Alpha Coronae Borealis
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Alphekka (Alpha Coronae Borealis)
Map © 2003 Torsten Bronger
Also known as Gemma, the brightest star in the constellation Corona Borealis.
Alpha Coronae Borealis
Arabic: "bright one of the dish" (Latin: gem)
2.22 ...
Both alpha Coronae Borealis and beta Coronae Borealis are spectroscopic binaries, with periods of 17.36 days and 10.5 years respectively.
Gamma CrB is also a spectroscopic binary (period uncertain) as well as a very close visual binary (see below).
Alphecca (Gemma) = Alpha Coronae Borealis
Nusakan = Beta Coronae Borealis
Gamma Crb = Gamma Coronae Borealis &
Delta CrB = Delta Coronae Borealis
Theta CrB = Theta Coronae Borealis
Kappa CrB = Kappa Coronae Borealis # ...
Some of the brighter stream members include Alpha Coronae Borealis (α CrB or Alphecca or Gemma), Beta Aurigae (β Aur), Delta Aquarii (δ Aqr), Gamma Leporis (γ Lep) and Beta Serpentis (β Ser).
The brightest star in the constellation is [2919] alpha Coronae Borealis, also known as Gemma ("jewel"), Alphecca or Alphekka (from "nayyir al-fakka," or "the bright star of the broken ring"), Gnosia (from "Gnosia stella coronae, ...
Alphecca Alpha Coronae Borealis
Alpheratz Alpha Andromedae
Alrai Gamma Cephei
Alrakis Mu Draconis
Alrami Alpha Sagittarii
Alrischa Alpha Piscium
Alruccabah Alpha Ursae Minoris
Alsafi Sigma Draconis
Alsciaukat 31 Lyncis
Alshain Beta Aquilae ...
Alphecca; Alphacca; Gemma; Gnosia; The Jewel; Gnosia Stella Coronae; Ashtaroth.
Alpha Coronae Borealis
HR 5793
HD 139006 ...
It lies near the center (16:1:2.7+33:18:12.6, ICRS 2000.0) of Constellation Corona Borealis, the Northern Crown -- north of Iota Coronae Borealis and northeast of Theta Coronae Borealis and Alphecca (Alpha Coronae Borealis).
 See also: Coronae, Corona, Alphecca, Constellation, Gemma
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