The Titan Saturn System Mission (TSSM) is a proposed joint NASA-ESA mission to conduct in-depth exploration of Titan and Enceladus. The mission would include an orbiter carrying instruments to study Titan's atmosphere, surface and interior. It would also deploy a hot air balloon and lake lander to conduct in situ measurements. The orbiter would tour Saturn's system for over 9 years, performing multiple close flybys of Titan and Enceladus to advance understanding of processes on these moons beyond what was possible with the Cassini-Huygens mission.

1. TSSM TSSM JSDT Chairs : J. Lunine, J-P. Lebreton Lead Scientists : A. Coustenis, D. Matson, C. Hansen L. Bruzzone, M-T. Capria, J. Castillo-Rogez, A. Coates, M. Dougherty, A. Ingersoll, R. Jaumann, W. Kurth, M-L. Lara, C. McKay, R. Lopes, R. Lorenz, C. P. McKay, I. M üller-Wodarg, O . Prieto-Ballesteros, F. Raulin, A. Simon-Miller, E. Sittler, J. Soderblom, F. Sohl, C. Sotin, D. Stevenson, E. Stofan, G. Tobie, T. Tokano, P. Tortora, E. Turtle, H. Waite Study managers : Ch. Erd, K. Reh

4. Aug. 7, 2008 Geology Lakes of ethane Dunes Titan’s surface: Dunes, mountains, lakes Fluvial erosion

5. Titan after Huygens One site well understood from Huygens lander Titan’s surface

6. Titan rivals the earth in complexity Silicate core Internal liquid ocean beneath a water ice crust Cryovolcanism? Lakes, dunes, mountains Thick nitrogen atmosphere with organic haze Clouds and rain

8. Titan as an object is of keen interest for all areas of planetary science

11. ISS Color Mosaic Rev 11 Enceladus Small moon of Saturn (~500 km diameter) Surface composed of water ice Bluish fissures crossing the south pole dubbed “tiger stripes” Water vapor and ice particles spew out of fissures

12. Enceladus: The little moon with active geysers

13. Titan‘s link to Saturn and Enceladus: A rich magnetospheric connection

20. Trace Matrix flows from the three goals to measurements, then instruments For planning and discussion purposes only

23. Mission Timeline For planning and discussion purposes only

24. 2 Year Saturn Tour Sun For planning and discussion purposes only Four polar flybys at 100 km 300 km flyby at 40º S Two 1,000 km Flybys at 20º N 7 Close Enceladus Flybys Montgolfiere released at first Titan flyby Lake lander released at second Titan flyby

26. ~ 2 Year Titan Orbit Nov 2008 For planning and discussion purposes only View from orbit normal View from Earth 2.5 hr. Variation in LST time of orbit and radio occultations at wide range of latitudes. Saturn’s Gravity Rotates Orbit Plane 2 Months Aerobraking and Aerosampling 20 Months in Circular Polar Orbit In situ sampling of Titan’s entire southern hemisphere below 1,000 km. first orbit Latitude [deg] Altitude [km.] 90S 90N 0 60S 30S 60N 30N 500 1000 1500

27. Titan seasonal cycle: exploration coverage

30. BACKUP For planning and discussion purposes only

31. Phase E Timeline 06 Nov 2008 For planning and discussion purposes only

33. Titan: Complex surface, atmosphere and organics detached haze lakes aeolian patterns river channels mountains huge cloud systems wind driven dunes drainage channels chemically complex atmosphere Heavy -ion chemistry Very few craters lakes mid-latitude streaks