| 词条 | HD 180555 |
| 释义 |
| name=HD 180555 }}{{Starbox observe | epoch=J2000 | ra={{RA|19|16|26.78744}} | dec={{DEC|+14|32|40.6234}} | appmag_v=5.67[3] {{nowrap|(5.68 + 9.58)}}[4] | constell=Aquila }}{{Starbox character | class=B9.5V[5] + G0IV[4] | r-i = | v-r = | b-v = −0.03[3] | u-b = −0.12[3] | variable= }}{{Starbox astrometry | radial_v=−19.3[9] | prop_mo_ra=+8.09 | prop_mo_dec=+1.03 | parallax=7.96 | p_error=0.60 | parallax_footnote= | absmag_v= }}{{Starbox orbit | reference=[1] | period=13.673 ± 0.069 | axis=0.0583 ± 0.0014 | inclination=131.3 ± 3.7 | node=242.3 ± 4.5 | periastron=B 2008.572 ± 1.101 | eccentricity=0.022 ± 0.010 | periarg=262.7 ± 28.7 }}{{Starbox detail | component1=HD 180555 A | mass= | radius= | luminosity= | temperature= | metal_fe= | rotational_velocity=158[14] | age_myr= }}{{Starbox catalog | }}{{Starbox reference | Simbad=HD+180555 }}{{Starbox end}}HD 180555 is a binary star in the equatorial constellation of Aquila. It consists of a two stars, orbiting with an orbital period of 8.95 years and an eccentricity of 0.43. A third component lies at an angular separation of 8.32″, but it is unrelated to the system.[4] References1. ^{{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=21 May 2017}} [2][3][4][5][6]2. ^1 {{citation | display-authors=1 | last1=Cowley | first1=A. | last2=Cowley | first2=C. | last3=Jaschek | first3=M. | last4=Jaschek | first4=C. | title=A study of the bright A stars. I. A catalogue of spectral classifications | journal=Astronomical Journal | volume=74 | pages=375–406 | date=April 1969 | doi=10.1086/110819 | bibcode=1969AJ.....74..375C}} 3. ^1 {{citation | last=Evans | first=D. S. | date=June 20–24, 1966 | editor1-last=Batten | editor1-first=Alan Henry | editor2-last=Heard | editor2-first=John Frederick | title=The Revision of the General Catalogue of Radial Velocities | work=Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30 | location=University of Toronto | publisher=International Astronomical Union | bibcode=1967IAUS...30...57E}} 4. ^1 {{citation | 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}} 5. ^1 2 3 {{citation | last1=Mermilliod | first1=J.-C. | title=Compilation of Eggen's UBV data, transformed to UBV (unpublished) | journal=Catalogue of Eggen's UBV data. SIMBAD | date=1986 | bibcode=1986EgUBV........0M}} 6. ^1 2 3 {{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}} }} External links
7 : Aquila (constellation)|Henry Draper Catalogue objects|B-type main-sequence stars|HR objects|Binary stars|Durchmusterung objects|Hipparcos objects |
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