ʻOumuamua: Perbedaan antara revisi
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| name = 1I/ʻOumuamua
| background = #FFE0C2
| image = A2017U1 5gsmoothWHT enhanced.jpg
| image_size = 300
| caption = {{okina}}Oumuamua pada 28 Oktober 2017 {{efn | 1 = paparan 5 menit yang diambil oleh [[William Herschel Telescope]] pada 28 Oktober; {{okina}} Oumuamua muncul sebagai sumber cahaya di tengah gambar, sedangkan bintang latar tampak bergaris karena kecepatan {{okina}} Oumuamua saat teleskop melacaknya.<ref name="apod-1">{{Cite web |last1=Bonnell |first1=Jerry |last2=Nemiroff |first2=Robert |author-link2=Robert J. Nemiroff |title=A/2017 U1: An Interstellar Visitor |url=https://apod.nasa.gov/apod/ap171103.html |website=[[Astronomy Picture of the Day]] |access-date=13 March 2019 |archive-url=https://web.archive.org/web/20190313070147/https://apod.nasa.gov/apod/ap171103.html |archive-date=13 March 2019 |date=3 November 2017 |quote=A point of light centered in this 5 minute exposure recorded with the William Herschel Telescope in the Canary Islands on October 28 [...] Faint background stars appear streaked because the massive 4.2 meter diameter telescope is tracking the rapidly moving A/2017 U1 in the field of view. |url-status=live}}</ref>}}
| discovery_ref =
| discoverer = Robert Weryk dengan menggunakan [[Pan-STARRS]] 1
| discovery_site = [[Haleakala Observatory|Haleakala Obs.]], Hawaii
| discovered = 19 Oktober 2017
| mpc_name = 1I/2017 U1 (ʻOumuamua)<ref name="MPEC2017-V17"/>
| alt_names = 1I/ʻOumuamua<br>{{nowrap|1I/2017 U1{{·}}A/2017
| named_after = {{small|(nama [[Bahasa Hawaii|Hawaii]])}}<ref name="MPEC2017-V17" />
| mp_category = [[Objek antarbintang]],<ref name="MPEC2017-V17" /> asteroid hiperbola (JPL)<ref name="jpldata" />
| orbit_ref =
| epoch = 2017-Oct-31 ([[Julian day|JD]] 2458057.5)
| observation_arc = 34 hari
Baris 30:
| jupiter_moid = 1,455 AU
| avg_speed = {{val|26.33|0.01|ul=km/s}} (antarbintang)<ref name="pseudoMPEC" />
| dimensions =
| rotation = {{val|8.14|0.02}} [[Hour|h]]<ref name="Bolin2017" /><br />{{val|8.10|0.42}} h<ref name="Bannister2017" />
| albedo = 0,1 {{small|(spectral est.)}}<ref name="Jewitt2017" /><br />0,06–0,08 {{small|(spectral est.)}}<ref name="Bannister2017" />
Baris 38:
}}
'''1I/‘Oumuamua''' (secara resmi dinamai dengan
Berdasarkan 34 hari [[observasi arc]], [[eksentrisitas orbit]]
== Nomenklatur ==
Sebagai objek pertama yang dikenal dari objek yang sama, ‘Oumuamua memberikan kasus unik bagi
1I/‘Oumuamua; dan 1I/2017 U1 (‘Oumuamua)."
