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Titan Surface at 203 microns
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Titan Surface at 2.03 microns

November 17, 2009
On 26 October 2004, the Cassini spacecraft flew over Titan at less than 1200 kilometres at closest approach, acquiring several hyperspectral images with spatial resolution ranging from a few tens of kilometres to 2 kilometres per pixel.

Titan's diameter is 5151 kilometres, which is larger than Jupiter's moon Callisto (4806 km) and smaller than another Jovian moon, Ganymede (5268 km). It's mean desnity is 1881 kgm-3, a value between that of roack and that of water

The VIMS instrument took hyperspectral images from visible wavelengths to the 5.2 micron wavelength. This figure shows the mosaic obtained at the 2.03 micron wavelength; horizotnal and vertical axes show respectively the longitude and latitude in degrees. Observations are centered on the hemisphere of Titan that points away from Saturn.

Left inset high-resolution image is 30 km per pixel. It shows the site where the Huygens probe successfully landed on 14 January 2005.

The right inset shows a circular feature that scientists think is a cryovolcano, which may be responsible for replenishing Titan's methane atmosphere.


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