41 Capricorni
Star in the constellation Capricornus / From Wikipedia, the free encyclopedia
41 Capricorni is a binary star[7] system in the southern constellation of Capricornus. It is faintly visible to the naked eye with an apparent visual magnitude of +5.24.[2] The distance to this star, based upon an annual parallax shift of 19.06±0.29 mas,[1] is around 171 light years. It is moving closer with a heliocentric radial velocity of −45 km/s.[4]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Capricornus |
Right ascension | 21h 28m 43.40070s[1] |
Declination | −21° 48′ 25.8504″[1] |
Apparent magnitude (V) | +5.24[2] |
Characteristics | |
Spectral type | K0 III[3] |
B−V color index | 0.991±0.002[4] |
Astrometry | |
Radial velocity (Rv) | −45.1±1.3[4] km/s |
Proper motion (μ) | RA: +134.83[1] mas/yr Dec.: −5.73[1] mas/yr |
Parallax (π) | 19.06 ± 0.29 mas[1] |
Distance | 171 ± 3 ly (52.5 ± 0.8 pc) |
Absolute magnitude (MV) | 0.99[4] |
Details | |
Mass | 2.55[2] M☉ |
Luminosity | 48.25[4] L☉ |
Surface gravity (log g) | 3.05[5] cgs |
Temperature | 4,910[5] K |
Metallicity [Fe/H] | −0.01[5] dex |
Age | 550[2] Myr |
Other designations | |
Database references | |
SIMBAD | data |
This is a yellow K-type giant star with a stellar classification of K0 III.[3] At the age of around 550[2] million years it has become a red clump star,[8] which indicates it is generating energy via helium fusion at its core. It has an estimated 2.55[2] times the mass of the Sun and is radiating 48[4] times the Sun's luminosity from its photosphere at an effective temperature of 4,910 K.[5] The magnitude 11.5 companion lies at an angular separation of 5.5″, as of 2008.[7]