The Hubble Space Telescope observed Gliese 436 for a few transits, and we now have revised parameters.
m/sin i | 0.072 MJ |
Semi-major axis | 0.02872 AU |
Orbital Period | 2.643904 days |
Eccentricity | 0.15 |
Omega | 351 deg |
Radius | 0.438 RJ |
Inclination | 85.8 deg |
So, Gliese 436 b is a bit bigger than Neptune. Could the extra size come from tidal heating? Interactions with a second planet in the system?
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