Izar

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Izar
Observation data
Epoch {{{epoch}}}      Equinox
Constellation Boötes
{{{component1}}}
Right ascension {{{ra1}}}
Declination {{{dec1}}}
Apparent magnitude (V) {{{appmag_v1}}}
{{{component2}}}
Right ascension {{{ra2}}}
Declination {{{dec2}}}
Apparent magnitude (V) {{{appmag_v2}}}
Characteristics
Evolutionary stage red giant
Spectral type K0
Astrometry
Distance203 light years ly
Details
Radius33[1] R
Diameter33[1] D
Luminosity (bolometric)501 L
Temperature4,550 K
Other designations
Izar, Epsilon Boötis

Izar, also known as Epsilon Boötis, is a star located in the constellation Boötes. It is located 203 light years light years away from the Earth. Izar has a diameter of 33[1] D, making it around the size of the orbit of Mercury. Izar has a stellar class of K0 and a temperature of 4,550 degrees Kelvin; it is a red giant that is currently burning elements heavier than hydrogen within its core. Izar is around 501 times brighter than the Sun. Izar has a companion, a main sequence A2 V[2] star that fuses hydrogen and can be seen with the naked eye. The believed Black Night Satellite, proposed by Icons-flag-gb-sct.png Scottish writer Duncan Lunan, is believed to have originated from this star system.

Illustration of the two components of the Izar system. North is to the top.

References[edit]


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