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| {{Starbox begin
| | I would like to introduce myself to you, I am Jayson Simcox but I don't like when people use my complete name. Distributing production is exactly where my main income arrives from and it's something I really enjoy. Mississippi is where her house is but her spouse desires them to move. One of the extremely very best things in the globe for him is performing ballet and he'll be beginning something else alongside with real psychics ([http://cspl.postech.ac.kr/zboard/Membersonly/144571 cspl.postech.ac.kr]) it.<br><br>Feel free to surf [http://checkmates.co.za/index.php?do=/profile-56347/info/ email psychic readings] to my web-site ... [http://formalarmour.com/index.php?do=/profile-26947/info/ certified psychics] |
| | name=Gamma Herculis
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| }}
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| {{Starbox image
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| | image =
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| <div style="position: relative">[[File:Hercules IAU.svg|250px|alt=Diagram showing star positions and boundaries of the Hercules constellation and its surroundings]]
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| <div style="position: absolute; left: 74.8%; top: 56.8%;">[[File:Cercle rouge 100%.svg|12px]]</div>
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| </div>
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| | caption=Location of γ Herculis (circled)
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| }}
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| {{Starbox observe
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| | epoch = J2000
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| | ra = {{RA|16|21|55.21440}}<ref name=aaa474_2_653/>
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| | dec = {{DEC|+19|09|11.2618}}<ref name=aaa474_2_653/>
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| | appmag_v = +3.75<ref name=aass34_1/>
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| | constell = [[Hercules (constellation)|Hercules]]
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| }}
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| {{Starbox character
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| | class = A9 III<ref name=simbad/>
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| | b-v = +0.27<ref name=aass34_1/>
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| | u-b = +0.18<ref name=aass34_1/>
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| | variable = Semi-regular pulsating<ref name=simbad/>
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| }}
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| {{Starbox astrometry
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| | radial_v = –35.3<ref name=gcsrv/>
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| | prop_mo_ra = –47.39<ref name=aaa474_2_653/>
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| | prop_mo_dec = +43.81<ref name=aaa474_2_653/>
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| | parallax = 16.93
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| | p_error = 0.22
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| | parallax_footnote = <ref name=aaa474_2_653/>
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| | absmag_v =
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| }}
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| {{Starbox detail
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| | mass =
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| | radius = 6<ref name=lang2006/>
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| | metal_fe =
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| | gravity = 3.3<ref name=aj135_1_209/>
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| | age_myr =
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| | luminosity =
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| | temperature = 7,031<ref name=aj135_1_209/>
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| | rotational_velocity = 135<ref name=csrv/>
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| }}
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| {{Starbox catalog
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| | names = [[Bonner Durchmusterung|BD]]+19 3086, [[Henry Draper catalogue|HD]] 147547, [[Hipparcos catalogue|HIP]] 80170, [[Harvard Revised catalogue|HR]] 6095, [[Smithsonian Astrophysical Observatory|SAO]] 102107.<ref name=simbad/>
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| }}
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| {{Starbox end}}
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| '''Gamma Herculis''' (γ Herculis, γ Her) is a [[Magnitude (astronomy)|magnitude]] 3.74 [[binary star]] system in the northern [[constellation]] of [[Hercules (constellation)|Hercules]].<ref name=simbad/>
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| ==Properties==
