Star profile

Eta Coronae Borealis

3D likeness based on its real data · class G · ~5,500 K

What is Eta Coronae Borealis

Eta Coronae Borealis is a remarkable binary system just 58 light-years away: two yellow stars almost identical to the Sun orbit each other in a little over forty years, so close together that only larger telescopes can split them. One of the few accessible pairs of true solar twins: two suns turning a slow waltz inside the diadem of the Northern Crown.

Where it is and when to see it

Eta Coronae Borealis lies in the northern celestial hemisphere. It is visible to the naked eye under a dark sky. Its best month of the year is April, when it culminates around midnight.

From London it culminates about 69° above the horizon.
From New York it culminates about 80° above the horizon.
From Sydney it culminates about 26° above the horizon.

It can be seen from anywhere north of 60° S.

It ranks no. 12 in brightness among the 26 stars of Corona Borealis in our catalogue. To find it, start from Alphecca, the brightest: it lies about 4° away (a fist at arm's length covers about 10°).

The light you see today left it about 58 years ago.

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Astronomical data for Eta Coronae Borealis

Constellation: Corona Borealis
Apparent magnitude: 4.99
Distance: 58.3 light years
Coordinates (J2000): RA 230.801° · Dec 30.288°
Catalogue: HIP 75312 · HD 137107

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Other stars in Corona Borealis

Corona Borealis has 26 stars in Stelvia's catalogue. Here are a few of them.

See all 26 stars in Corona Borealis