[ the star is located 143 light years from the Sun. These coordinates are a source of X-ray emission with a luminosity of {{Val|88.5e20|ul=W}}, which is most likely coming from a source other than the A-type stars.[27]]Oblak (1978) identified this as a triple star system,[4] although subsequent sources list it as a binary.[6][7] The magnitude 4.29[4] primary, component A, is a white-hued A-type main sequence star with a stellar classification of A1 V.[5] It has an estimated 2.3[14] times the mass of the Sun and 2.1[16] times the Sun's radius. The star is radiating 37[14] times the solar luminosity from its photosphere at an effective temperature of 9,638 K.[16] There is evidence for an infrared excess, indicating the presence of an orbiting debris disk. This has an estimated temperature of 188 K, indicating an orbital distance of 12 AU from the host star.[16] The magnitude 7.8 secondary, component B, has a class of A2 V and lies at an angular separation of 30.3 arc seconds.[6][7]
Beta Piscis Austrini is moving through the Galaxy at a speed of 14.4 km/s relative to the Sun. Its projected Galactic orbit carries it between 23,900 and 28,300 light years from the center of the Galaxy.[1]{{Unreliable source?|date=May 2017}}
With Delta and Zeta it constituted Tien Kang ("heavenly rope") in China.[41][2]
References
1. ^Beta Piscis Austrini (HIP 111188){{dead link|date=October 2016 |bot=InternetArchiveBot |fix-attempted=yes }}
2. ^Tien Kang was possibly derived from {{lang|zh|天綱}} ({{lang|zh-Latn|Tiān Gāng}}) meaning Materials for Making Tents. AEEA opinion is, δ Piscis Austrini marking itself and stand alone in this asterism. See {{zh icon}} AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 6 日.
3. ^1 2 3 {{citation | title=uvbybeta photometry of wide visual double stars with B, A and F spectral type - I. | last1=Oblak | first1=E. | journal=Astronomy and Astrophysics Supplement Series | volume=34 | pages=453–475 | date=December 1978 | bibcode=1978A&AS...34..453O | postscript=. }}
4. ^1 2 3 4 {{citation | display-authors=1 | last1=Rodriguez | first1=David R. | last2=Duchêne | first2=Gaspard | last3=Tom | first3=Henry | last4=Kennedy | first4=Grant M. | last5=Matthews | first5=Brenda | last6=Greaves | first6=Jane | last7=Butner | first7=Harold | title=Stellar multiplicity and debris discs: an unbiased sample | journal=Monthly Notices of the Royal Astronomical Society | volume=449 | issue=3 | pages=3160–3170 | date=May 2015 | doi=10.1093/mnras/stv483 | arxiv=1503.01320 | bibcode=2015MNRAS.449.3160R | postscript=. }}
5. ^1 {{citation | last1=Gontcharov | first1=G. A. | title=Pulkovo Compilation of Radial Velocities for 35495 Hipparcos stars in a common system | journal=Astronomy Letters | postscript=. | volume=32| issue=11| pages=759–771| date=November 2006 | doi = 10.1134/S1063773706110065| bibcode=2006AstL...32..759G |arxiv = 1606.08053 }}
6. ^1 {{citation | title=X-ray emission from A-type stars | last1=Schröder | first1=C. | last2=Schmitt | first2=J. H. M. M. | journal=Astronomy and Astrophysics | postscript=. | volume=475 | issue=2 | pages=677–684 | date=November 2007 | doi=10.1051/0004-6361:20077429 | bibcode=2007A&A...475..677S }}
7. ^1 2 3 4 5 6 7 {{citation | display-authors=1 | last1=Gerbaldi | first1=M. | last2=Faraggiana | first2=R. | last3=Burnage | first3=R. | last4=Delmas | first4=F. | last5=Gómez | first5=A. E. | last6=Grenier | first6=S. | title=Search for reference A0 dwarf stars: Masses and luminosities revisited with HIPPARCOS parallaxes | journal=Astronomy and Astrophysics Supplement | postscript=. | volume=137 | issue=2 | pages=273–292 |date=June 1999 | doi=10.1051/aas:1999248 | bibcode=1999A&AS..137..273G }}
8. ^1 2 3 4 5 {{citation | title=A Sensitive Identification of Warm Debris Disks in the Solar Neighborhood through Precise Calibration of Saturated WISE Photometry | display-authors=1 | last1=Patel | first1=Rahul I. | last2=Metchev | first2=Stanimir A. | last3=Heinze | first3=Aren | journal=The Astrophysical Journal Supplement Series | postscript=. | volume=212 | issue=1 | id=10 | pages=23 | date=May 2014 | doi=10.1088/0067-0049/212/1/10 | bibcode=2014ApJS..212...10P |arxiv = 1403.3435 }}
9. ^1 2 3 4 {{citation | last1=Eggleton | first1=P. P. | last2=Tokovinin | first2=A. A. | title=A catalogue of multiplicity among bright stellar systems | journal=Monthly Notices of the Royal Astronomical Society | volume=389 | issue=2 | pages=869–879 | date=September 2008 | doi=10.1111/j.1365-2966.2008.13596.x | bibcode=2008MNRAS.389..869E | arxiv=0806.2878 | postscript=. }}
10. ^1 2 3 {{citation | display-authors=1 | last1=Royer | first1=F. | last2=Zorec | first2=J. | last3=Gómez | first3=A. E. | title=Rotational velocities of A-type stars. III. Velocity distributions | journal=Astronomy and Astrophysics | volume=463 | issue=2 | pages=671–682 | date=February 2007 | doi=10.1051/0004-6361:20065224 | bibcode=2007A&A...463..671R | arxiv=astro-ph/0610785 | postscript=. }}
11. ^1 2 3 4 {{citation | last1=Nicolet | first1=B. | title=Photoelectric photometric Catalogue of homogeneous measurements in the UBV System | journal=Astronomy and Astrophysics Supplement Series | volume=34 | pages=1–49 | date=1978 | bibcode=1978A&AS...34....1N | postscript=. }}
12. ^1 {{citation | url=http://penelope.uchicago.edu/Thayer/E/Gazetteer/Topics/astronomy/_Texts/secondary/ALLSTA/Piscis_Australis*.html | first1=Richard Hinckley | last1=Allen | year=1963 | title=Star Names — Their Lore and Meaning: Piscis Australis, the Southern Fish | accessdate=2017-05-27 | postscript=. }}
13. ^1 {{citation | title=bet PsA -- High proper-motion Star | work=SIMBAD Astronomical Database | publisher=Centre de Données astronomiques de Strasbourg | url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=bet+PsA | accessdate=2017-05-27 | postscript=. }}