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Star in the constellation Cepheus
24 Cephei is a single,
[10] yellow-hued
star in the northern
circumpolar constellation of
Cepheus . With an
apparent visual magnitude of 4.79,
[2] it is faintly visible to the naked eye. The distance to this star, based upon an annual
parallax shift of 8.3965
mas ,
[1] is around 388
light years . It is moving closer with a heliocentric
radial velocity of −17 km/s.
[4]
Keenan and McNeil (1989) listed a
stellar classification of G7 II-III
[3] for 24 Cep, matching the
spectrum of an
evolved
G-type star with blended features of a
bright giant and a
giant star . Older sources list a class of G8 III,
[11] which would suggest an ordinary giant star. At the age of 234 million years,
[5] it has an estimated 3.5
[5] times the
mass of the Sun and has expanded to about 13
[6] times the
Sun's radius . The star is radiating 199
[2] times the
Sun's luminosity from its enlarged
photosphere at an
effective temperature of 5,023 K.
[7] These coordinates are a source of
X-ray emission .
[12]
References
^
a
b
c
d
e
f
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 .
^
a
b
c 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 Keenan, Philip C.; McNeil, Raymond C. (1989), "The Perkins catalog of revised MK types for the cooler stars", The Astrophysical Journal Supplement Series , 71 : 245,
Bibcode :
1989ApJS...71..245K ,
doi :
10.1086/191373 .
^
a
b
c
d Soubiran, C.; et al. (2008), "Vertical distribution of Galactic disk stars. IV. AMR and AVR from clump giants", Astronomy and Astrophysics , 480 (1): 91–101,
arXiv :
0712.1370 ,
Bibcode :
2008A&A...480...91S ,
doi :
10.1051/0004-6361:20078788 ,
S2CID
16602121 .
^
a
b
c
d
e Takeda, Yoichi; et al. (August 2008), "Stellar parameters and elemental abundances of late-G giants", Publications of the Astronomical Society of Japan , 60 (4): 781–802,
arXiv :
0805.2434 ,
Bibcode :
2008PASJ...60..781T ,
doi :
10.1093/pasj/60.4.781 .
^
a
b Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy and Astrophysics , 367 (Third ed.): 521–524,
arXiv :
astro-ph/0012289 ,
Bibcode :
2001A&A...367..521P ,
doi :
10.1051/0004-6361:20000451 ,
S2CID
425754 .
^
a
b
c
d Koleva, M.; Vazdekis, A. (February 2012), "Stellar population models in the UV. I. Characterisation of the New Generation Stellar Library", Astronomy & Astrophysics , 538 : A143,
arXiv :
1111.5449 ,
Bibcode :
2012A&A...538A.143K ,
doi :
10.1051/0004-6361/201118065 ,
S2CID
53999614 .
^ Lèbre, A.; et al. (May 2006), "Lithium abundances and rotational behavior for bright giant stars", Astronomy and Astrophysics , 450 (3): 1173–1179,
Bibcode :
2006A&A...450.1173L ,
doi :
10.1051/0004-6361:20053485 .
^
"24 Cep" .
SIMBAD .
Centre de données astronomiques de Strasbourg . Retrieved 2018-07-06 .
^ 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 .
^ Roman, Nancy G. (1952), "The Spectra of the Bright Stars of Types F5-K5", Astrophysical Journal , 116 : 122–143,
Bibcode :
1952ApJ...116..122R ,
doi :
10.1086/145598 .
^ Haakonsen, Christian Bernt; Rutledge, Robert E. (September 2009), "XID II: Statistical Cross-Association of ROSAT Bright Source Catalog X-ray Sources with 2MASS Point Source Catalog Near-Infrared Sources", The Astrophysical Journal Supplement , 184 (1): 138–151,
arXiv :
0910.3229 ,
Bibcode :
2009ApJS..184..138H ,
doi :
10.1088/0067-0049/184/1/138 ,
S2CID
119267456 .