90482 Orcus

**Orcus**
	Reayrt er Orcus veih'n Fodreayrtan Spoar Hubble.
Feddyn magh
Feddynit magh ec	M. Brown,; C. Trujillo,; D. Rabinowitz
Date feddyn magh	17 Toshiaght Arree, 2004
Enmyssyn
Enmyn elley	2004 DW
Ronney; mynphlanaid	pluteeno
Troyn cruinlagh
	Amm 10 Sauin, 1951 (JD 2433960.5)
Aphelion	7,226.801 Gm; 48.31 AU
Perihelion	4,567.091 km; 30.53 AU
Essylys lieh-vooar	5,896.946 Gm; 39.419 AU
Corrid	0.22552
Amm cruinlagh	90,396.4 laaghyn; 247.492 bleeantyn
Mean-vieauid cruinlagh	4.68 km/s
Anleigh meanagh	79.561°
Cleayn	20.55233°
Dowan-liurid y noad ardjeeagh	268.586°
Parameadar helion	73.8325°
Fo-phlannadyn	1 (92-432 km)
Troyn fishigagh
Towseyn	946.3+74.1−72.3 km (crantessen)
Glout	~7.5×1020 kg
Glooaght meanagh	~1.5 g/cm³
Ym-hayrn eaghtyragh meanchiarkylagh	~0.2 m/s²
Bieauid cosnee	~0.44 km/s
Amm çhyndaaee	13.19h
Albedo	19.75+3.40-2.76 %
Çhiassid	~45 K
Sorçh scaanagh	B-V=0.68; V-R=0.37
Mooadys baghtal	19.1 (noiys)
Jarroo-vooadys	2.3

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[reagh | edit source]

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[reagh | edit source]

Mooadys as reayrtys[reagh | edit source]

Orcus cosoylit rish Eris, Pluto, Makemake, (136108) 2003 EL₆₁, Sedna, Varuna, Quaoar, as y Chruinney.

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 km er crantessen^[1] T'eh jeeaghyn dy vel ard-albedo ~ 20 % ec Orcus.

Daaghyn as scaanyn[reagh | edit source]

Rere baghtalyn ayns fo-yiarg lesh Thie Rollageydys Yiass ny h-Oarpey ta Orcus co-yeant ass ushtey rio as co-elmintyn carboanagh.^[6] 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.^[7]

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

Fo-phlannad[reagh | edit source]

Va feddyn magh fo-phlannad Orcus soilshit magh ayns IAUC 8812 er 22 Toshiaght Arree 2007^[8] 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.^[9]

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[reagh | edit source]

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 mooie[reagh | edit source]

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[reagh | edit source]

↑ ^1.0 ^1.1 Stansberry, J.; Grundy, W.; Brown, M.; et.al. (2007). "Physical Properties of Kuiper Belt and Centaur Objects: Constraints from Spitzer Space Telescope".
↑ Overlooked dwarf planet candidates. BBC (19-02-2008). Feddynit er 2008-07-25.
↑ Tegler, Stephen C. (26-01-2006). Kuiper Belt Object Magnitudes and Surface Colors. Feddynit er 05-11-2006.
↑ HORIZONS Web-Interface. JPL Solar System Dynamics. Feddynit er 02-07-2008.
↑ JPL Small-Body Database Browser: 90482 Orcus (2004 DW) (10-02-2008 baght. jerrinagh). Feddynit er 02-07-2008.
↑ C. de Bergh, A. Delsanti, G. P. Tozzi, E. Dotto, A. Doressoundiram and M. A. Barucci (2005). "The Surface of the Transneptunian Object 9048 Orcus". Astronomy & Astrophysics. Ym-lioar 437: 1115–1120. doi:10.1051/0004-6361:20042533.
↑ Chadwick A. Trujillo, Michael E. Brown, David L. Rabinowitz, Thomas R. Geballe (2005). "Near Infrared Surface Properties of the Two Intrinsically Brightest Minor Planets (90377) Sedna and (90482) Orcus". The Astrophysical Journal. Ym-lioar 627: 1057–1065. doi:10.1086/430337. Preprint on arXiv.
↑ http://www.johnstonsarchive.net/astro/astmoons/am-90482.html
↑ Distant EKO The Kuiper Belt Electronic newsletter, Mart 2007

