α Coronae Borealis

Finding Corona Borealis is quite easy. With the naked eye, beginning at Arcturus (alpha Boötis), note the shallow triangle formed with epsilon Boötis to the northeast and alpha Coronae Borealis to the east: naked eyes.

Alpha Coronae Borealis—Gemma or Alphecca—is the brightest member of this pleasant grouping with a visual magnitude of 2.2: binoculars.

Eta CrB (binary label Struve 1937) is a multiple binary with faint components. The closest component B is a challenge for telescopes: 5.6, 6.0; 194º, 0.7" with an orbit of 41.56 years.

Component D is the most accessible, although it is very faint: AD 5.0, 11.0; 41º, 218".

Gamma CrB is closeby.

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© 1999-2014 by Richard Dibon-Smith.