Beta Comae Berenices (β Comae Berenices, β Com) is a main sequence dwarf star in the northern constellation of Coma Berenices. It is located at a distance of about 29.95 light-years (9.18 parsecs) from Earth. The Greek letter beta (β) usually indicates that the star has the second highest visual magnitude in the constellation. However, with an apparent visual magnitude of 4.3,[2] this star is actually slightly brighter than α Comae Berenices. It can be seen with the naked eye, but may be too dim to be viewed from a built-up urban area.
The star is similar to the Sun, being only slightly larger and brighter in absolute magnitude. It has a stellar classification of G0 V,[3] compared to G2 V for the Sun. The effective temperature of the outer envelope is 5,936 K,[9] giving it a yellow hue of a G-type star.[14] In terms of age it is younger than the Sun, being about 3 billion years old.[12]
Observations of short term variations in the chromatic activity suggest that the star undergoes differential rotation,[15] with a rotation period of about 11–13 days.[11] Its surface has a measured activity cycle of 16.6 years, compared to 11 years on the Sun. It may also have a secondary activity cycle of 9.6 years.[16] At one time it was thought that this star might have a spectroscopic companion. However, this was ruled out by means of more accurate radial velocity measurements. No planets have yet been detected around it, and there is no evidence of a dusty disk.
The habitable zone for this star, defined as the locations where liquid water could be present on an Earth-like planet, is 0.918–1.96 AU, where 1 AU is the average distance from the Earth to the Sun.[17]
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^ abcBrown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
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and 16 Related for: Beta Comae Berenices information
BetaComaeBerenices (β ComaeBerenices, β Com) is a main sequence dwarf star in the northern constellation of Coma Berenices. It is located at a distance...
constellation's brightest star is BetaComaeBerenices, a 4.2-magnitude main sequence star similar to the Sun. Coma Berenices contains the North Galactic Pole...
Coma Berenices, south of the constellation Canes Venatici. It can be traced by following the line from BetaComaeBerenices to Gamma ComaeBerenices. With...
difficult to detect. Other classes of unstable main-sequence stars, like Beta Cephei variables, are unrelated to this instability strip. The total amount...
Panov, K.; Dimitrov, D. (May 2007). "Long-term photometric study of FK ComaeBerenices and HD 199178". Astronomy and Astrophysics. 467 (1): 229–235. Bibcode:2007A&A...
Cheng Kung University WebBBS System Ian Ridpath's Startales - Coma Berenices the Berenice's Hair (in Chinese) AEEA (Activities of Exhibition and Education...
G-type red giant. Arcturus (α Boötis), a K-type giant. Gamma ComaeBerenices (γ ComaeBerenices), a K-type giant. Mira (ο Ceti), an M-type giant and prototype...
Virginis, Eta Virginis, Gamma Virginis, Epsilon Virginis and Alpha ComaeBerenices. Consequently, the Chinese name for Delta Virginis itself is 太微左垣三...
Epsilon Virginis, Eta Virginis, Gamma Virginis, Delta Virginis and Alpha ComaeBerenices. Consequently, the Chinese name for Epsilon Virginis itself is 太微左垣四...
Virginis, Eta Virginis, Delta Virginis, Epsilon Virginis and Alpha ComaeBerenices. Consequently, the Chinese name for Gamma Virginis itself is 太微左垣二...
Virginis, Gamma Virginis, Delta Virginis, Epsilon Virginis and Alpha ComaeBerenices. Consequently, the Chinese name for Eta Virginis itself is 太微左垣一 (Tài...
Astronomy) 天文教育資訊網 2006 年 7 月 15 日 Ian Ridpath's Star Tales - Coma Berenices the Berenice's Hair (in Chinese)AEEA (Activities of Exhibition and Education in...