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{{Infobox galaxy
| name = [[NGC天體表|NGC]] 55
| image = File:Irregular Galaxy NGC 55 (ESO 0914a).jpg
| caption = [[拉西亞天文台]]拍攝的不規則星系NGC 55
| epoch = [[J2000]]
| constellation name = [[玉夫座]]<ref name="sinnott1988">
{{cite book
| editor=R. W. Sinnott
| title= The Complete New General Catalogue and Index Catalogue of Nebulae and Star Clusters by J. L. E. Dreyer
| url=https://archive.org/details/ngc20000complete0000drey
| date=1988
| publisher=Sky Publishing Corporation and Cambridge University Press
| isbn=978-0-933346-51-2
}}</ref>
| type = SB(s)m<ref name="ned">{{cite web
| title=NASA/IPAC Extragalactic Database
| work=Results for NGC 55
| url=http://nedwww.ipac.caltech.edu/
| access-date=2006-10-17
| archive-date=2000-10-19
| archive-url=https://web.archive.org/web/20001019032134/http://nedwww.ipac.caltech.edu/
| dead-url=no
}}</ref>
| ra = {{RA|00|14|53.6}}<ref name="ned" />
| dec = {{DEC|-39|11|47.9}}<ref name="ned" />
| z = 0.000437<ref name="ned" />
| h_radial_v = 131 ± 2 km/s<ref name="ned" />
| dist_ly = 650 ± 65萬[[光年]] （2.00 ± 0.2 [[秒差距|Mpc]]）<ref name="Karachentsevetal2006" /><ref name = "vandesteeneetal2006" />
{{Ref label|A|a|none}}
| appmag_v = 7.87<ref name="SIMBAD-NGC55">
{{cite simbad
|title=NGC 55
|access-date=2009-11-29
}}</ref><ref name=GAXEL>
{{cite journal
|last=Armando |first=Gil de Paz
|display-authors=etal
|date=2007
|title=The GALEX Ultraviolet Atlas of Nearby Galaxies
|journal=[[Astrophysical Journal Supplement Series]]
|volume=173 |issue=2 |pages=185–255
|arxiv=astro-ph/0606440
|doi=10.1086/516636
|bibcode = 2007ApJS..173..185G |s2cid=119085482
}}</ref>
| size_v = {{Val|32.4|×|5.6|u=arcminute}}<ref name="ned" />
| size=~{{convert|20.99|kpc|ly|abbr=on|lk=on|order=flip}} (estimated)<ref name ="ned" />
| mass = (2.0 ± 0.4) × 1010
| names = [[主要星系目錄|PGC]] 1014<ref name="ned" />、[[科德韋爾深空天體表|Caldwell]] 72、[[2微米全天巡天|2MASS]] J00145360-3911478、[[紅外線天文衛星|IRAS]] F00124-3929、[[歐洲南方天文台|ESO]] 293-50、[[星系形態目錄|MCG]] -07-01-013<ref name="SIMBAD-NGC55"/>
}}

'''NGC 55'''也稱為'''珍珠串星系'''（{{langx|en|String of Pearls Galaxy}}）<ref name="interstellarum">{{cite book|last=Stoyan|first=Ronald|last2=Schurig|first2=Stephan|title=interstellarum Deep Sky Atlas|publisher=Cambridge University Press; Oculum-Verlag GmbH|publication-place=Erlangen|date=2014|isbn=978-1-107-50338-0|oclc=920437579|url=http://www.deep-sky-atlas.com/}}</ref>，是位於[[星座]][[玉夫座]]的一個[[麥哲倫螺旋星系|麥哲倫型]][[棒旋星系]]，距離我們約650萬[[光年]]。天文學家[[詹姆士·敦洛普]]於1826年7月7日發現了它<ref name="cseligman" />。它和它的鄰居[[NGC 300]]一樣，是離[[本星系群]]最近的星系之一，可能位於[[銀河系]]和[[玉夫座星系群]]之間<ref name="cseligman">{{Cite web|url=http://cseligman.com/text/atlas/ngc0a.htm#55|title=New General Catalog Objects: NGC 50 - 99|website=cseligman.com|language=en-US|access-date=2017-12-12|archive-date=2018-10-24|archive-url=https://web.archive.org/web/20181024090905/http://cseligman.com/text/atlas/ngc0a.htm#55|dead-url=no}}</ref>，估計其質量為（2.0 ± 0.4）× 1010{{solar mass}}<ref>{{Cite journal|title=Gas and dark matter in the Sculptor group: NGC 55|year=2013|doi=10.1093/mnras/stt1271|url=https://academic.oup.com/mnras/article/434/4/3511/964482|last1=Westmeier|first1=T.|last2=Koribalski|first2=B. S.|last3=Braun|first3=R.|journal=Monthly Notices of the Royal Astronomical Society|volume=434|issue=4|pages=3511–3525|doi-access=free|arxiv=1307.2962|access-date=2024-09-23|archive-date=2022-11-11|archive-url=https://web.archive.org/web/20221111153428/https://academic.oup.com/mnras/article/434/4/3511/964482|dead-url=no}}</ref>。

