Planet MASACARA-2 b/KELT-20 b

Name MASACARA-2 b/KELT-20 b
Planet Status Confirmed
Discovered in 2017
Mass 3.518 ( -3.517 +0.0 ) MJ
Mass*sin(i)
Semi-Major Axis 0.0542 ( -0.0021 +0.0014 ) AU +
Orbital Period 1.4741085 (± 1.9e-06) day +
Eccentricity
ω
Tperi
Radius 1.83 (± 0.07) RJ
Inclination 86.2 (± 0.1) deg
Update 2019-05-30
Detection Method Primary Transit
Mass Detection Method Radial Velocity
Radius Detection Method Primary Transit
Primary transit
Secondary transit
λ 3.4 (± 2.1) deg
Impact Parameter b
Time Vr=0
Velocity Semiamplitude K
Calculated temperature 2230.0 ( -70.0 +60.0 ) K
Measured temperature
Hottest point longitude
Geometric albedo
Surface gravity log(g/gH)
Alternate Names HD 185603 b, MASCARA-2 b

Star

KELT-20
Name KELT-20
Distance
Spectral type A2V
Apparent magnitude V 7.58
Mass 2.0 ( -0.1 +0.2 ) MSun
Age 0.3 ( -0.1 +0.2 ) Gyr
Effective temperature 8981.0 (± 115.0) K
Radius 1.561 ( -0.064 +0.058 ) RSun
Metallicity [Fe/H] -0.29 ( -0.36 +0.22 )
Detected Disc
Magnetic Field
RA2000 19:38:38.7
Dec2000 +31:13:09
Alternate Names 2MASS J19383872+3113091, SAO 68614
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
Ca Measurements Detected None 2019 - CASASAYAS-BARRIS N.
Fe+ Measurements Detected None 2019 - CASASAYAS-BARRIS N.
H Measurements Detected None 2019 - CASASAYAS-BARRIS N.
Na Measurements Detected None 2019 - CASASAYAS-BARRIS N.

Observability Predictor

Remarks

5-7-2017 : This object is simultaneously annouced as MASCARA-2 b by Talens et al. and as KELT-20 b by Lund et al.

Related publications

Atmospheric characterization of the ultra-hot Jupiter MASCARA-2b/KELT-20b
2019 CASASAYAS-BARRIS N., PALLE E., YAN F., CHEN G. et al.
Astron. & Astrophys., 628, A9
paper  arxiv  

The DEdicated MONitor of EXotransits and Transients (DEMONEXT): System Overview and Year One Results from a Low-Cost Robotic Telescope for Follow-Up of Exoplanetary Transits and Transients
2018 VILLANUEVA S., GAUDI S., POGGE R., EASTMAN J., STASSUN K. te al.
PASP, 130, 015001
paper  arxiv  

KELT: The Kilodegree Extremely Little Telescope, a Survey for Exoplanets Transiting Bright, Hot Stars
2018 PEPPER J., STASSUN K. & GAUDI S.
in the 'Handbook of Exoplanets,' Springer
arxiv  

Na I and Hα absorption features in the atmosphere of MASCARA-2b/KELT-20b
2018 CASASAYAS-BARRIS N., PALLE E., YAN F., CHEN G. et al.
Astron. & Astrophys., in press
paper  arxiv  

MASCARA-2 b: A hot Jupiter transiting a $m_V=7.6$ A-star
2018 TALENS G., JUSTENSEN A., ALBRECHT S., McCORMAC J., VAN EYLEN V. et al.
Astron. & Astrophys., 612, A57
paper  

KELT-20b: A giant planet with a period of P~ 3.5 days transiting the V~ 7.6 early A star HD 185603
2017 LUND M., RODRIGUEZ J., ZHOU G., SCOTT GAUDI B., STASSUN K. et al.
Astron. J., 154, 194
paper  arxiv