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Errai

Alrai, Gamma Cephei, 35 Cephei

Orange Star in Cepheus

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Proper Names	Errai, Alrai
Bayer Designation	Gamma Cephei
Flamsteed Number	35 Cephei
HR (BSC)	8974
HD	222404
Constellation	Cepheus
Right Ascension	23h 39m 21s
Declination	+77° 37' 57"
Distance	44 light years 14 parsecs
Magnitude	Apparent: +3.2 Absolute: +2.5
Spectral Class	K1IIICN1 orange giant
Planets in this system	Tadmor (Errai A b), gas giant
Optimum Visibility	September / October (Usually visible from northern latitudes)
Notes	The orange giant at the heart of the Errai system has at least one planetary companion, a gas giant designated Gamma Cephei A b or Tadmor. Also in orbit around the primary giant star is a red dwarf with less than half the mass of the Sun, making Errai a binary system.

Imagery provided by Aladin sky atlas

One of the most northerly prominent stars with a declination of nearly eighty degrees, Errai is directly between the 'W' shape of Cassiopeia and the polar constellation Ursa Minor.

Errai (also commonly called Alrai) is a star of the subgiant class, orange in colour, that lies nearly fifty light years from Earth\'s Solar System. It is not far from the Northern Celestial Pole, and will take the role of Pole Star in the future - about a thousand years from now, Errai will be much closer to the Pole than it is today.

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