Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Centaurus |
Right ascension | 13h 03m 33.30528s [1] |
Declination | −49° 31′ 38.1518″ [1] |
Apparent magnitude (V) | +4.83 [2] |
Characteristics | |
Spectral type | A0 V [3] |
U−B color index | +0.014 [2] |
B−V color index | +0.030 [2] |
Astrometry | |
Radial velocity (Rv) | 0.00±3.70 [4] km/s |
Proper motion (μ) |
RA: −47.55
[1]
mas/
yr Dec.: −11.52 [1] mas/ yr |
Parallax (π) | 14.79 ± 0.27 mas [1] |
Distance | 221 ± 4
ly (68 ± 1 pc) |
Absolute magnitude (MV) | +0.68 [5] |
Details [6] | |
Mass | 2.39 M☉ |
Radius | 2.7 [7] R☉ |
Luminosity | 43.2 [8] L☉ |
Surface gravity (log g) | 4.11±0.14 cgs |
Temperature | 10,462±356 K |
Rotational velocity (v sin i) | 185 [9] km/s |
Age | 125 Myr |
Other designations | |
Database references | |
SIMBAD | data |
Xi1 Centauri, Latinized from ξ1 Centauri, is a solitary [11] star in the southern constellation of Centaurus. It is visible to the naked eye with an apparent visual magnitude of +4.83. [2] With an annual parallax shift of 14.79 mas, [1] it is located around 221 light years from the Sun. At that distance, the apparent visual magnitude of the star is diminished by an interstellar extinction factor of 0.10 [12] due to intervening dust. Just 17 arc minutes to the east of Xi1 Centauri lies the galaxy NGC 4945. [13]
This is an A-type main sequence star with a stellar classification of A0 V. [3] It is about 125 [6] million years old with a relatively high rate of spin, having a projected rotational velocity of 185 km/s. [9] The star has an estimated 2.4 [6] times the mass of the Sun and about 2.7 [7] times the Sun's radius. It is radiating 43 [8] times the solar luminosity from its outer atmosphere at an effective temperature of 10,462 K. [6]
Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Centaurus |
Right ascension | 13h 03m 33.30528s [1] |
Declination | −49° 31′ 38.1518″ [1] |
Apparent magnitude (V) | +4.83 [2] |
Characteristics | |
Spectral type | A0 V [3] |
U−B color index | +0.014 [2] |
B−V color index | +0.030 [2] |
Astrometry | |
Radial velocity (Rv) | 0.00±3.70 [4] km/s |
Proper motion (μ) |
RA: −47.55
[1]
mas/
yr Dec.: −11.52 [1] mas/ yr |
Parallax (π) | 14.79 ± 0.27 mas [1] |
Distance | 221 ± 4
ly (68 ± 1 pc) |
Absolute magnitude (MV) | +0.68 [5] |
Details [6] | |
Mass | 2.39 M☉ |
Radius | 2.7 [7] R☉ |
Luminosity | 43.2 [8] L☉ |
Surface gravity (log g) | 4.11±0.14 cgs |
Temperature | 10,462±356 K |
Rotational velocity (v sin i) | 185 [9] km/s |
Age | 125 Myr |
Other designations | |
Database references | |
SIMBAD | data |
Xi1 Centauri, Latinized from ξ1 Centauri, is a solitary [11] star in the southern constellation of Centaurus. It is visible to the naked eye with an apparent visual magnitude of +4.83. [2] With an annual parallax shift of 14.79 mas, [1] it is located around 221 light years from the Sun. At that distance, the apparent visual magnitude of the star is diminished by an interstellar extinction factor of 0.10 [12] due to intervening dust. Just 17 arc minutes to the east of Xi1 Centauri lies the galaxy NGC 4945. [13]
This is an A-type main sequence star with a stellar classification of A0 V. [3] It is about 125 [6] million years old with a relatively high rate of spin, having a projected rotational velocity of 185 km/s. [9] The star has an estimated 2.4 [6] times the mass of the Sun and about 2.7 [7] times the Sun's radius. It is radiating 43 [8] times the solar luminosity from its outer atmosphere at an effective temperature of 10,462 K. [6]