| 词条 | 6 Geminorum |
| 释义 |
}}{{Starbox image | image={{Location mark |image=Gemini constellation map.svg|alt=|float=center|width=280 |label=|position=right |mark=Red circle.svg|mark_width=10|mark_link=6 Gem |x=802|y=350 }} |caption=Location of 6 Geminorum (circled) }}{{Starbox observe |epoch=J2000 |ra={{RA|06|12|19.09863}} | dec={{DEC|+22|54|30.6424}} |appmag_v=5.74 - 8.10[3] |constell=Gemini }}{{Starbox character |class=M1-2Ia-Iab[3] |b-v=+1.63[5] |u-b=+1.93[5] | variable = LC[3] }}{{Starbox astrometry |radial_v=27.16 |prop_mo_ra=-0.40 |prop_mo_dec=-3.12 |parallax=-0.52 |p_error=0.69 |absmag_v=-6.32[10] }}{{Starbox detail |mass=~20[11] |radius=670[10] |gravity=0.0[10] |luminosity=86,000[14] |temperature=3,789[15] }}{{Starbox catalog |names=6 Gem, BU Gem, HR 2197, BD+22° 1220, HD 42543, HIP 29450, SAO 78098, GC 7896, TYC 1877-1719-1, 2MASS J06121911+2254305 }}{{Starbox reference |Simbad=HD+42543 }}{{Starbox end}}6 Geminorum, also designated BU Geminorum (abbrev: BU Gem), is a red supergiant, located in the constellation Gemini. BU Geminorum is a semiregular variable star, found southwest of M 35, below WY Geminorum, with magnitudes +5.7 to +7.5 v over a period of 325 days. At its brightest the star is barely visible to the naked eye but visible with binoculars. It has been given the sub-classification of Lc "Irregular variable supergiants of late spectral types having amplitudes of about 1 mag. in V.O".[1] References1. ^[https://www.aavso.org/vsx/index.php?view=about.vartypes Variable Star Type Designations in VSX]- Retrieved 2016-11-06 Vizier catalog entry[2][3][4][5][6][7]2. ^1 2 {{cite journal | author1=Mermilliod, J.-C. | title=Compilation of Eggen's UBV data, transformed to UBV (unpublished) | journal=Catalogue of Eggen's UBV data | url = http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?1986EgUBV........0M&db_key=AST&nosetcookie=1 | date=1986 | bibcode= 1986EgUBV........0M }} 3. ^1 {{cite web|title=6 GEM|url=http://stars.astro.illinois.edu/sow/6gem.html|date=2012|accessdate=15 December 2016}} 4. ^1 2 3 {{cite journal|title=The Effective Temperature Scale of Galactic Red Supergiants: Cool, but Not As Cool As We Thought|author1=Levesque, Emily M.|date=2005|journal=The Astrophysical Journal|volume=628|issue=2|pages=973–985|bibcode=2005ApJ...628..973L|doi=10.1086/430901|arxiv=astro-ph/0504337}} 5. ^1 {{cite journal| title = A new stellar library in the region of the CO index at 2.3 μm. New index definition and empirical fitting functions| year = 2008| journal = Astronomy and Astrophysics| volume = 489| issue = 2| pages = 885–909| bibcode = 2008A&A...489..885M| author1 = Mármol-Queraltó| first1 = E| last2 = Cardiel| first2 = N| last3 = Cenarro| first3 = A. J| last4 = Vazdekis| first4 = A| last5 = Gorgas| first5 = J| last6 = Pedraz| first6 = S| last7 = Peletier| first7 = R. F| last8 = Sánchez-Blázquez| first8 = P| doi = 10.1051/0004-6361:200810044| arxiv = 0806.0581| url = http://eprints.ucm.es/28210/1/cardiel29libre.pdf}} 6. ^1 2 3 {{cite journal|bibcode=2009yCat....102025S|title=VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)|journal=VizieR On-line Data Catalog: B/gcvs. Originally published in: 2009yCat....102025S|volume=1|display-authors=etal|author1=Samus|first1=N. N.|last2=Durlevich|first2=O. V.|year=2009}} 7. ^1 {{cite journal|bibcode=2011A&A...526A.156M|arxiv=1010.5369|title=The mass-loss rates of red supergiants and the de Jager prescription|journal=Astronomy and Astrophysics|volume=526|pages=A156|author1=Mauron|first1=N|last2=Josselin|first2=E|year=2011|doi=10.1051/0004-6361/201013993}} }}{{Stars of Gemini}}{{supergiant-star-stub}}{{var-star-stub}} 11 : Flamsteed objects|Objects with variable star designations|M-type supergiants|Gemini (constellation)|Slow irregular variables|HR objects|Henry Draper Catalogue objects|Hipparcos objects|2MASS objects|Durchmusterung objects|IRAS catalogue objects |
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