| 词条 | Mu Cygni |
| 释义 |
| name = Mu Cygni }}{{Starbox observe | epoch = J2000 | constell = Cygnus | ra = {{RA|21|44|08.57793}}[1] | dec = {{DEC|28|44|33.4731}}[1] | appmag_v = 4.50[2] }}{{Starbox character | class = {{nowrap|F6V + G2V}}[3] | b-v = +0.47[2] }}{{Starbox astrometry | radial_v = +16.95[4] | prop_mo_ra = +260.72[2] | prop_mo_dec = -243.21[2] | parallax = 44.97 | p_error = 0.43 | parallax_footnote = [1] }}{{Starbox astrometry|no_heading=y | component1 = μ1 Cyg | absmag_bol = {{Val|2.91|0.06}}[10] | component2 = μ2 Cyg | absmag_bol2 = {{Val|4.32|0.06}}[10] }}{{Starbox orbit | reference = [5] | period = 789 | axis = 5.32 | eccentricity = 0.66 | inclination = 75.5 | node = 110.1 | periastron = 1958.0 | periarg = 145.7 }}{{Starbox detail | source = [6] | component1 = μ1 Cyg | temperature = {{Val|6350|80|fmt=commas}} | gravity = {{Val|4.05|0.10}} | metal_fe = {{Val|−0.18|0.07}} | rotational_velocity = {{Val|9.6|0.8}} | mass = 1.35 | radius = {{Val|1.88|0.07}} | component2 = μ2 Cyg | temperature2 = {{Val|6055|100|fmt=commas}} | gravity2 = {{Val|4.30|0.10}} | metal_fe2 = {{Val|−0.23|0.10}} | rotational_velocity2 = {{Val|2.5|1.0}} | mass2 = 1.02 | radius2 = {{Val|1.08|0.05}} }}{{Starbox catalog | names = {{odlist|F=78 Cyg|BD=+28° 4169|CCDM=J21442+2845AB|HIP=107310|WDS=J21441+2845AB}}[2] | component1 = μ1 Cyg | names1 = {{odlist|HD=206826|HR=8309|SAO=89940}}[15] | component2 = μ2 Cyg | names2 = {{odlist|HD=206827|HR=8310|SAO=89939}}[16] }}{{Starbox reference | Simbad = mu.+Cyg | sn=μ Cyg | Simbad2 = mu.01+Cyg | sn2= μ1 Cyg | Simbad3 = mu.02+Cyg | sn3= μ2 Cyg }}{{Starbox end}}μ Cygni (Latinised as Mu Cygni) is a binary star[7] in the constellation Cygnus. Located around {{convert|22.24|pc|ly}} distant, the system has a combined apparent magnitude of 4.50.[2] The primary, with an apparent magnitude of 4.69, has a spectral type of F6V,[8] and the secondary, with an apparent magnitude of 6.12, has a spectral type of G2V.[9] Their orbit has a period of around 800 years, with a semimajor axis of 5" and an eccentricity around 0.6.[10] Two reported additional components, C (apparent magnitude 12.93) and D (apparent magnitude 6.94), are believed to be optical doubles rather than part of the Mu Cygni system.[3] Component D is the more distant spectroscopic binary HD 206874 (HIP 107326), consisting of two early F-type subgiants.[11] References1. ^1 2 {{cite journal | title=Validation of the new Hipparcos reduction | url=http://www.aanda.org/articles/aa/full/2007/41/aa8357-07/aa8357-07.html | last1=van Leeuwen | first1=F. | 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 }} Vizier catalog entry {{Stars of Cygnus}}2. ^1 2 3 4 5 {{cite simbad|title = CCDM J21442+2845AB|accessdate = 2016-04-08}} 3. ^1 {{citation | display-authors=1 | last1=Mason | first1=Brian D. | last2=Wycoff | first2=Gary L. | last3=Hartkopf | first3=William I. | last4=Douglass | first4=Geoffrey G. | last5=Worley | first5=Charles E. | title=The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog | journal=The Astronomical Journal | volume=122 | issue=6 | pages=3466–3471 | date=December 2001 | bibcode=2001AJ....122.3466M | doi=10.1086/323920 }} Vizier catalog entry 4. ^{{citation | last1=Maldonado | first1=J. | last2= Martínez-Arnáiz | first2=R. M. | last3=Eiroa | first3=C. | last4=Montes | first4=D. | last5=Montesinos | first5=B. | title=A spectroscopy study of nearby late-type stars, possible members of stellar kinematic groups | journal=Astronomy and Astrophysics | volume=521 | pages=A12 |date=October 2010 | doi=10.1051/0004-6361/201014948 | bibcode=2010A&A...521A..12M |arxiv = 1007.1132 }} 5. ^{{citation | display-authors=1 | last1=Pourbaix | first1=D. | last2=Tokovinin | first2=A. A. | last3=Batten | first3=A. H. | last4=Fekel | first4=F. C. | last5=Hartkopf | first5=W. I. | last6=Levato | first6=H. | last7=Morrell | first7=N. I. | last8=Torres | first8=G. | last9=Udry | first9=S. | year=2004 | pages=727–732 | volume=424 | issue=2 | title=SB9: The Ninth Catalogue of Spectroscopic Binary Orbits | journal=Astronomy & Astrophysics | bibcode=2009yCat....102020P | doi=10.1051/0004-6361:20041213 | postscript=. | arxiv=astro-ph/0406573 }} 6. ^1 2 {{cite journal|bibcode=2011MNRAS.414.2893F|doi=10.1111/j.1365-2966.2011.18476.x|title=Nearby stars of the Galactic disc and halo - V|journal=Monthly Notices of the Royal Astronomical Society|volume=414|issue=4|pages=2893|year=2011|last1=Fuhrmann|first1=Klaus}} 7. ^{{Cite journal | doi = 10.1111/j.1365-2966.2008.13596.x| title = A catalogue of multiplicity among bright stellar systems| year = 2008| last1 = Eggleton | first1 = P. P.| last2 = Tokovinin | first2 = A. A.| journal = Monthly Notices of the Royal Astronomical Society| volume = 389| issue = 2| pages = 869| bibcode = 2008MNRAS.389..869E|arxiv = 0806.2878 }} Vizier catalog entry 8. ^1 {{cite simbad|title = HR 8309|accessdate = 13 January 2014}} 9. ^1 {{cite simbad|title = HR 8310|accessdate = 13 January 2014}} 10. ^{{citation | display-authors=1 | last1=Malkov | first1=O. Yu. | last2=Tamazian | first2=V. S. | last3=Docobo | first3=J. A. | last4=Chulkov | first4=D. A. | title=Dynamical masses of a selected sample of orbital binaries | journal=Astronomy & Astrophysics | volume=546 | issue=A69 | pages=A69 | date=October 2012 | bibcode=2012A&A...546A..69M | doi=10.1051/0004-6361/201219774 }} Vizier catalog entry 11. ^{{cite journal|bibcode=2009ApJS..180..117A|title=MK Classifications of Spectroscopic Binaries|journal=The Astrophysical Journal Supplement|volume=180|pages=117|author1=Abt|first1=Helmut A|year=2009|doi=10.1088/0067-0049/180/1/117}} 10 : F-type main-sequence stars|G-type main-sequence stars|Binary stars|Cygnus (constellation)|Bayer objects|Durchmusterung objects|Henry Draper Catalogue objects|Hipparcos objects|HR objects|Flamsteed objects |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。