Planet GJ 9827 b

Name GJ 9827 b
Planet Status Confirmed
Discovered in 2017
Mass 0.0258 (± 0.00481) MJ +
Mass*sin(i)
Semi-Major Axis 0.0211 (± 0.002) AU +
Orbital Period 1.2089819 (± 1.3e-05) JD +
Eccentricity 0.0
ω
Tperi
Radius 0.146 (± 0.0016) RJ +
Inclination 85.8 (± 1.0) deg
Update 2017-11-07
Detection Method Primary Transit
Mass Detection Method Radial Velocity
Radius Detection Method Primary Transit
Molecules
Primary transit 2457738.82671 (± 0.00047) JD
Secondary transit
λ
Impact Parameter b 0.57 (± 0.013)
Time Vr=0
Velocity Semiamplitude K 6.44 (± 1.2) m/s
Calculated temperature 1043.5 (± 36.0) K
Measured temperature
Hottest point longitude
Geometric albedo
Surface gravity log(g/gH)
Alternate Names

Star

GJ 9827
Name GJ 9827
Distance 30.3 (± 1.6) pc
Spectral type K6V
Apparent magnitude V 10.4
Mass 0.659 (± 0.06) MSun
Age
Effective temperature 4255.0 (± 110.0) K
Radius 0.651 (± 0.065) RSun
Metallicity [Fe/H] -0.28 (± 0.12)
Detected Disc
Magnetic Field
RA2000 23:28:25.0
Dec2000 -01:17:11
Alternate Names
Planetary system
3 planets

More data


Related publications

Three Small Super-Earths Transiting the nearby star GJ 9827
2017 NIRAULA P., REDFIELD S., DAI F., BARRAGAN O., GANDOLFI D. et al.
ApJ, submitted
arxiv  

A System of Three Super Earths Transiting the Late K-Dwarf GJ 9827 at Thirty Parsecs
2017 RODRIGUEZ J., VANDERBURG A., EASTMAN J., CROSSFIELD I., CIARDI D. et al.
ApJ, submitted
arxiv  

Magellan II/PFS Radial Velocity Mass Measurements of the Super-Earth Planets Transiting GJ 9827 at 30 Parsecs
2017 TESKE J., WANG Sh., WOLFGANG A., SHECTMAN S., BUTLER P. et al.
Astron. J., submitted
arxiv