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Lambda Piscis Austrini
Star in the constellation Piscis Austrinus / From Wikipedia, the free encyclopedia
Lambda Piscis Austrini, Latinized from λ Piscis Austrini, is a solitary[10] star in the southern constellation of Piscis Austrinus. It has a blue-white hue and is visible to the naked eye with an apparent visual magnitude of +5.42.[2] Based upon an annual parallax shift of 6.51 mas as measured from Earth,[1] it is located around 500 light years from the Sun. At that distance, the visual magnitude of the star is diminished by an extinction factor of 0.16 due to interstellar dust.[5]
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Piscis Austrinus |
Right ascension | 22h 14m 18.75029s[1] |
Declination | −27° 46′ 00.8756″[1] |
Apparent magnitude (V) | +5.42[2] |
Characteristics | |
Spectral type | B7 V[3] |
B−V color index | −0.12[2] |
Astrometry | |
Radial velocity (Rv) | −6.20[4] km/s |
Proper motion (μ) | RA: +23.889[1] mas/yr Dec.: +2.562[1] mas/yr |
Parallax (π) | 6.5148 ± 0.2222 mas[1] |
Distance | 500 ± 20 ly (153 ± 5 pc) |
Absolute magnitude (MV) | −0.13[5] |
Details | |
Mass | 3.58±0.08[6] M☉ |
Radius | 4.2[7] R☉ |
Luminosity | 249[6] L☉ |
Temperature | 12,023[6] K |
Rotational velocity (v sin i) | 50[8] km/s |
Age | 215[5] Myr |
Other designations | |
Database references | |
SIMBAD | data |
This is a B-type main sequence star with a stellar classification of B7 V.[3] It has an estimated 3.58[6] times the mass of the Sun and about 4.2[7] times the Sun's radius. The star is spinning with a projected rotational velocity of 50 km/s[8] and is 76% of the way through its main sequence lifetime. It is radiating 249 times the solar luminosity from its photosphere at an effective temperature of 12,023 K.[6]
Lambda Piscis Austrini is moving through the Galaxy at a speed of 18.1 km/s relative to the Sun. Its projected Galactic orbit carries it between 23,800 and 29,300 light years from the center of the Galaxy.[11]