planet 128Planet Documentation. Cloud-native platform for Earth observation with reliable data, scalable analytics, and accessible integrations and APIs. Get Started Explore Data. PlatformRoss 128 b is a super Earth exoplanet that orbits a M-type star. Its mass is 1.4 Earths, it takes 9.9 days to complete one orbit of its star, and is 0.0496 AU from its star. Its discovery was announced in 2017.