Nama ini berasal {{Etimologi|Hawaii|ʻou.mua.mua|pramuka}}, ({{Etimologi|2=ʻou|5=mua}}) dan mencerminkan jalannya objek ini layaknya pramuka atau utusan yang dikirim dari masa lalu untuk menjangkau kita.<ref name="Outerplaces">{{Cite web|url=https://www.outerplaces.com/science/item/17035-interstellar-object-asteroid-oumuamua|title=Our Solar System's First Interstellar Asteroid is Named 'Oumuamua'|last=Kesh|first=Johnathan|date=2017-11-08|website=Outer Places|access-date=2017-11-23|archive-date=2017-12-01|archive-url=https://web.archive.org/web/20171201032243/https://www.outerplaces.com/science/item/17035-interstellar-object-asteroid-oumuamua|dead-url=yes}}</ref>
== Pengamatan ==
Pengamatan dan pengambilan kesimpulan akan lintasan ‘Oumuamua, terutama diperoleh dari data Teleskop Pan-STARRS1 dan [[Canada-France-Hawaii Telescope]] (CFHT), komposisi dan bentuknya, dari teleskop [[Very Large Telescope|Very Large]]
=== Lintasan ===
‘Oumuamua adalah contoh pertama dari objek antarbintang yang terlihat datang dari arah bintang [[Vega]] di rasi bintang [[Lyra]],<ref>{{Cite news|url=http://www.nzherald.co.nz/technology/news/article.cfm?c_id=5&objectid=11937034|title='Alien' object excites astronomers. Is it a 'visitor' from nearby star?|last=Seidel|first=Jamie|date=26 October 2017|publisher=[[The New Zealand Herald]]}}</ref> dengan kecepatan hiperbolanya adalah
{| align="right" class="wikitable" style="text-align: center; margin: 1em 1em 10px; font-size: 0.9em;"
|+Kecepatan ‘Oumuamua menurut kecepatan Matahari
Baris 105:
|}
{| class="wikitable" style="text-align: center; margin-right: 0.8em; font-size: 0.9em; margin-bottom: 10px;"
|+Kecepatan masuk pada 200
! Objek
! Tahun
Baris 141:
| 1855
| 4,88
| 22 dalam 15 hari<ref group="n">Other orbital solutions show [https://groups.yahoo.com/neo/groups/mpml/conversations/messages/33402 C/2008 J4 entering the Solar System @ 3.5 ± 1.3 km/s.]{{Pranala mati|date=Januari 2022 |bot=InternetArchiveBot |fix-attempted=yes }} JPL #10 shows that on 1855-Mar-24 C/2008 J4 was moving 4.88 ± 1.8 km/s.</ref>
|-
| '''1I/‘Oumuamua '''
Baris 151:
=== Sifat ke-asteriod-an ===
[[Berkas:A2017U1 5gsmoothWHT enhanced.jpg|jmpl|‘Oumuamua, dicitrakan dengan [[Teleskop William Herschel]] pada 28 Juli 2017, dipandang sebagai sumber cahaya tetap di tengah gambar. Latar belakang bintang-bintang muncul melesat karena teleskop melacak asteroid yang bergerak cepat.]]
Pada awalnya, ‘Oumuamua diumumkan sebagai komet C/2017 U1 (PANSTARRS) pada 25 Oktober 2017 dengan berdasarkan pada orbit hiperbolik yang dimilikinya. Dalam upaya untuk memberikan konfirmasi setiap aktivitas komet, gambar tumpuk sangat dalam
=== Penampilan dan bentuk ===
Spektrum yang direkam oleh
Menganggap itu adalah sebuah batuan dengan [[albedo]] dari 10%, benda ini memiliki diameter sekitar {{Cvt|160|m}}.
== Hipotesis misi ruang angkasa ==
[[Berkas:Oumuamua magnitude 2015-2019.png|jmpl|‘Oumuamua akan memudar pada
‘Oumuamua memiliki kecepatan yang terlalu cepat untuk dijangkau oleh pesawat luar angkasa saat ini.<ref>{{Cite news|url=http://astronomynow.com/2017/11/22/an-interstellar-interloper-is-dashing-through-our-solar-system|title=An interstellar interloper is dashing through our solar system – Astronomy Now|last=Clarke|first=Stephen|date=November 22, 2017|language=en-US|access-date=2017-11-24}}</ref>
==Lihat pula==
* [[CNEOS-2014-01-08]]
== Catatan ==
{{reflist|group="n"}}
== Referensi ==
{{reflist|
| refs =
<ref name="Discovery">{{cite web
|title=MPEC 2017-U181: COMET C/2017 U1 (PANSTARRS)
|url=http://www.minorplanetcenter.net/mpec/K17/K17UI1.html
|website=Minor Planet Center|publisher=[[International Astronomical Union]]
|date=25 October 2017
|access-date=25 October 2017}} (CK17U010)</ref>
<ref name="pseudoMPEC">{{cite web
|title=Pseudo-MPEC for A/2017 U1 (Fact File)
|url=https://projectpluto.com/temp/2017u1.htm
|publisher=Bill Gray of Project Pluto
|date=26 October 2017
|access-date=26 October 2017}} [https://projectpluto.com/temp/2017u1_a.htm#elements (Orbital elements)]</ref>
<ref name="jpldata">{{cite web
|type = JPL s14 with last obs: 17 November 2017