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| This is known to be a [[spectroscopic binary]] system,<ref name=aj122_6_3466/> although there is no information about the secondary component.<ref name=kaler/> Based upon [[parallax]] measurements, this system is located at a distance of about {{Convert|193|ly|pc|abbr=off|lk=on}} from the [[Earth]].<ref name=aaa474_2_653/> The [[spectrum]] of the primary star matches a [[stellar classification]] of A9III, which indicates this is a [[giant star]] that has exhausted the hydrogen at its core and [[stellar evolution|evolved]] away from the [[main sequence]]. The [[effective temperature]] is about 7,031 K,<ref name=aj135_1_209/> giving the star a white hue characteristic of [[A-type star]]s.<ref name=csiro/> It is rotating rapidly with a [[stellar rotation|projected rotational velocity]] of {{nowrap|135 km s<sup>–1</sup>}}.<ref name=csrv/> The [[interferometry]]-measured [[angular diameter]] of this star is {{nowrap|0.95 ± 0.04 [[milliarcseconds|mas]]}},<ref name=aaa431_773/> which, at its estimated distance, equates to a physical radius of about six times the [[Solar radius|radius of the Sun]].<ref name=lang2006/>
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| Observations by German astronomer [[Ernst Zinner]] in 1929 gave indications that this may be a [[variable star]]. It was listed in the ''[[New Catalogue of Suspected Variable Stars]]'' (1981) with a magnitude range of 3.74 to 3.81. Further observations up to 1991 showed a pattern of small, slow variations with a magnitude variation of 0.05. These appeared to repeat semi-regularly with a period of 183.6 days, although the spectroscopic data presented a longer period of 165.9 days.<ref name=caosp21_7/>
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| ==Name==
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| It was a member of indigenous Arabic [[Asterism (astronomy)|asterism]] '''al-Nasaq al-Sha'āmī''', "the Northern Line" of ''al-Nasaqān'' "the Two Lines",<ref name=kunitzsch2006/> along with [[Beta Herculis|β Her]] (Kornephoros), [[Gamma Serpentis|γ Ser]] (Zheng, Ching) and [[Beta Serpentis|β Ser]] (Chow).<ref name=allen1963/>
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| According to the catalogue of stars in the ''Technical Memorandum 33-507 - A Reduced Star Catalog Containing 537 Named Stars'', ''al-Nasaq al-Sha'āmī'' or '''Nasak Shamiya''' were the title for three stars :[[Beta Serpentis|β Ser]] as ''Nasak Shamiya I'', [[Gamma Serpentis|γ Ser]] as ''Nasak Shamiya II'', γ Her as ''Nasak Shamiya III'' (exclude [[Beta Herculis|β Her]])<ref>[http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19720005197_1972005197.pdf Jack W. Rhoads - ''Technical Memorandum 33-507-A Reduced Star Catalog Containing 537 Named Stars'', Jet Propulsion Laboratory, California Institute of Technology; November 15, 1971]</ref>
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| In [[Chinese language|Chinese]], {{lang|zh|天市右垣}} ({{lang|zh-Latn|Tiān Shì Yòu Yuán}}), meaning ''[[Heavenly Market enclosure|Right Wall of Heavenly Market Enclosure]]'', refers to an asterism which is represent eleven old states in China which is marking the right borderline of the enclosure, consisting of γ Herculis, [[Beta Herculis|β Herculis]], [[Kappa Herculis|κ Herculis]], [[Gamma Serpentis|γ Serpentis]], [[Beta Serpentis|β Serpentis]], [[Delta Serpentis|δ Serpentis]], [[Alpha Serpentis|α Serpentis]], [[Epsilon Serpentis|ε Serpentis]], [[Delta Ophiuchi|δ Ophiuchi]], [[Epsilon Ophiuchi|ε Ophiuchi]] and [[Zeta Ophiuchi|ζ Ophiuchi]].<ref>{{zh icon}} ''中國星座神話'', written by 陳久金. Published by 台灣書房出版有限公司, 2005, ISBN 978-986-7332-25-7.</ref> Consequently, γ Herculis itself is known as {{lang|zh|天市右垣二}} ({{lang|zh-Latn|Tiān Shì Zuǒ Yòu èr}}, {{lang-en|the Second Star of Right Wall of Heavenly Market Enclosure}}), represent ''Héjiān'' (河間), possibly '''Hejian''' states (located in roughly modern [[Cangzhou]], [[Hebei]]) or '''Hejian Commandery''' (located in roughly modern [[Baoding]], [[Hebei]]), (see : [[Sima Yong]], the Prince of Hejian 河間王 and [[Liu Wuzhou]]).<ref name=sb1>{{zh icon}} [http://aeea.nmns.edu.tw/2006/0606/ap060624.html AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 6 月 24 日]</ref><ref>{{zh icon}} [http://www.lcsd.gov.hk/CE/Museum/Space/Research/StarName/e_research_chinengstarzone_b.htm#HeavenlyMarketEnclosure English-Chinese Glossary of Chinese Star Regions, Asterisms and Star Name], Hong Kong Space Museum. Accessed on line November 23, 2010.</ref> ''Héjiān'' (河間) was westernized into '''Ho Keen''' by R.H. Allen, which was the meaning "between the river".<ref>[http://penelope.uchicago.edu/Thayer/E/Gazetteer/Topics/astronomy/_Texts/secondary/ALLSTA/Hercules*.html Star Names - R.H.Allen p. 244]</ref>
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| ==References==
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| {{reflist|refs=
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| <ref name=aaa474_2_653>{{cite journal | first=F. | last=van Leeuwen |date=November 2007 | title=Validation of the new Hipparcos reduction | journal=Astronomy and Astrophysics | volume=474 | issue=2 | pages=653–664 | bibcode=2007A&A...474..653V | doi=10.1051/0004-6361:20078357 |arxiv = 0708.1752 }}</ref>
