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Zeta Cygni (ζ Cyg) and CCDM J21129+3014B form a binary star system in the constellation Cygnus, approximately 151 light-years away from Earth.
The main star, 3rd magnitude Zeta Cygni, is a yellow star of the spectral type G8III. It has a radius 14.7 times that of our Sun and shines 119 times brighter in comparison. Its most likely status is as a core-helium fusing giant star, although it could be in transition to gianthood with a tranquil helium core. Assuming the former, it has a mass 3.0 solar masses and an age of 400 million years. Zeta Cygni has an abundance of barium, and other heavy chemical elements, in its atmosphere.[1][3]
Zeta Cygni has a 12th magnitude companion, assumed to be a white dwarf. It orbits every 6489 days, or every 17.8 years. A theoretical study shows the system started off with solar masses of 3.0 and 2.5, but the more massive star lost some of its mass in becoming a white dwarf. It sent half a solar mass to Zeta Cygni, along with the heavy chemical elements it possesses today.[3]
Stars components
CCDM J21129+3014B (Zeta Cygni B)| Database references |
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| SIMBAD | data |
CCDM J21129+3014C (Zeta Cygni C)| Database references |
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| SIMBAD | data |
CCDM J21129+3014D (Zeta Cygni D)| Database references |
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| SIMBAD | data |
References
Citations
- ^ a b "Simbad Query Result". Simbad. http://simbad.u-strasbg.fr/simbad/sim-id?protocol=html&Ident=CCDM+J21129%2B3014A&NbIdent=1&Radius=2&Radius.unit=arcmin&submit=submit+id. Retrieved October 18, 2007.
- ^ "Simbad Query Result". Simbad. http://simbad.u-strasbg.fr/simbad/sim-id?protocol=html&Ident=CCDM+J21129%2B3014B&NbIdent=1&Radius=2&Radius.unit=arcmin&submit=submit+id. Retrieved October 18, 2007.
- ^ a b ""Zeta Cyg"". http://www.astro.uiuc.edu/~kaler/sow/zetacyg.html. Retrieved October 17, 2007.
| Stars of Cygnus |
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κ • 2 • 4 • β (Albireo) • ι 1 • 8 • 9 • ι 2 • 11 • φ • θ • 14 • 15 • 16 • 17 • δ • 19 • 20 • η • 22 • 23 • ψ • 25 • 26 • 27 • 28 • 29 • 30 • ο 1 • ο 2 • 33 • 34 (P) • 35 • 36 • γ • 39 • 40 • 41 • 42 • 43 • 44 • ω 1 • ω 2 • 47 • 48 • 49 • α (Deneb) • 51 • 52 • ε • λ • 55 • 56 • 57 • ν • 59 • 60 • 61 • ξ • 63 • ζ • τ • υ • σ • 68 • 69 • 70 • 71 • 72 • ρ • 74 • 75 • 76 • 77 • μ • 79 • π 1 • π 2 • χ | |
| List |
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