Lambda Piscis Austrini

Lambda Piscis Austrini
Diagram showing star positions and boundaries of the Piscis Austrinus constellation and its surroundings
Location of λ Piscis Austrini (circled)
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]
Distance500 ± 20 ly
(153 ± 5 pc)
Absolute magnitude (MV)−0.13[5]
Details
Mass3.58±0.08[6] M☉
Radius4.2[7] R☉
Luminosity249[6] L☉
Temperature12,023[6] K
Rotational velocity (v sin i)50[8] km/s
Age215[5] Myr
Other designations
λ PsA, 16 Piscis Austrini, CPD−28°7566, FK5 838, HD 210934, HIP 109789, HR 8478, SAO 190985[9]
Database references
SIMBADdata

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]

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]

  1. ^ a b c d e f Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference Corben1968 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference houk1979 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  5. ^ a b c Cite error: The named reference Gontcharov2012 was invoked but never defined (see the help page).
  6. ^ a b c d e Cite error: The named reference Zorec2012 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference PasinettiFracassini2001 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference Abt2002 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).