Planet GJ 887 c

Name GJ 887 c
Planet Status Confirmed
Discovered in 2020
Mass
Mass*sin(i) 0.0239 (± 0.0038) MJ
Semi-Major Axis 0.12 (± 0.004) AU
Orbital Period 21.789 (± 0.005) day
Eccentricity
ω
Tperi
Radius
Inclination
Update 2020-06-27
Detection Method Radial Velocity
Mass Detection Method Radial Velocity
Radius Detection Method
Primary transit
Secondary transit
λ
Impact Parameter b
Time Vr=0
Velocity Semiamplitude K 2.8 (± 0.4) m/s
Calculated temperature 352.0 K
Measured temperature
Hottest point longitude
Geometric albedo
Surface gravity log(g/gH)
Alternate Names

Star

GJ 887
Name GJ 887
Distance 3.2871 (± 0.0005) pc
Spectral type M1V
Apparent magnitude V 7.34
Mass 0.489 (± 0.05) MSun
Age
Effective temperature 3688.0 (± 86.0) K
Radius 0.4712 (± 0.086) RSun
Metallicity [Fe/H] -0.06 (± 0.08)
Detected Disc
Magnetic Field
RA2000 23:05:52.0
Dec2000 -35:51:11
Alternate Names HD 217987
Planetary system
2 planets

More data


Related publications

A multiplanet system of super-Earths orbiting the brightest red dwarf star GJ 887
2020 JEFFERS S., DREIZLER S., BARNES J., HASWELL C., NELSON R. et al.
Science, 368, 1477
paper   arxiv  

When "Boring" Stars Flare: The Ultraviolet Activity of GJ 887, a Bright M Star Hosting Newly Discovered Planets
2020 PARKE LOYD R., SHKOLNIK E., FRANCE K., WOOD B. & YOUNGBLOOD A.
Res. Notes AAS, 4, 119
paper