Sigma3 Cancri

For other stars with this Bayer designation, see σ Cancri.
Sigma3 Cancri
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Cancer
Right ascension 08h 59m 32.65432s[1]
Declination +32° 25′ 06.8093″[1]
Apparent magnitude (V) +5.24[2]
Characteristics
Spectral type G9 III[3]
U−B color index +0.64[2]
B−V color index +0.91[2]
Astrometry
Radial velocity (Rv)+20.82±0.21[4] km/s
Proper motion (μ) RA: −43.78[1] mas/yr
Dec.: −35.03[1] mas/yr
Parallax (π)11.03 ± 0.28 mas[1]
Distance296 ± 8 ly
(91 ± 2 pc)
Absolute magnitude (MV)0.45[5]
Details[4]
Mass2.81±0.11 M☉
Radius10.32 R☉
Luminosity72 L☉
Surface gravity (log g)3.18 cgs
Temperature5,170±21 K
Metallicity [Fe/H]−0.03±0.06 dex
Rotational velocity (v sin i)2.30±0.47 km/s
Age420±40 Myr
Other designations
σ3 Cnc, 64 Cancri, BD+32° 1821, FK5 1232, HD 76813, HIP 44154, HR 3575, SAO 61177[6]
Database references
SIMBADdata

Sigma3 Cancri (σ3 Cancri) is a solitary,[7] yellow-hued star in the zodiac constellation of Cancer. With an apparent visual magnitude of +5.24,[2] it is a dim star that is visible to the naked eye. Based upon an annual parallax shift of 11.03 mas as seen from Earth,[1] it is located around 296 light years from the Sun. The star's proper motion makes it a candidate for membership in the IC 2391 supercluster.[8]

This is an evolved, G-type giant star with a stellar classification of G9 III.[3] At the estimated age of 420[4] million years it is a red clump star on the horizontal branch, which indicates it is generating energy through helium fusion at its core.[9] Sigma3 Cancri has 2.8 times the mass of the Sun and has expanded to 10.3 times the Sun's radius. It is radiating 72 times the solar luminosity from its photosphere at an effective temperature of 5,170 K.[4]

  1. ^ a b c d e f Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Guetter1984 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference sato1990 was invoked but never defined (see the help page).
  4. ^ a b c d Cite error: The named reference Jofre2015 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference DaSilva2015 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Eggen1995 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Mishenina2006 was invoked but never defined (see the help page).