Orcus (planaid crivassanagh)
{{WD Kishtey Fys Red Rollageydagh
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Ta '''90482 Orcus''' ny '''Orcus''' ([[ASE]]: /ˈɔrkəs/ or'-kəs, [[Ladjyn]]: ''Orcus'', shenn ennym: '''2004 DW''') ny chorpane [[Cryss Kuiper|Chryss Kuiper]] (KBO) feddynit magh ec [[Michael E. Brown|Michael Brown]], [[Chad Trujillo]] as [[David L. Rabinowitz]]. Va jallooyn y feddyn magh goit er [[17 Toshiaght Arree]], [[2004]]. 

== Cruinlagh ==
[[Coadan:TheKuiperBelt Orbits Orcus2.svg|left|thumb|upright=1.5|Ta'n jalloo soilsheragh shoh taishbyney cruinlee Orcus (gorrym), Pluto (jiarg) as Neptune (lheeah). Ta Orcus as Pluto taishbynit ayns nyn ynnydyn ayns Averil 2006. Ta daten nyn muill s'odjey (Q) as nyn muill s'faggys (q) soilshit myrgeddin.]]
Ta Orcus ny [[pluteeno|phluteeno]] sampleyragh (red t'ayns [[aavuilley cruinlagh]] 2:3 lesh [[Neptune]]). Ta'n cruinlagh 247 bleeantyn echey jeh cummey cruinlagh [[Pluto]] (ta'n perihelion oc çheu heose jeh'n ecliptagh) agh lesh ard anchaslagh. Ga dy dy vel y cruinlagh echey goaill toshiaght dy heet faggys da cruinlagh Neptune, ta foddeeaght mooar eddyr oc rere yn aavuilley (ta ny smoo na 60 keimyn [[scarrey uillinagh]] eddyr oc).
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== Troyn fishigagh ==
=== Mooadys as reayrtys ===
She 2.3 [[jarroo-vooadys]] Orcus (ta cosoylagh rish jarroo-vooadys y KBO elley [[50000 Quaoar]]). Ayns ny kied meeghyn 2007 va pabyr soilshit magh va taishbyney dy vel Orcus cronnaghit ec [[fodreayrtan spoar Spitzer]] ayns [[fo-yiarg foddey]], car y chied tree bleeantyn gobbraghey, as v'eh feddynit magh nagh vel Orcus agh 946.3{{±|74.1|72.3}}&nbsp;km er crantessen<ref name="Stansberry 2007">{{cite journal|last=Stansberry|first=J.| coauthors=Grundy, W.; Brown, M.; et.al.|title=Physical Properties of Kuiper Belt and Centaur Objects: Constraints from Spitzer Space Telescope|url=http://arxiv.org/abs/astro-ph/0702538v1|year=2007}}</ref> T'eh jeeaghyn dy vel ard-albedo ~ 20 % ec Orcus.

=== Daaghyn as scaanyn ===
Rere baghtalyn ayns [[fo-yiarg]] lesh [[Thie Rollageydys Yiass ny h-Oarpey]] ta Orcus co-yeant ass [[ushtey rio]] as co-elmintyn carboanagh.<ref name="deBergh2005">{{cite journal | author=C. de Bergh, A. Delsanti, G. P. Tozzi, E. Dotto, A. Doressoundiram and M. A. Barucci | title=The Surface of the Transneptunian Object 9048 Orcus| journal=Astronomy & Astrophysics | volume=437 | year=2005 | pages=1115–1120 | url=http://adsabs.harvard.edu/abs/2005A&A...437.1115D |doi=10.1051/0004-6361:20042533}}</ref> Er goll ny s'diuney, va ny scaanyn fo-yiarg goit ec yn [[Fodreayrtan Gemini|'odreayrtan Gemini]] feeraghey dy vel 15—30% ushtey rio (ny nagh row ny smoo na 50%) er y thalloo. T'eh shen, ta ny sloo ushtey rio er Orcus na t'er [[Charon (fo-phlannad)|Charon]], agh dy vel y mooad keddin er myr t'er [[Triton (fo-phlannad)|Triton]]. Myrgeddin, va joaraghyn currit er y vooad [[rio meetane]] (ny sloo na 30%) er, as eh çheet er jargaght dy vel co-elmintyn elley er y phlanaid.<ref name="Trujillo2005">{{cite journal | author=[[Chad Trujillo|Chadwick A. Trujillo]], [[Michael E. Brown]], [[David L. Rabinowitz]], Thomas R. Geballe | title=Near Infrared Surface Properties of the Two Intrinsically Brightest Minor Planets (90377) Sedna and (90482) Orcus| journal=The Astrophysical Journal | volume=627 |  year=2005 | pages=1057–1065 | url=http://adsabs.harvard.edu/abs/2005ApJ...627.1057T | doi=10.1086/430337}} [http://arxiv.org/abs/astro-ph/0504280 Preprint on arXiv.]</ref>

