Chi Capricorni
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) |
|
|---|---|
| Constellation | Capricornus |
| Right ascension | 21h 08m 33.62529s |
| Declination | −21° 11′ 37.2177″ |
| Apparent magnitude (V) | +5.28 |
| Characteristics | |
| Spectral type | A0 V |
| B−V color index | +0.01 |
| Astrometry | |
| Proper motion (μ) |
RA: +19.83 mas/yr Dec.: −60.15 mas/yr |
| Parallax (π) | 18.14 ± 0.31mas |
| Distance | 180 ± 3 ly (55.1 ± 0.9 pc) |
| Absolute magnitude (MV) | +1.59 |
| Details | |
| Mass | 2.78 M☉ |
| Luminosity | 21 L☉ |
| Surface gravity (log g) | 4.33±0.14 cgs |
| Temperature | 10,878±370 K |
| Metallicity [Fe/H] | −0.41±0.06 dex |
| Rotational velocity (v sin i) | 212 km/s |
| Age | 251 Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Chi Capricorni, Latinized from χ Capricorni, is a star in the southern constellation of Capricornus. Based upon an annual parallax shift of 18.14 mas as seen from the Earth, the star is located about 180 light years from the Sun. It is visible to the naked eye with an apparent visual magnitude of +5.28.
This is an A-type main sequence star with a stellar classification of A0 V. It is a candidate Lambda Boötis star, showing a chemically peculiar spectrum with a low abundance of most elements heavier than oxygen. The star is around 251 million years old and is spinning rapidly with a projected rotational velocity of 212 km/s. It has 2.78 times the mass of the Sun and is radiating 21 times the solar luminosity from its photosphere at an effective temperature of 10,878 K.
At an angular separation of 1,199 arcseconds lies a faint proper motion companion designated HIP 99550. At the estimated distance of Chi Capricorni, this is equal to a projected separation of 28,300 AU. It has a visual magnitude of 10.94 and a classification of M0 Vk, indicating this is a red dwarf star.
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