Is Sedna another Triton? M. A. Barucci, D. P. Cruikshank, E. Dotto, F. Merlin, F. Poulet, C. Dalle Ore, S. Fornasier and C. de Bergh A&A, 439 2 (2005) L1-L4 Published online: 29 July 2005 DOI: 10.1051/0004-6361:200500144