View source for NGC 7380

{{Short description|Open cluster in the constellation Cepheus}}
{{Infobox open cluster
 | name      = NGC 7380
 | image     = [[File:Wizard Nebula, NGC 7380.jpg|300px]]
 | caption   = NGC 7380 in classic Hubble Palette (Ha/OIII/SII) by amateur astronomer Chuck Ayoub
 | constellation = [[Cepheus (constellation)|Cepheus]]
 | epoch     = J2000.0
 | class     = 
 | ra        = {{RA|22|47|21.0}}<ref name=Wu2009/>
 | dec       = {{Dec|+58|07|54}}<ref name=Wu2009/>
 | dist_ly   = {{convert|2.6|±|0.4|kpc|kly|order=flip|abbr=on|lk=on}}<ref name=Chen2011/>
 | dist_pc   = 
 | appmag_v  = 7.2
 | size_v    = 25{{prime}}
 | mass_msol = 
 | radius_ly = ~{{convert|6|pc|ly|order=flip|abbr=on|lk=on}}
 | v_hb      = 
 | age       = 4<ref name=Chen2011/> to 11.9&nbsp;Myr<ref name=Wu2009/>
 | notes     = 
 | names     = {{odlist | NGC=7380 }},<ref name=SIMBAD/> Sh2-142, [[Collinder catalogue|Cr]] 452
}}

'''NGC 7380''' is a young<ref name=Lata2016/> [[open cluster]] of stars in the northern [[circumpolar constellation]] of [[Cepheus (constellation)|Cepheus]], discovered by [[Caroline Herschel]] in 1787. The surrounding emission nebulosity is known colloquially as the '''Wizard Nebula''', which spans an angle of {{val|25|ul=arcminute}}. German-born astronomer [[William Herschel]] included his sister's discovery in his catalog, and labelled it H VIII.77. The nebula is  known as S&nbsp;142 in the 1959 [[Sharpless catalog]] (Sh2-142).<ref name=Chen2011/> It is extremely difficult to observe visually, usually requiring very dark skies and an O-III filter. The NGC 7380 complex is located at a distance of approximately {{convert|2.6|kpc|kly|disp=out|abbr=off|lk=on}} from the [[Sun]], in the [[Perseus Arm]] of the [[Milky Way]].<ref name=Chen2011/>

The cluster spans ~{{convert|6|pc|ly|order=flip}} with an elongated shape and an extended tail.<ref name=Chen2011/> Age estimates range from 4<ref name=Chen2011/> to 11.9<ref name=Wu2009/>&nbsp;million years. At the center of the cluster lies [[DH Cephei]], a close, double-lined [[spectroscopic binary]] system consisting of two massive [[O-type star]]s. This pair are the primary ionizing source for the surrounding [[H II region]], and are driving out the surrounding gas and dust while triggering star formation in the neighboring region.<ref name=Lata2016/> Of the [[variable star]]s that have been identified in the cluster, 14 have been identified as [[pre-main sequence star]]s while 17 are [[main sequence star]]s that are primarily B-type variables.<ref name=Lata2016/>

==Gallery==
<gallery>
File:SH2-142HunterWilson.jpg|NGC 7380 in Hubble Palette (Ha/OIII/SII)
File:The Wizard Nebula.jpg|NGC 7380 from [[Wide-field Infrared Survey Explorer|WISE]].
File:NGC7380 Nebula from the Mount Lemmon SkyCenter Schulman Telescope courtesy Adam Block.jpg|NGC 7380 from the Mount Lemmon SkyCenter using the 0.8m Schulman Telescope.Broadband (RGB) image.
File:NGC7380_Nebula_from_South_Common_Observatory_courtesy_Richie_Jarvis.jpg|NGC7380 Nebula from South Common Observatory
</gallery>

==References==
{{reflist|refs=

<ref name=SIMBAD>{{cite simbad
 | title=NGC 7380 | access-date=2020-10-18 | postscript=. }}</ref>

<ref name=Chen2011>{{citation
 | title=A Kinematic and Photometric Study of the Galactic Young Star Cluster NGC 7380
 | display-authors=1 | last1=Chen | first1=W. P.
 | last2=Pandey | first2=A. K. | last3=Sharma | first3=Saurabh
 | last4=Chen | first4=C. W. | last5=Chen | first5=Li
 | last6=Sperauskas | first6=J. | last7=Ogura | first7=K.
 | last8=Chuang | first8=R. J. | last9=Boyle | first9=R. P.
 | journal=The Astronomical Journal | postscript=.
 | volume=142 | issue=3 | id=71 | pages=15 | date=September 2011
 | doi=10.1088/0004-6256/142/3/71 | bibcode=2011AJ....142...71C | s2cid=120469041 | doi-access=free }}</ref>

<ref name=Lata2016>{{citation
 | title=Variable stars in young open star cluster NGC 7380
 | last1=Lata | first1=Sneh | last2=Pandey | first2=A. K.
 | last3=Panwar | first3=Neelam | last4=Chen | first4=W. P.
 | last5=Samal | first5=M. R. | last6=Pandey | first6=J. C.
 | display-authors=1 | journal=Monthly Notices of the Royal Astronomical Society
 | volume=456 | issue=3 | pages=2505–2517 | date=March 2016
 | arxiv=1511.08892 | bibcode=2016MNRAS.456.2505L
 | doi=10.1093/mnras/stv2800 | doi-access=free | s2cid=118473907 | postscript=. }}</ref>

<ref name=Wu2009>{{citation | postscript=.
 | title=The orbits of open clusters in the Galaxy
 | last1=Wu | first1=Zhen-Yu | last2=Zhou | first2=Xu
 | last3=Ma | first3=Jun | last4=Du | first4=Cui-Hua
 | display-authors=1 | journal=[[Monthly Notices of the Royal Astronomical Society]]
 | volume=399 | issue=4 | pages=2146–2164 | date=November 2009
 | bibcode=2009MNRAS.399.2146W |arxiv = 0909.3737
 | doi=10.1111/j.1365-2966.2009.15416.x | doi-access=free
 | s2cid=6066790
 }}</ref>

}}

==External links==
{{commonscat}}
* {{WikiSky}}
* [https://web.archive.org/web/20161003105357/http://nebul.ae/component/joomgallery/nebula/ngc7380-wizard-nebula.html South Common Observatory - Images of the Wizard Nebula]
* [http://apod.nasa.gov/apod/ap111102.html NASA APOD mentioning the Wizard Nebula]
* [http://messier.seds.org/xtra/ngc/n7380.html SEDS] – NGC 7380

{{Sky|22|47|00|+|58|06|00|7200}}
{{Sh2 objects}}
{{Ngc75}}
{{Cepheus (constellation)}}

{{DEFAULTSORT:Ngc 7380}}
[[Category:NGC objects|7380]]
[[Category:Open clusters]]
[[Category:H II regions]]
[[Category:Cepheus (constellation)]]
[[Category:Astronomical objects discovered in 1787]]