Thalassa
Neptune 804 Thalassa
📋 A written introduction is coming — for now this page shows official values only.
Physical data
- Mean radius
- 40 km
- GM
- 0.02359 km³/s²
- Density
- 1.3184 g/cm³
Source:NASA JPL Solar System Dynamics · checked 2026-11-02 ↗
Orbit
- Semi-major axis
- 50,100 km
- Eccentricity
- 0.001
- Inclination
- 0.2°
- Orbital period
- 0.3118 days
- Retrograde
- No
Source:NASA JPL Solar System Dynamics · checked 2026-11-02 ↗
Related
Parent body
In everyday life
- About 80 km across — 20% of the 400 km Seoul–Busan expressway.
- One orbit takes about 7.5 hours — more than 3.2 orbits a day.
- About 50,100 km from Neptune on average — 125 drives along the 400 km Seoul–Busan expressway.