View source for Hermippe (moon)

{{Short description|Moon of Jupiter}}
{{Use dmy dates|date=November 2020}}
{{Infobox planet
 | name            = Hermippe
 | image           = Ερμίππη.gif
 | caption         = Discovery image of Hermippe by the [[Canada-France-Hawaii Telescope]] in December 2001
 | pronounced      = {{IPAc-en|h|ɜːr|ˈ|m|ɪ|p|iː}}<ref>cf. Hermippus in Noah Webster (1884) ''A Practical Dictionary of the English Language''</ref>
 | adjective       = Hermippean {{IPAc-en|h|ɜːr|m|ᵻ|ˈ|p|iː|ə|n}}
 | named_after     = [[Hermippe|Ἑρμίππη]] ''Hermippē''
 | mpc_name        = Jupiter XXX
 | alt_names       = S/2001 J 3
 | discovery_ref   = <ref name="MPEC-2002-J54"/>
 | discoverer      = [[Scott S. Sheppard]]<br/>[[David C. Jewitt]]<br/>[[Jan Kleyna|Jan T. Kleyna]]
 | discovery_site  = [[Mauna Kea Observatory]]
 | discovered      = 9 December 2001
 | earliest_precovery_date = 
 | satellite_of    = [[Jupiter]]
 | group           = [[Ananke group]]
 | orbit_ref       = <ref name="MPC127087"/>
 | epoch           = 17 December 2020 ([[Julian day|JD]] 2459200.5)
 | observation_arc = 15.29 [[Julian year (astronomy)|yr]] (5,586 days)
 | semimajor       = {{cvt|0.1381428|AU|km|lk=in}}
 | eccentricity    = 0.1982520
 | period          = –606.93 d
 | mean_anomaly    = 169.67605[[Degree (angle)|°]]
 | mean_motion     = {{Deg2DMS|0.59315203|sup=ms}} / day
 | inclination     = 146.76001° (to [[ecliptic]])
 | asc_node        = 37.24213°
 | arg_peri        = 356.27211°
 | physical_ref    = <ref name="jpl-phys"/>
 | mean_diameter   = 4 km
 | mass            = 
 | density         = <!-- assumed density of 2.6 g/cm3 from JPL -->
 | surface_grav    = 
 | escape_velocity = 
 | rotation        = 
 | albedo          = 0.04 (assumed)
 | spectral_type   = B–V = 0.73 ± 0.05, V–R = 0.49 ± 0.04<ref name="GraykowskiJewitt2018"/>
 | magnitude       = 22.1<ref name="SheppardMoons"/>
 | abs_magnitude   = 15.5<ref name="MPC127087"/>
}}

'''Hermippe''' {{IPAc-en|h|ɜːr|ˈ|m|ɪ|p|iː}}, also known as '''{{nowrap|Jupiter XXX}}''', is a [[natural satellite]] of [[Jupiter]]. It was discovered concurrently with [[Eurydome (moon)|Eurydome]] by a team of astronomers from the [[Institute for Astronomy (Hawaii)|Institute for Astronomy]] of the [[University of Hawaiʻi]] led by [[David C. Jewitt|David Jewitt]] and [[Scott S. Sheppard]] and [[Jan Kleyna]] in 2001, and given the temporary designation '''{{nowrap|S/2001 J 3}}'''.<ref>[http://www.cbat.eps.harvard.edu/iauc/07900/07900.html IAUC 7900: ''Satellites of Jupiter''] May 16, 2002 (discovery)</ref><ref name="MPEC-2002-J54">[https://minorplanetcenter.net/mpec/K02/K02J54.html MPEC 2002-J54: ''Eleven New Satellites of Jupiter''] May 15, 2002 (discovery and ephemeris)</ref>

Hermippe is about 4 kilometres in diameter, and orbits Jupiter at an average distance of 21.5 million kilometers in about 630 days, at an [[inclination]] of 151° to the [[ecliptic]] (149° to Jupiter's equator), in a [[retrograde motion|retrograde]] direction and with an [[eccentricity (orbit)|eccentricity]] of 0.2290.

It was named in August 2003 by the [[International Astronomical Union]], after [[Hermippe]], a lover of [[Zeus]] (Jupiter).<ref>[http://cbat.eps.harvard.edu/iauc/08100/08177.html IAUC 8177: ''Satellites of Jupiter, Saturn, Uranus''] {{webarchive|url=https://web.archive.org/web/20080709055841/http://cfa-www.harvard.edu/iauc/08100/08177.html |date=2008-07-09}} 2003 August (naming the moon)</ref>

Hermippe belongs to the [[Ananke group]], retrograde irregular moons which orbit Jupiter between {{convert|19,300,000|km|au|abbr=off|lk=on}} and {{convert|22,700,000|km|AU|abbr=on|lk=on}}, at inclinations of roughly 150°.

[[File:Hermippe-Eurydome-discovery.gif|thumb|left|Discovery image of Hermippe and [[Eurydome (moon)|Eurydome]] together taken in December 2001]]
{{clear|left}}

==References==
<references>
<ref name="jpl-phys">{{cite web
 |title      = Planetary Satellite Physical Parameters
 |url        = https://ssd.jpl.nasa.gov/?sat_phys_par#jupiter
 |publisher  = [[Jet Propulsion Laboratory]]
 |date       = 19 February 2015
 |access-date = 26 November 2020}}</ref>

<ref name="MPC127087">{{cite web
 |title      = M.P.C. 127087
 |url        = https://minorplanetcenter.net/iau/ECS/MPCArchive/2020/MPC_20201117.pdf
 |work       = Minor Planet Circular
 |publisher  = Minor Planet Center
 |date       = 17 November 2020}}</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="GraykowskiJewitt2018">{{Cite journal 
 |last=Graykowski |first=Ariel
 |last2=Jewitt |first2=David
 |date=2018-04-05
 |title=Colors and Shapes of the Irregular Planetary Satellites
 |url=https://iopscience.iop.org/article/10.3847/1538-3881/aab49b
 |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}}</ref>
</references>

== External links ==
*[http://www.dtm.ciw.edu/users/sheppard/satellites/jupsatdata.html Jupiter's Known Satellites] (by [[Scott S. Sheppard]])
*[http://www.dtm.ciw.edu/users/sheppard/satellites/jupmovie.html New Jupiter Satellite Movie Images] (image)
*[http://www.jpl.nasa.gov/releases/2002/release_2002_118.html Astronomers Discover 11 More Small Moons of Jupiter (JPL, 2002)] {{Webarchive|url=https://web.archive.org/web/20170102185216/http://www.jpl.nasa.gov/releases/2002/release_2002_118.html |date=2 January 2017}}
{{Moons of Jupiter}}

{{DEFAULTSORT:Hermippe (Moon)}}
[[Category:Ananke group]]
[[Category:Irregular satellites]]
[[Category:Moons of Jupiter]]
[[Category:Discoveries by Scott S. Sheppard]]
[[Category:Discoveries by David C. Jewitt]]
[[Category:Discoveries by Jan Kleyna]]
[[Category:Astronomical objects discovered in 2001|20011209]]
[[Category:Moons with a retrograde orbit]]