Astronomy:New Horizons 2

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Short description: Proposed NASA mission
Design of the first New Horizons spacecraft

New Horizons 2 (also New Horizons II, NHII, or NH2) was a proposed mission to the trans-Neptunian objects by NASA. It was conceived as a planetary flyby mission in 2002, based on the New Horizons spacecraft, which was in development at the time.[1][2] In March 2005, the proposal was not selected for further development because of a shortage of plutonium-238 needed for the radioisotope thermoelectric generator (RTG).[3] The New Horizons 2 study was funded by the New Frontiers program, and delivered to the U.S. Congress in June 2005.[4]

Description

New Horizons 2 was included in the tentative budget for the New Frontiers program missions.[5] In 2004, the United States Senate on Appropriations Committee provided additional funding for New Horizons 2, a new Kuiper belt mission.[6] As early as 2004, there was a conference on how to make the most use of New Horizons 2's Uranus flyby.[7]

Candidate targets included 47171 Lempo, a system that, like Pluto–Charon, contains multiple bodies.[5] The mission plan for Lempo also included flybys of Jupiter and Uranus,[5] and perhaps four Kuiper belt objects (KBO).[2] There was a lot of flexibility: even without a gravity assist, any KBO within 50 AU and a 20-year flight time was possible.[3] A flyby of Neptune's largest moon Triton was also considered, with 66652 Borasisi as a potential follow-on.[3] 55637 Uni was also considered for a visit, as it had a similar orbit to Lempo.[8]

See also

References

  1. ↑ Portree, David S. F. (May 22, 2012). "New Horizons II (2004-2005)". https://www.wired.com/2012/05/new-horizons-ii-2004-2005/. 
  2. ↑ 2.0 2.1 Stern, Alan; Binzel, Rick; Levison, Hal; Lopes, Rosaly; Millis, Bob; Moore, Jeff. "New Horizons 2". Lunar and Planetary Institute. http://www.lpi.usra.edu/opag/new_horizons2.pdf. 
  3. ↑ 3.0 3.1 3.2 Anderson, Kenneth; Bearden, David et al. (May 31, 2005). Final report of the New Horizons II review panel (Report). Lunar and Planetary Institute. http://www.lpi.usra.edu/opag/nh2_final_report.pdf. 
  4. ↑ "Presentation: SSE Decadal Survey and New Horizons: A Rough Start". June 2005. http://www.lpi.usra.edu/opag/meetings/jun2005/presentations/NH2_Decadal_API.pdf. 
  5. ↑ 5.0 5.1 5.2 Bruno, Claudio; Czysz, Paul A. (2009). Future spacecraft propulsion systems: enabling technologies for space exploration. Springer Praxis books in astronautical engineering (2. ed.). Berlin: Springer. p. 378. ISBN 978-3-540-88814-7. https://books.google.com/books?id=aI9QhDA4AVwC&pg=PA378. 
  6. ↑ Stern, Alan (October 5, 2004). "New Horizons For Planetary Exploration". http://www.spacedaily.com/news/outerplanets-04h.html. 
  7. ↑ Moore, Jeff (June 5, 2004). "Revolution Afoot– Cheaper, More Frequent Outer Planets Missions – New Horizons II Workshop". https://spacenews.com/revolution-afoot-cheaper-more-frequent-outer-planets-missions-new-horizons-ii-workshop/. 
  8. ↑ Portree, David S. F. (14 July 2015). "No Shortage of Dreams: New Horizons II (2004-2005)". http://spaceflighthistory.blogspot.com/2015/07/new-horizons-ii-2004-2005.html. 



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