GJ 357 d · Asteria Star

Scientific overview

GJ 357 d is a super-earth orbiting GJ 357, completing an orbit every 56 days, about 31 light-years from Earth. It was discovered in 2019 using the radial velocity method.

Host star

GJ 357

Spectral type

M2.5 V

Temperature

3,505 K

Mass

0.342 M☉

Planetary system — GJ 357 system

View the GJ 357 system (3 known planets).

Planet	Class	Radius (R⊕)	Period (d)	Distance (ly)
GJ 357 bTransit · 2019	Terrestrial planet	1.2	3.9306	31
GJ 357 cRadial Velocity · 2019	Super-Earth	1.66	9.1247	31
GJ 357 dRadial Velocity · 2019	Super-Earth	2.34	55.661	31

Discovery and detection

Detection method

Radial Velocity Method

Discovery year

2019

Habitability notes

GJ 357 d lies in the habitable zone of its star, the range of orbits where liquid water could in principle exist on a planet's surface. This makes it a candidate of interest for habitability studies — but lying in the habitable zone is not evidence that the planet is habitable or inhabited; its atmosphere and surface conditions remain unknown.

Knowledge connections

OrbitsGJ 357
Member of systemGJ 357 system
Discovered by methodRadial Velocity Method
Catalogued inNASA Exoplanet Archive
Habitable-zone candidateHabitable zone

Loading…