GJ 581 b
GJ 581 b is a Neptune-like exoplanet that orbits an M-type star. Its mass is 15.8 Earths, it takes 5.4 days to complete one orbit of its star, and is 0.04061 AU from its star. Its discovery was announced in 2005.
Planet Radius:
0.427 x Jupiter (estimate)
Planet Type:
- Neptune-like
Discovery Method:
- Radial Velocity
Planet Mass:
20.5 Earths
Discovery Date:
2005
Orbital Radius:
0.0399 AU
Orbital Period:
5.4 days
Eccentricity:
0.03
