Sigma Capricorni
Template:Location mark Location of σ Capricorni (circled) | |
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Capricornus |
| Right ascension | Template:RA[1] |
| Declination | Template:DEC[1] |
| Apparent magnitude (V) | +5.31[2] |
| Characteristics | |
| Spectral type | K2 III[3] |
| U−B Template:Engvar | +1.56[2] |
| B−V Template:Engvar | +1.43[2] |
| Astrometry | |
| Radial velocity (Rv) | Template:Val[1] km/s |
| Proper motion (μ) | RA: +8.07[4] mas/yr Dec.: −11.31[4] mas/yr |
| Parallax (π) | 3.0609±0.1194 mas[1] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Absolute magnitude (MV) | −2.38[5] |
| Details | |
| Mass | Template:Val[6] Template:Solar mass |
| Radius | Template:Val[1] Template:Solar radius |
| Luminosity | Template:Val[1] Template:Solar luminosity |
| Temperature | Template:Val[1] K |
| Age | Template:Val[6] Myr |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| Template:Odlist[7] | |
| Database references | |
| SIMBAD | data |
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Sigma Capricorni, Latinized from σ Capricorni, is a solitary[8] star in the southern constellation of Capricornus,[7] 0.5 degree north of the ecliptic. It is visible to the naked eye as a dim, orange-hued star with an apparent visual magnitude of +5.31.[2] The star is about 1,070 light years away from the Sun based on parallax, but is drifting closer with a radial velocity of −9.6 km/s.[1]
This object is an evolved, K-type giant star with a stellar classification of K2 III.[3] Having exhausted the supply of hydrogen at its core, it has expanded and now has around 67.5[1] times the girth of the Sun. The star is about 60.5[6] million years old with 6.3[6] times the mass of the Sun. It is radiating 1,392[1] times the luminosity of the Sun from its swollen photosphere at an effective temperature of 4,292 K.[1]
A magnitude 9.43 visual companion is at an angular separation of Template:Val along a position angle of 179°, as of 2016.[9]
References
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