| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Capricornus |
| Right ascension | 21h53m 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 | |
μ Cap, 51 Cap, BD−14° 6149, FK5 1577, Gl 838.5, HD 207958, HIP 108036, HR 8351, SAO 164713[8] | |
| Database references | |
| SIMBAD | data |
Mu Capricorni (μ Cap, μ Capricorni) is a solitary[9] star in the southern constellationofCapricornus. 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]
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]
InChinese, 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]
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