Ta KBOyn taishbyney caghlaays daaghyn as scaanyn, agh ta Orcus taishbyney daah neuchommeeagh ta neuchosoylagh rish jiargid y chorpane cosoylagh rish [[28978 Ixion|Ixion]].
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== Fo-phlannad ==
Va feddyn magh fo-phlannad Orcus soilshit magh ayns IAUC 8812 er [[22 Toshiaght Arree]] [[2007]]<ref>http://www.johnstonsarchive.net/astro/astmoons/am-90482.html</ref> Cha nel y cruinlagh echey er fys ain foast, ansherbee.

Va'n fo-phlannad fakinit mygeayrt 0.25 arcsec veih Orcus lesh [[jarroo-vooadys|anchasley vooadys]] 2.7 echey.<ref name="EKO51"> [http://www.boulder.swri.edu/ekonews/issues/past/n051/html/index.html Distant EKO] The Kuiper Belt Electronic newsletter, Mart 2007</ref>

Credjal dy vel [[albedo]] yn 'o-phlannad unnane as albedo Orcus, ta'n mooadys coyrlaghey da vel eh feer mooar er crantessen my vel eh cosoylit rish y phlanaid hene (~220 km).

== Ennym ==
Rere stiurey cliaghtey enmys yn IAU, t'ad enmyn jeeghyn fo-halloo ta currit er corpaneyn lesh mooadys as cruinlagh cosoylagh rish [[Pluto]]. Lesh shen, hugg Brown, Trujillo as Rabinowitz yn ennym Orcus, jee ny marroo ayns feayn-skeealleydaght Romanagh, er oaie. Va'n ennym coontit as soilshit magh er [[22 Sauin]], [[2004]].
 
== Kianglaghyn magh ==
{{commonscategory}}
* [http://cfa-www.harvard.edu/mpec/K04/K04D09.html MPEC 2004-D09] fogrey magh y feddyn magh agh cur gys lieh [[Raymond J. Bambery]], [[Steven H. Pravdo]], [[Michael D. Hicks]], [[Kenneth J. Lawrence]], [[Daniel MacDonald]], [[Eleanor F. Helin]] as [[Robert Thicksten]] / [[NEAT]]
* [http://cfa-www.harvard.edu/mpec/K04/K04D13.html MPEC 2004-D13] feeraghey MPEC 2004-D09
* [https://web.archive.org/web/20070322195011/http://www.chadtrujillo.com/2004dw/ Duillag Chad Trujillo fo 2004 DW]
* [http://news.bbc.co.uk/2/hi/science/nature/3506329.stm Kied art y BBC]
* [http://www.newscientist.com/news/news.jsp?id=ns99994702 Kied art yn earishlioar New Scientist]
* [https://web.archive.org/web/20070522133751/http://www.lowell.edu/users/buie/kbo/astrom/90482.html Troyn cruinlagh veih'n Thie rollageydys Lowell]
* [http://hamilton.dm.unipi.it/cgi-bin/astdys/astibo?objects:Orcus;main Troyn cruinlagh AstDys]
* [http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=Orcus;orb=1;view=Far Lhiggeyder cruinlagh] ass JPL (Java) / [http://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=Orcus Ephemeris]

== Imraaghyn ==
{{reflist}}

{{corpaneyn tessen-neptioonagh}}
{{gurneil eaghtyrys}}
{{DEFAULTSORT:090482}}
[[Ronney:90482 Orcus| ]]
[[Ronney:Pluteenoyn]]
[[Ronney:Feddynyssyn liorish Michael E. Brown|Orcus]]
[[Ronney:Feddynyssyn liorish Chad Trujillo|Orcus]]
[[Ronney:Feddynyssyn liorish David L. Rabinowitz|Orcus]]
[[Ronney:Myn-phlanaidyn enmyssit|Orcus]]
[[Ronney:Planaidyn crivassanagh|Orcus]]
[[Ronney:Reddyn rollageydagh feddynit magh 'sy vlein 2004|20040217]]
Ta 90482 Orcus ny Orcus (ASE: /ˈɔrkəs/ or'-kəs, Ladjyn: Orcus, shenn ennym: 2004 DW) ny chorpane Chryss Kuiper (KBO) feddynit magh ec Michael Brown, Chad Trujillo as David L. Rabinowitz. Va jallooyn y feddyn magh goit er 17 Toshiaght Arree, 2004. 

