imported>HMOXDSS1：回退HMOXDSS1（讨论）做出的出于善意的编辑

2025-03-26T10:18:35Z

回退HMOXDSS1（讨论）做出的出于善意的编辑

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{{Infobox open cluster
| image = [[Image:M93 Eguivar.jpg|300px]]
| caption = 在船尾座的疏散星團。
| name = 梅西耶93（M93）
| epoch = J2000.0
| class = I,3,r
| constellation = [[船尾座]]
| ra = {{RA|07|44|30.0}}<ref name=Wu2009/>
| dec = {{Dec|−23|51|24}}<ref name=Wu2009/>
| dist_ly = {{cvt|1.037|kpc|kly|order=flip|lk=on}}<ref name=Wu2009/>
| appmag_v = 6.0<ref>{{cite web |url=https://messier.seds.org/m/m093.html |title=Messier 93 |access-date=30 April 2022 |website=SEDS Messier Catalog |archive-date=2023-06-04 |archive-url=https://web.archive.org/web/20230604230630/https://www.messier.seds.org/m/m093.html |dead-url=no }}</ref>
| size_v = 10′<ref name=Finlay2014/>
| mass_msol = 723<ref name=Piskunov2008/>
| radius_ly = 5<ref name=Finlay2014/>
| age = 387.3 Myr<ref name=Wu2009/>
| notes =
| names = [[NGC天體表|NGC]] 2447、[[科林德目錄|Cr]] 160, OCl 649.0 <ref name=simbad/>
}}

'''梅西耶93'''或'''M93'''，也稱為'''NGC 2447'''，是位於南天[[星座]][[船尾座]]中的一個[[疏散星團]]。[[船尾座]]是從廢棄的[[南船座]]中拆解出來的星座。

== 觀察史和外觀 ==
它是由[[查爾斯·梅西耶]]發現的，然後在1781年被添加到他的類[[彗星]]天體目錄中{{efn|On March 20}}<ref name=Frommert2007/>。[[威廉·赫歇爾]]的妹妹[[卡羅琳·赫歇爾]]在1783年獨立發現了它，認為它還沒有被梅西耶編目<ref name=Hoskin2016/>。

[[沃爾特·史考特·休斯頓]]（1993年辭世）描述了它的外觀<ref name="WSH"/>：
<blockquote>一些觀察者提到這個星團具有海星的形狀。使用一個適當大小的望遠鏡，這是它在沉悶的夜晚出現，但[一架四英寸的折射鏡]顯示它是一個典型的星光熠熠的銀河星團。</blockquote>

== 性質 ==
它的[[疏散星團#型態和分類|川普勒分類]]為I 3 r，表明它高度集中（I），亮度範圍大（3），富含恆星（r）<ref name=Maitzen1993/>。

M93距離[[地球]]大約3,380[[光年]]<ref name=Wu2009/>，在空間中的半徑從[[太陽半徑]]到5光年<ref name=Finlay2014/>，[[球狀星團#半徑|潮汐半徑]]為{{Val|13.1|2.3|u=ly}}<ref name=Piskunov2008/>，和核心半徑為{{cvt|1.3|pc|ly|order=flip|disp=out}}<ref name=Piskunov2007/>。它的年齡估計為3億8730萬年<ref name=Wu2009/>，它幾乎位於[[銀河平面]]上，其軌道與[[銀心|銀河核心]]在{{cvt|8.5|–|8.9|kpc|kly|order=flip}}之間變動，軌道週期超過 {{Val|242.7|7.9}}百萬年<ref name=Wu2009/>。

在M93中發現了54顆[[變星]]，包括一顆[[慢脈動B型變星]]，一顆[[旋轉橢球變星]]，七顆[[矮造父變星|盾牌座δ型變星]]，六顆[[劍魚座γ型變星]]和一顆雜交δ{{efn|Delta Scuti}} Sct/γ Dor{{efn| Gamma Doradus}}脈動器<ref name=Eyer2010/>。還有四個[[聯星#光譜聯星|光譜聯星]]系統，包括一個[[藍離散星|黃離散星]]組件<ref name=Silveira2018/>。

== 圖集 ==
<gallery>
Image:Messier object 093.jpg|梅西耶93圖集圖像
Image:M93map.png|M93的尋星圖
</gallery>

== 相關條目 ==
* [[梅西耶天體列表]]

== 參考資料 ==
{{reflist|refs=

<ref name=simbad>{{cite simbad | title=NGC 2447 | access-date=2018-12-06 }}</ref>

<ref name=Maitzen1993>{{citation
| title=Photoelectric Search for Peculiar Stars in Open Clusters - Part Fourteen - NGC1901 NGC2169 NGC2343 CR:132 NGC2423 and NGC2447
| last1=Maitzen | first1=H. M.
| journal=Astronomy and Astrophysics Supplement
| volume=102 | issue=1 | page=1 | date=November 1993
| bibcode=1993A&AS..102....1M | postscript=. }}</ref>

<ref name=Frommert2007>{{citation
| first1=Hartmut
| last1=Frommert
| first2=Christine
| last2=Kronberg
| title=Messier 93
| work=SEDS Messier pages
| publisher=Students for the Exploration and Development of Space (SEDS)
| date=September 2, 2007
| url=http://www.messier.seds.org/m/m093.html
| access-date=2018-12-07
| postscript=.
| archive-date=2018-10-14
| archive-url=https://web.archive.org/web/20181014104625/http://www.messier.seds.org/m/m093.html
| dead-url=no
}}</ref>

