61 Ursae Majoris
Encyclopedia
61 Ursae Majoris is an orange-yellow main sequence
dwarf star
in the constellation
Ursa Major
. This star is somewhat smaller and fainter than the Sun
, and can just barely be seen by the unaided eye (based on a magnitude limit of 6).
No sub-stellar companions have been observed in orbit around this star, and it appears to lack a dust ring as is found around some comparable stars. It lies near the same line of sight as the sub-giant star HD 101212, although it is presently unclear whether these two stars are gravitationally bound or even in physical proximity.
The space velocity components of this star are = . It is orbiting the galaxy at a mean distance of 7.9 kpc from the core, and with an eccentricity of 0.06.
Main sequence
The main sequence is a continuous and distinctive band of stars that appears on plots of stellar color versus brightness. These color-magnitude plots are known as Hertzsprung–Russell diagrams after their co-developers, Ejnar Hertzsprung and Henry Norris Russell...
dwarf star
Star
A star is a massive, luminous sphere of plasma held together by gravity. At the end of its lifetime, a star can also contain a proportion of degenerate matter. The nearest star to Earth is the Sun, which is the source of most of the energy on Earth...
in the constellation
Constellation
In modern astronomy, a constellation is an internationally defined area of the celestial sphere. These areas are grouped around asterisms, patterns formed by prominent stars within apparent proximity to one another on Earth's night sky....
Ursa Major
Ursa Major
Ursa Major , also known as the Great Bear, is a constellation visible throughout the year in most of the northern hemisphere. It can best be seen in April...
. This star is somewhat smaller and fainter than the Sun
Sun
The Sun is the star at the center of the Solar System. It is almost perfectly spherical and consists of hot plasma interwoven with magnetic fields...
, and can just barely be seen by the unaided eye (based on a magnitude limit of 6).
No sub-stellar companions have been observed in orbit around this star, and it appears to lack a dust ring as is found around some comparable stars. It lies near the same line of sight as the sub-giant star HD 101212, although it is presently unclear whether these two stars are gravitationally bound or even in physical proximity.
The space velocity components of this star are = . It is orbiting the galaxy at a mean distance of 7.9 kpc from the core, and with an eccentricity of 0.06.