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| <ref name=simbad>{{cite web | title=V* gam Her -- Semi-regular pulsating Star | work=SIMBAD Astronomical Database | publisher=Centre de Données astronomiques de Strasbourg | url=http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Gamma+Herculis | accessdate=2010-06-23 }}</ref>
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| <ref name=aj135_1_209>{{citation | display-authors=1 | last1=Massarotti | first1=Alessandro | last2=Latham | first2=David W. | last3=Stefanik | first3=Robert P. | last4=Fogel | first4=Jeffrey | title=Rotational and Radial Velocities for a Sample of 761 HIPPARCOS Giants and the Role of Binarity | journal=The Astronomical Journal | volume=135 | issue=1 | pages=209–231 |date=January 2008 | doi=10.1088/0004-6256/135/1/209 | bibcode=2008AJ....135..209M }}</ref>
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| <ref name=gcsrv>{{cite book | last=Wilson | first=Ralph Elmer | year=1953 | title=General Catalogue of Stellar Radial Velocities | publisher=Carnegie Institution of Washington | location=Washington | bibcode=1953QB901.W495..... }}</ref>
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| <ref name=csrv>{{cite journal | last1=Bernacca | first1=P. L. | last2=Perinotto | first2=M. | title=A catalogue of stellar rotational velocities | journal=Contributi Osservatorio Astronomico di Padova in Asiago | volume=239 | issue=1 | year=1970 | bibcode=1970CoAsi.239....1B }}</ref>
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| <ref name=kunitzsch2006>{{cite book | last1=Kunitzsch | first1=P. | last2=Smart | first2=T. | year=2006 | title=A Dictionary of Modern Star names: A Short Guide to 254 Star names and Their Derivations | edition=Second Revised | publisher=Sky Publishing | location=Cambridge, MA | isbn=1-931559-44-9 | page=31}}</ref>
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| <ref name=allen1963>{{cite book | last=Allen | first=R. H. | year=1963 | authorlink=Richard Hinckley Allen | title=Star Names: Their Lore and Meaning | url=http://penelope.uchicago.edu/Thayer/E/Gazetteer/Topics/astronomy/_Texts/secondary/ALLSTA/Hercules*.html | accessdate=2010-12-12 | edition=Reprint | publisher=Dover Publications Inc | location=New York, NY | isbn=0-486-21079-0 | page=243 }}</ref>
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| <ref name=aass34_1>{{cite journal | last1=Nicolet | first1=B. | year=1978 | title=Photoelectric photometric Catalogue of homogeneous measurements in the UBV System | journal=Astronomy and Astrophysics Supplement Series | volume=34 | pages=1–49 | bibcode=1978A&AS...34....1N }}</ref>
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| <ref name=caosp21_7>{{citation | last1=Bakos | first1=G. A. | last2=Tremko | first2=J. | title=Photometry and spectroscopy of Gamma Herculis | journal=Contributions of the Astronomical Observatory Skalnate Pleso | volume=21 | pages=7–14 | year=1991 | bibcode=1991CoSka..21....7B }}</ref>
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| <ref name=aaa431_773>{{citation | last1=Richichi | pages=A. | last2=Percheron | first2=I. | last3=Khristoforova | first3=M. | title=CHARM2: An updated Catalog of High Angular Resolution Measurements | journal=Astronomy and Astrophysics | volume=431 | pages=773–777 |date=February 2005 | doi=10.1051/0004-6361:20042039 | bibcode=2005A&A...431..773R }}</ref>
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| <ref name=lang2006>{{citation | first1=Kenneth R. | last1=Lang | title=Astrophysical formulae | volume=1 | series=Astronomy and astrophysics library | edition=3 | publisher=Birkhäuser | year=2006 | isbn=3-540-29692-1 | url=http://books.google.com/books?id=OvTjLcQ4MCQC&pg=PA41 }}. The radius (R<sub>*</sub>) is given by:
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| :<math>\begin{align} 2\cdot R_*
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| & = \frac{(10^{-3}\cdot 59.1\cdot 0.95)\ \text{AU}}{0.0046491\ \text{AU}/R_{\bigodot}} \\
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| & \approx 12.0\cdot R_{\bigodot}
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| \end{align}</math></ref>
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| <ref name=aj122_6_3466>{{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 | doi=10.1086/323920 | bibcode=2001AJ....122.3466M }}</ref>
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| <ref name=kaler>{{citation | first1=James B. | last1=Kaler | title==GAMMA HER (Gamma Herculis) | work=Stars | publisher=University of Illinois | url=http://stars.astro.illinois.edu/sow/gammaher.html | accessdate=2012-01-02 }}</ref>
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| <ref name=csiro>{{citation | title=The Colour of Stars | date=December 21, 2004 | work=Australia Telescope, Outreach and Education | publisher=Commonwealth Scientific and Industrial Research Organisation | url=http://outreach.atnf.csiro.au/education/senior/astrophysics/photometry_colour.html | accessdate=2012-01-16 }}</ref>
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| {{Stars of Hercules}}
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| [[Category:Hercules (constellation)]]
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| [[Category:Binary stars]]
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