<P> The total cost of this scientific exploration mission was about US $3.26 billion, including $1.4 billion for pre-launch development, $704 million for mission operations, $54 million for tracking and $422 million for the launch vehicle . The United States contributed $2.6 billion (80%), the ESA $500 million (15%), and the ASI $160 million (5%). However, these figures are from the press kit which was prepared in October 2000 . They do not include inflation over the course of a very long mission, nor do they include the cost of the extended missions . </P> <P> The primary mission for Cassini was completed on July 30, 2008 . The mission was extended to June 2010 (Cassini Equinox Mission). This studied the Saturn system in detail during the planet's equinox, which happened in August 2009 . </P> <P> On February 3, 2010, NASA announced another extension for Cassini, lasting 6 ​ ⁄ years until 2017, ending at the time of summer solstice in Saturn's northern hemisphere (Cassini Solstice Mission). The extension enabled another 155 revolutions around the planet, 54 flybys of Titan and 11 flybys of Enceladus . In 2017, an encounter with Titan changed its orbit in such a way that, at closest approach to Saturn, it was only 3,000 km above the planet's cloudtops, below the inner edge of the D ring . This sequence of "proximal orbits" ended when its final encounter with Titan sent the probe into Saturn's atmosphere to be destroyed . </P> <Table> <Tr> <Th_colspan="7"> Selected destinations (ordered by size but not to scale) </Th> </Tr> <Tr> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> Titan </Td> <Td> Earth's Moon </Td> <Td> Rhea </Td> <Td> Iapetus </Td> <Td> Dione </Td> <Td> Tethys </Td> <Td> Enceladus </Td> </Tr> <Tr> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> Mimas </Td> <Td> Hyperion </Td> <Td> Phoebe </Td> <Td> Janus </Td> <Td> Epimetheus </Td> <Td> Prometheus </Td> <Td> Pandora </Td> </Tr> <Tr> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> Helene </Td> <Td> Atlas </Td> <Td> Pan </Td> <Td> Telesto </Td> <Td> Calypso </Td> <Td> Methone </Td> </Tr> </Table>

How many orbits did cassini make around saturn