 Cruinlagh 
left|thumb|upright=1.5|Ta'n jalloo soilsheragh shoh taishbyney cruinlee Orcus (gorrym), Pluto (jiarg) as Neptune (lheeah). Ta Orcus as Pluto taishbynit ayns nyn ynnydyn ayns Averil 2006. Ta daten nyn muill s'odjey (Q) as nyn muill s'faggys (q) soilshit myrgeddin.
Ta Orcus ny phluteeno sampleyragh (red t'ayns aavuilley cruinlagh 2:3 lesh Neptune). Ta'n cruinlagh 247 bleeantyn echey jeh cummey cruinlagh Pluto (ta'n perihelion oc çheu heose jeh'n ecliptagh) agh lesh ard anchaslagh. Ga dy dy vel y cruinlagh echey goaill toshiaght dy heet faggys da cruinlagh Neptune, ta foddeeaght mooar eddyr oc rere yn aavuilley (ta ny smoo na 60 keimyn scarrey uillinagh eddyr oc).

 Troyn fishigagh 
 Mooadys as reayrtys 
She 2.3 jarroo-vooadys Orcus (ta cosoylagh rish jarroo-vooadys y KBO elley 50000 Quaoar). Ayns ny kied meeghyn 2007 va pabyr soilshit magh va taishbyney dy vel Orcus cronnaghit ec fodreayrtan spoar Spitzer ayns fo-yiarg foddey, car y chied tree bleeantyn gobbraghey, as v'eh feddynit magh nagh vel Orcus agh 946.3 km er crantessen T'eh jeeaghyn dy vel ard-albedo ~ 20 % ec Orcus.

 Daaghyn as scaanyn 
Rere baghtalyn ayns fo-yiarg lesh Thie Rollageydys Yiass ny h-Oarpey ta Orcus co-yeant ass ushtey rio as co-elmintyn carboanagh. Er goll ny s'diuney, va ny scaanyn fo-yiarg goit ec yn 'odreayrtan Gemini feeraghey dy vel 15—30% ushtey rio (ny nagh row ny smoo na 50%) er y thalloo. T'eh shen, ta ny sloo ushtey rio er Orcus na t'er Charon, agh dy vel y mooad keddin er myr t'er Triton. Myrgeddin, va joaraghyn currit er y vooad rio meetane (ny sloo na 30%) er, as eh çheet er jargaght dy vel co-elmintyn elley er y phlanaid. Preprint on arXiv.

Ta KBOyn taishbyney caghlaays daaghyn as scaanyn, agh ta Orcus taishbyney daah neuchommeeagh ta neuchosoylagh rish jiargid y chorpane cosoylagh rish Ixion.

 Fo-phlannad 
Va feddyn magh fo-phlannad Orcus soilshit magh ayns IAUC 8812 er 22 Toshiaght Arree 2007http://www.johnstonsarchive.net/astro/astmoons/am-90482.html Cha nel y cruinlagh echey er fys ain foast, ansherbee.

Va'n fo-phlannad fakinit mygeayrt 0.25 arcsec veih Orcus lesh anchasley vooadys 2.7 echey. Distant EKO The Kuiper Belt Electronic newsletter, Mart 2007

Credjal dy vel albedo yn 'o-phlannad unnane as albedo Orcus, ta'n mooadys coyrlaghey da vel eh feer mooar er crantessen my vel eh cosoylit rish y phlanaid hene (~220 km).

 Ennym 
Rere stiurey cliaghtey enmys yn IAU, t'ad enmyn jeeghyn fo-halloo ta currit er corpaneyn lesh mooadys as cruinlagh cosoylagh rish Pluto. Lesh shen, hugg Brown, Trujillo as Rabinowitz yn ennym Orcus, jee ny marroo ayns feayn-skeealleydaght Romanagh, er oaie. Va'n ennym coontit as soilshit magh er 22 Sauin, 2004.
 
 Kianglaghyn magh 

 MPEC 2004-D09 fogrey magh y feddyn magh agh cur gys lieh Raymond J. Bambery, Steven H. Pravdo, Michael D. Hicks, Kenneth J. Lawrence, Daniel MacDonald, Eleanor F. Helin as Robert Thicksten / NEAT
 MPEC 2004-D13 feeraghey MPEC 2004-D09
 Duillag Chad Trujillo fo 2004 DW
 Kied art y BBC
 Kied art yn earishlioar New Scientist
 Troyn cruinlagh veih'n Thie rollageydys Lowell
 Troyn cruinlagh AstDys
 Lhiggeyder cruinlagh ass JPL (Java) / Ephemeris

 Imraaghyn 

 
Ronney:Pluteenoyn
Orcus
Orcus
Orcus
Orcus
Orcus
20040217