Mu Capricorni
Star in the constellation Capricornus / From Wikipedia, the free encyclopedia
Mu Capricorni (μ Cap, μ Capricorni) is a solitary[9] star in the southern constellation of Capricornus. Based upon an annual parallax shift of 37.57 mas as seen from the Earth,[1] the star is located about 87 light years from the Sun. It is visible to the naked eye with an apparent visual magnitude of +5.081.[2]
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Capricornus |
Right ascension | 21h 53m 17.77054s[1] |
Declination | −13° 33′ 06.3679″[1] |
Apparent magnitude (V) | +5.081[2] |
Characteristics | |
Spectral type | F2 V[3] |
U−B color index | +0.012[2] |
B−V color index | +0.367[2] |
Astrometry | |
Proper motion (μ) | RA: +311.22[1] mas/yr Dec.: +13.46[1] mas/yr |
Parallax (π) | 37.57 ± 0.67 mas[1] |
Distance | 87 ± 2 ly (26.6 ± 0.5 pc) |
Absolute magnitude (MV) | +2.96±0.04[4] |
Details | |
Mass | 1.29[5] M☉ |
Radius | 1.8[6] R☉ |
Surface gravity (log g) | 4.28[5] cgs |
Temperature | 6,892±234[5] K |
Metallicity [Fe/H] | −0.14[4] dex |
Rotational velocity (v sin i) | 69.3±3.5[7] km/s |
Age | 1.6±0.3[4] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
It is a yellow-white hued, F-type main sequence star with a stellar classification of F2 V.[3] It is an estimated 1.6[4] billion years old and is spinning with a projected rotational velocity of 69 km/s.[7] The star has 1.29[5] times the mass of the Sun and around 1.8[6] times the Sun's radius, with an effective temperature of 6,892 K.[5]
In Chinese, 哭 (Kū), meaning Crying, refers to an asterism consisting of μ Capricorni and 38 Aquarii.[10] Consequently, the Chinese name for μ Capricorni itself is 哭一 (Kū yī, English: the First Star of Crying.).[11] From this Chinese name, the name Kuh has appeared.[12]