label. These are the same stars recognized in the Chinese legend of The Cowherd and the Weaver Girl, a story dating back some 2,600 years, celebrated in the Qixi Festival. In the mid- to late-20th century, before inertial navigation systems and other electronic and mechanical equipment took their places in military aircraft, United States Air Force navigators referred to this asterism as the "Navigator's Triangle".

*wikipedia.org

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    Summer Triangle, 



    
        

            Thomas Richter
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    Summer Triangle, 



    
        

            Thomas Richter
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Description: stars faded

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Summer Triangle, 



    
        

            Thomas Richter