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A-type main sequence star in the constellation Cygnus
Iota2 Cygni ,
Latinized from ι2 Cygni and often simply called ι Cygni,
[8] is a single
[9]
star in the
constellation
Cygnus . It is visible to the naked eye as a white-hued point of light with an
apparent visual magnitude of 3.76.
[2] Located around 121.3 light-years distant from the Sun based on
parallax ,
[1] it is drifting closer with a
radial velocity of −19.5 km/s and is expected to come to within 92 light-years in around 783,000 years.
[2]
This it is an
A-type main-sequence star with a
stellar classification of A5V,
[3] a star that is currently fusing its core
hydrogen . It is around 577
[4] million years old and is spinning rapidly with a
projected rotational velocity of 240 km/s.
[6] The star has 1.8
[4] times the
mass of the Sun and 3.8
[5] times the
Sun's radius . It is radiating 35
[5] times the
luminosity of the Sun from its
photosphere at an
effective temperature of 8,216 K.
[4] Based on rapid changes in the strength of a singly-ionized
calcium absorption line, the star is likely host to a
circumstellar disk .
[10]
References
^
a
b
c
d
e
f van Leeuwen, F. (November 2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics . 474 (2): 653–664.
arXiv :
0708.1752 .
Bibcode :
2007A&A...474..653V .
doi :
10.1051/0004-6361:20078357 .
S2CID
18759600 .
^
a
b
c
d
e
f Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters . 38 (5): 331.
arXiv :
1108.4971 .
Bibcode :
2012AstL...38..331A .
doi :
10.1134/S1063773712050015 .
S2CID
119257644 .
^
a
b Chesneau, O.; et al. (2010).
"Time, spatial, and spectral resolution of the Hα line-formation region of Deneb and Rigel with the VEGA/CHARA interferometer" . Astronomy and Astrophysics . 521 : A5.
arXiv :
1007.2095 .
Bibcode :
2010A&A...521A...5C .
doi :
10.1051/0004-6361/201014509 .
S2CID
10340205 .
^
a
b
c
d
e
f
g David, Trevor J.; Hillenbrand, Lynne A. (2015), "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets", The Astrophysical Journal , 804 (2): 146,
arXiv :
1501.03154 ,
Bibcode :
2015ApJ...804..146D ,
doi :
10.1088/0004-637X/804/2/146 ,
S2CID
33401607 .
^
a
b
c
d
Brown, A. G. A. ; et al. (Gaia collaboration) (August 2018).
"Gaia Data Release 2: Summary of the contents and survey properties" .
Astronomy & Astrophysics . 616 . A1.
arXiv :
1804.09365 .
Bibcode :
2018A&A...616A...1G .
doi :
10.1051/0004-6361/201833051 .
Gaia DR2 record for this source at
VizieR .
^
a
b Zorec, J.; Royer, F. (January 2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics , 537 : A120,
arXiv :
1201.2052 ,
Bibcode :
2012A&A...537A.120Z ,
doi :
10.1051/0004-6361/201117691 ,
S2CID
55586789 .
^
"iot02 Cyg" .
SIMBAD .
Centre de données astronomiques de Strasbourg . Retrieved 2019-09-11 .
^ Kaler, Jim.
"Kappa, Iota Cygni" . STARS . Retrieved 2016-05-19 .
^ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society , 389 (2): 869–879,
arXiv :
0806.2878 ,
Bibcode :
2008MNRAS.389..869E ,
doi :
10.1111/j.1365-2966.2008.13596.x ,
S2CID
14878976
^ Montgomery, Sharon L.; Welsh, Barry Y. (October 2012).
"Detection of Variable Gaseous Absorption Features in the Debris Disks Around Young A-type Stars" . Publications of the Astronomical Society of the Pacific . 124 (920): 1042–1056.
Bibcode :
2012PASP..124.1042M .
doi :
10.1086/668293 .