Star in the constellation Cancer
For other stars with this Bayer designation , see φ Cancri .
Phi Cancri , Latinised from φ Cancri, is a solitary, orange-hued star in the constellation Cancer . It is faintly visible to the naked eye with an apparent visual magnitude of +5.57. Based upon an annual parallax shift of 8.74 mas , it is approximately 370 light-years from the Sun .
This is an evolved K-type giant star with a stellar classification of K5 III. The measured angular diameter of this star, after correction for limb darkening , is 1.87±0.02 mas . At the estimated distance of Phi Cancri, this yields a physical size of about 17 times the radius of the Sun . It is radiating 121 times the Sun's luminosity from its photosphere at an effective temperature of 4,138 K .
References
^ van Leeuwen, F. (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 .
^ Ducati, J. R. (2002), "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system", CDS/ADC Collection of Electronic Catalogues , 2237 , Bibcode :2002yCat.2237....0D .
^ 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 .
de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics , 546 : 14, arXiv :1208.3048 , Bibcode :2012A&A...546A..61D , doi :10.1051/0004-6361/201219219 , S2CID 59451347 , A61.
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 .
^ Lang, Kenneth R. (2006), Astrophysical formulae Birkhäuser , ISBN 3-540-29692-1 The radius (R* ) is given by:
2
⋅
R
∗
=
(
84.5
⋅
1.87
⋅
10
−
3
)
AU
0.0046491
AU
/
R
⨀
≈
34
⋅
R
⨀
{\displaystyle {\begin{aligned}2\cdot R_{*}&={\frac {(84.5\cdot 1.87\cdot 10^{-3})\ {\text{AU}}}{0.0046491\ {\text{AU}}/R_{\bigodot }}}\\&\approx 34\cdot R_{\bigodot }\end{aligned}}}
^ Cousins, A. W. J.; et al. (1966), "Photoelectric magnitudes and colours of southern stars, II", Royal Observatory Bulletins , 121 : 1, Bibcode :1966RGOB..121....1C .
Taylor, B. J. (February 1999), "Catalogs of temperatures and averages for evolved G and K stars", Astronomy and Astrophysics Supplement , 134 (3): 523–524, Bibcode :1999A&AS..134..523T , doi :10.1051/aas:1999153 .
De Medeiros, J. R.; et al. (November 2000), "Rotation and lithium in single giant stars", Astronomy and Astrophysics , 363 : 239–243, arXiv :astro-ph/0010273 , Bibcode :2000A&A...363..239D .
"phi01 Cnc" . SIMBAD Centre de données astronomiques de Strasbourg . Retrieved 2017-06-09.Richichi, A.; et al. (February 2005), "CHARM2: An updated Catalog of High Angular Resolution Measurements", Astronomy and Astrophysics , 431 (2): 773–777, Bibcode :2005A&A...431..773R , doi :10.1051/0004-6361:20042039 .
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