36 Capricorni
Star in the constellation Capricornus / From Wikipedia, the free encyclopedia
36 Capricorni is a single,[9] yellow-hued star in the southern constellation of Capricornus. It is visible to the naked eye with an apparent visual magnitude of +4.50.[2] The distance to this star, as determined from an annual parallax shift of 19.06±0.29 mas,[1] is around 171 light years. It is currently moving closer with a heliocentric radial velocity of −21 km/s, and will come within 145 ly (44.58 pc) in about 685,000 years ago.[5]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Capricornus |
Right ascension | 21h 28m 43.40070s[1] |
Declination | −21° 48′ 25.8504″[1] |
Apparent magnitude (V) | +4.50[2] |
Characteristics | |
Spectral type | G7IIIb Fe–1[3] |
B−V color index | 0.90[4] |
Astrometry | |
Radial velocity (Rv) | −20.8±0.9[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) | 0.811[6] |
Details | |
Mass | 1.94[4] M☉ |
Luminosity | 44.7[4] L☉ |
Surface gravity (log g) | 2.76±0.16[7] cgs |
Temperature | 5,017±18[4] K |
Metallicity [Fe/H] | −0.09±0.07[7] dex |
Age | 2.42[4] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
This is an evolved G-type giant star with a stellar classification of G7IIIb Fe–1,[3] where the suffix notation indicates an underabundance of iron found in the spectrum. At the age of 2.4 billion years it has become a red clump giant, meaning it is generating energy through helium fusion at its core.[6] It has an estimated 1.94[4] times the mass of the Sun and is radiating 44.7[4] times the Sun's luminosity from its photosphere at an effective temperature of 5,017 K.[4]