Gamma Capricorni
Star in the constellation Capricornus / From Wikipedia, the free encyclopedia
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Gamma Capricorni or γ Capricorni, formally named Nashira (/ˈnæʃɪrə/),[12] is a giant star in the constellation of Capricornus. Based on parallax measurements obtained during the Hipparcos mission, it is located at a distance of approximately 157 light-years from the Sun. The star is drifting closer with a radial velocity of −31 km/s.[6] It is 2.56 degrees south of the ecliptic, so it can be occulted by the Moon, and (rarely) by planets.
Quick Facts Constellation, Right ascension ...
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Capricornus |
Right ascension | 21h 40m 05.45648s[1] |
Declination | −16° 39′ 44.307184″[1] |
Apparent magnitude (V) | +3.67[2] |
Characteristics | |
Spectral type | kF0hF1VmF2[3] |
U−B color index | +0.22[4] |
B−V color index | +0.32[4] |
Variable type | α2 CVn[5] |
Astrometry | |
Radial velocity (Rv) | −31.2±0.5[6] km/s |
Proper motion (μ) | RA: +187.56[1] mas/yr Dec.: −22.45[1] mas/yr |
Parallax (π) | 20.77 ± 0.72 mas[1] |
Distance | 157 ± 5 ly (48 ± 2 pc) |
Absolute magnitude (MV) | +2.60[7] |
Details | |
Mass | 2.44[8] M☉ |
Radius | 2.35[8] R☉ |
Surface gravity (log g) | 3.69[8] cgs |
Temperature | 7,520[9] K |
Metallicity [Fe/H] | +0.5[9] dex |
Rotational velocity (v sin i) | 40[10] km/s |
Other designations | |
Nashira, Gamma Cap, Gam Cap, γ Cap, 40 Capricorni, BD−17°6340, FK5 812, GJ 4209, HD 206088, HIP 106985, HR 8278, SAO 164560[11] | |
Database references | |
SIMBAD | data |
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