List of minor planets and comets visited by spacecraft

Columns: Name | Diameter ( km ) | Body Discovered | Spacecraft | Year | Notes
2 P/Encke | 4.8 | January 17 , 1786 | CONTOUR | 1998 | Spacecraft lost while leaving Earth orbit | 6 P/d'Arrest | 3.2 | June 28 , 1851 | CONTOUR | 2008 | Spacecraft lost while leaving Earth orbit | 73 P/Schwassmann-Wachmann | 1.1 ( before breakup ) | May 2 , 1930 | CONTOUR | 2006 | Spacecraft lost while leaving Earth orbit | 140 Siwa | 103 | October 13 , 1874 | Rosetta | 2007 | Target changed due to launch postponement | 145 Adeona | 151 | June 3 , 1875 | Dawn | 2016 | Abandoned target ( not seriously considered ) | 449 Hamburga | 86 | October 31 , 1899 | CRAF | 1998 | Mission cancelled | 1620 Geographos | 5.1×1.8 | September 14 , 1951 | Clementine | 1995 | Mission failed before retargeting

Example questions:
What is the orbit period of the comet visited by the spacecraft that failed shortly after its July 2002 launch ? | On which date was the space project launched to probe the stony asteroid discovered by Albert George Wilson and Rudolph Minkowski ? | What was the program that consisted of the spacecraft that probed the rare-type asteroid with a diameter of 2 kilometers ? | Which agency built the space probe to explore this asteroid first discovered by Johann Palisa ? | What is the diameter of the asteroid probed by the Soviet spacecraft that weighed 10,850 pounds ?

Answers:
3.3 years | January 25 , 1994 | New Millennium Program | European Space Agency | 1 kilometer