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Exoplanet Name : |
BD+20 1790 b |
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Alternate Name : |
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Status : |
Retracted |
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Radius (Rjup / Re): |
0.9078 |
(Rjup) |
10.1759 |
(Rearth) |
|
Mass (Mjup / Me): |
6.3700 |
(Mjup) |
2025.2651 |
(Mearth) |
|
Semi Major Axis / Orbital Distance Calculated |
0.0660 |
(AU) |
0.0660 |
(AU Est.) |
|
Eccentricity : |
0.2200 |
|
Orbital Period(Yrs) |
0.0213 |
|
Orbital Period(Observed/Estimated) |
7.78 |
(Days Obs.) |
7.80 |
(Days Est.) |
|
Surface Gravity (G Earth) |
19.5587 |
|
Star Radiation at Atmospheric Boundary: |
53677.0 |
(W/m2) |
|
Measured Temperature (K) |
0.0 |
(K) |
|
Blackbody T 0.1(K) |
679.3 |
(K) |
|
Blackbody T 0.3(K) |
638.0 |
(K) |
|
Blackbody T 0.7(K) |
516.2 |
(K) |
|
Tidally Locked Blackbody T 0.1(K) |
807.9 |
(K) |
|
Tidally Locked Blackbody T 0.3(K) |
758.7 |
(K) |
|
Size Class: |
Jupiter-size |
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Mass Class: |
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|
Detection Type : |
Other |
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Mass Detection : |
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|
Radius Detection : |
|
|
Habitability by Solar Eq. Astronomical Unit: |
Not habitable |
|
Habitability by Kopparapu: |
Not habitable |
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Star Name : |
BD+20 1790 |
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Alternate Name : |
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|
Star Distance(LY) : |
82.8 |
|
Stellar Radius(Rsun) : |
0.7 |
(Rsun Measured) |
|
Stellar Mass(Msun) : |
0.6 |
(Msun Measured) |
0.6 |
(Msun Estimated) |
|
Star Age : |
0.1 |
(GY) |
|
Temperature : |
4410 |
(K) |
|
Spectral type : |
K5V |
|
UV portion[%]: |
1.3 |
|
Visible portion[%]: |
29.5 |
|
IR portion[%]: |
69.2 |
|
Metalicity : |
0.3 |
|
Absolute Magnitude: |
7.9 |
|
Apparent Magnitude: |
9.9 |
|
Right Ascension(RA) |
110.9333 |
|
Declination (DEC) |
20.4142 |
|
Hubble Space Telescope Guide Star Catalog (GSC) ID |
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Discovered by |
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Discovery Paper - Authors |
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|
Discovery Paper - Title |
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|
Discovery Paper - Journal |
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|
Discovery Paper - URL |
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SIMBAD LINK |
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Open Exoplanet Database Link |
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BD+20 1790 b
BD+20 1790 b
BD+20 1790 b is an exoplanet orbiting the star BD+20 1790, located about 82.8 light-years (25.4 pc) away from Solar System. Its discovery was publicly announced on 2009.
The host star BD+20 1790 has apparent magnitude of 9.9, with absolute magnitude of 7.9. It is 0.6 times more massive and 0.7 times bigger compared with our Sun. The surface temperature is 4410 with its spectral types of K5V
In this planetary system, the extrasolar planet BD+20 1790 b orbits around the star BD+20 1790 every 7.8 days with its orbital distance of 0.07 AU ( 9873459.5 km)
(Projected orbit of BD+20 1790 b around its host star BD+20 1790)
The Star BD+20 1790 's habitable zone is located at the following distance
Inner Boundary (the orbital distance at Venus's Equivalent Radiation )
: 0.299 AU ( 44750061.9 km)
Earth Boundary (the orbital distance at Earth's Equivalent Radiation)
: 0.413 AU ( 61856280.1 km)
Outer Boundary (the orbital distance at Mars's Equivalent Radiation)
: 0.630 AU ( 94255282.1 km)
Snow Line (the orbital distance at Snow Line Equivalent Radiation)
: 0.927 AU ( 138700776.7 km)
Radiation at Planetary Boundary of BD+20 1790 b : 53676.97 W/m2
(Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star BD+20 1790)
Kopparapu Recent Venus for Star BD+20 1790 distance : 0.331 AU
Kopparapu Runaway Greenhouse for Earth-sized planet for Star BD+20 1790 distance : 0.420 AU
Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star BD+20 1790 distance : 0.405 AU
Kopparapu Runaway Greenhouse for Mars-sized planet for Star BD+20 1790 distance : 0.445 AU
Kopparapu Outer Boundary for Maximum Greenhouse for Star BD+20 1790 distance : 0.780 AU
Kopparapu Outer Boundary for Early Mars for Star BD+20 1790 distance : 0.823 AU
(Habitable zone calculated based on Kopparapu et al.(2013) around the star BD+20 1790)
Original Kopparapu Recent Venus for Star BD+20 1790 distance : 0.327 AU
Original Kopparapu Runaway Greenhouse for Star BD+20 1790 distance : 0.433 AU
Original Kopparapu Moist Greenhouse for Star BD+20 1790 distance : 0.433 AU
Original Kopparapu Outer Boundary for Maximum Greenhouse for Star BD+20 1790 distance : 0.793 AU
Original Kopparapu Outer Boundary for Early Mars for Star BD+20 1790 distance : 0.825 AU
(Habitable zone calculated based on Kopparapu et al.(Original) around the star BD+20 1790)
(Position in Stellar Map of star BD+20 1790 and its Exoplanet BD+20 1790 b)
(Zoomed position in Stellar Map of star BD+20 1790 and its Exoplanet BD+20 1790 b (zoom level 3))
(Synthetic Spectrum of star BD+20 1790*)
*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