|title = JPL Small-Body Database Browser: ʻOumuamua (A/2017 U1)
|url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2017U1;cad=1
|archive-url=https://web.archive.org/web/20171025125356/https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2017U1;cad=1
|archive-date=25 October 2017
|dead-url=no
|publisher = [[Jet Propulsion Laboratory]]
|access-date = 23 November 2017}}</ref>
<ref name="A2017U1">{{cite web
|title=MPEC 2017-U183: A/2017 U1
|url=http://www.minorplanetcenter.net/mpec/K17/K17UI3.html
|website=Minor Planet Center
|publisher=International Astronomical Union
|date=25 October 2017
|access-date=25 October 2017}} (AK17U010)</ref>
<ref name="NASA171026">{{cite web
|title=Small Asteroid or Comet 'Visits' from Beyond the Solar System
|url=https://www.nasa.gov/feature/jpl/small-asteroid-or-comet-visits-from-beyond-the-solar-system
|publisher=[[NASA]]
|date=26 October 2017
|access-date=29 October 2017}}</ref>
<ref name="MPEC2017-V17">{{cite web
|title=MPEC 2017-V17 : NEW DESIGNATION SCHEME FOR INTERSTELLAR OBJECTS
|url=http://www.minorplanetcenter.net/mpec/K17/K17V17.html
|website=Minor Planet Center
|publisher=International Astronomical Union
|date=6 November 2017
|access-date=6 November 2017}}</ref>
<!-- <ref name="Knight2017">{{cite journal
|last=Knight |first=Matthew
|first2=Silvia |last2=Protopapa
|first3=Michael S.P. |last3=Kelley
|first4=Tony L. |last4=Farnham
|first5=James M. |last5=Bauer
|first6=Dennis |last6=Bodewits
|first7=Lori M. |last7=Feaga
|first8=Jessica M. |last8=Sunshine
|title=The rotation period and shape of the hyperbolic asteroid A/2017 U1 from its lightcurve
|journal=Submitted to [[Astrophysical Journal Letters]]
|pages=5 |year=2017
|arxiv=1711.01402}}</ref> -->
<ref name="Bolin2017">{{cite journal
|last=Bolin |first=Bryce T.
|first2=Harold A. |last2=Weaver
|first3=Yanga R. |last3=Fernandez
|first4=Carey M. |last4=Lisse
|first5=Daniela |last5=Huppenkothen
|first6=R. Lynne |last6=Jones
|first7=Mario |last7=Juric
|first8=Joachim |last8=Moeyens
|first9=Charles A. |last9=Schambeau
|first10=Colin T. |last10=Slater
|first11=Zeljko |last11=Ivezic
|first12=Andrew J. |last12=Connolly
|title=APO Time Resolved Color Photometry of Highly-Elongated Interstellar Object 1I/ʻOumuamua
|journal=Submitted to [[Astrophysical Journal Letters]]
|pages=11 |year=2017
|arxiv=1711.04927}}</ref>
<ref name="Jewitt2017">{{cite journal
|last=Jewitt |first=David
|first2=Jane |last2=Luu
|first3=Jayadev |last3=Rajagopal
|first4=Ralf |last4=Kotulla
|first5=Susan |last5=Ridgway
|first6=Wilson |last6=Liu
|first7=Thomas |last7=Augusteijn
|title=Interstellar Interloper 1I/2017 U1: Observations from the NOT and WIYN Telescopes
|journal=Submitted to [[Astrophysical Journal Letters]]
|pages=11 |year=2017
|url=http://www2.ess.ucla.edu/~jewitt/papers/2017/JLR17.pdf
|arxiv=1711.05687}}</ref>
<ref name="NOAO2017">{{cite web
|title = A Familiar-Looking Messenger from Another Solar System
|publisher = National Optical Astronomy Observatory
|url = https://www.noao.edu/news/2017/pr1706.php
|access-date = 15 November 2017
|archive-date = 2017-11-16
|archive-url = https://web.archive.org/web/20171116133909/https://www.noao.edu/news/2017/pr1706.php
|dead-url = yes
}}</ref>
<ref name="Bannister2017">{{cite journal
|last1=Bannister |first1=Michele T.
|last2=Schwamb |first2=Megan E.
|title=Col-OSSOS: Colors of the Interstellar Planetesimal 1I/2017 U1 in Context with the Solar System
|journal=Submitted to ApJL
|pages=9 |year=2017
|arxiv=1711.06214}}</ref>
<!-- <ref name="h">{{cite web
|title = Asteroid Size Estimator
|publisher = CNEOS – NASA/JPL
|url = https://cneos.jpl.nasa.gov/tools/ast_size_est.html
|access-date = 9 November 2017}}</ref> -->
<ref name="HubbleProposal">{{cite web
|title = Which way home? Finding the origin of our Solar System's first interstellar visitor
|publisher = NASA
|url = http://www.stsci.edu/hst/phase2-public/15405.pdf
|access-date = 15 November 2017}}</ref>
}}
{{DEFAULTSORT:Oumuamua}}
[[Kategori:Medium antarbintang]]
[[Kategori:Objek astronomi yang ditemukan tahun 2017]]
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