https://arolstar52-zhtest.hf.space/index.php?action=history&feed=atom&title=HD_70642
HD 70642 - 版本历史
2026-07-19T19:18:20Z
本wiki上该页面的版本历史
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https://arolstar52-zhtest.hf.space/index.php?title=HD_70642&diff=1814966&oldid=prev
imported>Jimmy-bot：机器人: 尚未清空的已重定向分类（Cat:黃矮星→Cat:G型主序星）
2024-06-25T11:34:09Z
<p>机器人: 尚未清空的已重定向分类（<a href="/index.php?title=Cat:%E9%BB%83%E7%9F%AE%E6%98%9F&action=edit&redlink=1" class="new" title="Cat:黃矮星（页面不存在）">Cat:黃矮星</a>→<a href="/index.php?title=Cat:G%E5%9E%8B%E4%B8%BB%E5%BA%8F%E6%98%9F&action=edit&redlink=1" class="new" title="Cat:G型主序星（页面不存在）">Cat:G型主序星</a>）</p>
<p><b>新页面</b></p><div>{{Starbox begin <br />
| name = [[Henry Draper catalogue|HD]] 70642<br />
}} <br />
{{Starbox observe <br />
| epoch = J2000.0<br />
| constell = [[船尾座]]<br />
| ra = {{RA|8|21|28.1361}}<br />
| dec = {{DEC|–39|42|19.474}}<br />
| appmag_v = +7.18<br />
}} <br />
{{Starbox character <br />
| class = G5V<br />
| r-i = 0.32<br />
| v-r = 0.35<br />
| b-v = 0.70<br />
| u-b = 0.28<br />
| variable = 無<br />
}} <br />
{{Starbox astrometry <br />
| radial_v = +48.1<br />
| prop_mo_ra = –202.07 <br />
| prop_mo_dec = 225.59<br />
| parallax = 34.77 <br />
| p_error = 0.60<br />
| dist_ly = 93.8<br />
| dist_pc = 28.76<br />
| absmag_v = +4.89<br />
}} <br />
{{Starbox detail <br />
| age = 3.8&nbsp;×&nbsp;10<sup>9</sup><br />
| metal = 0.16 ± 0.02 Fe/H <br>(145% Sun)<br />
| mass = 1 ± 0.05<br />
| radius = 1.01<br />
| gravity = 4.72<br />
| rotation = ?<br />
| luminosity = 0.96<br />
| temperature = 5533<br />
}} <br />
{{Starbox catalog <br />
| names = [[Cordoba Durchmusterung|CD]]-39°4247, [[Cape Photographic Durchmusterung|CP(D)]]-39°2308, [[Luyten Two-Tenths catalogue|LTT]] 3116, [[Hipparcos catalogue|HIP]] 40952, [[Gliese-Jahreiss catalogue|Gl]] 304, [[Smithsonian Astrophysical Observatory catalogue|SAO]] 199126<br />
}}<br />
{{Starbox reference<br />
| Simbad = HD+70642<br />
| NSTED = HD+70642<br />
| ARICNS = 00626<br />
| EPE = HD+70642<br />
}}<br />
{{Starbox end}} <br />
<br />
'''HD 70642'''是一顆位於[[船尾座]]的[[黃矮星]]，距離地球約93.8光年。它的質量和半徑與太陽大致相同，溫度和光度稍低於太陽，[[金屬量]]（鐵和氫的比值）高於[[太陽]]。<br />
<br />
== 行星系統 ==<br />
2003年在HD 70642旁宣布發現一顆長週期[[系外行星]]。該行星是以距離母恆星3.232天文單位的圓形軌道（[[軌道離心率]]0.034）環繞母恆星<ref>{{cite journal | url=http://www.iop.org/EJ/article/1538-4357/593/1/L43/17479.html | author=Carter ''et al.'' | title=A Planet in a Circular Orbit with a 6 Year Period | journal=The [[Astrophysical Journal]] Letters | year=2003 | volume=593 | issue=1 | pages=L43–L46 | doi=10.1086/378185 | last2=Butler | first2=R. Paul | last3=Tinney | first3=C. G. | last4=Jones | first4=Hugh R. A. | last5=Marcy | first5=Geoffrey W. | last6=McCarthy | first6=Chris | last7=Fischer | first7=Debra A. | last8=Penny | first8=Alan J.|arxiv = astro-ph/0307066 |bibcode = 2003ApJ...593L..43C }}</ref>。因為HD 70642相當類似太陽，所以它的[[適居帶]]大約和太陽一樣在大約1天文單位處。[[氣體巨行星]]可以讓質量與地球相當的行星在距離母恆星約1天文單位處更穩定存在<ref>{{cite journal |author= HINSE T., MICHELSON R., JOERGENSEN U., GOZDIEWSKI K. & MIKKOLA S.|year= 2008 |title=Dynamics and stability of telluric planets within the habitable zone of extrasolar planetary systems - Numerical simulations of test particles within the HD 4208 and HD 70642 systems |journal=Astronomy & Astrophysics | issue=488 |pages=1133}}</ref>。這個行星系統是目前發現的所有行星系中最類似[[太陽系]]之一。<br />
<br />
{{OrbitboxPlanet begin<br />
| table_ref = <ref name="Butler">{{cite journal | url=http://www.iop.org/EJ/article/0004-637X/646/1/505/64046.html | author=Butler ''et al.'' | title=Catalog of Nearby Exoplanets | journal=The [[Astrophysical Journal]] | volume=646 | issue=1 | pages=505–522 | year=2006 | doi=10.1086/504701 | last2=Wright | first2=J. T. | last3=Marcy | first3=G. W. | last4=Fischer | first4=D. A. | last5=Vogt | first5=S. S. | last6=Tinney | first6=C. G. | last7=Jones | first7=H. R. A. | last8=Carter | first8=B. D. | last9=Johnson | first9=J. A. | bibcode=2006ApJ...646..505B | arxiv=astro-ph/0607493 | access-date=2012-06-29 | archive-date=2009-05-02 | archive-url=https://www.webcitation.org/5gTrfcenD?url=http://www.iop.org/EJ/article/0004-637X/646/1/505/64046.html | dead-url=no }}</ref>}}<br />
{{OrbitboxPlanet<br />
| exoplanet = [[HD 70642 b|b]]<br />
| mass = ≥1.97 ± 0.18<br />
| period = 2068 ± 39<br />
| semimajor = 3.23 ± 0.19<br />
| eccentricity = 0.034 ± 0.043<br />
}}<br />
{{Orbitbox end}}<br />
<br />
== 參見 ==<br />
* [[格利泽777]]<br />
* [[HD 28185]]<br />
* [[山案座π]]<br />
* [[確定存在的太陽系外行星列表]]<br />
<br />
== 參考資料 ==<br />
{{reflist}}<br />
<br />
== 外部連結 ==<br />
* [https://web.archive.org/web/20110605041634/http://www.extrasolar.net/startour.asp?StarCatId=normal&StarId=212 '''Extrasolar Vision''': HD 70642]<br />
* [http://www.solstation.com/stars2/hd70642.htm '''Solstation''': HD 70642 / CD-39 4247]{{Wayback|url=http://www.solstation.com/stars2/hd70642.htm |date=20200428193534 }}<br />
{{Sky|08|21|28.1361|-|39|42|19.474|93.8}}<br />
<br />
[[Category:G型主序星]]<br />
[[Category:HD和HDE天體|070642]]<br />
[[Category:HIP天體|040952]]<br />
[[Category:格利泽和GJ天体|0304]]<br />
[[Category:船尾座]]<br />
[[Category:行星系]]</div>
imported>Jimmy-bot