Hemisphere:  Northern  ·  Constellation: Vulpecula (Vul)  ·  Contains:  The star 4Vul  ·  The star 5Vul
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Cr 399, The Coathanger asterism, 


            José J. Chambó
Cr 399, The Coathanger asterism
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Cr 399, The Coathanger asterism

Technical card

Imaging telescopes or lenses: GSO Newton 8" f/4

Imaging cameras: Canon EOS 100D

Dates:July 10, 2016

Frames: 16x240" (1h 4')

Integration: 1h 4'

Avg. Moon age: 6.00 days

Avg. Moon phase: 35.54%

Basic astrometry details

Astrometry.net job: 1182414

RA center: 19h 26' 11"

DEC center: +20° 4' 58"

Pixel scale: 5.257 arcsec/pixel

Orientation: 1.502 degrees

Field radius: 1.053 degrees

Resolution: 620x413

Locations: Hoya Redonda - Valencia (Spain), Enguera, Valencia, Spain


"The Coathanger" or Collinder 399 (Cr 399) is an asterism: a grouping of stars that can be see from Earth showing a peculiar alignment which in this case seems the shape of a coathanger. The straight line formed by six stars is the support and four stars in its south side forms the hook.

Was first described by the Persian astronomer Abd Al-Rahman Al Sufi in his "Book of Fixed Stars" written on year 964. Immersed into the Milky Way is located between constellations Vulpecula and Sagitta. Its ten stars have a brightness from 5 to 7 magnitude. Under a dark sky can be seen at naked eye as an unresolved patch of light, but using only a binoculars appears immediately the Coathanger.

Posted in my Blog Cometografia.es


Sky plot

Sky plot


Cr 399, The Coathanger asterism, 


            José J. Chambó