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Titan in context (1)

Titan in context (1). Hubble Space Telescope, 6 August 1995. Titan. Taken by Voyager 2 in 1981. A regular, large, satellite orbiting 20 Rs from Saturn. Titan's atmosphere. P Titan orbit = 15.9 days P Saturn orbit = 29.4 years Tilt = obliquity = 27 °

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Titan in context (1)

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  1. Titan in context (1) Hubble Space Telescope, 6 August 1995

  2. Titan Taken by Voyager 2 in 1981 A regular, large, satellite orbiting 20 Rs from Saturn

  3. Titan's atmosphere • PTitan orbit = 15.9 days • PSaturn orbit = 29.4 years • Tilt = obliquity = 27° • Bulk density = 1.88 g cm-3, similar to Callisto • and Ganymede (~50% ice, ~50% rock) • Atmospheric Composition: • N2 0.77 – 0.92 • Ar 0.05 – 0.17 • CH4 0.03 – 0.07 • other hydrocarbons and nitriles • Haze produce by photo-dissociation of CH4 • Tsurface = 94 K, Psurface = 1.5 bar. • Tropopause at 42 km, T = 71 K • Scale height in troposphere = 20 km • May have strong super-rotating winds.

  4. Imaging Titan's lower atmosphere & surface Hubble Space Telescope 17 Oct. 1994 Keck 1 / NIRC speckle 23 Oct. 1997 Keck 2 / NIRSPAO 3 Dec. 2001 850LP filter CML = 75º W K’ filter (1.95-2.29 μm) CML = 76º W K’ filter CML = 67º W Keck 2 / NIRC2 24 Dec. 2003 K’ filter CML = 69º W

  5. Variability of south polar clouds Keck 2 AO / NIRC2 21 Dec. 2001 H2 (2.11-2.14 μm) Roe et al. 2002 9:40 UT 12:15 UT 25 Dec. 2003 K’ (1.95 – 2.30 μm) H2 (2.11-2.14 μm)

  6. Titan photochemistry

  7. ESA

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