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{{Starbox begin
| name = GSC 02620-00648
}}
{{Starbox observe 2s
| epoch = J2000.0
| constell = [[武仙座]]
| component1 = A<ref name="binary" />
| ra1 = {{RA|17|53|13.0490}}<ref name=dr3a/>
| dec1 = {{DEC|+37|12|42.586}}<ref name=dr3a/>
| appmag_v1 = 11.592<ref name="SIMBAD" />
| component2 = C<sup id="fn_a_back">[[#fn a|a]]</sup>
| ra2 = ~{{RA|17|53|13.0496}}<ref name=dr3c/>
| dec2 = ~{{DEC|+37|12|44.139}}<ref name=dr3c/>
| appmag_v2 = 13.85<ref name="binary" />
}}
{{Starbox character
| class = F8<ref name="binary" />/K or M<ref name="binary" />
| appmag_1_passband = B
| appmag_1 = 12.1120005 ±0.007<ref name="Mandushev2007" />
| appmag_2_passband = V
| appmag_2 = 11.592 ±0.004<ref name="Mandushev2007" />
| appmag_3_passband = J
| appmag_3 = 10.583 ±0.018<ref name="SIMBAD" />
| appmag_4_passband = H
| appmag_4 = 10.350 ±0.015<ref name="SIMBAD" />
| appmag_5_passband = K
| appmag_5 = 10.330 ±0.019<ref name="SIMBAD" />
}}
{{Starbox astrometry
| component1 = A
| prop_mo_ra = −6.382<ref name=dr3a/>
| prop_mo_dec = −20.891<ref name=dr3a/>
| parallax = 1.9686
| p_error = 0.0124
| parallax_footnote = <ref name=dr3a/>
| absmag_v =
| component2 = C
| prop_mo_ra2 = −6.307<ref name=dr3c/>
| prop_mo_dec2 = −20.387<ref name=dr3c/>
| parallax2 = 1.9657
| p_error2 = 0.1076
| parallax_footnote2 = <ref name=dr3c/>
| absmag_v2 =
}}
{{Starbox detail
| component1 = A
| mass = 1.18<ref name="binary" />
| luminosity = 4.6<ref name=dr3a/>
| temperature = {{val|fmt=commas|6200|75}}{{citation needed|date=October 2022}}
| radius = 1.9<ref name=dr3a/>
| gravity = 3.98<ref name=dr3a/>
| metal_fe = {{val|+0.14|0.09 }}{{citation needed|date=October 2022}}
| rotational_velocity = 8.3<ref name=brewer2018/>
| age_gyr = {{val|4.7|2}}{{citation needed|date=October 2022}}
| component2 = B
| mass2 = 0.59<ref name="binary" />
| temperature2 =
| metal_fe2 =
| age_gyr2 =
}}
{{Starbox catalog
| names = [[TrES-4 Parent Star]]、[[2MASS]] J17531304+3712426、[[依巴谷星表|TYC]] 2620-648-1<ref name="SIMBAD" />
}}
{{Starbox reference
| Simbad = GSC02620-00648
| EPE = TrES-4
}}
{{Starbox end}}

'''GSC 02620-00648'''是在[[武仙座]]的一對[[雙星]]。這對雙星中較亮的是一顆[[視星等]]12等，距離約1660[[光年]]的[[恆星]]。這顆恆星的質量大約是[[太陽]]的1.18倍<ref name="binary" />。

== 行星系統 ==
2006年，[[跨大西洋系外行星搜尋計劃]]（{{langx|en|Trans-atlantic Exoplanet Survey，TrES}}）計畫使用[[系外行星偵測法#凌日法|凌日法]]發現了系外行星[[TrES-4b]]<ref name="Mandushev2007">{{cite journal |author=Mandushev
|date=2007
|title=TrES-4: A Transiting Hot Jupiter of Very Low Density
|journal=The Astrophysical Journal Letters
|volume=667
|issue=2
|pages=L195–L198
|doi=10.1086/522115 |last2=O'Donovan |first2=Francis T. |last3=Charbonneau |first3=David |last4=Torres |first4=Guillermo |last5=Latham |first5=David W. |last6=Bakos |first6=Gáspár Á. |last7=Dunham |first7=Edward W. |last8=Sozzetti |first8=Alessandro |last9=Fernández |first9=José M. |last10=Esquerdo
|first10=Gilbert A.
|last11=Everett
|first11=Mark E.
|last12=Brown
|first12=Timothy M.
|last13=Rabus
|first13=Markus
|last14=Belmonte
|first14=Juan A.
|last15=Hillenbrand
|first15=Lynne A.
|bibcode=2007ApJ...667L.195M|arxiv = 0708.0834 |s2cid=6087170
}}</ref>This planet orbits the primary star.<ref name="binary" />

