Kruger 60
Vorlage:Starbox begin Vorlage:Starbox observe 2s Vorlage:Starbox character Vorlage:Starbox astrometry Vorlage:Starbox detail Vorlage:Starbox orbit Vorlage:Starbox catalog Vorlage:Starbox end Kruger 60 is a binary star system located 13.15 light-years from the Sun. These red dwarf stars orbit each other every 44.6 years.
The larger, primary star is designated component A, while the secondary, smaller star is labeled component B. Component A has about 27% of the Sun's mass and 35% of the Sun's radius. Component B has about 18% of the Sun's mass and 24% of the Sun's radius.[1][2] Component B is a flare star and has been given the variable star designation "DO Cephei".[3] It is an irregular flare that typically doubles in brightness and then returns to normal over an 8 minute period.Vorlage:Fact
On average, the two stars are separated by 9.5 AUs, which is roughly the average distance of Saturn from the Sun. However, their eccentric mutual orbit causes their distance to vary between 5.5 AUs at periastron, to 13.5 at apastron.Vorlage:Fact
This system is orbiting through the Milky Way at a distance from the core that varies from 7–9 kpc with an orbital eccentricity of 0.126–0.130.[4] The closest approach to the Sun will occur in about 88,600 years when this system will come within 1.95 parsecs.[5]
References
Further reading
- James Kaler, Extreme Stars, (Cambridge: Cambridge UP, 2001), p. 32.
- ↑ Delfosse, X., et al.: Accurate masses of very low mass stars. IV. Improved mass-luminosity relations. In: Astronomy and Astrophysics. 364. Jahrgang, Dezember 2000, S. 217–224, bibcode:2000A&A...364..217D.
- ↑ Pasinetti Fracassini, L. E., et al.: Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics. In: Astronomy and Astrophysics. 367. Jahrgang, Februar 2001, S. 521–524, doi:10.1051/0004-6361:20000451. The data is from the Vizier II/224 catalogue.
- ↑ White, Stephen M., et al.: A VLA survey of nearby flare stars. In: Astrophysical Journal Supplement Series. 71. Jahrgang, Dezember 1989, S. 895–904, doi:10.1086/191401.
- ↑ C. Allen, Herrera, M. A.: The galactic orbits of nearby UV Ceti stars. In: Revista Mexicana de Astronomia y Astrofisica. 34. Jahrgang, 1998, S. 37–46 (harvard.edu [abgerufen am 13. Juni 2008]).
- ↑ García-Sánchez, J., et al.: Stellar encounters with the solar system. In: Astronomy and Astrophysics. 379. Jahrgang, November 2001, S. 634–659, doi:10.1051/0004-6361:20011330.