|
Exoplanet Name : |
KELT-20 b |
|
Alternate Name : |
"HD 185603 b, MASCARA-2 b, KELT-20 b/MASCARA-2 b" |
|
Status : |
Confirmed |
|
Radius (Rjup / Re): |
1.8300 |
(Rjup) |
20.5125 |
(Rearth) |
|
Mass (Mjup / Me): |
3.5180 |
(Mjup) |
1118.5059 |
(Mearth) |
|
Semi Major Axis / Orbital Distance Calculated |
0.0542 |
(AU) |
0.0542 |
(AU Est.) |
|
Eccentricity : |
0.0000 |
|
Orbital Period(Yrs) |
0.0095 |
|
Orbital Period(Observed/Estimated) |
3.47 |
(Days Obs.) |
3.35 |
(Days Est.) |
|
Surface Gravity (G Earth) |
2.6583 |
|
Star Radiation at Atmospheric Boundary: |
6949467.8 |
(W/m2) |
|
Measured Temperature (K) |
0.0 |
(K) |
|
Blackbody T 0.1(K) |
2291.6 |
(K) |
|
Blackbody T 0.3(K) |
2152.0 |
(K) |
|
Blackbody T 0.7(K) |
1741.2 |
(K) |
|
Tidally Locked Blackbody T 0.1(K) |
2725.1 |
(K) |
|
Tidally Locked Blackbody T 0.3(K) |
2559.2 |
(K) |
|
Size Class: |
Super-Jupiter-size |
|
Mass Class: |
|
|
Detection Type : |
Primary Transit |
|
Mass Detection : |
Radial Velocity |
|
Radius Detection : |
Primary Transit |
|
Habitability by Solar Eq. Astronomical Unit: |
Not habitable |
|
Habitability by Kopparapu: |
Not habitable |
|
Star Name : |
MASCARA-2 |
|
Alternate Name : |
HD 185603 |
|
Star Distance(LY) : |
456.8 |
|
Stellar Radius(Rsun) : |
1.6 |
(Rsun Measured) |
|
Stellar Mass(Msun) : |
1.9 |
(Msun Measured) |
1.8 |
(Msun Estimated) |
|
Star Age : |
0.2 |
(GY) |
|
Temperature : |
8980 |
(K) |
|
Spectral type : |
A2 |
|
UV portion[%]: |
0.3 |
|
Visible portion[%]: |
1.5 |
|
IR portion[%]: |
98.2 |
|
Metalicity : |
-0.0 |
|
Absolute Magnitude: |
-2.7 |
|
Apparent Magnitude: |
3.0 |
|
Right Ascension(RA) |
294.6625 |
|
Declination (DEC) |
31.2192 |
|
Hubble Space Telescope Guide Star Catalog (GSC) ID |
02393-00852 |
|
Discovered by |
|
|
Discovery Paper - Authors |
"Allyson Bieryla, Karen Collins, Thomas G. Beatty, Jason Eastman, Robert J. Siverd, Joshua Pepper, B. Scott Gaudi, Keivan G. Stassun, Caleb Canas, David W. Latham et al." |
|
Discovery Paper - Title |
KELT-7b: A hot Jupiter transiting a bright V=8.54 rapidly rotating F-star |
|
Discovery Paper - Journal |
0 |
|
Discovery Paper - URL |
0 |
|
SIMBAD LINK |
http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=KELT-7+&submit=SIMBAD+search |
|
Open Exoplanet Database Link |
http://www.openexoplanetcatalogue.com/planet/KELT-7%20b/ |
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KELT-20 b
KELT-20 b
KELT-20 b is an exoplanet orbiting the star MASCARA-2, located about 456.8 light-years (140.1 pc) away from Solar System. Its discovery was publicly announced on 2017.
The host star MASCARA-2 has apparent magnitude of 3.0, with absolute magnitude of -2.7. It is 1.9 times more massive and 1.6 times bigger compared with our Sun. The surface temperature is 8980 with its spectral types of A2
In this planetary system, the extrasolar planet KELT-20 b orbits around the star MASCARA-2 every 3.5 days with its orbital distance of 0.05 AU ( 8108204.6 km)
(Projected orbit of KELT-20 b around its host star MASCARA-2)
The Star MASCARA-2 's habitable zone is located at the following distance
Inner Boundary (the orbital distance at Venus's Equivalent Radiation )
: 2.795 AU ( 418148716.9 km)
Earth Boundary (the orbital distance at Earth's Equivalent Radiation)
: 3.864 AU ( 577990802.0 km)
Outer Boundary (the orbital distance at Mars's Equivalent Radiation)
: 5.887 AU ( 880730073.2 km)
Snow Line (the orbital distance at Snow Line Equivalent Radiation)
: 8.663 AU ( 1296032885.1 km)
Radiation at Planetary Boundary of KELT-20 b : 6949467.84 W/m2
(Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star MASCARA-2)
Kopparapu Recent Venus for Star MASCARA-2 distance : 2.758 AU
Kopparapu Runaway Greenhouse for Earth-sized planet for Star MASCARA-2 distance : 3.495 AU
Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star MASCARA-2 distance : 3.376 AU
Kopparapu Runaway Greenhouse for Mars-sized planet for Star MASCARA-2 distance : 3.688 AU
Kopparapu Outer Boundary for Maximum Greenhouse for Star MASCARA-2 distance : 6.054 AU
Kopparapu Outer Boundary for Early Mars for Star MASCARA-2 distance : 6.382 AU
(Habitable zone calculated based on Kopparapu et al.(2013) around the star MASCARA-2)
Original Kopparapu Recent Venus for Star MASCARA-2 distance : 2.808 AU
Original Kopparapu Runaway Greenhouse for Star MASCARA-2 distance : 3.555 AU
Original Kopparapu Moist Greenhouse for Star MASCARA-2 distance : 3.716 AU
Original Kopparapu Outer Boundary for Maximum Greenhouse for Star MASCARA-2 distance : 6.146 AU
Original Kopparapu Outer Boundary for Early Mars for Star MASCARA-2 distance : 6.392 AU
(Habitable zone calculated based on Kopparapu et al.(Original) around the star MASCARA-2)
(Position in Stellar Map of star MASCARA-2 and its Exoplanet KELT-20 b)
(Zoomed position in Stellar Map of star MASCARA-2 and its Exoplanet KELT-20 b (zoom level 3))
(Synthetic Spectrum of star MASCARA-2*)
*Yamashiki YA et al. 2019 ApJ 881 114
MUSCLES Paper I - France et al. 2016 ApJ 820 89
MUSCLES Paper II- Youngblood et al. 2016 ApJ 824 101
MUSCLES Paper III- Loyd et al. 2016 ApJ 824 102
