Zeta Cygni

Starbox begin
name=Zeta Cygni / CCDM J21129+3014Bcite web
title=Simbad Query Result | work=Simbad
url=http://simbad.u-strasbg.fr/simbad/sim-id?protocol=html&Ident=CCDM+J21129%2B3014A&NbIdent=1&Radius=2&Radius.unit=arcmin&submit=submit+id
accessdate=October 18
accessyear=2007] [cite web
title=Simbad Query Result | work=Simbad
url=http://simbad.u-strasbg.fr/simbad/sim-id?protocol=html&Ident=CCDM+J21129%2B3014B&NbIdent=1&Radius=2&Radius.unit=arcmin&submit=submit+id
accessdate=October 18
accessyear=2007] Starbox observe
epoch=J2000.0
constell=Cygnus
ra=RA|21|12|56.1862 / RA|21|12|53.9s
dec=DEC|+30|13|36.897 / DEC|+30|12|36
appmag_v=3.20 / 11.6Starbox character
class=G8III / ?
b-v=+0.99 / ?
u-b=+0.76 / ? |Starbox astrometry
radial_v=17.4 / ?
prop_mo_ra=6.87 / ?
prop_mo_dec=-68.12 / ?
gal_lat=-12.4523
gal_lon=076.7538 parallax=21.62
p_error=0.63 |Starbox detail
mass=3 / 2.5
radius=?
luminosity=?
temperature= 7125
metal=?
gravity=?
rotation=?
age= 400 million Starbox visbin
name=Zeta Cygni B (CCDM J21129+3014B)
period=17.8
axis= 69
eccentricity=
inclination=204
node=
periastron=

Starbox visbin
name=Zeta Cygni C
period=
axis=90.4
eccentricity=
inclination= 300
node=
periastron=

Starbox visbin
name=Zeta Cygni D
period=
axis=102.8
eccentricity=
inclination=66
node=
periastron=

Starbox catalog
names=Zeta Cygni, 64 Cygni, HR 8115, BD+29°4348, HD 202109, SAO 71070, HIP 104732, GC 29661, GSC 02702-02764, CCDM J21129+3014 Starbox reference
Simbad=Zeta+Cygni

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.cite web | title="Zeta Cyg" | url=http://www.astro.uiuc.edu/~kaler/sow/zetacyg.html | accessdate= October 17 | accessyear= 2007 ]

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.

References

* http://www.aanda.org/index.php?option=article&access=standard&Itemid=129&url=/articles/aa/full/2004/37/aa0922/aa0922.right.html

tars components

Starbox begin
name=CCDM J21129+3014B (Zeta Cygni B)Starbox reference
Simbad=CCDM+J21129+3014B

Starbox begin
name= CCDM J21129+3014C (Zeta Cygni C) Starbox reference
Simbad=CCDM+J21129+3014C

Starbox begin
name= CCDM J21129+3014D (Zeta Cygni D) Starbox reference
Simbad=CCDM+J21129+3014D