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K-type giant star in the constellation Cancer
1 Cancri is a single
[2]
star in the
zodiac
constellation of
Cancer , positioned near the border with
Gemini at a distance of around 467
light years from the Sun. It is barely visible to the naked eye as a dim, orange-hued star with an
apparent visual magnitude of 5.97. The object is moving further from the Earth with a heliocentric
radial velocity of +14 km/s.
This is an
evolved
giant star with a
stellar classification of K3− III,
[3] having exhausted the hydrogen at its core and expanded. It is specified as a spectral standard for that type.
[3] The
angular diameter of the star measured from a
lunar occultation is 2.1± 0.6
mas ,
[9] which, at its estimated distance, equates to a physical radius of about 19 times the
radius of the Sun . It is radiating 199 times the
Sun's luminosity from its enlarged
photosphere at an
effective temperature of 4,231
K .
References
^
a
b
c
d
e
f
g Vallenari, A.; et al. (Gaia collaboration) (2023).
"Gaia Data Release 3. Summary of the content and survey properties" . Astronomy and Astrophysics . 674 : A1.
arXiv :
2208.00211 .
Bibcode :
2023A&A...674A...1G .
doi :
10.1051/0004-6361/202243940 .
S2CID
244398875 .
Gaia DR3 record for this source at
VizieR .
^
a
b 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 .
^
a
b
c Keenan, Philip C.; McNeil, Raymond C. (1989), "The Perkins catalog of revised MK types for the cooler stars", Astrophysical Journal Supplement Series , 71 : 245,
Bibcode :
1989ApJS...71..245K ,
doi :
10.1086/191373 .
^
a
b 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 .
^ Anders, F.; Khalatyan, A.; Chiappini, C.; Queiroz, A. B.; Santiago, B. X.; Jordi, C.; Girardi, L.; Brown, A. G. A.; Matijevič, G.; Monari, G.; Cantat-Gaudin, T.; Weiler, M.; Khan, S.; Miglio, A.; Carrillo, I.; Romero-Gómez, M.; Minchev, I.; de Jong, R. S.; Antoja, T.; Ramos, P.; Steinmetz, M.; Enke, H. (August 2019), "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18", Astronomy & Astrophysics , 628 : A94,
arXiv :
1904.11302 ,
Bibcode :
2019A&A...628A..94A ,
doi :
10.1051/0004-6361/201935765 ,
ISSN
0004-6361 .
^ Stassun, Keivan G.; et al. (September 2018), "The TESS Input Catalog and Candidate Target List", The Astronomical Journal , 156 (3): 102,
arXiv :
1706.00495 ,
Bibcode :
2018AJ....156..102S ,
doi :
10.3847/1538-3881/aad050 ,
ISSN
0004-6256 .
^
a
b
c Sprague, Dani; et al. (8 March 2022), "APOGEE Net: An Expanded Spectral Model of Both Low-mass and High-mass Stars", The Astronomical Journal , 163 (4): 152,
arXiv :
2201.03661 ,
Bibcode :
2022AJ....163..152S ,
doi :
10.3847/1538-3881/ac4de7 ,
eISSN
1538-3881 ,
ISSN
0004-6256 .
^
"1 Cnc" .
SIMBAD .
Centre de données astronomiques de Strasbourg . Retrieved 2019-02-22 .
^ 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