<ref name="WSH">{{cite book
| last = Houston
| first = Walter Scott
| author-link=Walter Scott Houston
| title = Deep-Sky Wonders
| publisher = Sky Publishing Corporation
| year = 2005
| isbn = 978-1-931559-23-2}}</ref>

<ref name=Wu2009>{{Citation | display-authors=1
| last1=Wu | first1 = Zhen-Yu | last2=Zhou | first2 = Xu
| last3=Ma | first3 = Jun | last4=Du | first4 = Cui-Hua
| title=The orbits of open clusters in the Galaxy
| journal=[[Monthly Notices of the Royal Astronomical Society]]
| volume=399 | issue=4 | pages=2146–2164 | date=November 2009
| arxiv=0909.3737 | bibcode=2009MNRAS.399.2146W
| doi=10.1111/j.1365-2966.2009.15416.x | postscript=. }}</ref>

<ref name=Eyer2010>{{citation
| contribution=Time resolved surveys of stellar clusters
| last1=Eyer | first1=L. | last2=Eggenberger | first2=P.
| last3=Greco | first3=C. | last4=Saesen | first4=S.
| last5=Anderson | first5=R. I. | last6=Mowlavi | first6=N.
| title=JENAM 2010, Joint European and National Astronomy Meeting held 6-10 September, 2010 in Lisbon Portugal
| pages=212 | date=September 2010 | id=212
| bibcode=2010jena.confE.212E | postscript=. }}</ref>

<ref name=Silveira2018>{{citation
| title=Red giants and yellow stragglers in the young open cluster NGC 2447
| last1=da Silveira | first1=M. D. | last2=Pereira | first2=C. B.
| last3=Drake | first3=N. A. | display-authors=1
| journal=Monthly Notices of the Royal Astronomical Society
| volume=476 | issue=4 | pages=4907–4931 | date=June 2018
| doi=10.1093/mnras/sty265 | bibcode=2018MNRAS.476.4907D }}</ref>

<ref name=Finlay2014>{{citation
| title=Concise Catalog of Deep-Sky Objects: Astrophysical Information for 550 Galaxies, Clusters and Nebulae
| series=The Patrick Moore Practical Astronomy Series
| first1=Warren H. | last1=Finlay
| edition=2nd | publisher=Springer
| year=2014 | isbn=978-3319031705 | page=120
| url=https://books.google.com/books?id=eJDIAwAAQBAJ&pg=PA120 }}</ref>

<ref name=Piskunov2008>{{citation
| display-authors=1 | last1=Piskunov | first1=A. E.
| last2=Schilbach | first2=E. | last3=Kharchenko | first3=N. V.
| last4=Röser | first4=S. | last5=Scholz | first5=R.-D.
| title=Tidal radii and masses of open clusters
| journal=Astronomy and Astrophysics | postscript=.
| volume=477 | issue=1 | pages=165–172 | date=January 2008
| doi=10.1051/0004-6361:20078525 | bibcode=2008A&A...477..165P | doi-access=free }}</ref>

<ref name=Piskunov2007>{{citation
| title=Towards absolute scales for the radii and masses of open clusters
| last1=Piskunov | first1=A. E. | last2=Schilbach | first2=E.
| last3=Kharchenko | first3=N. V. | last4=Röser | first4=S.
| last5=Scholz | first5=R. -D. | display-authors=1
| journal=Astronomy and Astrophysics | postscript=.
| volume=468 | issue=1 | pages=151–161 | date=June 2007
| doi=10.1051/0004-6361:20077073 | bibcode=2007A&A...468..151P | arxiv=astro-ph/0702517 }}</ref>

<ref name=Hoskin2016>{{citation
| title=Gazing at the starry heavens
| first1=Michael | last1=Hoskin
| journal=Astronomy & Geophysics
| volume=57 | issue=1 | date=February 1, 2016 | pages=1.22–1.25
| doi=10.1093/astrogeo/atw038 | bibcode=2016A&G....57a1.22H | doi-access=free }}</ref>

}}
{{notelist}}

== 外部連結 ==
{{commonscat}}
* [http://messier.seds.org/m/m093.html SEDS: Open Star Cluster M93] {{Wayback|url=http://messier.seds.org/m/m093.html |date=20150303151707 }}
* {{WikiSky}}
* {{cite web | last=Gray | first=Meghan | last2=Zarnecki | first2=John | author-link2=John Zarnecki | title=M93 – Open Cluster | access-date=2018-12-05 | work=Deep Sky Videos | publisher=[[Brady Haran]] | url=http://www.deepskyvideos.com/videos/messier/M93_open_cluster.html | archive-date=2023-02-19 | archive-url=https://web.archive.org/web/20230219054155/http://www.deepskyvideos.com/videos/messier/M93_open_cluster.html | dead-url=no }}

{{Sky|07|44.6|00|-|23|52|00|3600}}

{{Portal bar|天文學|恆星|太空}}
{{梅西耶天體}}
{{Ngc25}}

[[Category:疏散星團|M093]]
[[Category:獵戶臂]]
[[Category:船尾座|M093]]
[[Category:梅西耶天體|093]]
[[Category:NGC天體|M093]]
[[Category: 1781年發現的天體]]

M93 - 版本历史

imported>HMOXDSS1：​回退HMOXDSS1（讨论）做出的出于善意的编辑

imported>HMOXDSS1：回退HMOXDSS1（讨论）做出的出于善意的编辑