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2012 DR30 is a recently discovered Solar System object on a unique orbit,with a high eccentricity of 0.9867, a perihelion distance of 14.54 AU and asemi-major axis of 1109 AU, in this respect outscoring the vast majority oftrans-Neptunian objects. We performed Herschel/PACS and optical photometry touncover the size and albedo of 2012 DR30, together with its thermal and surfaceproperties. The body is 185 km in diameter and has a relatively low V-bandgeometric albedo of ~8%. Although the colours of the object indicate that 2012DR30 is an RI taxonomy class TNO or Centaur, we detected an absorption featurein the Z-band that is uncommon among these bodies. A dynamical analysis of thetarget's orbit shows that 2012 DR30 moves on a relatively unstable orbit andwas most likely only recently placed on its current orbit from the most distantand still highly unexplored regions of the Solar System. If categorised ondynamical grounds 2012 DR30 is the largest Damocloid and/or high inclinationCentaur observed so far.

A portrait of the extreme Solar System object 2012 DR30