View source for LEDA 74886

{{Short description|Dwarf galaxy in the constellation Eridanus with a rectangular shape}}
{{Infobox galaxy
| name               = LEDA 74886
| image              = LEDA 074886.jpg
| image_size         = 200px
| caption = False color image of galaxy LEDA 74886, taken by the [[Subaru Telescope]]. The contrast of this image has been adjusted to highlight the internal disk/bar like structure.
| credit             = Alister Graham, [[Subaru Telescope]], [[National Astronomical Observatory of Japan]] (NAOJ)
| epoch              = [[J2000]]
| constellation name = [[Eridanus (constellation)|Eridanus]]
| ra                 = {{RA|03|40|43.233}}<ref name=SIMBAD>{{cite simbad|title=6dFGS gJ034043.2-183843|access-date=20 March 2012}}</ref>
| dec                = {{DEC|-18|38|43.10}}<ref name=SIMBAD/>
| dist_ly            = {{convert|70000|kly|kpc|abbr=on|lk=on}} {{hub|0.73}}
| group_cluster      = [[NGC 1407]]<ref name=paper/>
| type               = S0 <ref name=NED>NED, [http://ned.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=LEDA+074886&extend=no&hconst=73&omegam=0.27&omegav=0.73&corr_z=1&out_csys=Equatorial&out_equinox=J2000.0&obj_sort=RA+or+Longitude&of=pre_text&zv_breaker=30000.0&list_limit=5&img_stamp=YES LEDA 074886] (accessed 20 March 2012)</ref>
| mass               = 1{{e|9}}
| names              = [[2MASX]] J03404323-1838431, [[6dFGS]] gJ034043.2-183843<ref name=SIMBAD/>
}}

'''LEDA 74886''', also known by its [[2MASX]] designation '''2MASX J03404323-1838431''', and sometimes known as the '''Emerald-cut Galaxy''',<ref>{{cite web |last1=Major |first1=Jason |title=Rare Rectangle Galaxy Discovered |url=https://www.universetoday.com/94241/rare-rectangle-galaxy-discovered/ |website=[[Universe Today]] |publisher=www.universetoday.com |access-date=27 October 2021 |date=20 March 2012}}</ref> is a [[dwarf galaxy]] with a rare rectangular shape.<ref name=paper/> It is located at a distance of about {{Convert|70000000|ly|Mpc}} in the [[Eridanus (constellation)|Eridanus]] [[constellation]].<ref name="NG">{{cite news|url=http://news.nationalgeographic.com/news/2012/03/120320-rectangular-galaxy-emerald-cut-diamond-subaru-space-science/|archive-url=https://web.archive.org/web/20120322055739/http://news.nationalgeographic.com/news/2012/03/120320%2Drectangular%2Dgalaxy%2Demerald%2Dcut%2Ddiamond%2Dsubaru%2Dspace%2Dscience/|url-status=dead|archive-date=March 22, 2012|title=Rare "Emerald Cut" Galaxy Found|journal=National Geographic News| author=Rachel Kaufman|date=March 20, 2012|access-date = March 21, 2012}}</ref> The galaxy was detected in a wide [[field of view]] image taken by the [[Subaru Telescope]] using the Subaru Prime Focus Camera (Suprime-Cam).<ref name="AS">{{cite news|url=http://www.asianscientist.com/in-the-lab/leda-074886-emerald-cut-diamond-shape-galaxy/|title=Astronomers Discover Galaxy That Resembles An Emerald-Cut Diamond|newspaper=Asian Scientist|date=March 20, 2012|access-date=March 21, 2012}}</ref><ref>{{cite press release|url=http://www.naoj.org/Pressrelease/2012/03/19/index.html|title=Surprising Discovery of a Rare "Emerald-Cut" Galaxy|publisher=[[Subaru Telescope]]—[[National Astronomical Observatory of Japan]]|date=March 19, 2012|access-date=March 23, 2012}}</ref> Using the [[Keck Telescope]], a thin [[galactic disc|disc]] with a side on orientation was confirmed to be lurking at the center of LEDA 74886, and spinning at a speed of 33 km/s at the orbital radius of half a kpc.<ref name=paper/> LEDA 74886 has a mass of around 10<sup>9</sup> [[Solar mass|<var>M</var><sub>☉</sub>]] (Compared to the [[Milky Way]]'s mass of about 10<sup>12</sup> [[Solar mass|<var>M</var><sub>☉</sub>]]).

==Location==
LEDA 74886 is located in the [[celestial sphere]] at a [[right ascension]] (<math>\alpha</math>) of {{RA|03|40|43.2}}, and a [[declination]] (<math>\delta</math>) of {{DEC|-18|38|43}} ([[J2000]]). It is located within the [[Galactic corona]] of [[NGC 1407]], a massive [[spherical galaxy]] which is located approximately 163,000 ly (50 kpc) to the northwest of LEDA 74886.<ref name=paper>{{Cite journal|arxiv=1203.3608|journal=The Astrophysical Journal|volume=750|issue=2|pages=121|date=March 19, 2012|last1= Graham|first1=Alister W.|last2= Spitler|first2=Lee R.|last3= Forbes|first3=Duncan A.|last4=Lisker|first4=Thorsten|last5=Moore|first5=Ben|last6=Janz|first6=Joachim|title=Leda 074886: A Remarkable Rectangular-Looking Galaxy |doi=10.1088/0004-637X/750/2/121|bibcode = 2012ApJ...750..121G |s2cid=28425342 }}</ref>

==See also==
*[[SDSS J074018.17+282756.3]] is a spiral galaxy with arms that have a somewhat squarish-looking interior, but is distinct from LEDA 74886, because LEDA 74886 has no apparent spiral structure and a boxy like exterior form.<ref name=paper/>
*[[Sextans A]], a member of the [[Local Group|local group]], has a box like form due to its expanding shell of young blue stars, but it has a much lower mass and density, and includes a central disc which LEDA 74886 does not include.<ref name=paper/>
* [[NGC 4488]]
[[File:LEDA 74886 color cutout rings.v3.skycell.0893.033.stk.4159812.4157025.4152550.unconv.fits sci.jpg|thumb|A color cut-out image of LEDA 74886]]

==References==
{{reflist}}

{{Eridanus (constellation)}}
{{2012 in space}}

{{DEFAULTSORT:LEDA 74886}}
[[Category:Eridanus (constellation)]]
[[Category:Lenticular galaxies]]
[[Category:LEDA objects|074886]]