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Delta Ursae Majoris

 

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Delta Ursae Majoris



 
 
Delta Ursae Majoris (d UMa / d Ursae Majoris) is a star
Star

A star is a massive, luminous ball of Plasma that is held together by its own gravity. The nearest sta






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Delta Ursae Majoris (d UMa / d Ursae Majoris) is a star
Star

A star is a massive, luminous ball of Plasma that is held together by its own gravity. The nearest star to Earth is the Sun, which is the source of most of the energy on Earth....
 in the constellation
Constellation

A constellation is a group of stars that appear to have a physical proximity in the sky. The stars in a constellation are often vastly distant from each other, but they appear close to each other from the perspective of Earth....
 Ursa Major
Ursa Major

Ursa Major is a constellation visible throughout the year in most of the northern hemisphere. Its name means the Great Bear in Latin. It is dominated by the widely recognized asterism known as the Big Dipper or Plough, which is a useful pointer toward north, and which has mythological significance in numerous world cultures....
. It also has the traditional name Megrez .

Megrez has an apparent magnitude
Apparent magnitude

The apparent magnitude of a celestial body is a measurement of its brightness as seen by an observer on Earth, normalized to the value it would have in the absence of the Earth's atmosphere....
 of +3.32 making it the dimmest of the seven stars in the Big Dipper
Big Dipper

The seven brightest stars of the constellation Ursa Major, the Great Bear, form a well-known asterism that has been recognized as a distinct grouping in many cultures from time immemorial....
. Located 81 light years
Light Years

Light Years is the seventh album by Australian singer Kylie Minogue and was released in 2000. It reached number two in the United Kingdom and one on the Australian album charts....
 away, it is of spectral type
Stellar classification

In astronomy, stellar classification is a classification of stars based on its spectrum characteristics. The spectral class of a star, is a designation of a class to a star describing the ionization of its chromosphere, what atomic excited states are most prominent in the light, giving an objective measure of the temperature in this chr...
 A3V and thus a bluish-white main sequence
Main sequence

The main sequence is a continuous and distinctive band of stars that appear on plots of stellar Color index versus brightness. These color-absolute magnitude plots are known as Hertzsprung-Russell diagrams after their co-developers, Ejnar Hertzsprung and Henry Norris Russell....
 star. It has two faint companions, the 11th magnitude Delta Ursae Majoris B, 190 arcseconds away, and the 10th magnitude Delta Ursae Majoris C, 186 arcseconds away.

It is part of the Ursa Major moving group
Ursa Major Moving Group

The Ursa Major Moving Group, also known as Collinder 285, is the closest moving group to Earth, that is, a set of stars with common velocities in space, thought to have a common origin....
.