SZ Crateris

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SZ Crateris is a binary star system in the southern constellation Crater. Both components belong to the main sequence: the primary star has a spectral classification of K5V while the secondary is a red dwarf of spectral class M0V. The radius of the primary is about 66% the radius of the Sun, while the secondary member is only about 42% of the solar radius. In 1994, the two stars were separated by 5.1 arc seconds, which is equivalent to 112.41 astronomical units.[1]

SZ Crateris is classified as a marginal BY Draconis variable, and has an optical variability cycle of 11.58 days. (The star causing the variability is unspecified.)[2] Compared to the Sun, SZ Crateris has a slightly higher proportion of elements other than hydrogen and helium.[3] Based upon gyrochronology, the estimated age of this star is under 200 million years.[4]

The SZ Crateris system is a member of the Ursa Major moving group of stars that have similar motions through space.[3] The space velocity components of this system are U = Template:Nowrap, V = Template:Nowrap and W = Template:Nowrap.[5] It is on an orbit through the Milky Way that has an orbital eccentricity of 0.092, which will bring it as close as Template:Convert to the galactic core, and as distant as Template:Convert. The inclination of the orbit carries the system as much as Template:Convert from the plane of the galactic disk.[6]

Notes

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References

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