| 词条 | 53 Eridani |
| 释义 |
|epoch=J2000 |constell=Eridanus |ra={{RA|04|38|10.82486}}[1] |dec={{DEC|-14|18|14.4600}}[1] |appmag_v=3.87[2] (4.02 / 6.95)[4] }}{{Starbox character |class=K1III[3] |b-v=+1.09[4] |u-b=+1.03[4] }}{{Starbox astrometry |radial_v=43.33 ± 0.28[5] |prop_mo_ra=-76.59[1] |prop_mo_dec=-176.78[1] |parallax=29.69 |p_error=0.37 |parallax_footnote=[1] }}{{Starbox orbit |reference=[6] |period=77.4 ± 1.5 |axis=0.7069 ± 0.0093 |inclination=59.8 ± 1.8 |node=171.25 ± 0.96 |periastron=1976.77 ± 0.26 |eccentricity=0.666 ± 0.017 |periarg=23.5 ± 1.8 }}{{Starbox detail |component1=53 Eri A |mass=1.07 ± 0.25[7] |radius=9.8[7] |temperature=4603[5] |luminosity=37[5] |gravity=2.49 ± 0.23[7] |metal_fe=-0.11[5] }}{{Starbox catalog |names={{odlist|name1=Sceptrum|BD=-14° 933|FK5=172|GJ=9160|HD=29503|HIP=21594|HR=1481|SAO=149781|WDS=04382+1418}} }}{{Starbox reference |Simbad=*+53+Eri|sn=53 Eri |Simbad2=*+53+Eri+A|sn2=53 Eri A |Simbad3=*+53+Eri+B|sn3=53 Eri B }}{{Starbox end}}53 Eridani (abbreviated 53 Eri), also designated l Eridani (l Eri), is a binary star in the constellation of Eridanus. The system has a combined apparent magnitude of 3.87, making it visible to the naked eye even in inner city skies.[8] Parallax estimates made by the Hipparcos spacecraft put it at a distance of about 110 light-years, or 33.7 parsecs from the Sun.[1] The two components are designated 53 Eridani A (also named Sceptrum[9]) and B. Nomenclature53 Eridani is the system's Flamsteed designation; l Eridani its Bayer designation. The designations of the two components as 53 Eridani A and B derive from the convention used by the Washington Multiplicity Catalog (WMC) for multiple star systems, and adopted by the International Astronomical Union (IAU).[10]53 Eridani bore the traditional name Sceptrum, Latin for "scepter", as it was one of the brighter stars, designated "p Sceptri (Brandenburgici)", in the obsolete constellation of Sceptrum Brandenburgicum. The constellation was coined by Gottfried Kirch to honor the Brandenburg province of Prussia, and although it was later used in other atlases by Johann Elert Bode, the constellation fell out of use.[11][12] In 2016, the IAU organized a Working Group on Star Names (WGSN)[13] to catalog and standardize proper names for stars. The WGSN decided to attribute proper names to individual stars rather than entire multiple systems.[14] It approved the name Sceptrum for the component 53 Eridani A on 30 June 2017 and it is now so included in the List of IAU-approved Star Names.[9] Properties53 Eridani is a visual binary, where the orbit of the two stars is calculated from their orbital motions. The primary star, 53 Eridani A, is an evolved red giant with a spectral type of K1III.[3] It is almost ten times as wide as the Sun and slightly more massive than the Sun.[7] The secondary star, 53 Eridani B, has an apparent magnitude of 6.95[6] and its spectral type is unknown. The two have an orbital period of 77 years and have a quite eccentric orbit, at 0.666.[6] The total mass of the system is {{solar mass|2.49}}.[15] References1. ^1 2 3 4 5 {{cite journal|title=Validation of the new Hipparcos reduction|url=http://www.aanda.org/index.php?option=com_article&access=bibcode&Itemid=129&bibcode=2007A%2526A...474..653VFUL|author=van Leeuwen, F.|display-authors=etal|journal=Astronomy and Astrophysics|volume=474|issue=2|pages=653–664|date=2007|arxiv=0708.1752|bibcode=2007A&A...474..653V|doi=10.1051/0004-6361:20078357}} {{Stars of Eridanus}}2. ^{{cite journal|bibcode=2002yCat.2237....0D|title=VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system|journal=CDS/ADC Collection of Electronic Catalogues|volume=2237|author1=Ducati, J. R.