June[]
- June 4: Quaoar is discovered.
July[]
- July 3: CONTOUR is launched.
- July 23: Sao is discovered.
August[]
- August 10: Halimede is discovered.
- August 11: Laomedeia is discovered.
- August 15: Contact is lost with CONTOUR.
October[]
- October 31: Arche is discovered.
November[]
- November 2: Stardust visits the asteroid Annefrank.