Mu Capricorni
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Capricornus |
| Right ascension | 21h 53m 17.77054s |
| Declination | −13° 33′ 06.3679″ |
| Apparent magnitude (V) | +5.081 |
| Characteristics | |
| Spectral type | F2 V |
| U−B color index | +0.012 |
| B−V color index | +0.367 |
| Astrometry | |
| Proper motion (μ) | RA: +311.22 mas/yr Dec.: +13.46 mas/yr |
| Parallax (π) | 37.57±0.67 mas |
| Distance | 87 ± 2 ly (26.6 ± 0.5 pc) |
| Absolute magnitude (MV) | +2.96±0.04 |
| Details | |
| Mass | 1.29 M☉ |
| Radius | 1.8 R☉ |
| Surface gravity (log g) | 4.28 cgs |
| Temperature | 6,892±234 K |
| Metallicity [Fe/H] | −0.14 dex |
| Rotational velocity (v sin i) | 69.3±3.5 km/s |
| Age | 1.6±0.3 Gyr |
| Other designations | |
| μ Cap, 51 Cap, BD−14°6149, FK5 1577, Gl 838.5, GJ 9761, HD 207958, HIP 108036, HR 8351, SAO 164713 | |
| Database references | |
| SIMBAD | data |
Mu Capricorni (μ Cap, μ Capricorni) is a solitary star in the southern constellation of Capricornus. Based upon an annual parallax shift of 37.57 mas as seen from the Earth, 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.
It is a yellow-white hued, F-type main sequence star with a stellar classification of F2 V. It is an estimated 1.6 billion years old and is spinning with a projected rotational velocity of 69 km/s. The star has 1.29 times the mass of the Sun and around 1.8 times the Sun's radius, with an effective temperature of 6,892 K.
In Chinese, 哭 (Kū), meaning Crying, refers to an asterism consisting of μ Capricorni and 38 Aquarii. Consequently, the Chinese name for μ Capricorni itself is 哭一 (Kū yī, English: the First Star of Crying.). From this Chinese name, the name Kuh has appeared.