|
Exoplanet Name : |
HD 21749 b |
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Alternate Name : |
TOI 186.01 |
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Radius (Rjup / Re): |
0.2530 |
(Rjup) |
2.8360 |
(Rearth) |
|
Mass (Mjup / Me): |
0.0730 |
(Mjup) |
23.2095 |
(Mearth) |
|
Semi Major Axis / Orbital Distance Calculated |
0.1914 |
(AU) |
0.1914 |
(AU Est.) |
|
Eccentricity : |
0.1980 |
|
Orbital Period(Yrs) |
0.0975 |
|
Orbital Period(Observed/Estimated) |
35.61 |
(Days Obs.) |
35.80 |
(Days Est.) |
|
Star Radiation at Atmospheric Boundary: |
7494.8 |
(W/m2) |
|
Measured Temperature (K) |
0.0 |
(K) |
|
Blackbody T 0.1(K) |
415.3 |
(K) |
|
Blackbody T 0.3(K) |
390.0 |
(K) |
|
Blackbody T 0.7(K) |
315.5 |
(K) |
|
Tidally Locked Blackbody T 0.1(K) |
493.8 |
(K) |
|
Tidally Locked Blackbody T 0.3(K) |
463.8 |
(K) |
|
Size Class: |
sub-Neptune-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 : |
HD 21749 |
|
Alternate Name : |
TOI 186 |
|
Star Distance(LY) : |
53.3 |
|
Stellar Radius(Rsun) : |
0.7 |
(Rsun Measured) |
|
Stellar Mass(Msun) : |
0.7 |
(Msun Measured) |
0.7 |
(Msun Estimated) |
|
Star Age : |
0.0 |
(GY) |
|
Temperature : |
4640 |
(K) |
|
Spectral type : |
K4.5 |
|
Metalicity : |
0.0 |
|
Absolute Magnitude: |
7.0 |
|
Apparent Magnitude: |
8.1 |
|
Right Ascension(RA) |
51.7500 |
|
Declination (DEC) |
-63.5022 |
|
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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HD 21749 b
HD 21749 b
HD 21749 b is an exoplanet orbiting the star HD 21749, located about 53.3 light-years (16.3 pc) away from Solar System. Its discovery was publicly announced on 2018.
The host star HD 21749 has apparent magnitude of 8.1, with absolute magnitude of 7.0. It is 0.7 times more massive and 0.7 times bigger compared with our Sun. The surface temperature is 4640 with its spectral types of K4.5
In this planetary system, the extrasolar planet HD 21749 b orbits around the star HD 21749 every 35.6 days with its orbital distance of 0.19 AU ( 28633032.5 km)
(Projected orbit of HD 21749 b around its host star HD 21749)
The Star HD 21749 's habitable zone is located at the following distance
Inner Boundary (the orbital distance at Venus's Equivalent Radiation )
: 0.324 AU ( 48492980.5 km)
Earth Boundary (the orbital distance at Earth's Equivalent Radiation)
: 0.448 AU ( 67029971.8 km)
Outer Boundary (the orbital distance at Mars's Equivalent Radiation)
: 0.683 AU ( 102138843.4 km)
Snow Line (the orbital distance at Snow Line Equivalent Radiation)
: 1.005 AU ( 150301782.5 km)
Radiation at Planetary Boundary of HD 21749 b : 7494.84 W/m2
(Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 21749)
Kopparapu Recent Venus for Star HD 21749 distance : 0.356 AU
Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 21749 distance : 0.451 AU
Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 21749 distance : 0.436 AU
Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 21749 distance : 0.478 AU
Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 21749 distance : 0.830 AU
Kopparapu Outer Boundary for Early Mars for Star HD 21749 distance : 0.875 AU
(Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 21749)
Original Kopparapu Recent Venus for Star HD 21749 distance : 0.352 AU
Original Kopparapu Runaway Greenhouse for Star HD 21749 distance : 0.465 AU
Original Kopparapu Moist Greenhouse for Star HD 21749 distance : 0.465 AU
Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 21749 distance : 0.844 AU
Original Kopparapu Outer Boundary for Early Mars for Star HD 21749 distance : 0.877 AU
(Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 21749)
(Position in Stellar Map of star HD 21749 and its Exoplanet HD 21749 b)
(Zoomed position in Stellar Map of star HD 21749 and its Exoplanet HD 21749 b (zoom level 3))
