Annotated Version
This global digital map of Titan was created using data taken by the
Cassini spacecraft Imaging Science Subsystem (ISS).
The data here consist of images taken using a filter centered at 938
nanometers, allowing researchers to examine albedo (or inherent
brightness) variations across the surface of Titan. Due to the scattering
of light by Titan's dense atmosphere, no topographic shading is visible in
these images.
The map is an equidistant projection and has a scale of 2 kilometers (1.25
miles) per pixel. Equidistant projections preserve distances on a body,
with some distortion of area and direction. Actual resolution varies
greatly across the map, with the best coverage (close to the map scale)
near the center and edges of the map and the worst coverage on the
trailing hemisphere (centered around 270 degrees west longitude).
Coverage should improve in some of the poorly covered areas starting in
February 2007, when northern Belet, Adiri, and Dilmun will be imaged.
Imaging coverage in the northern polar region, currently blank on this
map, will improve over the next few years, as Titan approaches vernal
equinox in August 2009.
The mean radius of Titan used for projection of this map is 2,575
kilometers (1,600 miles). Until a control network is created for Titan,
the satellite is assumed to be spherical.
The named features are designated by the International Astronomical Union.
(A "facula" on Titan is a bright spot; a "macula" is a dark spot.)
This map demonstrates how our knowledge of Titan's surface has been vastly
improved since Cassini arrived and began mapping the outsize moon. See
PIA06086 for an earlier Cassini map of Titan.
The Cassini-Huygens mission is a cooperative project of NASA, the European
Space Agency and the Italian Space Agency. The Jet Propulsion Laboratory,
a division of the California Institute of Technology in Pasadena, manages
the mission for NASA's Science Mission Directorate, Washington, D.C. The
Cassini orbiter and its two onboard cameras were designed, developed and
assembled at JPL. The imaging operations center is based at the Space
Science Institute in Boulder, Colo.
For more information about the Cassini-Huygens mission visit
http://saturn.jpl.nasa.gov/home/index.cfm. The Cassini imaging team
homepage is at http://ciclops.org.
