225088 Gonggong: Verskil tussen weergawes
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'''{{mp|(225088) 2007 OR|10}}''' is ’n groot voorwerp in die [[verstrooide skyf]]. Dit is die derde grootste bekende voorwerp in die [[Sonnestelsel]] wat verder van die [[Son]] is as [[Neptunus (planeet)|Neptunus]]<ref name="scida2015" /><ref name="Pál2016">{{cite journal|last1=Pál|first1=A.|last2=Kiss|first2=C.|last3=Müller|first3=T. G.|last4=Molnár|first4=L.|last5=Szabó|first5=R.|last6=Szabó|first6=G. M.|last7=Sárneczky|first7=K.|last8=Kiss|first8=L. L.|title=Large size and slow rotation of the trans-Neptunian object (225088) 2007 OR10 discovered from Herschel and K2 observations|journal=The Astronomical Journal|volume=151|issue=5|date=2016-04-19|page=117|doi=10.3847/0004-6256/151/5/117}}</ref><ref name="JPL2016-05-11">{{cite web |
== Geskiedenis ==
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=== Naam ===
Brown het die voorwerp "Snow White" genoem met die veronderstelling dat dit wit was<ref name="scida2011" /> omdat dit baie groot of baie helder moes gewees het om deur hulle waargeneem te kon word.<ref name="Brownblog">{{cite web |date=10 Maart 2009 |title=Snow White needs a bailout |publisher=Mike Brown's Planets (blog) |author=Michael E. Brown |author-link=Michael E. Brown |url=http://www.mikebrownsplanets.com/2009/03/snow-white-needs-bailout.html |access-date=17 Februarie 2010 |language=en |archive-url=https://web.archive.org/web/20200108231832/http://www.mikebrownsplanets.com/2009/03/snow-white-needs-bailout.html |archive-date=8 Januarie 2020 |url-status=live|df=dmy-all}}</ref> Dit was ook die "sewende dwerg" wat Brown se span ontdek het – ná Quaoar in 2002, Sedna in 2003, Haumea en Orcus in 2004, en Makemake en Eris in 2005. {{mp|2007 OR|10}} het egter geblyk een van die rooiste voorwerpe in die [[Kuiper-gordel]] te wees, en daarom is dié naam laat vaar.
{{mp|2007 OR|10}} is tans die grootste bekende voorwerp in die Sonnestelsel sonder ’n amptelike naam. In 2011 het Brown besluit hy het eindelik genoeg inligting om dit een te gee, want die ontdekking van [[Ys|waterys]] en die moontlikheid van [[metaan]] het dit beduidenswaardig genoeg gemaak om verdere waarnemings te regverdig.<ref name="scida2011" /> Brown het egter in 2015 nog nie ’n naam voorgestel nie, maar hy het opgemerk dat enigiemand in 2017 ’n voorstel kan maak.<ref>{{cite web |url=http://www.mikebrownsplanets.com/2015/01/ten-years-of-eris.html?showComment=1423266081122#c5069655186376307635 |title=Mike Brown's Planets |work=mikebrownsplanets.com |language=en |archive-url=https://web.archive.org/web/20200108234118/http://www.mikebrownsplanets.com/2015/01/ten-years-of-eris.html?showComment=1423266081122 |archive-date=8 Januarie 2020 |url-status=live|df=dmy-all}}</ref>
== Afstand ==
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== Absolute magnitude ==
Die grootte van ’n voorwerp kan bereken word uit sy [[absolute magnitude]] (H) en [[albedo]] (die hoeveelheid lig wat dit weerkaats). {{mp|2007 OR|10}} het ’n absolute magnitude van 1,92,<ref name="jpldata" /> wat dit die vyfde helderste bekende [[Trans-Neptunus-voorwerp]] maak,<ref name=BrownRedemption2>{{cite web |title=The Redemption of Snow White (Part 2 of 3) |last=Brown |first=Mike Brown
en helderder as Orcus (H=2,3; D≈800 km).<ref name="Orcusjpl">{{cite web |type=2008-12-04 last obs |title=JPL Small-Body Database Browser: 90482 Orcus (2004 DW) |url=http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=Orcus |access-date=5 Februarie 2009 |language=en |archive-url=https://web.archive.org/web/20200424200101/https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=Orcus |archive-date=24 April 2020 |url-status=live|df=dmy-all}}</ref>
Dit is een van die rooiste voorwerpe bekend.<ref name="Brown2011">{{Cite journal|date=2011
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{{mp|2007 OR|10}} is al 46 keer waargeneem terwyl dit sewe keer in [[opposisie (astronomie)|opposisie]] was en is ontdek op ’n fotoplaat van 1985.<ref name="jpldata" /> Dit is op 7 Januarie 2009 amptelik aangekondig.<ref name="MPEC2009-A42">{{cite web |date=7 Januarie 2009 |title=MPEC 2009-A42 : 2007 OR10 |publisher=Minor Planet Center |url=http://minorplanetcenter.org/mpec/K09/K09A42.html |
== Status as dwergplaneet ==
