Top Qs
Timeline
Chat
Perspective
Omicron Boötis
Star in the constellation Boötes From Wikipedia, the free encyclopedia
Remove ads
Omicron Boötis is a yellow-hued star in the northern constellation of Boötes. Its name is a Bayer designation that is Latinized from ο Boötis, and abbreviated Omicron Boo or ο Boo. With an apparent visual magnitude of +4.60,[2] it is a fifth magnitude star that is faintly visible to the naked eye. Based upon an annual parallax shift of 12.68 mas as seen from the Earth,[1] it is located at a distance of approximately 257 light-years (78.9 pc). The star is moving closer to the Sun with a radial velocity of −9 km/s.[7]
At the age of 2.72 billion years,[5] this is an evolved G-type giant star with a stellar classification of G8.5 III.[4] It belongs to the so-called red clump, which indicates it is generating energy through helium fusion at its core.[3] Although it displays a higher abundance of barium than is normal for a star of its type, Williams (1975) considers its status as a barium star to be "very doubtful".[9] The star has double[5] the mass of the Sun and has expanded to 11[7] times the Sun's radius. It is radiating 85 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,864 K.[5]
Remove ads
References
External links
Wikiwand - on
Seamless Wikipedia browsing. On steroids.
Remove ads