Sigma2 Cancri

For other stars with this Bayer designation, see σ Cancri.
Sigma2 Cancri
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Cancer
Right ascension 08h 56m 56.59711s[1]
Declination +32° 54′ 37.5423″[1]
Apparent magnitude (V) +5.436[2]
Characteristics
Spectral type A7 IV[3]
B−V color index +0.157[2]
Astrometry
Radial velocity (Rv)−26.2±0.7[4] km/s
Proper motion (μ) RA: −53.49[1] mas/yr
Dec.: −66.13[1] mas/yr
Parallax (π)16.79 ± 0.29 mas[1]
Distance194 ± 3 ly
(60 ± 1 pc)
Absolute magnitude (MV)+1.57[5]
Details
Mass1.79[6] M☉
Luminosity21.5[3] L☉
Surface gravity (log g)4.17[6] cgs
Temperature8,309±283[6] K
Rotational velocity (v sin i)133[3] km/s
Age441[6] Myr
Other designations
σ2 Cnc, 59 Cancri, BD+33° 1785, HD 76398, HIP 43932, HR 3555, SAO 61146[7]
Database references
SIMBADdata

Sigma2 Cancri, Latinized from σ2 Cancri, is the Bayer designation for a solitary,[8] white-hued star in the constellation Cancer. It is faintly visible to the naked eye, with an apparent visual magnitude of +5.44.[2] Based upon an annual parallax shift of 16.79 mas as seen from Earth,[1] this star is located around 194 light years from the Sun.

With an estimated age of 441[6] million years, this is an A-type subgiant star with a stellar classification of A7 IV.[3] It is spinning relatively rapidly with a projected rotational velocity of 133 K.[3] The star has an estimated 1.8[6] times the mass of the Sun and is radiating 21.5[3] times the Sun's luminosity from its photosphere at an effective temperature of roughly 8,309 K.[6]

  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 Cite error: The named reference Hog2000 was invoked but never defined (see the help page).
  3. ^ a b c d e f Cite error: The named reference Zorec2012 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference deBruijne2012 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  6. ^ a b c d e f g Cite error: The named reference David2015 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).