Alpha Andromedae B

Alpha Andromedae B or more commonly Alpheratz B, is a G-type star and the binary partner of Alpheratz. It is located around 1,360 light-years away from the Sun located northeast of Pegasus, and is near of the Great Square of Pegasus.

Although they seem to be a single star, they are actually binary star system consisting of 2 stars in close orbit. They also seem to be very close to each other, but they are actually 1,263 light-years away from each other, even longer than the distance between Alpheratz and the Sun.

Name
Alpheratz B is a common name of ADS 94 B because of its being a partner of Alpheratz A. This is also goes the same for Alpha Andromedae B (abbreviated to α And b). All other designations and names are Alpheratz A's other designation and names followed by the letter B, because of the star being its partner.

Binary System
Alpheratz B was first resolved interferometrically by Xiaopei Pan and his coworkers during 1988 and 1989, using the Mark III Stellar Interferometer at the Mount Wilson Observatory, California, United States. This work was published in 1992. Because of the difference in luminosity between the two stars, its spectral lines were not observed until the early 1990s, in observations made by Jocelyn Tomkin, Xiaopei Pan, and James K. McCarthy between 1991 and 1994 and published in 1995.

The two stars are now known to orbit each other with a period of 96.7 days. The larger, brighter star, called the primary, has a spectral type of B8IVpMnHg, a mass of approximately 3.6 solar masses, a surface temperature of about 13,800 K, and, measured over all wavelengths, a luminosity of about 200 times the Sun's.

Position
There is not much known unique facts about ADS 94 B position, except that its 1,263 light-years away from its partner.

It is in the constellation of Andromeda.