4035 Thestor, provisional designation: 1986 WD, is a large Jupiter trojan from the Greek camp, approximately 68 kilometers (42 miles) in diameter.
[15] On 14 May 2021, the object was named by the Working Group for Small Bodies Nomenclature (WGSBN), after Thestor from Greek mythology, who was a grandson of Apollo and the father of Calchas.
[2] Before Thestor was named, it belonged to a small group of only 8 unnamed minor planets with a designated number smaller than 5000.
[4] In October 2009, a rotational lightcurve was obtained from photometric observations by astronomer Stefano Mottola at the Calar Alto Observatory in Spain.
[8][7][9] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0548 and a diameter of 68.23 kilometers based on an absolute magnitude of 9.6.