Planet GJ 143 b

Name GJ 143 b
Planet Status Confirmed
Discovered in 2018
Mass 0.0714 ( -0.006 +0.0069 ) MJ
Mass*sin(i)
Semi-Major Axis 0.1932 (± 0.0002) AU
Orbital Period 35.61253 ( -0.00062 +0.0006 ) day
Eccentricity 0.188 ( -0.078 +0.076 )
ω 98.0 ( -17.0 +21.0 ) deg
Tperi
Radius 0.2329 ( -0.0143 +0.0152 ) RJ
Inclination 89.33 ( -0.11 +0.15 ) deg
Update 2019-05-02
Detection Method Primary Transit
Mass Detection Method Radial Velocity
Radius Detection Method Primary Transit
Primary transit 2458385.92502 ( -0.00055 +0.00054 ) JD
Secondary transit
λ
Impact Parameter b 0.587 ( -0.15 +0.097 )
Time Vr=0
Velocity Semiamplitude K 5.51 ( -0.33 +0.41 ) m/s
Calculated temperature
Measured temperature
Hottest point longitude
Geometric albedo
Surface gravity log(g/gH)
Alternate Names HD 21749 b

Star

GJ 143
Name GJ 143
Distance 16.33 (± 0.03) pc +
Spectral type K4.5V
Apparent magnitude V 8.3
Mass 0.76 (± 0.007) MSun
Age 3.8 (± 3.7) Gyr
Effective temperature 4640.0 (± 100.0) K
Radius 0.73 (± 0.01) RSun
Metallicity [Fe/H] 0.003 (± 0.06)
Detected Disc
Magnetic Field
RA2000 03:26:59.0
Dec2000 -63:29:57
Alternate Names HD 21749, TOI-186
Planetary system
2 planets

More data

Observability Predictor

Remarks

12 Dec 2018: : The orbital period comes from RV measurements since there is only one transit (Trifonov et al. 2018)

Related publications

Revisiting the HD 21749 Planetary System with Stellar Activity Modeling
2020 GAN T., WANG Sh., TESKE J., MAO Sh., HOWARD W. et al.
MNRAS, in press
paper   arxiv

TESS Delivers Its First Earth-sized Planet and a Warm Sub-Neptune
2019 DRAGOMIR D., TESKE J., GUNTHER M., SEGRANSAN D., BURT J. et al.
ApJ. Letters, 875, L7
paper  arxiv  

TESS exoplanet candidates validated with HARPS archival data. A massive Neptune around GJ 143 and two Neptunes around HD 23472
2018 TRIFONOV T., RYBIZKI J. & KÜRSTER M.
Astron. & Astrophys., 622, L7
paper  arxiv