Editing Leda (moon)

{{Short description|Outer moon of Jupiter}}
{{for|the main belt asteroid|38 Leda}}
{{use dmy dates|date=November 2020}}
{{Infobox planet
 | name            = Leda
 | image           = Leda2(moon).jpg
 | image_scale      =
 | caption         = Discovery image of Leda taken by the [[Palomar Observatory]] in 1974
 |pronounced       = {{IPAc-en|ˈ|l|iː|d|ə}}<ref>{{Cite dictionary |url=http://www.lexico.com/definition/Leda |archive-url=https://web.archive.org/web/20210508022241/https://www.lexico.com/definition/leda |url-status=dead |archive-date=8 May 2021 |title=Leda |dictionary=[[Lexico]] UK English Dictionary |publisher=[[Oxford University Press]]}}</ref> 
 |adjective        = Ledian {{IPAc-en|ˈ|l|iː|d|i|ə|n}},<ref>Ken Monteith (2007) ''Yeats and theosophy'', p. 10</ref> Ledean {{IPAc-en|ˈ|l|iː|d|i|ə|n}}<ref>Wit Pietrzak (2011) ''Myth, Language and Tradition: A Study of Yeats, Stevens, and Eliot in the Context of Heidegger's Search for Being,'' p. 70–72</ref> or {{IPAc-en|l|iː|ˈ|d|iː|ə|n}}<ref>R.W. Chapman (1939) ''Adjectives from Proper Names'', p. 55</ref>
 |named_after      = [[Leda (mythology)|Λήδα]] ''Lēdā''
 | mpc_name        = Jupiter XIII
 | alt_names       = 
 | discovery_ref   = <ref name="Kowal1974"/>
 | discoverer      = [[Charles T. Kowal]]
 | discovery_site  = [[Palomar Observatory]]
 | discovered      = 14 September 1974
 | earliest_precovery_date = 
 | satellite_of    = [[Jupiter]]
 | group           = [[Himalia group]]
 | orbit_ref       = <ref name="MPC128893"/>
 | epoch           = 16 February 2017 ([[Julian day|JD]] 2457800.5)
 | observation_arc = 42.60 [[Julian year (astronomy)|yr]] (15,561 days)
 | semimajor       = {{cvt|0.0748405|AU|km|lk=in}}
 | eccentricity    = 0.1648788
 | period          = +242.02 d
 | mean_anomaly    = 137.02571[[Degree (angle)|°]]
 | mean_motion     = {{Deg2DMS|1.48748702|sup=ms}} / day
 | inclination     = 27.63631° (to [[ecliptic]])
 | asc_node        = 190.18497°
 | arg_peri        = 312.92965°
 | mean_diameter   = {{val|21.5|1.7|u=km}}<ref name="Grav2015"/>
 | mass            = 
 | density         = <!-- assumed density of 2.6 g/cm3 from JPL -->
 | surface_grav    = 
 | escape_velocity = 
 | rotation        =
 | albedo          = {{val|0.034|0.006}}<ref name="Grav2015"/>
 | spectral_type   = B–V = 0.66 ± 0.01, V–R = 0.43 ± 0.01<ref name="GraykowskiJewitt2018">{{Cite journal |last1=Graykowski |first1=Ariel |last2=Jewitt |first2=David |date=2018-04-05 |title=Colors and Shapes of the Irregular Planetary Satellites |journal=The Astronomical Journal |language=en |volume=155 |issue=4 |pages=184 |doi=10.3847/1538-3881/aab49b |issn=1538-3881 |doi-access=free|arxiv=1803.01907 |bibcode=2018AJ....155..184G }}</ref>
 | magnitude       = 20.2<ref name="SheppardMoons"/>
 | abs_magnitude   = 12.7<ref name="MPC128893"/>
}}

'''Leda''' {{IPAc-en|ˈ|l|iː|d|ə}}, also known as '''{{nowrap|Jupiter XIII}}''', is a [[Retrograde motion|prograde]] [[irregular satellite]] of [[Jupiter]]. It was discovered by [[Charles T. Kowal]] at the [[Mount Palomar Observatory]] on September 14, 1974, after three nights' worth of photographic plates had been taken (September 11 through 13; Leda appears on all of them).<ref name="Kowal1974"/><ref name="IAUC 2702">{{cite web |author=Brian G. Marsden |url=http://www.cbat.eps.harvard.edu/iauc/02700/02702.html |title=IAUC 2702: Probable New Satellite of Jupiter |date=September 20, 1974 |publisher=[[International Astronomical Union]]}}</ref> It was named after [[Leda (mythology)|Leda]], who was raped<ref>[https://poets.org/poem/leda-and-swan Leda and the Swan]</ref> by [[Zeus]], the Greek equivalent of [[Jupiter (god)|Jupiter]] (who came to her in the form of a [[swan]]). Kowal suggested the name and the IAU endorsed it in 1975.<ref name="IAUC 2846">{{cite web | last=Marsden |first=Brian G. |title=Satellites of Jupiter |publisher=International Astronomical Union |volume=2846 |date=October 7, 1975 |url=http://www.cbat.eps.harvard.edu/iauc/02800/02846.html}}</ref>

