|
Exoplanet Name : |
BD+20 2457 b |
|
Alternate Name : |
|
|
Status : |
Confirmed |
|
Radius (Rjup / Re): |
0.9078 |
(Rjup) |
10.1759 |
(Rearth) |
|
Mass (Mjup / Me): |
21.4200 |
(Mjup) |
6810.2320 |
(Mearth) |
|
Semi Major Axis / Orbital Distance Calculated |
1.4500 |
(AU) |
1.4500 |
(AU Est.) |
|
Eccentricity : |
0.1500 |
|
Orbital Period(Yrs) |
1.0393 |
|
Orbital Period(Observed/Estimated) |
379.63 |
(Days Obs.) |
381.12 |
(Days Est.) |
|
Surface Gravity (G Earth) |
65.7687 |
|
Star Radiation at Atmospheric Boundary: |
580.3 |
(W/m2) |
|
Measured Temperature (K) |
0.0 |
(K) |
|
Blackbody T 0.1(K) |
219.1 |
(K) |
|
Blackbody T 0.3(K) |
205.7 |
(K) |
|
Blackbody T 0.7(K) |
166.4 |
(K) |
|
Tidally Locked Blackbody T 0.1(K) |
260.5 |
(K) |
|
Tidally Locked Blackbody T 0.3(K) |
244.6 |
(K) |
|
Size Class: |
Jupiter-size |
|
Mass Class: |
|
|
Detection Type : |
Radial Velocity |
|
Mass Detection : |
|
|
Radius Detection : |
|
|
Habitability by Solar Eq. Astronomical Unit: |
Habitable |
|
Habitability by Kopparapu: |
Not habitable |
|
Star Name : |
BD+20 2457 |
|
Alternate Name : |
|
|
Star Distance(LY) : |
8153.9 |
|
Stellar Radius(Rsun) : |
1.9 |
(Rsun Estimated) |
|
Stellar Mass(Msun) : |
2.8 |
(Msun Measured) |
2.8 |
(Msun Estimated) |
|
Star Age : |
0.0 |
(GY) |
|
Temperature : |
4127 |
(K) |
|
Spectral type : |
K2II |
|
UV portion[%]: |
0.8 |
|
Visible portion[%]: |
25.7 |
|
IR portion[%]: |
73.5 |
|
Metalicity : |
-1.0 |
|
Absolute Magnitude: |
-2.2 |
|
Apparent Magnitude: |
9.8 |
|
Right Ascension(RA) |
154.1869 |
|
Declination (DEC) |
19.8914 |
|
Hubble Space Telescope Guide Star Catalog (GSC) ID |
01422-00790 |
|
Discovered by |
|
|
Discovery Paper - Authors |
"Niedzielski,.; Nowak,.; Adam_w,.; Wolszczan,." |
|
Discovery Paper - Title |
Substellar-mass Companions to the K-dwarf BD+14 4559 and the K-giants HD 240210 and BD+20 2457 |
|
Discovery Paper - Journal |
0 |
|
Discovery Paper - URL |
0 |
|
SIMBAD LINK |
http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=BD%2B20+2457+&submit=SIMBAD+search |
|
Open Exoplanet Database Link |
http://www.openexoplanetcatalogue.com/planet/BD20%202457%20b/ |
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BD+20 2457 b
BD+20 2457 b
BD+20 2457 b is an exoplanet orbiting the star BD+20 2457, located about 8153.9 light-years (2500.0 pc) away from Solar System. Its discovery was publicly announced on 2009.
The host star BD+20 2457 has apparent magnitude of 9.8, with absolute magnitude of -2.2. It is 2.8 times more massive and 1.9 times bigger compared with our Sun. The surface temperature is 4127 with its spectral types of K2II
In this planetary system, the extrasolar planet BD+20 2457 b orbits around the star BD+20 2457 every 379.6 days with its orbital distance of 1.45 AU ( 216916912.5 km)
(Projected orbit of BD+20 2457 b around its host star BD+20 2457)
The Star BD+20 2457 's habitable zone is located at the following distance
Inner Boundary (the orbital distance at Venus's Equivalent Radiation )
: 0.683 AU ( 102219341.9 km)
Earth Boundary (the orbital distance at Earth's Equivalent Radiation)
: 0.944 AU ( 141293843.6 km)
Outer Boundary (the orbital distance at Mars's Equivalent Radiation)
: 1.439 AU ( 215300549.5 km)
Snow Line (the orbital distance at Snow Line Equivalent Radiation)
: 2.118 AU ( 316824190.2 km)
Radiation at Planetary Boundary of BD+20 2457 b : 580.25 W/m2
(Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star BD+20 2457)
Kopparapu Recent Venus for Star BD+20 2457 distance : 0.763 AU
Kopparapu Runaway Greenhouse for Earth-sized planet for Star BD+20 2457 distance : 0.966 AU
Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star BD+20 2457 distance : 0.933 AU
Kopparapu Runaway Greenhouse for Mars-sized planet for Star BD+20 2457 distance : 1.025 AU
Kopparapu Outer Boundary for Maximum Greenhouse for Star BD+20 2457 distance : 1.822 AU
Kopparapu Outer Boundary for Early Mars for Star BD+20 2457 distance : 1.922 AU
(Habitable zone calculated based on Kopparapu et al.(2013) around the star BD+20 2457)
Original Kopparapu Recent Venus for Star BD+20 2457 distance : 0.753 AU
Original Kopparapu Runaway Greenhouse for Star BD+20 2457 distance : 0.999 AU
Original Kopparapu Moist Greenhouse for Star BD+20 2457 distance : 0.997 AU
Original Kopparapu Outer Boundary for Maximum Greenhouse for Star BD+20 2457 distance : 1.851 AU
Original Kopparapu Outer Boundary for Early Mars for Star BD+20 2457 distance : 1.925 AU
(Habitable zone calculated based on Kopparapu et al.(Original) around the star BD+20 2457)
(Position in Stellar Map of star BD+20 2457 and its Exoplanet BD+20 2457 b)
(Zoomed position in Stellar Map of star BD+20 2457 and its Exoplanet BD+20 2457 b (zoom level 3))
(Synthetic Spectrum of star BD+20 2457*)
*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
