Star profile

Nu 1 Coronae Borealis

Cool red star

3D likeness based on its real data · class M · ~3,200 K

What is Nu 1 Coronae Borealis

Nu-1 Coronae Borealis is a red giant of type M2: a surface of just 3,765 K gives it that deep, orange-tinged hue. With its sister Nu-2, it forms a warm-toned visual pair at the edge of the small diadem of the Northern Crown. Its light crosses 641 years of darkness before reaching the eye—an old flame in a young sky.

Where it is and when to see it

Nu 1 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 May, when it culminates around midnight.

From London it culminates about 72° above the horizon.
From New York it culminates about 83° above the horizon.
From Sydney it culminates about 22° above the horizon.

It can be seen from anywhere north of 56° S.

It ranks no. 14 in brightness among the 26 stars of Corona Borealis in our catalogue. To find it, start from Alphecca, the brightest: it lies about 12° away (a fist at arm's length covers about 10°).

The light you see today left it about 640 years ago.

Find it on the sky map

It opens in your browser. Free, no account, nothing to install.

Leave your signature on Nu 1 Coronae Borealis

Your name and a message go up on the map for everyone to read. Signing is free.

Without a lock, someone else can replace your signature. How the lock works

We'll ask for an email to confirm it's you, no password.

Write my signature

A public signature from a real person. The chosen name is a symbolic denomination within Stelvia, with no official standing or IAU recognition: the sky is not for sale and belongs to no one.

Astronomical data for Nu 1 Coronae Borealis

Constellation: Corona Borealis
Apparent magnitude: 5.20
Distance: 640.9 light years
Coordinates (J2000): RA 245.589° · Dec 33.799°
Catalogue: HIP 80197 · HD 147749

A symbolic commemorative gift: neither the signature nor the chosen name implies ownership of the star or recognition by the IAU.

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