Astronomy:Laplace-P

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Short description: Proposed Russian spacecraft to study the Jovian moon system and land on Ganymede
Laplace-P
NamesEuropa Lander (2009–2011)
Mission typeReconnaissance by orbiter and lander
OperatorRoscosmos
Mission duration≥ 10 years
Spacecraft properties
Launch massorbiter: 4,000 kg (8,800 lb)
lander: 950 kg (2,090 lb)[1]
Dry massorbiter: 2,260 kg (4,980 lb)
lander: 550 kg (1,210 lb)
Payload massorbiter: 50 kg (110 lb)
lander: 60 kg (130 lb) [1]
Start of mission
Launch date2026 (proposed)[2]
RocketAngara-A5 with the KVTK upper stage (proposed)[3]
Orbital parameters
PeriJovian altitude900,000 km (560,000 mi)
ApoJovian altitude20,000,000 km (12,000,000 mi)
Period200 days
Ganymede lander
Landing date2030 (proposed)
 

Laplace-P (formerly called Europa Lander[1]) was a proposed orbiter and lander by the Russian Federal Space Agency designed to study the Jovian moon system and explore Ganymede with a lander.

Initially proposed to launch with the European Jupiter Icy Moons Explorer (JUICE) in 2022, this was later changed to an independent launch on an Angara-A5 in 2023.[1][4][5] The mission was cancelled due to a lack of funding in 2017.[6]

History

The Europa Lander would have been launched in 2020s as part of the Europa Jupiter System Mission proposed in 2007 by the ESA to study the Jovian moon system as well as the planet Jupiter. The orbiter would have done several flybys of other Jovian moons before being placed in orbit around Europa.[5] The lander would have researched the ocean underneath the ice sheet of Europa.[7] However, to avoid the damaging effects of Jupiter's radiation belts, the destination of the lander was switched in 2011 from Europa to Ganymede.[1] Ganymede is the largest moon in the Solar System and has an internal ocean that may contain more water than all of Earth's oceans together.[8][9]

The orbiter would perform 13 flybys of Ganymede, and 4 flybys of Callisto and carry up to 50 kg (110 lb) of scientific instruments, while the Europa lander would have carried up to 70 kg (150 lb) of scientific instruments.[10][11]

Laplace-P was cancelled in 2017 to allow more funding for the Venera-D mission.[6]

Concept

Artist's cut-away representation of the internal structure of Ganymede. Layers drawn to scale.

Laplace-P would be a dual mission featuring an orbiter (code name LP1) and a lander (code name LP2) to be launched together toward Jupiter. One spacecraft would orbit the moon Ganymede, while the lander would perform a soft landing on its surface.[1][12] The "P" in Laplace-P stands for "posadka" (landing).

The planned trajectory is to use the VEEGA (Venus-Earth-Earth Gravity Assist) route.[13] Both spacecraft would be carrying about 50 kg (110 lb) of scientific instruments each.[1] The lander would be powered by an RTG, while the orbiter would be equipped either with an RTG or with solar panels.[1] If the lander is launched together with JUICE, then the Russian orbiter would be omitted due to JUICE filling its role. The advanced Russian project Laplace-P orbiter's objectives is to map the surface for lander. The main objective of the lander is to carry out remote and in-situ investigations of Ganymede's surface.[14]

The radiation conditions on the Ganymede surface are fairly benign. On the other hand, the Ganymedean gravitational parameter (GM = 9887.8 km3/s2) makes the landing on it from the orbit more difficult than in the case of Europa.[13]

Objectives

The main objectives of the mission would have been to study Ganymede's atmosphere, icy surface, habitability, and perform an in-situ search for biosignatures.[3]

