Gridr (satelit): Perbedaan antara revisi

| name = S/2004 S 20Gridr

| alt_names = Saturnus LIV<br />S/2004 S 20<br />S2423b<ref name="SheppardMoons"/>

| discovery_ref = <ref name="Discoverers_JPL">{{Cite web|url=https://ssd.jpl.nasa.gov/?sat_discovery|title=Planetary Satellite Discovery Circumstances|last=|first=|date=|website=[[Jet Propulsion Laboratory|JPL]]|access-date=31 Juli 2020|archive-date=2017-01-12|archive-url=https://web.archive.org/web/20170112123054/http://ssd.jpl.nasa.gov/?sat_discovery|dead-url=no}}</ref>

| orbit_ref = <ref name="SheppardMoons">{{Cite web|url=https://sites.google.com/carnegiescience.edu/sheppard/moons/saturnmoons|title=Scott S. Sheppard, Moons of Saturn |website=CargenieScienceCargenie Science|date=2019|access-date=31 Juli 2020|archive-date=2019-04-24|archive-url=https://web.archive.org/web/20190424041908/https://sites.google.com/carnegiescience.edu/sheppard/moons/saturnmoons|dead-url=no}}</ref>

'''Gridr''' ('''Saturnus LIV'''), penamaan sementara '''S/2004 S 20''', adalah [[satelit alami]] [[planet]] [[Saturnus]]. Penemuannya diumumkan oleh [[Scott S. Sheppard]], [[David C. Jewitt]], dan [[Jan Kleyna]] pada tanggal 7 Oktober 2019 dari pengamatan yang dilakukan antara tanggal 12 Desember 2004 dan 22 Maret 2007.<ref name="Announcement">{{Cite web|url=https://minorplanetcenter.net/mpec/K19/K19TC6.html|title=MPEC 2019-T126 : S/2004 S 20|website=minorplanetcenter.net|access-date=31 Juli 2020|archive-date=2021-01-23|archive-url=https://web.archive.org/web/20210123081126/https://minorplanetcenter.net/mpec/K19/K19TC6.html|dead-url=no}}</ref> Satelit ini diberikan penamaan permanen pada Juni 2021.<ref name="MPC132212">{{cite web|title=M.P.C. 132212|url=https://minorplanetcenter.net/iau/ECS/MPCArchive/2021/MPC_20210601.pdf|website=Minor Planet Center|publisher=[[International Astronomical Union]]|date=1 Juni 2021|access-date=16 Juni 2021|archive-date=2021-06-16|archive-url=https://web.archive.org/web/20210616050522/https://www.minorplanetcenter.net/iau/ECS/MPCArchive/2021/MPC_20210601.pdf|dead-url=no}}</ref> Pada tanggal 24 Agustus 2022, satelit ini resmi dinamakan menurut nama seorang [[jotun]] dalam [[mitologi Nordik]], [[Gríðr]].<ref>{{cite web |url=https://astrogeology.usgs.gov/news/nomenclature/names-approved-for-10-small-satellites-of-saturn |title=Names Approved for 10 Small Satellites of Saturn |author=<!--Not stated--> |date=24 Agustus 2022 |website=usgs.gov |publisher=USGS |access-date=30 Agustus 2022 |archive-date=2022-08-25 |archive-url=https://web.archive.org/web/20220825125009/https://astrogeology.usgs.gov/news/nomenclature/names-approved-for-10-small-satellites-of-saturn |dead-url=no }}</ref>

S/2004 S 20Gridr memiliki diameter sekitar 4 kilometer dan mengorbit Saturnus dari jarak rata-rata 19.418 [[Gigameter|Gm]] selama 1.010,55 hari, pada [[inklinasi]] 163° keterhadap [[ekliptika]], dalam gerakanarah ''retrograde'' dengan [[eksentrisitas orbit|eksentrisitas]] 0,197.<ref name="Announcement"/>