TheUppsala–DLR Trojan Survey (UDTS, also known asUAO–DLR Trojan Survey) is anastronomical survey to study the movements and locations ofasteroids nearJupiter, which includesJupiter trojans and other asteroids, which line-of sight are frequently blocked by the giant planet.

The survey was carried out at theUppsala Astronomical Observatory inSweden, in collaboration with theGerman Aerospace Center (DLR). Principal investigators were the astronomersClaes-Ingvar Lagerkvist, Gerhard Hahn,Stefano Mottola, Magnus Lundström andUri Carsenty. The Uppsala–DLR Trojan Survey, UDTS, should not be confused with its successor, theUppsala-DLR Asteroid Survey (UDAS), which started shortly after the UDTS concluded.

During the course of the survey, two telescopes were used atESO'sLa Silla site in northern Chile. In fall of 1996, theESO Schmidt telescope surveyed approximately 900deg2 at Jupiter'sL₄Lagrangian point, location of the so-calledGreek camp. Additional positions and magnitudes of asteroids were obtained using the (now decommissioned)0.61-meter Bochum telescope.

There is some notable controversy overP/1997 T3, one of the objects found in this survey, namely an asteroid-like object with acomet-like tail. It is thought that this tail is composed of dust, due to its consistent appearance, and the fact that it is pointing towards the Sun, not away from it.^{[citation needed]}

The group of Jupiter trojan contains about 6,000 asteroid. They are named after figures fromGreek mythology, typically after the heroes of theTrojan War as narrated in Homer'sIliad.

TheMinor Planet Center credits the Uppsala–DLR Trojan Survey with the discovery of 62 numbered minor planets during 1996–1997.^[1]

• List of asteroid-discovering observatories
• List of minor planet discoverers § Discovering dedicated institutions
• Uppsala–ESO Survey of Asteroids and Comets, UESAC

• Comet or Asteroid?
• TrojansArchived 2008-05-11 at theWayback Machine

• Astronomical surveys
• Asteroid surveys
• Discoveries by the Uppsala-DLR Trojan Survey
• Uppsala University

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