Orbital elements and other data (Assumed or derived values in parenthesis, my estimates in italics and parenthesis. Source identifications in brackets, see this link for sources):

Primary discovered 21 October 2003 by M. E. Brown, C. A. Trujillo, and D. Rabinowitz from Palomar Observatory, announced 2005 with provisional designation 2003 UB₃₁₃. Linked to observations from 1954. Permanent number assigned 7 September 2006, name assigned 14 September 2006.

Companion discovered by M. E. Brown et al. by observations from the Keck II adaptive optics telescope made 10 September 2005; announced 1 October 2005. Name assigned 14 September 2006.

Eris had been nicknamed "Xena" by the discovery team, who had also nicknamed the satellite "Gabrielle".

See more information and links at Asteroid/Comet Connection Catchall Catalog page

• IAUC 8747
• IAUC 8610
• MPEC 2005-O41: 2003 UB313
• Discovery of a planetary-sized object in the scattered Kuiper belt
• Provisional geocentric ephemeris of 2003 UB 313, 10 day steps

--Links, less technical:

• All hail Eris and Dysnomia.
• The discovery of 2003 UB313, the 10th planet.
• 2003 UB313, the 10th planet, has a moon!
• Gemini Observatory Shows That "10th Planet" Has a Pluto-Like Surface
• New Planet Discovered
• Astronomers detect '10th planet'
• 2003 UB313 orbit diagram
• Object Bigger than Pluto Discovered, Called 10th Planet
• 2003 UB313: A Tenth Planet?
• Solar system gets bigger
• "The Tenth Planet"--2003 UB313
• 2003 UB313

--Links to ADS abstracts:

• Sheppard, Scott S. 2007, ArXiv e-prints Light Curves of Dwarf Plutonian Planets and other Large Kuiper Belt Objects: Their Rotations, Phase Functions and Absolute Magnitudes
• Schaller, E. L. & Brown, M. E. 2007, Astrophysical Journal Volatile Loss and Retention on Kuiper Belt Objects
• Emery, J. P., Dalle Ore, C. M., Cruikshank, D. P., Fernández, Y. R., Trilling, D. E., & Stansberry, J. A. 2007, Astronomy and Astrophysics Ices on (90377) Sedna: confirmation and compositional constraints
• Brown, M. E., Barkume, K. M., Blake, G. A., Schaller, E. L., Rabinowitz, D. L., Roe, H. G., & Trujillo, C. A. 2007, Astronomical Journal Methane and Ethane on the Bright Kuiper Belt Object 2005 FY9
• Rabinowitz, David L., Schaefer, Bradley E., & Tourtellotte, Suzanne W. 2007, Astronomical Journal The Diverse Solar Phase Curves of Distant Icy Bodies. I. Photometric Observations of 18 Trans-Neptunian Objects, 7 Centaurs, and Nereid
• Bernstein, M. P., Mastrapa, R., & Sandford, S. 2006, AGU Fall Meeting Abstracts Near IR spectra and real and imaginary indicies of refraction of ices of relevance to KBOs
• Cooper, J. F., Hill, M. E., Richardson, J. D., & Sturner, S. J. 2006, AGU Fall Meeting Abstracts Cosmic Ray Mantle Visibility on Kuiper Belt Objects
• Carraro, G., Maris, M., Bertin, D., & Parisi, M. G. 2006, Astronomy and Astrophysics Time series photometry of the dwarf planet ERIS (2003 UB313)
• Hussmann, Hauke, Sohl, Frank, & Spohn, Tilman 2006, Icarus Subsurface oceans and deep interiors of medium-sized outer planet satellites and large trans-neptunian objects
• Licandro, J., Grundy, W. M., Pinilla-Alonso, N., & Leisy, P. 2006, Astronomy and Astrophysics Visible spectroscopy of 2003 UB313: evidence for N2 ice on the surface of the largest TNO?
• Green, D. W. E. 2006, International Astronomical Union Circular (134340) Pluto, (136199) Eris, and (136199) Eris I (Dysnomia)
• Bernstein, Max, Sandford, S., & Cruikshank, D. 2006, AAS/Division for Planetary Sciences Meeting Abstracts Near IR Spectra of H2O/CH4 And H2O/CO2 Ice Mixtures of Relevance to the Outer Solar System
• Rabinowitz, David L., Schaefer, B. E., & Tourtellotte, S. W. 2006, AAS/Division for Planetary Sciences Meeting Abstracts The Fresh Icy Surfaces of Pluto-sized Trans-Neptunian Objects
• Merlin, Frederic, Dumas, C., Barucci, M., Hainaut, O., de Bergh, C., & Guilbert, A. 2006, AAS/Division for Planetary Sciences Meeting Abstracts Spectroscopic Analyses Of The Bright TNOs 2003 UB313 And 2003 EL61
• Brown, Michael E. 2006, AAS/Division for Planetary Sciences Meeting Abstracts The Largest Kuiper Belt Objects
• McKinnon, William B. & Barr, A. C. 2006, AAS/Division for Planetary Sciences Meeting Abstracts Structure and Evolution of Ice Dwarf Planets
• Sheppard, S. S. 2006, New Horizons in Astronomy: Frank N. Bash Symposium Small Bodies in the Outer Solar System
• Lin, H. W., Wu, Y. L., & Ip, W. H. 2006, 36th COSPAR Scientific Assembly The lightcurves of 2003 UB 313
• Brasser, R., Duncan, M. J., & Levison, H. F. 2006, Icarus Embedded star clusters and the formation of the Oort Cloud
• Gladman, Brett & Chan, Collin 2006, Astrophysical Journal Production of the Extended Scattered Disk by Rogue Planets
• Brown, M. E., Schaller, E. L., Roe, H. G., Rabinowitz, D. L., & Trujillo, C. A. 2006, Astrophysical Journal Direct Measurement of the Size of 2003 UB313 from the Hubble Space Telescope
• Brown, M. E., van Dam, M. A., Bouchez, A. H., Le Mignant, D., Campbell, R. D., Chin, J. C. Y., Conrad, A., Hartman, S. K., Johansson, E. M., Lafon, R. E., Rabinowitz, D. L., Stomski, P. J., Jr., Summers, D. M., Trujillo, C. A., & Wizinowich, P. L. 2006, Astrophysical Journal Satellites of the Largest Kuiper Belt Objects
• Bertoldi, F., Altenhoff, W., Weiss, A., Menten, K. M., & Thum, C. 2006, Nature The trans-neptunian object UB₃₁₃ is larger than Pluto
• Sheppard, Scott S. 2006, Nature Solar system: A planet more, a planet less?
• Brown, M. E., Trujillo, C. A., & Rabinowitz, D. L. 2005, Astrophysical Journal Discovery of a Planetary-sized Object in the Scattered Kuiper Belt
• Reddy, Francis 2005, Astronomy The tenth planet
• Brown, M. E. 2005, Central Bureau Electronic Telegrams, 240, 1 (2005). Edited by Green, D. W. E. S/2005 (2003 UB313) 1
• Brown, M. E., Trujillo, C. A., Rabinowitz, D., Tourtellotte, S., & Marsden, B. G. 2005, Minor Planet Electronic Circulars 2003 UB313
• Brown, Michael 2005, HST Proposal Direct measurement of the size of 2003 UB313

© 2005-2007, 2008 by Wm. Robert Johnston.
Last modified 30 December 2008.
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