Planet GJ 758 b

Name GJ 758 b
Planet Status Confirmed
Discovered in 2009
Mass 45.0 ( -5.0 +5.0 ) MJ
Mass*sin(i)
Semi-Major Axis 44.8 ( -14.1 +44.4 ) AU
Orbital Period 109000.0 ( -62000.0 +198000.0 ) day
Eccentricity 0.564 (± 0.148)
ω
Tperi
Radius
Inclination 43.6 ( -17.4 +13.1 ) deg
Update 2017-03-06
Detection Method Imaging
Mass Detection Method Spectrum
Radius Detection Method
Primary transit
Secondary transit
λ
Impact Parameter b
Time Vr=0
Velocity Semiamplitude K
Calculated temperature
Measured temperature 741.0 K +
Hottest point longitude
Geometric albedo
Surface gravity log(g/gH) 5.0
Alternate Names

Star

GJ 758
Name GJ 758
Distance 15.5 pc
Spectral type K0V
Apparent magnitude V 6.36
Mass 0.97 MSun
Age 8.2 (± 0.5) Gyr
Effective temperature 5425.0 K
Radius 0.88 RSun
Metallicity [Fe/H] 0.18 (± 0.04)
Detected Disc
Magnetic Field
RA2000 19:23:34.0
Dec2000 +33:13:19
Alternate Names Gliese 758, HR 7368, HD 182488
Planetary system 1 planet

More data

Atmospheric parameters

Temperatures

Data Source Type Result Value Result Figure Notes Reference

Molecules

Molecule Data Source Type Result Value Result Figure Notes Reference
CH4 Measurements Detected None 2011 - JANSON M.

Observability Predictor

Remarks

(Janson et al. 2011): the candidate for a second companion suggested by Thalmann et al. (2009) is ruled out as a background star.


Related publications

Orbit and Dynamical Mass of the Late-T Dwarf Gl 758 B
2018 BOWLER B., DUPUY T., ENDL M., COCHRAN W., MACQUEEN Ph. et al.
Astron. J., accepted
arxiv  

Project 1640 Observations of Brown Dwarf GJ 758 B
2017 NILSSON R., VEICHT A., GIORLA GODFREY P., RICE E., AGUILAR J. et al.
ApJ, 838, 64
paper  arxiv  ADS

A new statistical method for characterizing the atmospheres of extrasolar planets
2017 HENDERSON C., SKEMER A., MORLEY C. & FORTNEY J.
MNRAS, 470, 4557
paper  arxiv  

Imaging Extrasolar Giant Planets
2016 BOWLER B.
PASP, 128, 102001
paper  arxiv  ADS  

First light of the VLT planet finder SPHERE. I. Detection and characterization of the sub-stellar companion GJ 758 B
2016 VIGAN A., BONNEFOY M., GINSKI C., BEUST H., GALICHER R. et al.
Astron. & Astrophys., 587, A55
paper  arxiv  ADS  

A Statistical Analysis of SEEDS and Other High-contrast Exoplanet Surveys: Massive Planets or Low-mass Brown Dwarfs?
2014 BRANDT T., McELWAIN M., TURNER E., MEDE K., SPIEGEL D. & 48 co-authors
ApJ, 794, 159
paper  arxiv   ADS  

Near-infrared Multi-band Photometry of the Substellar Companion GJ 758 B
2011 JANSON M., CARSON J., THALMANN C., MCELWAIN M.W., GOTO M. & 44 co-authors
ApJ, 728, 85
paper   arxiv   ADS  

High-Contrast 3.8 Micron Imaging Of The Brown Dwarf/Planet-Mass Companion to GJ 758
2010 CURRIE T., BAILEY V., FABRYCKY D., MURRAY-CLAY R., RODIGAS T. & HINZ P.
ApJ. Letters, 721, L177
paper   arxiv   ADS  

Discovery of the Coldest Imaged Companion of a Sun-Like Star
2009 THALMANN C., CARSON J., JANSON M., GOTO M., McELWAIN M. & 15 co-authors
ApJ. Letters, 707, L123
paper   arxiv   ADS  

Improved Age Estimation for Solar-Type Dwarfs Using Activity-Rotation Diagnostics
2008 MAMAJEK E. & HILLENBRAND L.
ApJ, 687, 1264
paper   arxiv   ADS