Image: Wikimedia Commons

Tethys

Moon of Saturn

Also known as Saturn III

Orbits: Saturn
Mass: 617.39 zettagram
1
Sources
1.ssd.jpl.nasa.gov/?sat_phys_parRetrieved 2020-09-05
View statement on Wikidata ↗
Radius: 531.1 km
1
Sources
1.Stated in NASA FACTSssd.jpl.nasa.gov/?sat_phys_par
View statement on Wikidata ↗
Orbital period: 1.8878 days
1
Sources
1.Stated in NASA FACTSssd.jpl.nasa.gov/?sat_phys_par
View statement on Wikidata ↗
Semi-major axis: 294,619 km
Discovered by: Giovanni Domenico Cassini
1
Sources
1.Stated in A Short History of Astronomy
View statement on Wikidata ↗
Discovered: March 21, 1684
, 1684
1
Sources
1.Stated in A Short History of Astronomy
View statement on Wikidata ↗

Overview

From Wikipedia, the free encyclopedia · Read full article · Text CC BY-SA 4.0

Tethys is the fifth-largest moon of Saturn, measuring about 1,060 km (660 mi) across. It was discovered by Giovanni Domenico Cassini in 1684, and is named after the titan Tethys of Greek mythology.

Overview

All data

35 statements · 31% with external sources · numbers in brackets are citations

Named after: Tethys
Apparent magnitude: 10.2 astronomical filter: V band
Eccentricity: 0.0001
Inclination: 1.12 degree
Albedo: 0.2
1
Sources
1.Stated in NASA FACTSssd.jpl.nasa.gov/?sat_phys_par
View statement on Wikidata ↗
Temperature: 86 K sourcing circumstances: mean
Surface gravity: 0.146 metre per square second

On other databases

18 identifiers linking Tethys across the web's reference databases

Data quality

statements

31%

externally sourced

Source last edited September 26, 2026. AIDB refreshes this page daily.

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AIDB. (2026). Tethys (Q15047). Retrieved from https://aidb.si/e/tethys-Q15047