Star profile

31 Cepheus

3D likeness based on its real data · class F · ~6,500 K

What is 31 Cepheus

31 Cephei is a yellow-white F3 subgiant, about 3.7 times the Sun's radius and twenty-five times its luminosity. It burns at 6,700 K in the constellation named for the Ethiopian king, father of Andromeda in the Greek myth. It lies 179 light-years away: an intimate distance on galactic terms, near enough that its light crosses the void in less than two human lifetimes.

Where it is and when to see it

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

From London it never sets and culminates about 68° up.
From New York it never sets and culminates about 57° up.
From Sydney it never rises above the horizon.

It can be seen from anywhere north of 16° S.

It ranks no. 28 in brightness among the 95 stars of Cepheus in our catalogue. To find it, start from Alderamin, the brightest: it lies about 13° away (a fist at arm's length covers about 10°).

The light you see today left it about 180 years ago.

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Astronomical data for 31 Cepheus

Constellation: Cepheus
Apparent magnitude: 5.08
Distance: 179.0 light years
Coordinates (J2000): RA 338.941° · Dec 73.643°
Catalogue: HIP 111532 · HD 214470

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Other stars in Cepheus

Cepheus has 95 stars in Stelvia's catalogue. Here are a few of them.

See all 95 stars in Cepheus