Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000eaa..booke5006.&link_type=abstract
"Encyclopedia of Astronomy and Astrophysics, Edited by Paul Murdin, article 5006. Bristol: Institute of Physics Publishing, 2001
Astronomy and Astrophysics
Astrophysics
Stars, Individual Stellar Objects
Scientific paper
The star α Cygni, `the Tail of the Swan'. One of the three bright stars which form the asterism of the Summer Triangle, with Altair and Vega. It is a white supergiant of spectral type A2Ia, apparent magnitude 1.25. It is a very distant star (approx. 3230 light-years, parallax 0.001''), and is the type-star of a class of pulsating variables, varying rather erratically over a range of ±0.04 magnitu...
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