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Baris 90:
| url = http://www.space.com/12372-pluto-fourth-moon-nasa-spacecraft.html
| accessdate = 2011-07-21}}</ref><ref name = "cosmic">{{Cite web
| last = Boyle
| first = A. | authorlink = Alan Boyle | title = Scientists spot Pluto's fourth moon
| work = [http://cosmiclog.msnbc.msn.com/ Cosmic Log on msnbc.com]
Baris 96 ⟶ 98:
| date = 2011-07-20
| url = http://cosmiclog.msnbc.msn.com/_news/2011/07/20/7119984-scientists-spot-plutos-fourth-moon
| format =
| doi = | accessdate = 2011-07-20
| accessdate = 2011-07-20}}</ref> Pengamatan lebih lanjut dilakukan pada 3 Juli dan 18 Juli 2011, dan keberadaannya sebagai satelit dipastikan pada 20 Juli 2011.<ref name = "telegram">{{Cite web▼
| archive-date = 2012-07-15
| archive-url = https://web.archive.org/web/20120715081849/http://cosmiclog.msnbc.msn.com/_news/2011/07/20/7119984-scientists-spot-plutos-fourth-moon
| dead-url = yes
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| last = Showalter | first = M. R. | coauthors = Hamilton, D. P.
| title = New Satellite of (134340) Pluto: S/2011 (134340) 1
Baris 105 ⟶ 112:
| accessdate = 2011-07-20}}</ref><ref name=autogenerated1>[http://www.space.com/12356-pluto-fourth-moon-discovery-hubble-photo.html Pluto Has Another Moon, Hubble Photos Reveal | Dwarf Planet Pluto | Pluto's Moons | Space.com<!-- Bot generated title -->]</ref><!-- http://www.reuters.com/article/2011/07/20/us-space-pluto-idUSTRE76J4L020110720 -->
Tingkat kecerahan P4 hanya sekitar 10% dari [[Nix (bulan)|Nix]]. Dengan diameter antara 13–34 km, satelit ini merupakan satelit terkecil Pluto.<ref name="nasa1">{{cite web|title=NASA's Hubble Discovers Another Moon Around Pluto|url=http://www.nasa.gov/mission_pages/hubble/science/pluto-moon.html|accessdate=2011-07-20}}</ref><ref name="cnn1">{{cite web|title=Tiny fourth moon discovered in Pluto's orbit|url=http://www.cnn.com/2011/US/07/20/us.pluto.moon/|publisher=[[CNN]]|accessdate=2011-07-20}}</ref> Orbitnya mungkin berbentuk lingkaran dengan jari-jari sekitar 59.000 km.<ref name = "telegram"/><ref name = "Lakdawalla">{{Cite web
| last = Lakdawalla | first = E. | authorlink = | title = A fourth moon for Pluto
| work = [http://planetary.org/blog Planetary Society weblog]
| publisher = [[The Planetary Society]]
| date = 2011-07-20 | url = http://www.planetary.org/blog/article/00003107/
| format =
| format = | doi = | accessdate = 2011-07-20}}</ref> P4 berada di antara Nix dan [[Hydra (bulan)|Hydra]], dan beredar mengelilingi Pluto sekali setiap 32,1 hari Bumi.<ref name = "telegram"/><ref name = "Lakdawalla" />▼
| doi =
| accessdate = 2011-07-20
| archive-date = 2012-04-01
| archive-url = https://web.archive.org/web/20120401234943/http://www.planetary.org/blog/article/00003107/
| dead-url = yes
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Seperti satelit Pluto yang lainnya,<ref name = "Stern">{{Cite journal | last = Stern | first = S. A. | authorlink = Alan Stern | coauthors = Weaver, H. A.; Steff, A. J.; Mutchler, M. J.; Merline, W. J.; Buie, M. W.; Young, E. F.;
Young, L. A.; Spencer, J. R. | title = A giant impact origin for Pluto’s small moons and satellite multiplicity in the Kuiper belt | journal = [[Nature (journal)|Nature]] | volume = 439 | issue = | pages = 946-948 | publisher = | location = | date = 2006-02-23 | language = | url = http://ns1.plutoportal.net/~layoung/eprint/Stern2006plutosat.pdf | doi = 10.1038/nature04548 | id = | accessdate = 2011-07-20 | archive-date = 2012-01-19 | archive-url = https://web.archive.org/web/20120119001455/http://ns1.plutoportal.net/~layoung/eprint/Stern2006plutosat.pdf | dead-url = yes }}</ref> P4 diduga merupakan hasil tubrukkan antara Pluto dengan [[objek sabuk Kuiper]] lainnya.<ref name = "cosmic"/>
[[Berkas:Moons of Pluto.png|300px|kiri|jmpl]]
Baris 127 ⟶ 136:
{{reflist}}
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[[Kategori:Satelit alami]]
[[Kategori:Satelit Pluto]]
[[Kategori:Objek astronomi yang ditemukan tahun 2011]]
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