Particulars:
General:
The constellation which contains the celestial north pole. Ursa Minor
is also called Little Dipper because though the stars a fainter
the figure formed by the leading stars resembles the famous Big
Dipper in Ursa Major.
This constellation is nearly completely surrounded by the constellation
Draco. Only in the central region
of the celestial north pole Ursa Minor is neighboured to
Cepheus and
Camelopardalis.
The stars beta UMi, Kochab (arab. "pole star"), and
gamma UMi, Pherkad, are often called The Guardians
of the Pole or simply "The Guards".
Stars and other objects:
The Pole Star alpha UMi, commonly called Polaris,
is a Cepheid variable star. Within a period of 4 days the brightness varies
between 2.1 mag and 2.2 mag. Additionally alpha UMi is a double star;
the companion, a star of 9th mag, can be separated with small telescopes (the
separation is 18"). The F7 supergiant Polaris is famous because is lies
just one degree away from the true pole.
Close to the 3rd mag A3 giant gamma UMi, also known as Pherkad,
lies the 5 mag star 11 UMi. These two stars appear double although they
are unrelated. 11 UMi can be seen with the naked eye under good
conditions (otherwise binoculars are sufficient to show the star).
Mythological background: