Orange subgiant · Cepheus

Errai

Also known as: γ Cephei (γ Cep), HIP 116727

mag 3.246 light-years

About

Errai (γ Cephei) is an orange subgiant of magnitude 3.2 in Cepheus, about 46 light-years away.

Errai is in the constellation Cepheus.
Best evenings: around late October it is highest at about 9 pm (10 pm in summer time); a month earlier, two hours later.
Where on Earth: it is seen well, at least 10° up, from north of 2° S.

When it rises and sets tonight, how high it climbs and how much the Moon gets in the way are worked out in your browser for your place.

EyesVisible from the suburbs on a clear night, but lost in bright city skies.
Binoculars (10×50)A sharp point; binoculars bring out its colour and the fainter stars around it.
Telescope (6–8 inch)Still a point of light at any magnification — stars are too far away to show a disc. Low in the sky, bright stars twinkle and flash colours.

Stars look the same in any instrument: brighter and sharper, but never bigger.

Proper name	Errai
Designation	γ Cephei (γ Cep)
Hipparcos number	HIP 116727
Type	Orange subgiant
Spectral type	K1IV
Colour	Pale orangeB−V colour index 1.03
Magnitude	3.2The smaller the number, the brighter.
Distance	46 light-yearsThe light you see left it around 1980.
Proper motion	0.14″ per year across the sky
Constellation	Cepheus
Right ascension (J2000)	23h 39m 21.0s
Declination (J2000)	+77° 37′ 56″