|
Exoplanet Name : |
HD 211970 b |
|
Alternate Name : |
|
|
Status : |
Confirmed |
|
Radius (Rjup / Re): |
0.2088 |
(Rjup) |
2.3405 |
(Rearth) |
|
Mass (Mjup / Me): |
0.0409 |
(Mjup) |
13.0037 |
(Mearth) |
|
Semi Major Axis / Orbital Distance Calculated |
0.1430 |
(AU) |
0.1430 |
(AU Est.) |
|
Eccentricity : |
0.1500 |
|
Orbital Period(Yrs) |
0.0690 |
|
Orbital Period(Observed/Estimated) |
25.20 |
(Days Obs.) |
25.29 |
(Days Est.) |
|
Surface Gravity (G Earth) |
2.3738 |
|
Star Radiation at Atmospheric Boundary: |
5206.5 |
(W/m2) |
|
Measured Temperature (K) |
0.0 |
(K) |
|
Blackbody T 0.1(K) |
379.1 |
(K) |
|
Blackbody T 0.3(K) |
356.0 |
(K) |
|
Blackbody T 0.7(K) |
288.1 |
(K) |
|
Tidally Locked Blackbody T 0.1(K) |
450.9 |
(K) |
|
Tidally Locked Blackbody T 0.3(K) |
423.4 |
(K) |
|
Size Class: |
sub-Neptune-size |
|
Mass Class: |
|
|
Detection Type : |
Radial Velocity |
|
Mass Detection : |
Radial Velocity |
|
Radius Detection : |
|
|
Habitability by Solar Eq. Astronomical Unit: |
Not habitable |
|
Habitability by Kopparapu: |
Not habitable |
|
Star Name : |
HD 211970 |
|
Alternate Name : |
|
|
Star Distance(LY) : |
42.8 |
|
Stellar Radius(Rsun) : |
0.5 |
(Rsun Estimated) |
|
Stellar Mass(Msun) : |
0.6 |
(Msun Measured) |
0.6 |
(Msun Estimated) |
|
Star Age : |
0.0 |
(GY) |
|
Temperature : |
4127 |
(K) |
|
Spectral type : |
K7V |
|
UV portion[%]: |
0.8 |
|
Visible portion[%]: |
26.3 |
|
IR portion[%]: |
72.9 |
|
Metalicity : |
0.0 |
|
Absolute Magnitude: |
21.4 |
|
Apparent Magnitude: |
22.0 |
|
Right Ascension(RA) |
335.5700 |
|
Declination (DEC) |
-54.5600 |
|
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 |
|
|
Discovery Paper - Journal |
|
|
Discovery Paper - URL |
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|
SIMBAD LINK |
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|
Open Exoplanet Database Link |
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HD 211970 b
HD 211970 b
HD 211970 b is an exoplanet orbiting the star HD 211970, located about 42.8 light-years (13.1 pc) away from Solar System. Its discovery was publicly announced on 2019.
The host star HD 211970 has apparent magnitude of 22.0, with absolute magnitude of 21.4. It is 0.6 times more massive and 0.5 times bigger compared with our Sun. The surface temperature is 4127 with its spectral types of K7V
In this planetary system, the extrasolar planet HD 211970 b orbits around the star HD 211970 every 25.2 days with its orbital distance of 0.14 AU ( 21392495.5 km)
(Projected orbit of HD 211970 b around its host star HD 211970)
The Star HD 211970 's habitable zone is located at the following distance
Inner Boundary (the orbital distance at Venus's Equivalent Radiation )
: 0.202 AU ( 30197030.9 km)
Earth Boundary (the orbital distance at Earth's Equivalent Radiation)
: 0.279 AU ( 41740188.1 km)
Outer Boundary (the orbital distance at Mars's Equivalent Radiation)
: 0.425 AU ( 63602809.7 km)
Snow Line (the orbital distance at Snow Line Equivalent Radiation)
: 0.626 AU ( 93594320.7 km)
Radiation at Planetary Boundary of HD 211970 b : 5206.49 W/m2
(Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 211970)
Kopparapu Recent Venus for Star HD 211970 distance : 0.225 AU
Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 211970 distance : 0.285 AU
Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 211970 distance : 0.276 AU
Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 211970 distance : 0.303 AU
Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 211970 distance : 0.538 AU
Kopparapu Outer Boundary for Early Mars for Star HD 211970 distance : 0.568 AU
(Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 211970)
Original Kopparapu Recent Venus for Star HD 211970 distance : 0.223 AU
Original Kopparapu Runaway Greenhouse for Star HD 211970 distance : 0.295 AU
Original Kopparapu Moist Greenhouse for Star HD 211970 distance : 0.295 AU
Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 211970 distance : 0.547 AU
Original Kopparapu Outer Boundary for Early Mars for Star HD 211970 distance : 0.569 AU
(Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 211970)
(Position in Stellar Map of star HD 211970 and its Exoplanet HD 211970 b)
(Zoomed position in Stellar Map of star HD 211970 and its Exoplanet HD 211970 b (zoom level 3))
(Synthetic Spectrum of star HD 211970*)
*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