== 附近星系和星系群資訊 ==
NGC 55和[[螺旋星系]][[NGC 300]]傳統上被認定為[[玉夫座星系群]]的成員，這是同名星座中附近的[[星系群]]。然而，最近的距離量測表明，這兩個星系實際上只是前景星系<ref name="karachentsevetal2003">
{{cite journal
| author=I. D. Karachentsev
| display-authors=etal
| title=Distances to nearby galaxies in Sculptor
| journal=[[Astronomy and Astrophysics]]
| date=2003
| volume=404 | issue=1 | pages=93–111
| bibcode=2003A&A...404...93K
| doi=10.1051/0004-6361:20030170
|arxiv = astro-ph/0302045 | s2cid=54977869
}}</ref>。

NGC 55和NGC 300很可能形成一對引力束縛對<ref name = "vandesteeneetal2006">
{{Cite journal
| last1 = van de Steene | first1 = G. C.
|display-authors=etal
| title = Distance determination to NGC 55 from the planetary nebula luminosity function
| journal = [[Astronomy and Astrophysics]]
| date = 2006
| volume = 455 | issue = 3 | pages = 891–896
| bibcode = 2006A&A...455..891V
| doi = 10.1051/0004-6361:20053475
| doi-access = free
}}</ref>。

== 視覺外觀 ==
《{{link-en|韋伯學會深空觀察者手册|Webb Society Deep-Sky Observer's Handbook}}》<ref name="Webb">
{{cite book | last = Jones | first = K. G. | title = Webb Society Deep-Sky Observer's Handbook | publisher = Enslow Publishers | date = 1981 | ol = 8249797M | isbn = 978-0-89490-134-8 | url-access = registration | url = https://archive.org/details/webbsocietydeeps00kenn}}</ref>對NGC 55寫了如下的描述：「近邊緣，不對稱，凸起附近有一些塵埃的迹象，凸起呈彌漫狀，寬闊，有些細長，南緣鋒利；在凸起的東南部，它强烈彎曲，並排列著4或5個微弱的節；曲線的北緣很陡。」[[小羅伯特·伯納姆|伯納姆]]稱其為「南方天空中傑出的星系之一」，有點像[[大麥哲倫星雲]]的縮小版<ref name="burnham">
{{cite book |author = Robert Burnham Jr. |title = Burnham's Celestial Handbook |volume = III |date = 1978 |publisher = Dover |location = New York |isbn = 978-0-486-24065-7 |page = [https://archive.org/details/burnhamscelestia03burn/page/1733 1733] |url = https://archive.org/details/burnhamscelestia03burn/page/1733}}</ref>。

== 相關條目 ==
* [[NGC 4236]]
* [[NGC 4631]]
* [[NGC天體列表 (2000-2999)]]

== 註解 ==
{{refbegin}}
<ol type="a">
<li>{{Note label|A|a|none}}平均(6.9 ± 0.7,<ref name="Karachentsevetal2006">
{{cite journal
| author=Karachentsev, I. D.
| author2=Kashibadze, O. G.
| title=Masses of the local group and of the M81 group estimated from distortions in the local velocity field
| journal=[[Astrophysics (journal)|Astrophysics]]
| date=2006
| volume=49 | issue=1 | pages=3–18
| bibcode=2006Ap.....49....3K
| doi=10.1007/s10511-006-0002-6
| s2cid=120973010
}}</ref>7.5 ± 1.1<ref name = "vandesteeneetal2006" />) = ((6.9 + 7.5) / 2) ± ((0.72 + 1.12)0.5 / 2) = 7.2 ± 0.7</li>
</ol>
{{refend}}

== 參考資料 ==
{{Reflist}}

== 外部連結 ==
{{commons category|NGC 55}}
* [http://www.astrosurf.com/antilhue/ngc_55.htm NGC 55 in Sculptor] {{Wayback|url=http://www.astrosurf.com/antilhue/ngc_55.htm |date=20061229042530 }}
* [https://web.archive.org/web/20060220024252/http://www.seds.org/~spider/spider/LG/n0055.html ''SEDS'': Spiral Galaxy NGC 55]
* {{WikiSky}}

{{玉夫座恆星}}
{{Ngc5}}
{{Catalogs|NGC=55|PGC=1014}}
{{科德韋爾天體}}
{{Sky|00|14|53.6|-|39|11|48|7200000}}

{{DEFAULTSORT:NGC 0055}}
[[Category:麥哲倫螺旋星系|NGC 0055]]
[[Category:棒旋星系|NGC 0055]]
[[Category:玉夫座|NGC 0055]]
[[Category:NGC天體|0055]]
[[Category:MCG天體|-07-01-013]]
[[Category:PGC天體|001014]]
[[Category:科德韋爾天體|072b]]
[[Category:1826年發現的天體|18260707]]
[[Category:室女座超星系團]]
[[Category:詹姆士·敦洛普發現的天體]]

NGC 55 - 版本历史

imported>Willy1018-bot：​BOTR：批量替換所有lang-xx模板為langx模板

imported>Willy1018-bot：BOTR：批量替換所有lang-xx模板為langx模板