Volgens die jongste ramings in Mei 2016<ref name="scida2015" /> sou {{mp|2007 OR|10}} die derde grootste dwergplaneet wees: kleiner as Pluto en Eris, maar groter as Makemake (vermoedelik), Haumea en Ceres. Die [[Internasionale Astronomiese Unie]] (IAU) het nog nie sedert sy ontdekking die erkenning van nog dwergplanete oorweeg nie. Volgens Brown "moet dit ’n dwergplaneet wees al is dit oorwegend rotsagtig",<ref name="Brown-dplist">{{cite web |title=How many dwarf planets are there in the outer solar system? |publisher=California Institute of Technology |last=Brown |first=Michael E. |authorlink=Michael E. Brown |url=http://www.gps.caltech.edu/~mbrown/dps.html |access-date=23 September 2011 |language=en |archive-url=https://web.archive.org/web/20140924041007/http://www.gps.caltech.edu/~mbrown/dps.html |archive-date=24 September 2014 |url-status=live|df=dmy-all}}</ref>
en Scott Sheppard en sy kollegas dink dit is "waarskynlik" ’n dwergplaneet<ref name=Sheppard2011>{{cite journal
|last1=Sheppard |first1=Scott S. |authorlink=Scott S. Sheppard |last2=Udalski |first2=Andrezej |last3=Trujillo |first3=Chadwick |last4=Kubiak |first4=Marcin |last5=Pietrzynski |first5=Grzegorz |last6=Poleski |first6=Radoslaw |last7=Soszynski |first7=Igor |last8=Szymański |first8=Michal K. |last9=Ulaczyk |first9=Krzysztof |displayauthors=3
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| refs =
<ref name=MPC>{{cite web |title=List Of Centaurs and Scattered-Disk Objects |publisher=Minor Planet Center |url=http://www.minorplanetcenter.org/iau/lists/Centaurs.html |access-date=20 Januarie 2009 |language=en |archive-url=https://web.archive.org/web/20170629210646/http://www.minorplanetcenter.org/iau/lists/Centaurs.html |archive-date=29 Junie 2017 |url-status=live|df=dmy-all}}</ref>
<ref name="Buie">{{cite web |author=Marc Buie |author-link=Marc W. Buie |date=24 Oktober 2011 |title=Orbit Fit and Astrometric record for 225088 |publisher=SwRI (Space Science Department) |url=http://www.boulder.swri.edu/~buie/kbo/astrom/225088.html |access-date=14 November 2014 |language=en |archive-url=https://web.archive.org/web/20190612151534/https://www.boulder.swri.edu/~buie/kbo/astrom/225088.html |archive-date=12 Junie 2019 |url-status=live|df=dmy-all}}</ref>
<ref name="jpldata">{{cite web |type=2011-10-24 |quote=last obs; arc: 26.18 years |title=JPL Small-Body Database Browser: 225088 (2007 OR10) |url=http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2007OR10 |access-date=7 April 2016 |language=en |archive-url=https://web.archive.org/web/20200424200157/https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2007OR10 |archive-date=24 April 2020 |url-status=live|df=dmy-all}}</ref>
<ref name=TNOsCool4>{{cite arXiv |first1=P. |last1=Santos-Sanz |first2=E. |last2=Lellouch |first3=S. |last3=Fornasier |first4=C. |last4=Kiss |first5=A. |last5=Pal |first6=T.G. |last6=Müller |first7=E. |last7=Vilenius |first8=J. |last8=Stansberry |first9=M. |last9=Mommert |first10=A. |last10=Delsanti |first11=M. |last11=Mueller |first12=N. |last12=Peixinho |first13=F. |last13=Henry |first14=J.L. |last14=Ortiz |first15=A. |last15=Thirouin |first16=S. |last16=Protopapa |first17=R. |last17=Duffard |first18=N. |last18=Szalai |first19=T. |last19=Lim |first20=C. |last20=Ejeta |first21=P. |last21=Hartogh |first22=A.W. |last22=Harris |first23=M. |last23=Rengel
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<ref name="PHL">{{cite web |url=http://phl.upr.edu/projects/habitable-exoplanets-catalog/calculators |title=HEC: Exoplanets Calculator |publisher=University of Puerto Rico at Arecibo |work=Planetary Habitability Laboratory |access-date=17 Oktober 2014 |language=en |archive-url=https://web.archive.org/web/20190905010034/http://phl.upr.edu:80/projects/habitable-exoplanets-catalog/calculators |archive-date=5 September 2019 |url-status=live|df=dmy-all}}</ref>
<ref name="AstDys">{{cite web |title=AstDys 2007OR10 Ephemerides |publisher=Department of Mathematics, University of Pisa, Italy |url=http://hamilton.dm.unipi.it/astdys/index.php?pc=1.1.3.0&n=2007OR10 |access-date=16 Maart 2009 |language=pt |archive-url=https://web.archive.org/web/20121024041109/http://www.webcitation.org/query?id=1242528089074574 |archive-date=24 Oktober 2012 |url-status=live|df=dmy-all}}</ref>
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