Xi2 Capricorni
Star in the constellation Capricornus / From Wikipedia, the free encyclopedia
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.
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] |
Distance | 90 ± 1 ly (27.7 ± 0.3 pc) |
Absolute magnitude (MV) | 3.64±0.02[5] |
Details[6] | |
Mass | 1.20+0.01 −0.02 M☉ |
Surface gravity (log g) | 4.25±0.03 cgs |
Temperature | 6,411±63 K |
Metallicity [Fe/H] | −0.25±0.05 dex |
Rotational velocity (v sin i) | 11[2] km/s |
Age | 3.04+0.45 −0.51 Gyr |
Other designations | |
Database references | |
SIMBAD | data |
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]