{{OrbitboxPlanet begin}}
{{OrbitboxPlanet
| exoplanet = [[TrES-4b|b]]
| mass = 0.919 ± 0.073<ref name="binary" />
| period = 3.553945 ± 7.5e-05
| semimajor = 0.05091 ± 0.00071<ref name="binary" />
| eccentricity = 0
|radius=1.799<ref>{{Cite journal |last1=Daemgen |first1=S. |last2=Hormuth |first2=F. |last3=Brandner |first3=W. |last4=Bergfors |first4=C. |last5=Janson |first5=M. |last6=Hippler |first6=S. |last7=Henning |first7=Th |date=May 2009 |title=Binarity of Transit Host Stars - Implications on Planetary Parameters |journal=Astronomy & Astrophysics |volume=498 |issue=2 |pages=567–574 |doi=10.1051/0004-6361/200810988 |arxiv=0902.2179 |bibcode=2009A&A...498..567D |s2cid=9893376 |issn=0004-6361}}</ref>}}
{{Orbitbox end}}

== 聯星 ==
2008年，一項針對14顆帶有系外行星的恆星進行了研究，而這些恆星最初是通過相對較小的望遠鏡使用[[系外行星偵測法#凌日法|凌日法]]發現的。這些系統在[[西班牙]]的[[卡拉爾阿爾托天文臺]]用2.2M[[反射望遠鏡]]重新檢查。這個恆星系統和另外兩個恆星系統被確定為以前未知的[[聯星]]系統。之前未知的伴星是一顆暗淡的[[視星等|星等]]14[[恆星分類|K或M型]]恆星，與主星相距約755[[天文單位|AU]]，在影像中看起來偏離主星約一弧秒。這一發現導致了行星和主星參數的重新計算<ref name=binary/>。

== 相關條目 ==
* [[跨大西洋系外行星搜尋計劃]]
* [[太陽系外行星列表]]
* [[行星列表]]

== 註解 ==
* <cite id="fn_a">[[#fn a back|Note b:]]</cite> The secondary star is identified with a "C" suffix so as to not confuse it with the planetary designation suffix "b".<ref name=binary/>

== 參考資料 ==
{{Reflist|refs=

<ref name="SIMBAD">{{cite simbad
| title = NAME TrES-4 Parent Star
| access-date=2009-04-23 }}</ref>

<ref name=brewer2018>{{cite journal |bibcode=2018ApJS..237...38B |title=Spectral Properties of Cool Stars: Extended Abundance Analysis of Kepler Objects of Interest |last1=Brewer |first1=John M. |last2=Fischer |first2=Debra A. |journal=The Astrophysical Journal Supplement Series |year=2018 |volume=237 |issue=2 |page=38 |doi=10.3847/1538-4365/aad501 |arxiv=1804.00673 |s2cid=119431797 |doi-access=free }}</ref>

<ref name=binary>{{cite journal
| title=Binarity of transit host stars - Implications for planetary parameters
| date=2009
| volume=498
| issue=2
| pages=567–574
| author=Daemgen
| journal=[[Astronomy and Astrophysics]]
| doi=10.1051/0004-6361/200810988
| last2=Hormuth
| first2=F.
| last3=Brandner
| first3=W.
| last4=Bergfors
| first4=C.
| last5=Janson
| first5=M.
| last6=Hippler
| first6=S.
| last7=Henning
| first7=T.
| bibcode=2009A&A...498..567D|arxiv = 0902.2179 | s2cid=9893376
}}</ref>

<ref name=dr3a>{{cite Gaia DR3|4609062308806929152}}</ref>

<ref name=dr3c>{{cite Gaia DR3|4609062381822880384}}</ref>

}}

== 外部連結 ==
* {{cite web
| url=http://media4.obspm.fr/exoplanets/base/etoile.php?nom=TrES-4
| title=TrES-4
| work=Exoplanets
| access-date=2009-04-28
| archive-url=https://web.archive.org/web/20091125012903/http://media4.obspm.fr/exoplanets/base/etoile.php?nom=TrES-4
| archive-date=2009-11-25
| url-status=dead
}}
* {{cite news
| url=https://www.newscientist.com/article/dn12430-largest-known-exoplanet-puzzles-astronomers.html
| title=Largest known exoplanet puzzles astronomers
| date=August 6, 2007
| publisher=[[New Scientist|NewScientist.com]] news service
| first=Hazel
| last=Muir
| access-date=2007-08-07
| archive-date=2014-11-07
| archive-url=https://web.archive.org/web/20141107155115/http://www.newscientist.com/article/dn12430-largest-known-exoplanet-puzzles-astronomers.html
| dead-url=no
}}


{{Sky|17|53|13|+|37|12|42}}


{{武仙座恆星}}

{{DEFAULTSORT:GSC 02620-00648}}

[[Category:武仙座]]
[[Category:行星凌變星]]
[[Category:具有一顆已確認行星的行星系統]]
[[Category:聯星]]
[[Category:F型恆星]]
[[Category:聚星的行星系|2]]

GSC 02620-00648 - 版本历史

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