Xi2 Capricorni

For other stars with this Bayer designation, see ξ Capricorni.
Xi2 Capricorni
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Capricornus
Right ascension 20h 12m 25.87020s[1]
Declination −12° 37′ 02.9967″[1]
Apparent magnitude (V) +5.83[2]
Characteristics
Spectral type F7 V Fe−0.5[3]
B−V color index +0.46[2]
Astrometry
Radial velocity (Rv)+27.1[4] km/s
Proper motion (μ) RA: +192.35[1] mas/yr
Dec.: −196.20[1] mas/yr
Parallax (π)36.10 ± 0.41 mas[1]
Distance90 ± 1 ly
(27.7 ± 0.3 pc)
Absolute magnitude (MV)3.64±0.02[5]
Details[6]
Mass1.20+0.01
−0.02 M☉
Surface gravity (log g)4.25±0.03 cgs
Temperature6,411±63 K
Metallicity [Fe/H]−0.25±0.05 dex
Rotational velocity (v sin i)11[2] km/s
Age3.04+0.45
−0.51 Gyr
Other designations
ξ2 Cap, 2 Cap, BD−13° 5608, GC 28035, GJ 4139, HD 191862, HIP 99572, HR 7715, SAO 163337, CCDM J20124-1237, WDS J20124-1237A[7]
Database references
SIMBADdata

Xi2 Capricorni (ξ2 Capricorni) is a yellow-white hued star in the southern constellation of Capricornus. It is dimly visible to the naked eye on a dark night, having an apparent visual magnitude of +5.83.[2] Based upon an annual parallax shift of 36.10 mas as seen from Earth,[1] this system is located 90 light years from the Sun.

This is an F-type main-sequence star with a stellar classification of F7 V Fe−0.5,[3] where the suffix notation indicates the spectrum displays a mild underabundance of iron. It is around three billion years old with 1.2 times the mass of the Sun.[6] Although considered a single star,[8] there is reason to suspect it forms a wide physical pair with the visual magnitude 10.94[9] red dwarf star LP 754–50.[10] They have a projected separation of (28.3±0.3)×103 AU, with LP 754–50 having an estimated 0.55 times the mass of the Sun. If they are gravitationally bound, their orbital period would be around 3.7 million years.[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 Mizusaw2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Gray2006 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Nordstroem2004 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Holmberg2009 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Ramirez2012 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).
  9. ^ Cite error: The named reference SIMBAD2 was invoked but never defined (see the help page).
  10. ^ a b Cite error: The named reference Caballero2009 was invoked but never defined (see the help page).