41 Capricorni
Star in the constellation Capricornus
From Wikipedia, the free encyclopedia
41 Capricorni is a binary star[9] 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.[5]
| Observation data Epoch J2000 Equinox ICRS | |
|---|---|
| Constellation | Capricornus |
| Right ascension | 21h 28m 43.40070s[1] |
| Declination | −21° 48′ 25.8504″[1] |
| Apparent magnitude (V) | +5.24[2] |
| Characteristics | |
| Evolutionary stage | red clump[3] |
| Spectral type | K0 III[4] |
| B−V color index | 0.991±0.002[5] |
| Astrometry | |
| Radial velocity (Rv) | −45.1±1.3[5] 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[5] |
| Details | |
| Mass | 2.55[2] M☉ |
| Radius | 9.8[6] R☉ |
| Luminosity | 48.25[5] L☉ |
| Surface gravity (log g) | 3.05[7] cgs |
| Temperature | 4,910[7] K |
| Metallicity [Fe/H] | −0.01[7] dex |
| Age | 550[2] Myr |
| Other designations | |
| 41 Cap, CD−23°17057, GC 30365, HD 206356, HIP 107128, HR 8285, SAO 190559, ADS 15223, CCDM J21420-2316[8] | |
| Database references | |
| SIMBAD | data |
This is a yellow K-type giant star with a stellar classification of K0 III.[4] At the age of around 550 million years[2] it has become a red clump star,[3] which indicates it is generating energy via helium fusion at its core. It has an estimated 2.55 times the mass of the Sun[2] and is radiating 48 times the Sun's luminosity[5] from its photosphere at an effective temperature of 4,910 K.[7] The magnitude 11.5 companion lies at an angular separation of 5.5″, as of 2008.[9]