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Star in the constellation Cancer
Mu2 Cancri is a solitary,
[10] yellow-hued
star in the
zodiac
constellation of
Cancer . It is visible to the naked eye with an
apparent visual magnitude of +5.30.
[2] Based upon an annual
parallax shift of 42.36
mas as seen from Earth,
[1] this star is located 77
light-years from the
Sun . It is drifting closer with a
radial velocity of −36 km/s
[5] and will make its closest approach in about 611,100 years when it passes at a distance of 16.8 light-years (5.2
parsecs ).
[11]
At the estimated age of 5.6 billion years,
[7] Mu2 Cancri is an
evolving
G-type
subgiant star
[3] with a
stellar classification of G2 IV.
[4] It has 1.2
[7] times the
mass of the Sun and 1.8
[8] times the
Sun's radius . Mu2 Cancri has relatively high
metallicity —what astronomers term the abundance of elements other than hydrogen and helium—having a 29% higher abundance compared to the Sun.
[7] It is radiating 3.78
[1] times the
Sun's luminosity at an
effective temperature of 5,809
K .
[7] The star is spinning at a leisurely
projected rotational velocity of 3.7 km/s.
[6]
References
^
a
b
c
d
e
f
g
h
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
c
d Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory , 4 (99): 99,
Bibcode :
1966CoLPL...4...99J .
^
a
b Abt, Helmut A. (May 2019), "The Evolutionary Status of GK Subgiants", The Astronomical Journal , 157 (5): 5,
Bibcode :
2019AJ....157..177A ,
doi :
10.3847/1538-3881/ab11c6 , 177.
^
a
b Gray, R. O.; et al. (July 2006), "Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 parsecs: The Northern Sample I", The Astronomical Journal , 132 (1): 161–170,
arXiv :
astro-ph/0603770 ,
Bibcode :
2006AJ....132..161G ,
doi :
10.1086/504637 ,
S2CID
119476992 .
^
a
b 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.
^
a
b
c Ammler-von Eiff, Matthias; Reiners, Ansgar (June 2012), "New measurements of rotation and differential rotation in A-F stars: are there two populations of differentially rotating stars?", Astronomy & Astrophysics , 542 : A116,
arXiv :
1204.2459 ,
Bibcode :
2012A&A...542A.116A ,
doi :
10.1051/0004-6361/201118724 ,
S2CID
53666672 .
^
a
b
c
d
e
f
g
h
i Ramírez, I.; et al. (February 2013), "Oxygen abundances in nearby FGK stars and the galactic chemical evolution of the local disk and halo", The Astrophysical Journal , 764 (1): 78,
arXiv :
1301.1582 ,
Bibcode :
2013ApJ...764...78R ,
doi :
10.1088/0004-637X/764/1/78 ,
S2CID
118751608 .
^
a
b Takeda, Genya; et al. (February 2007), "Structure and Evolution of Nearby Stars with Planets. II. Physical Properties of ~1000 Cool Stars from the SPOCS Catalog", The Astrophysical Journal Supplement Series , 168 (2): 297–318,
arXiv :
astro-ph/0607235 ,
Bibcode :
2007ApJS..168..297T ,
doi :
10.1086/509763 ,
S2CID
18775378 .
^
"mu.02 Cnc" ,
SIMBAD ,
Centre de données astronomiques de Strasbourg , retrieved 2017-06-17 .
^ 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 .
^ Bailer-Jones, C.A.L.; et al. (2018), "New stellar encounters discovered in the second Gaia data release", Astronomy & Astrophysics , 616 : A37,
arXiv :
1805.07581 ,
Bibcode :
2018A&A...616A..37B ,
doi :
10.1051/0004-6361/201833456 ,
S2CID
56269929 .