[1] It used the robotic 1.2 m Samuel Oschin Telescope at Palomar Observatory and the QUEST large-area CCD camera in 2007 and 2008.
The survey was designed to identify putative members of a Sedna-like population with perihelia greater than 45 AU.
The limiting magnitude of this study was 21.3 in the R-band; it was sensitive out to distances of 1000 AU, and 12,000 square degrees of sky were searched.
This observing program was responsible for the discovery of 25 minor planets including trans-Neptunian objects and centaurs.
It redetected Sedna but no other objects in Sedna-like orbits were identified.