National Aeronautics and Space Administration Logo
Follow this link to skip to the main content NASA Banner
Solar System Exploration
Telesto: Overview
   Back to Saturn   Overview   Gallery   Facts & Figures   News 
Black and white image showing smooth surface of Telesto.
The Cassini spacecraft passed within a cosmic stone's throw of Telesto in October 2005 capturing this shot of the tiny Trojan moon.

Telesto is known as a Tethys Trojan because, together with Calypso, it circles Saturn in the same orbit as the moon Tethys Telesto orbits about 60 degrees ahead of Tethys and Calypso orbits behind Tethys by about 60 degrees. Telesto is the leading Trojan. Calypso is the trailing Trojan.

Telesto is about 24 km (15 miles) across and appears to have a smooth, icy surface. It does not show the signs of instense cratering seen on many of Saturn's other moons.

Telesto was discovered in 1980 using ground-based observations by Brad Smith, Harold Reitsema, Stephen Larson, and John Fountain

How Telesto Got its Name:
Telesto [tah-LESS-toh] is a daughter of the Titans, Oceanus and Tethys in Greek mythology. It was originally designated S/1981 S1.

Just the Facts
Orbit Size (semi-major axis):  294,710 km
Mean Radius:  12.4 km
Volume:  7,986 km3
Mass:  4,046,404,769,362,420 kg
22 Jan 2003: 
Awards and Recognition   Solar System Exploration Roadmap   Contact Us   Site Map   Print This Page
NASA Official: Kristen Erickson
Advisory: Dr. James Green, Director of Planetary Science
Outreach Manager: Alice Wessen
Curator/Editor: Phil Davis
Science Writers: Courtney O'Connor and Bill Dunford
Producer: Greg Baerg
Webmaster: David Martin
> NASA Science Mission Directorate
> Budgets, Strategic Plans and Accountability Reports
> Equal Employment Opportunity Data
   Posted Pursuant to the No Fear Act
> Information-Dissemination Policies and Inventories
> Freedom of Information Act
> Privacy Policy & Important Notices
> Inspector General Hotline
> Office of the Inspector General
> NASA Communications Policy
> NASA Advisory Council
> Open Government at NASA
Last Updated: 12 Aug 2013