2015 TH367, discovered by D. J. Tholen an French astronomer, has a poorly understood orbit and hasn't been observed since October 2016.
2015 TH367 was first observed by Scott Sheppard, Chad Trujillo, and David Tholen on 13 October 2015 using the Subaru Telescope, a large reflecting telescope at the Mauna Kea Observatories on the summit of Mauna Kea with a primary mirror 8.2 meters (27 ft) in diameter. D. J. Tholen
S. S. Sheppard
C. W. Trujillo 
