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词条 16 Vulpeculae
释义

  1. References

{{Starbox begin}}{{Starbox observe
|epoch = J2000.0
|constell = Vulpecula
|ra = {{RA|20|02|01.43152}}
|dec = {{Dec|+24|56|16.9534}}
|appmag_v =5.787[3] {{nowrap|5.93 + 6.22}}[4]
}}{{Starbox character
|class = F2 III[5]
|b-v = +0.37[6]
|u-b = +0.10[6]
}}{{Starbox astrometry
|radial_v={{Val|−37.00|3.7}}[8]
|prop_mo_ra=89.31
|prop_mo_dec=69.44
|parallax=14.71
|p_error=0.50
|parallax_footnote=
| absmag_v = 2.47[12]
}}{{Starbox orbit
|reference=[13]
|period=1201
|axis=2.687
|eccentricity=0.932
|inclination=79.0
|node=84.5
|periarg=276.5
|periastron=B 1863.7
}}{{Starbox detail
| source =
| component1 = 16 Vul A
| mass = 1.34[14]
| radius =
| luminosity = 31.13[15]
| gravity = {{Val|3.76|0.14}}[14]
| temperature = {{Val|6888|234|fmt=commas}}[14]
| metal_fe = 0.17[18]
| rotational_velocity = {{Val|136.1|6.8}}[12]
| age_myr = 742[14]
}}{{Starbox catalog
|names={{odlist|F=16 Vul|BD=+24° 3977|FK5=|GJ=|HD=190004|HIP=98636|HR=7657|SAO=88098}}[21]
}}{{Starbox reference
|Simbad=16+Vul
}}{{Starbox end}}16 Vulpeculae is a binary star system in the northern constellation Vulpecula. It has a combined apparent visual magnitude of 5.787,[3] which is near the lower limit of visibility to the naked eye. Based upon an annual parallax shift of {{Val|14.71|0.50}} as seen from Earth's orbit, it is located about 222 light years away. The system is moving closer to the Sun with a heliocentric radial velocity of about −37 km/s.[8] It will make its closest approach in about 0.9 million years, coming within {{Convert|47.42|pc|ly|order=flip|sigfig=3}}.[15]

The pair orbit each other with an estimated period of 1,201 years and an orbital eccentricity of 0.932.[13] The magnitude 5.93 primary, component A, displays a stellar classification of F2III,[21] matching an aging F-type giant star. This star is spinning rapidly with a projected rotational velocity of 136 km/s.[12] This is giving the star an oblate shape with an equatorial bulge that is an estimated 21% larger than the polar radius.[30] It is 742[14] million years old with 1.34[14] times the mass of the Sun. The star is radiating 31[15] times the Sun's luminosity from its photosphere at an effective temperature of about 6,888 K.[14]

References

1. ^{{cite journal|author1=Mermilliod, J.-C.|title=Compilation of Eggen's UBV data, transformed to UBV (unpublished)|url=http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?1986EgUBV........0M&db_key=AST&nosetcookie=1|date=1986|bibcode= 1986EgUBV........0M}}
2. ^{{cite journal|title=The Tycho-2 catalogue of the 2.5 million brightest stars|author1=Høg, E.|display-authors=etal|date=2000|journal=Astronomy and Astrophysics|volume=355|pages=L27–L30|bibcode=2000A&A...355L..27H}}
3. ^{{cite simbad|title=* 16 Vul|access-date=20 August 2017}}
4. ^{{cite web|url=http://www.usno.navy.mil/USNO/astrometry/optical-IR-prod/wds/orb6|title=Sixth Catalog of Orbits of Visual Binary Stars|publisher=United States Naval Observatory|accessdate=24 August 2017}}
5. ^{{citation | last1=David | first1=Trevor J. | last2=Hillenbrand | first2=Lynne A. | title=The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets | journal=The Astrophysical Journal | volume=804 | issue=2 | pages=146 | year=2015 | bibcode=2015ApJ...804..146D | doi=10.1088/0004-637X/804/2/146 | arxiv=1501.03154 | postscript=. }}
6. ^{{citation | last1=Ammler-von Eiff | first1=M. | last2=Reiners | first2=A. | title=New measurements of rotation and differential rotation in A-F stars: are there two populations of differentially rotating stars? | journal=Astronomy & Astrophysics | arxiv=1204.2459 | volume=542 | page=A116 | date=June 2012 | postscript=. | doi=10.1051/0004-6361/201118724 | bibcode=2012A&A...542A.116A }}
7. ^{{citation | title=Interferometric observations of rapidly rotating stars | last1=Belle | first1=G. T. | journal=The Astronomy and Astrophysics Review | volume=20| page=51 | year=2012 | doi=10.1007/s00159-012-0051-2 | bibcode=2012A&ARv..20...51V | arxiv=1204.2572 | postscript=. }}
8. ^{{citation | display-authors=1 | last1=Casagrande | first1=L. | last2=Schönrich | first2=R. | last3=Asplund | first3=M. | last4=Cassisi | first4=S. | last5=Ramírez | first5=I. | last6=Meléndez | first6=J. | last7=Bensby | first7=T. | last8=Feltzing | first8=S. | title=New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s). Improved astrophysical parameters for the Geneva-Copenhagen Survey | journal=Astronomy & Astrophysics | volume=530 | issue=A138 | pages=21 | date=2011 | doi=10.1051/0004-6361/201016276 | bibcode=2011A&A...530A.138C | postscript=. | arxiv=1103.4651 }}
9. ^{{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. ^{{citation | title=XHIP: An extended hipparcos compilation | last1=Anderson | first1=E. | last2=Francis | first2=Ch. | journal=Astronomy Letters | volume=38 | issue=5 | pages=331 | year=2012 | bibcode=2012AstL...38..331A | doi=10.1134/S1063773712050015 | arxiv=1108.4971 | postscript=. }}
11. ^{{citation | last1=Cowley |first1=Anne | last2=Fraquelli |first2=Dorothy | title=MK Spectral Types for Some Bright F Stars | journal=Publications of the Astronomical Society of the Pacific | volume=86 |pages=70 | year=1974 | doi=10.1086/129562 | bibcode=1974PASP...86...70C }}
12. ^{{citation | display-authors=1 | last1=Holmberg | first1=J. | last2=Nordström | first2=B. | last3=Andersen | first3=J. | title=The Geneva-Copenhagen survey of the Solar neighbourhood. II. New uvby calibrations and rediscussion of stellar ages, the G dwarf problem, age-metallicity diagram, and heating mechanisms of the disk | journal=Astronomy & Astrophysics | volume=475 | pages=519–537 | date=2007 | arxiv=0707.1891 | bibcode=2007A&A...475..519H | doi=10.1051/0004-6361:20077221 | postscript=. }}
[1][2][3][4][5][6][7][8][9][10][11][12]
}}{{Stars of Vulpecula}}{{giant-star-stub}}

8 : Flamsteed objects|Vulpecula|F-type giants|Binary stars|Durchmusterung objects|Henry Draper Catalogue objects|Hipparcos objects|HR objects

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