description GJ 357 d Overview
GJ 357 d is a confirmed, non-transiting super-Earth orbiting the M-dwarf GJ 357. Its minimum mass is about 6.1 Earth masses, and its orbital period is approximately 56 days, placing it near the outer part of the system. The planet receives much less stellar energy than Earth and has been described as potentially within the host star’s habitable zone, although that interpretation depends on its atmosphere and does not establish the presence of surface liquid water.
help GJ 357 d FAQ
Is GJ 357 d in the habitable zone?
GJ 357 d orbits near the outer part of the system and receives much less stellar energy than Earth. It is often discussed as a potentially temperate world, but habitability depends on its atmosphere and surface conditions, which are not directly known.
Does GJ 357 d transit its star?
No, GJ 357 d is a confirmed non-transiting super-Earth. Its minimum mass is about 6.1 Earth masses, measured from the gravitational pull it exerts on its host star.
How long is a year on GJ 357 d?
Its orbital period is approximately 56 days. The planet circles the M-dwarf GJ 357, so its year is short compared with Earth's even though it lies near the system's outer region.
How was GJ 357 d discovered?
It was detected through radial-velocity measurements, which track the small motion of a star caused by an orbiting planet. The same system also contains the transiting planet GJ 357 b.
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