Thule

I have reached these lands but newly // From an ultimate dim Thule.

For distant India tremble may // Beneath your mighty rule, // And Thulé⁵ bow beneath your sway // Far in the Northern sea, // But if to care and want you’re prey, // No king are you, but slave.

5. To the Romans Thulé, variously identified as Iceland or Mainland in the Shetland Isles, marked the extreme northern limit of the known world, just as India here stands for the farthest east.

For the purposes of discussion, MU₆₉’s larger and smaller lobes have been informally designated “Ultima” and “Thule,” respectively, by the New Horizons team. Ultima and Thule have best-fit measured diameters of ~19.5 and ~14.2km, respectively, with errors of only a few percent at this time.

Ultima and Thule have similar colors with measured albedos ∼0.06, indicating that UT is a typical member of the Cold Classical Kuiper Belt class of objects.