148780 Altjira /ælˈtʃɪrə/ is a binary classical Kuiper belt object (cubewano).

[4] The Altjiran lightcurve is quite flat (Δmag<0.10), which is indicative of a "quasi-spherical body with a homogeneous surface".

[7] The satellite's orbit has the following parameters: semi-major-axis, 9904 ± 56 km; period, 139.561 ± 0.047 days; eccentricity, 0.3445 ± 0.0045; and inclination, 35.19 ± 0.19°(retrograde).

[5] It was named after the Arrernte creation deity, Altjira, who created the Earth during the Dreamtime and then retired to the sky.

[1] Altjira may be an unresolved hierarchical triple system.