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Star in the constellation Capricornus From Wikipedia, the free encyclopedia
Kappa Capricorni (κ Cap, κ Capricorni) is a solitary[9] star in the constellation Capricornus. It is visible to the naked eye with an apparent visual magnitude of +4.73.[2] Based upon an annual parallax shift of 11.09 mas as seen from the Earth,[1] the star is located about 294 light years from the Sun.
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Capricornus |
Right ascension | 21h 42m 39.50710s[1] |
Declination | −18° 51′ 58.7669″[1] |
Apparent magnitude (V) | +4.73[2] |
Characteristics | |
Spectral type | G8 III[3] |
U−B color index | +0.51[2] |
B−V color index | +0.88[2] |
Astrometry | |
Radial velocity (Rv) | −2.87±0.18[4] km/s |
Proper motion (μ) | RA: +145.85[1] mas/yr Dec.: −9.50[1] mas/yr |
Parallax (π) | 11.09 ± 0.28 mas[1] |
Distance | 294 ± 7 ly (90 ± 2 pc) |
Absolute magnitude (MV) | −0.023[5] |
Details[6] | |
Mass | 2.43±0.21 M☉ |
Radius | 13.28±0.47 R☉ |
Luminosity | 106.8±5.9 L☉ |
Surface gravity (log g) | 2.59±0.06 cgs |
Temperature | 5,096±57 K |
Metallicity [Fe/H] | −0.39±0.10 dex |
Rotational velocity (v sin i) | 0.0[4] km/s |
Age | 1.19[7] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
This is a yellow-hued, evolved, G-type giant star with a stellar classification of G8 III.[3] There is a 91% probability that it is currently on the horizontal branch, rather than the red giant branch.[6] As such, it is a red clump[10] giant with an estimated 2.43 times the mass of the Sun and has expanded to 13.28 times the radius of the Sun.[6] The star is about 1.2[7] billion years old and has a projected rotational velocity that is too small to be measured.[4] It radiates 107 times the solar luminosity from its photosphere at an effective temperature of 5,096 K.[6]
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