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
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

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