GJ 1132 b

GJ 1132 b (Gliese 1132 b) is an extra-solar planet orbiting M-type star GJ 1132 (Gliese 1132), ~13 parsecs from Earth, and somewhat close to Earth-size (an exo-Earth), i.e., 1.7 Earth-masses and 1.1 Earth radii. It is a transiting planet discovered by the MEarth Project in 2015. It has been of interest for being sufficiently close to observe, and though not in the habitable zone, it was initially thought to be cool enough (plausibly as low as 409 K) to retain an atmosphere, which could be investigated using transmission spectroscopy. However, further study reveals it to be warmer and unlikely to have much of an atmosphere. GJ 1132 b characteristics:

• Host star: GJ 1132 (Gliese 1132).
• Discovery: by the transit method in 2015.
• 13 pc - distance.
• 0.0157 AU - orbital radius.
• 1.6 days - orbital period.
• 1.1 - radius in Earth radii.
• 1.7 - Earth masses.
• 591 K - equilibrium temperature.