|
Exoplanet Name : |
TW Hya b |
|
Alternate Name : |
|
|
Status : |
Confirmed |
|
Radius (Rjup / Re): |
0.2529 |
(Rjup) |
2.8342 |
(Rearth) |
|
Mass (Mjup / Me): |
0.0940 |
(Mjup) |
29.8862 |
(Mearth) |
|
Semi Major Axis / Orbital Distance Calculated |
0.0750 |
(AU) |
0.0750 |
(AU Est.) |
|
Eccentricity : |
0.0000 |
|
Orbital Period(Yrs) |
0.0228 |
|
Orbital Period(Observed/Estimated) |
8.34 |
(Days Obs.) |
8.39 |
(Days Est.) |
|
Surface Gravity (G Earth) |
3.7205 |
|
Star Radiation at Atmospheric Boundary: |
78925.7 |
(W/m2) |
|
Measured Temperature (K) |
0.0 |
(K) |
|
Blackbody T 0.1(K) |
748.1 |
(K) |
|
Blackbody T 0.3(K) |
702.5 |
(K) |
|
Blackbody T 0.7(K) |
568.4 |
(K) |
|
Tidally Locked Blackbody T 0.1(K) |
889.6 |
(K) |
|
Tidally Locked Blackbody T 0.3(K) |
835.4 |
(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 : |
TW Hya |
|
Alternate Name : |
|
|
Star Distance(LY) : |
195.7 |
|
Stellar Radius(Rsun) : |
1.2 |
(Rsun Measured) |
|
Stellar Mass(Msun) : |
0.8 |
(Msun Measured) |
0.8 |
(Msun Estimated) |
|
Star Age : |
0.0 |
(GY) |
|
Temperature : |
4050 |
(K) |
|
Spectral type : |
K8V |
|
UV portion[%]: |
0.8 |
|
Visible portion[%]: |
25.3 |
|
IR portion[%]: |
73.9 |
|
Metalicity : |
0.0 |
|
Absolute Magnitude: |
7.2 |
|
Apparent Magnitude: |
11.1 |
|
Right Ascension(RA) |
165.4667 |
|
Declination (DEC) |
-34.7047 |
|
Hubble Space Telescope Guide Star Catalog (GSC) ID |
|
|
Discovered by |
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|
Discovery Paper - Authors |
|
|
Discovery Paper - Title |
|
|
Discovery Paper - Journal |
|
|
Discovery Paper - URL |
|
|
SIMBAD LINK |
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|
Open Exoplanet Database Link |
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TW Hya b
TW Hya b
TW Hya b is an exoplanet orbiting the star TW Hya, located about 195.7 light-years (60.0 pc) away from Solar System. Its discovery was publicly announced on 2024.
The host star TW Hya has apparent magnitude of 11.1, with absolute magnitude of 7.2. It is 0.8 times more massive and 1.2 times bigger compared with our Sun. The surface temperature is 4050 with its spectral types of K8V
In this planetary system, the extrasolar planet TW Hya b orbits around the star TW Hya every 8.3 days with its orbital distance of 0.07 AU ( 11219840.3 km)
(Projected orbit of TW Hya b around its host star TW Hya)
The Star TW Hya 's habitable zone is located at the following distance
Inner Boundary (the orbital distance at Venus's Equivalent Radiation )
: 0.412 AU ( 61663212.7 km)
Earth Boundary (the orbital distance at Earth's Equivalent Radiation)
: 0.570 AU ( 85234674.5 km)
Outer Boundary (the orbital distance at Mars's Equivalent Radiation)
: 0.868 AU ( 129878781.5 km)
Snow Line (the orbital distance at Snow Line Equivalent Radiation)
: 1.278 AU ( 191122316.6 km)
Radiation at Planetary Boundary of TW Hya b : 78925.68 W/m2
(Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star TW Hya)
Kopparapu Recent Venus for Star TW Hya distance : 0.461 AU
Kopparapu Runaway Greenhouse for Earth-sized planet for Star TW Hya distance : 0.584 AU
Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star TW Hya distance : 0.564 AU
Kopparapu Runaway Greenhouse for Mars-sized planet for Star TW Hya distance : 0.620 AU
Kopparapu Outer Boundary for Maximum Greenhouse for Star TW Hya distance : 1.105 AU
Kopparapu Outer Boundary for Early Mars for Star TW Hya distance : 1.166 AU
(Habitable zone calculated based on Kopparapu et al.(2013) around the star TW Hya)
Original Kopparapu Recent Venus for Star TW Hya distance : 0.456 AU
Original Kopparapu Runaway Greenhouse for Star TW Hya distance : 0.604 AU
Original Kopparapu Moist Greenhouse for Star TW Hya distance : 0.603 AU
Original Kopparapu Outer Boundary for Maximum Greenhouse for Star TW Hya distance : 1.123 AU
Original Kopparapu Outer Boundary for Early Mars for Star TW Hya distance : 1.168 AU
(Habitable zone calculated based on Kopparapu et al.(Original) around the star TW Hya)
(Position in Stellar Map of star TW Hya and its Exoplanet TW Hya b)
(Zoomed position in Stellar Map of star TW Hya and its Exoplanet TW Hya b (zoom level 3))
(Synthetic Spectrum of star TW Hya*)
*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
