Tau Cygni
Tau Cygni (τ Cyg) is a binary star system in the constellation Cygnus, approximately 69 light years away from Earth.[1] The main star, 4th magnitude GJ 822.1 A, is a yellowish white subgiant star of the spectral type F2IV. It therefore has a surface temperature of 6,000 to 7,500 kelvins and is larger, hotter, and several times as bright as our Sun.[2] Its companion, 6th magnitude GJ 822.1 B, is a yellow main sequence star of the spectral type G0V. It is similar to our Sun in size, surface temperature, and luminosity.[3]
References
- ^ a b "Simbad Query Result". Simbad. http://simbad.u-strasbg.fr/simbad/sim-id?Ident=CCDM%20J21148%2B3803AB. Retrieved October 18, 2007.
- ^ a b "Simbad Query Result". Simbad. http://simbad.u-strasbg.fr/simbad/sim-id?protocol=html&Ident=CCDM+J21148%2B3803A&NbIdent=1&Radius=2&Radius.unit=arcmin&submit=submit+id. Retrieved October 18, 2007.
- ^ a b "Simbad Query Result". Simbad. http://simbad.u-strasbg.fr/simbad/sim-id?protocol=html&Ident=CCDM+J21148%2B3803B&NbIdent=1&Radius=2&Radius.unit=arcmin&submit=submit+id. Retrieved October 18, 2007.
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← «Bright» star systems within 60–70 light-years
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Rho Puppis «Tureis» (62.7 ± 0.8 ly; 1 star)
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GJ 4130 ( 62.8 ± 1.1 ly; 2 stars, 1 planet: planet b) • Gliese 710 ( 63.0 ± 1.8 ly; 1 star) • HD 192263 ( 64.9 ± 1.5 ly; 1 star, 1 planet: planet b) • GJ 3769 ( 66.6 ± 1.5 ly; 1 star, 1 planet: planet b) • GJ 3651 ( 69.5 ± 1.5 ly; 1 star, 1 planet: planet b)‡ • GJ 4291 (70.2 ± 2.0 ly; 1 star, 1 planet: planet b)‡
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In left column are stellar classes of primary members of star systems. ‡Distance error margin extends out of declared distance interval. Italic are systems possibly located within declared distance interval, but probably not.
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