Leda belongs to the [[Himalia group]], moons orbiting between 11 and 13 Gm from Jupiter at an inclination of about 27.5°.<ref name="Jacobson 2000">{{cite journal |last=Jacobson |first=R. A. |author-link=Robert A. Jacobson |title=The orbits of outer Jovian satellites |journal=Astronomical Journal |date=2000 |volume=120 |issue=5  |pages=2679–2686 |doi=10.1086/316817 |bibcode=2000AJ....120.2679J|s2cid=120372170 |url=https://trs.jpl.nasa.gov/bitstream/2014/15175/1/00-1187.pdf }}</ref> The orbital elements given here are as of January 2021, but they are continuously changing due to [[Sun|solar]] and planetary perturbations.

[[File:Leda WISE-W3.jpg|thumb|left|upright|Single-exposure image of Leda by the [[Wide-field Infrared Survey Explorer]] (WISE) spacecraft in 2010]]

{{clear|left}}

==See also==
*[[Jupiter's moons in fiction]]

==References==
{{reflist|refs=

<ref name="MPC128893">{{cite web
  |title      = M.P.C. 128893
  |url        = https://minorplanetcenter.net/iau/ECS/MPCArchive/2021/MPC_20210127.pdf
  |work       = Minor Planet Circular
  |publisher  = Minor Planet Center
  |date       = 27 January 2021}}</ref>

<ref name="SheppardMoons">{{cite web
  |title      = Scott S. Sheppard - Jupiter Moons
  |url        = https://sites.google.com/carnegiescience.edu/sheppard/moons/jupitermoons
  |last       = Sheppard |first = Scott
  |work       = Department of Terrestrial Magnetism 
  |publisher  = Carnegie Institution for Science
  |access-date = 26 November 2020}}</ref>

<ref name="Kowal1974">{{cite journal |last=Kowal |first=C. T. |author2=Aksnes, K. |author3=Marsden, B. G. |author4= Roemer, E.  |title=Thirteenth satellite of Jupiter |journal=Astronomical Journal |date=1974 |volume=80 |pages=460–464 |url=http://adsabs.harvard.edu//full/seri/AJ.../0080//0000460.000.html |doi=10.1086/111766 |bibcode=1975AJ.....80..460K|doi-access=free }}</ref>

<ref name="Grav2015">{{cite journal
  |display-authors = etal
  |first1     = T. |last1 = Grav
  |first2     = J. M. |last2 = Bauer
  |first3     = A. K. |last3 = Mainzer
  |first4     = J. R. |last4 = Masiero
  |first5     = C. R. |last5 = Nugent
  |first6     = R. M. |last6 = Cutri
  |date       = August 2015
  |title      = NEOWISE: Observations of the Irregular Satellites of Jupiter and Saturn
  |journal    = The Astrophysical Journal
  |volume     = 809
  |issue      = 1
  |id         = 3
  |pages      = 9
  |doi        = 10.1088/0004-637X/809/1/3
  |arxiv = 1505.07820 |bibcode    = 2015ApJ...809....3G|s2cid = 5834661 |url = https://authors.library.caltech.edu/61254/1/Grav_2015.pdf }}</ref>

}}

==External links==
*[https://web.archive.org/web/20170212001844/http://solarsystem.nasa.gov/planets/leda Leda Overview] by [http://solarsystem.nasa.gov NASA's Solar System Exploration]
*[https://web.archive.org/web/20060901072706/http://www.ifa.hawaii.edu/~jewitt/irregulars.html David Jewitt pages]
*[https://web.archive.org/web/20150318034833/http://home.dtm.ciw.edu/users/sheppard/satellites/jupsatdata.html Jupiter's Known Satellites] (by [[Scott S. Sheppard]])

{{Moons of Jupiter}}

{{DEFAULTSORT:Leda (Moon)}}
[[Category:Himalia group]]
[[Category:Moons of Jupiter]]
[[Category:Irregular satellites]]
[[Category:Discoveries by Charles T. Kowal]]
[[Category:Astronomical objects discovered in 1974|19740911]]
[[Category:Moons with a prograde orbit]]
[[Category:Leda (mythology)]]