80 Ursae Majoris

Alcor 80 Ursae Majoris
Alcyone Eta Tauri
Aldebaran Alpha Tauri
Alderamin Alpha Cephei
Aldhafera Zeta Leonis
Aldhanab Gamma Gruis
Aldhibah Zeta Draconis
Aldib Delta Draconis
Al Fawaris Delta Cygni
Alfecca Meridiana Alpha Coronae Australis ...

* 80 Ursae Majoris (Alcor) (HD 116842)
Stream stars
There is also a "stream" of stars which are likely members of the Ursa Major Moving Group, scattered more widely across the sky (from Cepheus to Triangulum Australe).

With good eyesight one can make out a faint companion just to the east of Mizar, called Alcor or 80 Ursae Majoris. The two are often called the horse and rider, and the ability to see the second is a traditional test of eyesight.

Mizar has a faint visual companion, [8334] Alcor (80 Ursae Majoris). Both stars are in fact binary systems and all the four stars involved are main sequence white dwarfs. Both Mizar and Alcor belong to the Ursa Major moving group.

5 million ly away and measures 90,000 ly across. To find it follow a chain of four magnitude 8 stars for about 5°40' E of Alcor-Mizar pair (z Ursae Majoris and 80 Ursae Majoris - see finder chart below). M101 is noticable in binoculars.

Psi UMa = Psi Ursae Majoris
10 UMa = HR 3579 Lyncis &
23 UMa = 23 Ursae Majoris
47 UMa = 47 Ursae Majoris #
78 UMa = 78 Ursae Majoris &
Alcor = 80 Ursae Majoris
HR 4067 UMa = HR 4067 Ursae Majoris # ...

See also: Mizar, Magnitude, Dubhe, Alcor, Ursa Major