Discovery[1] | |
---|---|
Discovery date | December 2019 |
radial velocity and transit | |
Designations | |
K2-313 b[2] | |
Orbital characteristics[3] | |
0.04180±0.00064 AU | |
Eccentricity | 0 |
5.7459982(20) d | |
Inclination | 89.03°±0.10° |
Physical characteristics[3] | |
1.900±0.065 R🜨 | |
Mass | 4.00±0.63 M🜨 |
Mean density | 3.20+0.63 −0.58 g/cm3 |
10.8±1.8 m/s2 | |
Temperature | 440.6±7.6 K (167.5 °C; 333.4 °F, equilibrium) |
G 9-40 b is a sub-Neptune exoplanet that has an orbital period of 5.7 days. The host star is a red dwarf located 91 light-years (28 parsecs) away from Earth in the constellation Cancer.[4] The planet was discovered in 2019.[5][6] The planet's density is too low for a rocky composition, suggesting that it is either water-rich or has a significant hydrogen atmosphere.[3]
Stefansson2019
was invoked but never defined (see the help page).NASAExoplanetArchive
was invoked but never defined (see the help page).Luque2022
was invoked but never defined (see the help page).GaiaDR3
was invoked but never defined (see the help page).