See also

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 "Russia funds a proposal to land on Jupiter's moon Ganymede". http://www.russianspaceweb.com/laplas.html. 
  2. ↑ "РФ планирует доставить свои исследовательские аппараты к Юпитеру к 2032 году" (in ru). TASS. 5 July 2016. http://tass.ru/kosmos/3432137. 
  3. ↑ 3.0 3.1 Advanced Russian Mission Laplace-P to Study the Planetary System of Jupiter: Scientific Goals, Objectives, Special Features and Mission Profile. M. B. Martynov, P. V. Merkulov, I. V. Lomakin, P. A. Vyatlev, A. V. Simonov, E. V. Leun, A. A. Barabanov, A. F. Nasyrov. Solar System Research December 2017, Volume 51, Issue 7, pp 555–562. doi:10.1134/S0038094617070127
  4. ↑ Clark, Stephen (June 19, 2013). "Russia may land probe on Jupiter's moon Ganymede with Europe's JUICE Mission". SPACE.com. http://www.space.com/21622-russia-europe-jupiter-probes.html. 
  5. ↑ 5.0 5.1 L. Zelenyi (2009). "Europa Lander: Mission Concept and Science Goals". European Planetary Science Congress. 4. EPSC2009-615-1. http://meetingorganizer.copernicus.org/EPSC2009/EPSC2009-615-1.pdf. 
  6. ↑ 6.0 6.1 Струговец, Дмитрий (15 July 2017). "Вице-президент РАН: сроки реализации лунной программы сдвинулись ради проекта «ЭкзоМарс»". TASS. https://tass.ru/opinions/interviews/4411146. 
  7. ↑ K.P. Hand (February 9–13, 2009). "Report on the Europa Lander Workshop". http://www.lpi.usra.edu/opag/march09/presentations/08hand.pdf. 
  8. ↑ Staff (March 12, 2015). "NASA's Hubble Observations Suggest Underground Ocean on Jupiter's Largest Moon". NASA News. http://www.nasa.gov/press/2015/march/nasa-s-hubble-observations-suggest-underground-ocean-on-jupiters-largest-moon/#.VQJhMM26t0s. 
  9. ↑ Clavin, Whitney (1 May 2014). "Ganymede May Harbor 'Club Sandwich' of Oceans and Ice". NASA (Jet Propulsion Laboratory). http://www.jpl.nasa.gov/news/news.php?release=2014-138. 
  10. ↑ International Workshop "Europa lander: science goals and experiments". 9–13 February 2009.
  11. ↑ International Workshop “Europa lander: science goals and experiments” (9–13 February 2009) [announcement]
  12. ↑ Golubev, Yu. F.; Grushevskii, A. V.; Koryanov, V. V.; Tuchin, A. G. (May 2014). "Gravity assist maneuvers of a spacecraft in Jupiter system". Journal of Computer and Systems Sciences International 53 (3): 445–463. doi:10.1134/S1064230714030083. ISSN 1555-6530. 
  13. ↑ 13.0 13.1 Grushevskii, A. V.; Golubev, Yu.F.; Koryanov, V.V.; Tuchin, A. G.. To the Adaptive Multibody Gravity Assist Tours Design in Jovian System for the Ganymede Landing (Report). https://issfd.org/ISSFD_2014/ISSFD24_Paper_S15-4_GRUSHEVSKII.pdf. Retrieved 2016-03-09. 
  14. ↑ Martynov, M. B.; Merkulov, P. V.; Lomakin, I. V.; Vyatlev, P. A.; Simonov, A. V.; Leun, E. V.; Barabanov, A. A.; Nasyrov, A. F. (2017). "Advanced Russian Mission Laplace-P to Study the Planetary System of Jupiter: Scientific Goals, Objectives, Special Features and Mission Profile". Solar System Research (Solar System Research, Volume 51, Issue 7, pp.555-562) 51 (7): 555. doi:10.1134/S0038094617070127. Bibcode: 2017SoSyR..51..555M. https://ui.adsabs.harvard.edu/abs/2017SoSyR..51..555M/abstract. Retrieved 26 Feb 2018. 



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