225088 Gonggong

Gonggong 🝽
Oppdagelse[1]
Oppdaget avMichael E. Brown, David Lincoln Rabinowitz, Megan Schwamb[!]
Oppdaget17. juli 2007
Oppdaget fraPalomar Observatory
Småplanetnavn(225088) Gonggong
Overgangsnavn2007 OR10
Oppkalt etterGonggong[!]
Objekttyperesonant transneptunsk objekt, possible dwarf planet[!]
Gruppe3:10-resonant trans-Neptunian object[!]
Baneegenskaper[2]
Epoke 8. februar 2011
Moderlegemesolen
SatellitterXiangliu[!]
Aphelium100.79 AE (Q)
15.1 Tm
Perihelium33.62 AU (q)
5.03 Tm
Store halvakse67.21 AU (a)
10.054 Tm
Eksentrisitet0.500
Omløpstid550,98 år
Midlere anomali101.0° (M)°
Inklinasjon30,70°
Lengden til oppstigende knute336.86°
Perihelargument207.18°
Fysiske egenskaper
Dimensjoner1200+300
−200 km[3]
1280±210 km[4]
Masse1 750 000 000 000 000 000 000 kilogram
Overflaterefleksjon≈ 0.18 (antatt fra spektrum)[3]
0.185+0.076
−0.052[4]
Spektralklasserød[3]
Tilsynelatende størrelsesklasse21,3[5]
Absolutt størrelsesklasse (MV)2,0[2]
Kilder
JPL-idlenke
[[:commons:225088 Gonggong|Gonggong 🝽 på Commons]]

225088 Gonggong (symbol: 🝽), før 29. mai 2019 kalt (225088) 2007 OR10, er et svært stort transneptunsk objekt. Det anslås å være mellom Haumea og Sedna i størrelse. Massen har aldri blitt målt, og diameteren er ikke godt kjent. Noen astronomer betrakter den som en dvergplanet.[6][7] og andre betrakter det som sannsynlig at den er en,[8] selv om den ikke har blitt formelt anerkjent av IAU.[9]

Referanser

  1. ^ «MPEC 2009-A42 : 2007 OR10» (på engelsk). Minor Planet Center. 7. januar 2009. Besøkt 9. juni 2012. 
  2. ^ a b «JPL Small-Body Database Browser: 225088 (2007 OR10)» (på engelsk). 6. november 2009. Besøkt 9. juni 2012. 
  3. ^ a b c Mike Brown; Burgasser, A.J.; Fraser W.C. (2011). «The Surface Composition of Large Kuiper Belt Object 2007 OR10» (PDF) (på engelsk). Mike Browns nettsted. arXiv:1108.1418 Åpent tilgjengelig. Besøkt 9. juni 2012. 
  4. ^ a b Santos-Sanz, P., Lellouch, E., Fornasier, S., Kiss, C., Pal, A., Müller, T. G., Vilenius, E., Stansberry, J., Mommert, M., Delsanti, A., Mueller, M., Peixinho, N., Henry, F., Ortiz, J. L., Thirouin, A., Protopapa, S., Duffard, R., Szalai, N., Lim, T., Ejeta, C., Hartogh, P., Harris, A. W., & Rengel, M. (2012). “TNOs are Cool”: A Survey of the Transneptunian Region IV - Size/albedo characterization of 15 scattered disk and detached objects observed with Herschel Space Observatory-PACS
  5. ^ «AstDys 2007OR10 Ephemerides». Department of Mathematics, University of Pisa, Italy. Arkivert fra originalen 17. mai 2009. Besøkt 16. mars 2009. 
  6. ^ Mike Brown. «How many dwarf planets are there in the outer solar system? (updates daily)» (på engelsk). California Institute of Technology. Arkivert fra originalen 18. oktober 2011. Besøkt 9. juni 2012. 
  7. ^ «Ice & Maybe Methane on 'Snow White' Dwarf Planet» (på engelsk). Keck-observatoriet. 22. august 2011. Arkivert fra originalen 25. februar 2012. Besøkt 9. juni 2012. 
  8. ^ Sheppard, Scott S. (2011). «A Southern Sky and Galactic Plane Survey for Bright Kuiper Belt Objects». Astronomical Journal. 142 (4). Bibcode:2011AJ....142...98S. arXiv:1107.5309 Åpent tilgjengelig. doi:10.1088/0004-6256/142/4/98. 
  9. ^ «List of Dwarf Planets» (på engelsk). NASA. Arkivert fra originalen 4. mai 2012. Besøkt 9. juni 2012. 

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