Thalassa (moon)
Moon of Neptune / From Wikipedia, the free encyclopedia
Dear Wikiwand AI, let's keep it short by simply answering these key questions:
Can you list the top facts and stats about Thalassa (moon)?
Summarize this article for a 10 year old
SHOW ALL QUESTIONS
Thalassa /θəˈlæsə/, also known as Neptune IV, is the second-innermost satellite of Neptune. Thalassa was named after sea goddess Thalassa, a daughter of Aether and Hemera from Greek mythology. "Thalassa" is also the Greek word for "sea".
Quick Facts Discovery, Discovered by ...
Discovery | |
---|---|
Discovered by | Richard J. Terrile[1] and Voyager Imaging Team |
Discovery date | September 1989 |
Designations | |
Designation | Neptune IV |
Pronunciation | /θəˈlæsə/[2] |
Named after | Θάλασσα Thalassa |
Adjectives | Thalassian /θəˈlæsiən/[3] |
Orbital characteristics[4][5] | |
Epoch 18 August 1989 | |
50074.44 km | |
Eccentricity | 0.00176±0.00054 |
0.31148444±0.00000006 d | |
Inclination |
|
Satellite of | Neptune |
Physical characteristics | |
Dimensions | (108±6) × (100±12) × (52±6) km[6] |
Mean radius | 41±3 km[6] |
Mass | ~3.54×1017 kg (calculated) |
Mean density | 1.23±0.43 g/cm3[7] |
synchronous | |
zero | |
Albedo | 0.091[6][8] |
Temperature | ~51 K mean (estimate) |
23.32[8] |
Close