| absmag_v = +0.81[11]
}}{{Starbox detail
| source = [7]
| mass = {{Val|2.42|0.09}}
| radius = {{Val|7.76|0.51}}
| luminosity = 40
| temperature = 5,153
| gravity = 3.21
| metal_fe = −0.06
| rotational_velocity = {{Val|1.95|0.45}}
| age_myr = {{Val|620|60}}
}}{{Starbox catalog
| names = {{odlist | B=τ Cnc | F=72 Cancri | FK5=2719 | BD=+30° 1817 | HD=78235 | HIP=44818 | HR=3621 | SAO=80650 }}[13]
}}{{Starbox reference
| Simbad = tau+Cnc
}}{{starbox end}}Tau Cancri (τ Cancri) is a solitary,[4] yellow-hued star in the zodiac constellation of Cancer. With an apparent visual magnitude of +5.42,[3] it is faintly visible to the naked eye. Based upon an annual parallax shift of 11.92 mas as seen from Earth,[ it is located around 274 light years from the Sun.]
With an age of about 620[7] million years and a stellar classification of G8 III,[4] this is a red clump giant star,[19] which indicates that it has evolved onto the horizontal branch and is generating energy through helium fusion at its core. It is a microvariable, showing a luminosity variation of 0.04 in magnitude.[20] Tau Cancri has an estimated 2.4 times the mass of the Sun and 7.8 times the Sun's radius. The star radiates 40 times the solar luminosity from its photosphere at an effective temperature of 5,153 K.[7]
References
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3. ^1 {{citation | last1=Adelman | first1=Saul J. | title=On the Photometric Variability of Red Clump Giants | journal=Baltic Astronomy | volume=10 | pages=593–597 | year=2001 | bibcode=2001BaltA..10..593A | postscript=. }}
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5. ^1 2 3 4 {{citation | last1=Jofré | first1=E. | last2=Petrucci | first2=R. | last3=Saffe | first3=C. | last4=Saker | first4=L. | last5=Artur de la Villarmois | first5=E. | last6=Chavero | first6=C. | last7=Gómez | first7=M. | last8=Mauas | first8=P. J. D. | title=Stellar parameters and chemical abundances of 223 evolved stars with and without planets | journal=Astronomy & Astrophysics | display-authors=1 | volume=574 | pages=A50 | year=2015 | arxiv=1410.6422 | bibcode=2015A&A...574A..50J | doi=10.1051/0004-6361/201424474 | postscript=. }}
6. ^1 2 3 4 {{citation | last1=Argue | first1=A. N. | title=UBV photometry of 300 G and K type stars | journal=Monthly Notices of the Royal Astronomical Society | volume=125 | issue=6 | pages=557 | year=1963 | bibcode=1963MNRAS.125..557A | doi=10.1093/mnras/125.6.557}}
7. ^1 {{cite simbad | title=tau Cnc | accessdate=2017-06-11 | postscript=. }}