12 Cancri

12 Cancri
Observation data
Epoch J2000      Equinox J2000
Constellation Cancer
Right ascension 08h 08m 42.4457s[1]
Declination +13° 38′ 27.307″[1]
Apparent magnitude (V) 6.25[2]
Characteristics
Spectral type F3 V[3]
B−V color index 0.480±0.007[2]
Astrometry
Radial velocity (Rv)−10.0±4.3[4] km/s
Proper motion (μ) RA: +2.776[1] mas/yr
Dec.: −14,723[1] mas/yr
Parallax (π)12.7085 ± 0.1327 mas[1]
Distance257 ± 3 ly
(78.7 ± 0.8 pc)
Absolute magnitude (MV)1.59[5]
Details
Mass1.16[6] M☉
Luminosity17.94[2] L☉
Surface gravity (log g)3.60±0.14[6] cgs
Temperature6,357±88[7] K
Metallicity [Fe/H]0.04[7] dex
Rotational velocity (v sin i)52.3±4.1[5] km/s
Age2.466[6] Gyr
Other designations
12 Cnc, BD+14°1831, HD 67483, HIP 39874, HR 3184, SAO 97594[8]
Database references
SIMBADdata

12 Cancri is a star in the zodiac constellation Cancer. It has an apparent visual magnitude of 6.25,[2] placing just below the normal limit for stars visible to the naked eye in good seeing conditions. The star displays an annual parallax shift of 12.7 mas as seen from Earth's orbit, which places it at a distance of about 257 light-years. It is moving toward the Sun with a radial velocity of around −10 km/s.[4]

This is an ordinary F-type main-sequence star with a stellar classification of F3 V,[3] which indicates it is generating energy through hydrogen fusion at its core. It is spinning with a projected rotational velocity of 52[5] km/s and appears to be undergoing solar-like differential rotation with relative rate of α = 0.33±0.13.[9] The star is about 2.5[6] billion years old with 1.16[6] times the mass of the Sun and is radiating nearly 18[2] times the Sun's luminosity from its photosphere at an effective temperature of around 6,357 K.[7]

  1. ^ a b c d e Cite error: The named reference dr3 was invoked but never defined (see the help page).
  2. ^ a b c d e Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Balachandran1990 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference deBruijne2012 was invoked but never defined (see the help page).
  5. ^ a b c Cite error: The named reference vonEiff2012 was invoked but never defined (see the help page).
  6. ^ a b c d e Cite error: The named reference David2015 was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference Casagrande2011 was invoked but never defined (see the help page).
  8. ^ "12 Cnc". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-02-09.
  9. ^ Cite error: The named reference Reiners2003 was invoked but never defined (see the help page).