Corona Borealis

Tuesday 19 September 2017 - 08:22:38 Posted by  Bobby

 Mythology of Corona Borealis

Corona Borealis is a semicircular pattern lying between Bootes and Hercules. It depicts the crown worn by the mythical princess of Ariadne of Crete when she married the god Dionysus, who threw it into the sky, where its jewels turned into stars. Appropriately, its brightest star, Alpha Coronae Borealis, magnitude 2.2, is named Gemma, Latin for "jewel."

 The Facts

  • Depiction: The Northern Crown
  • Pronounced: kor-OH-nah bor-ee-AL-is
  • Genitive: Coronae Borealis
  • Abbreviation: CrB
  • Highest in the Sky: June
  • Size Ranking: 73rd
  • Coverage Area: 179 Sq. Degrees
  • Right Acension: 16 hours
  • Declination: 30°
  • Visibility: 90°N to 54°S

 Notable Objects

  • Abell 2065: Corona Borealis Galaxy Cluster
  • R Cornae Borealis: Star
  • Struve 1932: Double Star
  • Zeta (Cornae Borealis): Star

 Named Stars

  • Alphecca, Alpha Coronae Borealis
  • Nusaken, Beta Coronae Borealis

 Best Viewed Objects/Stars

Zeta Coronae Borealis

 A double star, with components of magnitudes 5.0 and 6.0, divisible with a small telescope.

Nu Coronae Borealis

 A double star. Binoculars show the two stars, both red giants, of magnitudes 5.2 and 5.4; they lie about 550 light-years away but do not orbit each other.

R Coronae Borealis

 An unusual variable star, usually of around 6th magnitude. It is a highly luminous yellow supregiant about 7,000 light-years away. Occasionally and unpredictably, it can fade within a few weeks to as faint as a 15th magnitude, remaining there for some months before increasing in brightness again.

Corona Borealis

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