|year=2002}} 3. ^1 {{cite journal|bibcode=2006AJ....132..161G|doi=10.1086/504637|arxiv=astro-ph/0603770|title=Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 pc--The Southern Sample|journal=The Astronomical Journal|volume=132|pages=161|year=2006|last1=Gray|first1=R. O.|last2=Corbally|first2=C. J.|last3=Garrison|first3=R. F.|last4=McFadden|first4=M. T.|last5=Bubar|first5=E. J.|last6=McGahee|first6=C. E.|last7=O'Donoghue|first7=A. A.|last8=Knox|first8=E. R.}} 4. ^1 {{cite journal|title=UBVRIJKL Photometry of the Bright Stars|author1=Johnson, H. L.|journal=Communications of the Lunar and Planetary Laboratory|volume=4|pages=99|date=1966|bibcode=1966CoLPL...4...99J}} 5. ^1 2 3 {{cite journal|bibcode=2008AJ....135..209M|doi=10.1088/0004-6256/135/1/209|title=Rotational and Radial Velocities for a Sample of 761 Hipparcos Giants and the Role of Binarity|journal=The Astronomical Journal|volume=135|pages=209|year=2008|last1=Massarotti|first1=Alessandro|last2=Latham|first2=David W.|last3=Stefanik|first3=Robert P.|last4=Fogel|first4=Jeffrey}} 6. ^1 2 3 {{cite web|url=http://www.usno.navy.mil/USNO/astrometry/optical-IR-prod/wds/orb6|title=Sixth Catalog of Orbits of Visual Binary Stars|work=United States Naval Observatory|accessdate=15 May 2017}} 7. ^1 2 3 {{cite journal|title=Fundamental parameters of nearby stars from the comparison with evolutionary calculations: masses, radii and effective temperatures|author1=Allende Prieto, C.|author2=Lambert, D. L.|journal=Astronomy and Astrophysics|volume=352|pages=555–562|date=1999|bibcode=1999A&A...352..555A|arxiv=astro-ph/9911002}} 8. ^{{cite web|url=http://www.skyandtelescope.com/resources/darksky/3304011.html?page=1&c=y|title=The Bortle Dark-Sky Scale|last=Bortle|first=John E.|date=February 2001|work=Sky & Telescope|publisher=Sky Publishing Corporation|accessdate=15 May 2017}} 9. ^1 {{cite web | url=https://www.iau.org/public/themes/naming_stars/ | title=Naming Stars |publisher=IAU.org |accessdate=16 December 2017}} 10. ^{{cite arXiv |title=On the naming convention used for multiple star systems and extrasolar planets |date=2010 |eprint=1012.0707 |class=astro-ph.SR |last1= Hessman |first1=F. V. |last2= Dhillon |first2=V. S. |last3= Winget |first3=D. E. |last4= Schreiber |first4=M. R. |last5= Horne |first5=K. |last6= Marsh |first6=T. R. |last7= Guenther |first7=E. |last8= Schwope |first8=A. |last9= Heber |first9=U. }} 11. ^{{cite web|url=http://www.ianridpath.com/startales/sceptrum.htm|title=Sceptrum Brandenburgicum|author=Ian Ridpath|work=Star Tales|accessdate=15 May 2017}} 12. ^{{cite book | url=https://books.google.com.au/books?id=u_7NCgAAQBAJ&pg=PA365 | title=The Lost Constellations: A History of Obsolete, Extinct, or Forgotten Star Lore | author=Barentine, John C. | year=2015 | publisher=Springer | location=New York, New York | page=365}} 13. ^{{cite web | url=https://www.iau.org/science/scientific_bodies/working_groups/280/ | title=IAU Working Group on Star Names (WGSN)|accessdate=22 May 2016}} 14. ^{{cite web | url=https://www.iau.org/static/science/scientific_bodies/working_groups/280/wg-starnames-triennial-report-2015-2018.pdf | page=5 | title=WG Triennial Report (2015-2018) - Star Names |accessdate=2018-07-14}} 15. ^{{cite journal|title=Visual binary orbits and masses POST HIPPARCOS|author=Söderhjelm, Staffan|journal=Astronomy and Astrophysics|volume=341|pages=121–140|date=1999|bibcode=1999A&A...341..121S}} 11 : Eridanus (constellation)|Flamsteed objects|Bayer objects|Stars with proper names|K-type giants|Binary stars|Durchmusterung objects|Gliese and GJ objects|Henry Draper Catalogue objects|Hipparcos objects|HR objects |
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