Corpaneyn Harrish-Neptuneagh

Pluteeno	Pluto · 1993 SB · 1993 SC · 1994 JR₁ · 1994 TB · 1995 QZ₉ · 1996 SZ₄ · 1996 TP₆₆ · 1996 TQ₆₆ · 1997 QJ₄ · 1998 HK₁₅₁ · 1998 US₄₃ · 1998 VG₄₄ · 1998 WW₂₄ · 1998 WU₃₁ · Rhadamanthus · 1999 TC₃₆ · Huya · Ixion · 2002 KX₁₄ · 2002 VR₁₂₈ · 2003 VS₂ · Orcus · 1993 RO · 1993 RP · 2003 AZ₈₄ · 2001 QF₂₉₈
Cubewano	1992 QB₁ · 1994 GV₉ · 1994 JQ₁ · 1994 VK₈ · 1995 GJ · 1995 SM₅₅ · 1996 TO₆₆ · Logos · 1997 CS₂₉ · 1997 CU₂₉ · 1998 HJ₁₅₁ · 1998 HP₁₅₁ · 1998 HM₁₅₁ · 1998 KR₆₅ · Chaos · 1998 WA₂₅ · 1999 DF₉ · 1999 HT₁₁ · Deucalion · Varuna · 2002 AW₁₉₇ · Quaoar · 2002 TX₃₀₀ · 2002 UX₂₅ · 2003 EL₆₁ · 2003 OP₃₂ · 2004 GV₉ · Makemake¹ · 2005 RN₄₃ · Teharonhiawako · 1998 WW₃₁ · 2002 MS₄ · 2003 MW₁₂ · 2003 QW₉₀
Twotino	1996 TR₆₆ · 1998 SM₁₆₅ · 1999 RB₂₁₆ · 2000 JG₈₁ · 2002 WC₁₉ · 1997 SZ₁₀
Corpaneyn aavingyssagh elley	1994 JS · 1995 DA₂ · 1998 WA₃₁ · 1999 CP₁₃₃ · 1999 DE₉ · 1999 HB₁₂ · 2001 KC₇₇ · 2001 KP₇₇ · 2002 TC₃₀₂ · 2003 LG
Corpaneyn y disc orçhit	Eris^{1, 2} · 1995 TL₈ · 1996 GQ₂₁ · 1996 TL₆₆ · 1999 CC₁₅₈ · 2000 EE₁₇₃ · 2000 OO₆₇ · 2000 OM₆₇ · 2001 UR₁₆₃ · 2002 CY₂₂₄ · 2002 GX₃₂ · 2002 RP₁₂₀ · Sedna² · 2005 RM₄₃ · 2000 CR₁₀₅ · 2004 XR₁₉₀ · 2005 TN₇₄ · 2006 QH₁₈₁
Neu-horçhit	1997 CR₂₉ · 1998 SN₁₆₅ · 1999 CL₁₅₈ · 1999 HC₁₂ · 1999 KR₁₆ · 1999 OY₃ · 2003 FY₁₂₈ · 2004 SB₆₀ · 2004 TY₃₆₄ · 2005 RR₄₃
Fo-phlannadyn	Charon (Pluto) · Hydra (Pluto) · Nix (Pluto · Dysnomia (Eris) · S/2000 (1998 WW₃₁) 1 · S/2005 (136108) 1 · S/2005 (136108) 2 · Zoe (Logos) · S/2005 (79360) 1 · Sawiskera (Teharonhiawako)

¹ Rang-oardaghit myr planaid crivassanagh myrgeddin.
² Ta Eris as Sedna rang-oardaghit myr SDO, agh foddee dy vel ad nyn gooid jeh'n Bodjal Oort çheusthie, ansherbee.

[Stansberry_2007-1] 1.0 ^1.1 Stansberry, J.; Grundy, W.; Brown, M.; et.al. (2007). "Physical Properties of Kuiper Belt and Centaur Objects: Constraints from Spitzer Space Telescope".

[BBC_h2g2-2] Overlooked dwarf planet candidates. BBC (19-02-2008). Feddynit er 2008-07-25.

[3] Tegler, Stephen C. (26-01-2006). Kuiper Belt Object Magnitudes and Surface Colors. Feddynit er 05-11-2006.

[Horizons-4] HORIZONS Web-Interface. JPL Solar System Dynamics. Feddynit er 02-07-2008.

[jpldata-5] JPL Small-Body Database Browser: 90482 Orcus (2004 DW) (10-02-2008 baght. jerrinagh). Feddynit er 02-07-2008.

[deBergh2005-6] C. de Bergh, A. Delsanti, G. P. Tozzi, E. Dotto, A. Doressoundiram and M. A. Barucci (2005). "The Surface of the Transneptunian Object 9048 Orcus". Astronomy & Astrophysics. Ym-lioar 437: 1115–1120. doi:10.1051/0004-6361:20042533.

[Trujillo2005-7] Chadwick A. Trujillo, Michael E. Brown, David L. Rabinowitz, Thomas R. Geballe (2005). "Near Infrared Surface Properties of the Two Intrinsically Brightest Minor Planets (90377) Sedna and (90482) Orcus". The Astrophysical Journal. Ym-lioar 627: 1057–1065. doi:10.1086/430337. Preprint on arXiv.

[8] ttp://www.johnstonsarchive.net/astro/astmoons/am-90482.html

[EKO51-9] Distant EKO The Kuiper Belt Electronic newsletter, Mart 2007

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