148780 Altjira

148780 Altjira appears to be a triple or contact binary double classical Kuiper belt object. The secondary is large compared to the primary, approximately vs.. The lightcurve is quite flat, which is indicative of a "quasi-spherical body with a homogeneous surface".
The system mass is.
Its companion was discovered on 6 August 2006, from images taken by the Hubble Space Telescope. The secondary's orbit has the following parameters: semi-major-axis, ; period, ; eccentricity, ; and inclination, . There is indirect evidence that Altjira may be an unresolved hierarchical triple system.
In 2008, Altjira was named after the Arrernte creation deity, Altjira.