HD 81101
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| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Carina |
| Right ascension | Template:RA[1] |
| Declination | Template:DEC[1] |
| Apparent magnitude (V) | 4.79[2] |
| Characteristics | |
| Spectral type | G6III[3] |
| B−V Template:Engvar | Template:Val[2] |
| Astrometry | |
| Radial velocity (Rv) | Template:Val[1] km/s |
| Proper motion (μ) | RA: −27.15[1] mas/yr Dec.: −14.18[1] mas/yr |
| Parallax (π) | 14.4946±0.1593 mas[1] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Absolute magnitude (MV) | 0.51[2] |
| Details | |
| Mass | 1.95[4] Template:Solar mass |
| Radius | Template:Val[1] Template:Solar radius |
| Luminosity | Template:Val[1] Template:Solar luminosity |
| Surface gravity (log g) | Template:Val[5] cgs |
| Temperature | Template:Val[1] K |
| Metallicity [Fe/H] | Template:Val[5] dex |
| Age | 2.04[4] Gyr |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| Template:Odlist[6] | |
| Database references | |
| SIMBAD | data |
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HD 81101 is a single[7] star in the southern constellation of Carina. It has the Bayer designation k Carinae, while HD 81101 is the star's designation in the Henry Draper catalogue. The star has a yellow hue and is faintly visible to the naked eye with an apparent visual magnitude of 4.79.[2] It is located at a distance of approximately 225 light years from the Sun based on parallax.[1] This object is drifting further away with a radial velocity of +51 km/s,[1] having come to within Template:Convert of the Sun some 1.4 million years ago.[8]
This is an aging giant star with a stellar classification of G6III,[3] having exhausted the supply of hydrogen at its core then cooled and expanded away from the main sequence. It is two[4] billion years old with 1.95[4] times the mass of the Sun and has expanded to 11[1] times the Sun's radius. The star is radiating 65[1] times the luminosity of the Sun from its swollen photosphere at an effective temperature of 4,908 K.[1] Being a member of the old disk population,[9] the metallicity of the star's stellar atmosphere is much lower than solar.[5]
References
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