Gamma Capricorni
Gamma Capricorni or γ Capricorni, formally named Nashira (/ˈnæʃɪrə/), 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. It is 2.56 degrees south of the ecliptic, so it can be occulted by the Moon, and (rarely) by planets.
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Capricornus |
| Right ascension | 21h 40m 05.45648s |
| Declination | −16° 39′ 44.307184″ |
| Apparent magnitude (V) | +3.67 |
| Characteristics | |
| Spectral type | kF0hF1VmF2 |
| U−B color index | +0.22 |
| B−V color index | +0.32 |
| Variable type | α2 CVn |
| Astrometry | |
| Radial velocity (Rv) | −31.2±0.5 km/s |
| Proper motion (μ) | RA: +187.56 mas/yr Dec.: −22.45 mas/yr |
| Parallax (π) | 20.77 ± 0.72 mas |
| Distance | 157 ± 5 ly (48 ± 2 pc) |
| Absolute magnitude (MV) | +2.60 |
| Details | |
| Mass | 2.44 M☉ |
| Radius | 2.35 R☉ |
| Surface gravity (log g) | 3.69 cgs |
| Temperature | 7,520 K |
| Metallicity [Fe/H] | +0.5 dex |
| Rotational velocity (v sin i) | 40 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 | |
| Database references | |
| SIMBAD | data |
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