Thalassa
E118792
Thalassa is a small, inner irregularly shaped moon of Neptune that orbits close to the planet within its ring system.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Thalassa canonical | 3 |
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
irregularly shaped moon
ⓘ
moon of Neptune ⓘ natural satellite ⓘ |
| adjectiveForm | Thalassan ⓘ |
| albedo | low ⓘ |
| belongsToGroup | inner moons of Neptune ⓘ |
| celestialBodyType | inner moon ⓘ |
| diameter_km | ~80 ⓘ |
| discoveredBy |
Richard J. Terrile
ⓘ
Voyager imaging team ⓘ
surface form:
Voyager 2 imaging team
|
| discoveredBySpacecraft | Voyager 2 ⓘ |
| discoveryContext |
Voyager 2
ⓘ
surface form:
Voyager 2 Neptune flyby
|
| discoveryDate | 1989-09-18 ⓘ |
| discoveryMethod | spacecraft imaging ⓘ |
| equilibriumState | non-spherical ⓘ |
| escapeVelocity_m_per_s | ~40 ⓘ |
| exploredBy | Voyager 2 ⓘ |
| gravitationalBinding | bound to Neptune ⓘ |
| IAUNameStatus | approved ⓘ |
| locatedIn |
Neptune system
ⓘ
surface form:
Neptunian system
|
| mass_estimate | very low (exact value uncertain) ⓘ |
| meanDensity_g_per_cm3 | ~1.2 (approximate) ⓘ |
| meanRadius_km | ~40 ⓘ |
| namedAfter |
Greek mythological figure
ⓘ
Thalassa ⓘ
surface form:
Thalassa (sea nymph in Greek mythology)
|
| namedBy | International Astronomical Union ⓘ |
| neighboringMoon |
Despina
ⓘ
Naiad ⓘ |
| orbitalDirection | prograde ⓘ |
| orbitalEccentricity | ~0.0002 ⓘ |
| orbitalInclination_deg | ~0.21 ⓘ |
| orbitalPeriod_days | ~0.311 ⓘ |
| orbits | Neptune ⓘ |
| orbitsWithin | Neptune ring system ⓘ |
| parentPlanet | Neptune ⓘ |
| provisionalDesignation | S/1989 N5 ⓘ |
| relativePosition |
orbits inside Despina
ⓘ
orbits outside Naiad ⓘ |
| ringAssociation | orbits near the inner Neptunian rings ⓘ |
| rotation | synchronous with Neptune ⓘ |
| rotationState | tidally locked to Neptune ⓘ |
| semiMajorAxis_km | ~50,074 ⓘ |
| shape | irregular ⓘ |
| surfaceComposition | likely water ice with dark material ⓘ |
| surfaceFeatures | no prominent large craters resolved ⓘ |
| system |
Neptune system
ⓘ
surface form:
Neptune satellite system
|
| visibilityFromEarth | telescopic only ⓘ |
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.