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Eta Coronae Borealis

2 Coronae Borealis, Gliese 584

Yellow dwarf in Corona Borealis

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Proper Name	None
Bayer Designation	Iota Cancri
Flamsteed Number	48 Cancri
HR (BSC)	5727 (A), 5728 (B)
HD	137107 (A), 137108 (B)
Other Designations	Gliese 584
Constellation	Corona Borealis
Right Ascension	15h 23m 12s
Declination	+30° 17' 16"
Distance	58 light years 18 parsecs
Magnitude	Apparent: +4.99 Absolute: +3.73
Spectral Class	G2V yellow dwarf (both components)
Planets in this system	Eta Coronae Borealis C, brown dwarf
Optimum Visibility	May / June

15 23 12.310 +30 17 16.17

FoV: 29.95'

+–

The two component stars of Eta Coronae Borealis are separated by less than an arcsecond in the sky, and are not distinguishable in this image. Eta Coronae Borealis A (the brighter of the two by a marginal amount) currently lies almost directly to the south of Eta Coronae Borealis B, though the two stars are so close together that they appear as a single point here. Imagery provided by Aladin sky atlas

A greatly magnified view of Eta Coronae Borealis as it appears from Earth. The two yellow stars that make up this binary system orbit one another over a period of nearly forty-two years.

A yellow star, similar to Earth's Sun in many ways, but with a companion that makes it a binary system. Though it varies in magnitude, it is always faint when seen from Earth.

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