Sigma1 Cancri

For other stars with this Bayer designation, see σ Cancri.
Sigma1 Cancri
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Cancer
Right ascension 08h 52m 34.62123s[1]
Declination +32° 28′ 26.9664″[1]
Apparent magnitude (V) +5.68[2]
Characteristics
Spectral type A8 Vas[3]
U−B color index +0.08[2]
B−V color index +0.20[2]
Astrometry
Radial velocity (Rv)−13.5±4.3[4] km/s
Proper motion (μ) RA: −4.41[1] mas/yr
Dec.: +13.95[1] mas/yr
Parallax (π)15.51 ± 0.41 mas[1]
Distance210 ± 6 ly
(64 ± 2 pc)
Absolute magnitude (MV)+1.62[5]
Details
Mass1.70[6] M☉
Luminosity18[7] L☉
Surface gravity (log g)4.44[6] cgs
Temperature8,116±276[6] K
Rotational velocity (v sin i)84[7] km/s
Age301[6] Myr
Other designations
σ1 Cnc, 51 Cancri, BD+33° 1770, HD 75698, HIP 43584, HR 3519, SAO 61102[8]
Database references
SIMBADdata

Sigma1 Cancri, Latinized from σ1 Cancri, is a solitary,[9] white-hued star in the zodiac constellation of Cancer. It is faintly visible to the naked eye, with an apparent visual magnitude of +5.68.[2] Based upon an annual parallax shift of 15.51 mas as seen from Earth,[1] this star is located around 210 light years from the Sun.

This is a chemically peculiar[7] A-type main sequence star with a stellar classification of A8 Vas.[3] At an age of about 301[6] million years, Sigma1 Cancri is around 67% of the way through its main sequence lifespan.[7] The star has 1.7[6] times the mass of the Sun and is radiating 18[7] times the Sun's luminosity from its photosphere at an effective temperature of 8,116 K.[6] It has a magnitude 13.3 visual companion at an angular separation of 5.2 arc seconds along a position angle of 276°, as of 2011.[10]

  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 Barry1970 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. ^ a b c d e Cite error: The named reference Zorec2012 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference WDSC2014 was invoked but never defined (see the help page).