Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Caelum |
Right ascension | 04h 42m 03.48029s[1] |
Declination | −37° 08′ 39.4641″[1] |
Apparent magnitude (V) | 5.04[2] |
Characteristics | |
Spectral type | F3 V[3] or F3 IV[4] |
U−B color index | +0.01[2] |
B−V color index | +0.38[2] |
Astrometry | |
Radial velocity (Rv) | 28.8±0.8[4] km/s |
Proper motion (μ) | RA: +46.59[1] mas/yr Dec.: +193.56[1] mas/yr |
Parallax (π) | 34.88 ± 0.42 mas[1] |
Distance | 94 ± 1 ly (28.7 ± 0.3 pc) |
Absolute magnitude (MV) | +2.64[5] |
Details | |
Mass | 1.32[6] M☉ |
Radius | 1.3[7] R☉ |
Surface gravity (log g) | 4.09[6] cgs |
Temperature | 6,763±230[6] K |
Metallicity [Fe/H] | −0.12[3] dex |
Rotational velocity (v sin i) | 97.5±4.9[5] km/s |
Age | 1.753[6] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
Beta Caeli (β Caeli, abbreviated to β Cae) is the Bayer designation for a star in the southern constellation of Caelum. It is a dim star but visible to the naked eye, having an apparent visual magnitude of 5.04.[2] Based upon an annual parallax shift of 4.88 mas as seen from Earth,[1] it is located 94 light years from the Sun. The star is moving away from the Sun with a radial velocity of +28.8 km/s.[4]
This is a probable single-lined spectroscopic binary star system.[9] The visible component has a stellar classification of F3 V[3] or F3 IV,[4] indicating it is either an F-type main-sequence star or a somewhat more evolved subgiant star, respectively. It has an estimated 1.3[6] times the mass of the Sun and about 1.3[7] times the Sun's radius. The star is 1.75[6] billion years old and has a high rate of spin with a projected rotational velocity of around 97.5 km/s.[5]
The companion is likely to be a low-mass (0.2 M☉) star orbiting about 5 AU from the primary.[10] This object may be the source of the X-ray emission coming from the same location.[9]