Exoplanet Name : |
CAHA Tau 2 |
Alternate Name : |
|
Status : |
Confirmed |
Radius (Rjup / Re): |
0.9078 |
(Rjup) |
10.1759 |
(Rearth) |
Mass (Mjup / Me): |
11.5000 |
(Mjup) |
3656.2870 |
(Mearth) |
Semi Major Axis / Orbital Distance Calculated |
0.0000 |
(AU) |
0.0000 |
(AU Est.) |
Eccentricity : |
0.0000 |
Orbital Period(Yrs) |
0.0000 |
Orbital Period(Observed/Estimated) |
0.00 |
(Days Obs.) |
0.00 |
(Days Est.) |
Surface Gravity (G Earth) |
35.3100 |
Star Radiation at Atmospheric Boundary: |
0.0 |
(W/m2) |
Measured Temperature (K) |
0.0 |
(K) |
Blackbody T 0.1(K) |
0.0 |
(K) |
Blackbody T 0.3(K) |
0.0 |
(K) |
Blackbody T 0.7(K) |
0.0 |
(K) |
Tidally Locked Blackbody T 0.1(K) |
0.0 |
(K) |
Tidally Locked Blackbody T 0.3(K) |
0.0 |
(K) |
Size Class: |
Jupiter-size |
Mass Class: |
|
Detection Type : |
Imaging |
Mass Detection : |
Spectrum |
Radius Detection : |
|
Habitability by Solar Eq. Astronomical Unit: |
Not habitable |
Habitability by Kopparapu: |
Not habitable |
Star Name : |
|
Alternate Name : |
|
Star Distance(LY) : |
456.6 |
Stellar Radius(Rsun) : |
0.4 |
(Rsun Estimated) |
Stellar Mass(Msun) : |
0.0 |
(Msun Measured) |
0.0 |
(Msun Estimated) |
Star Age : |
0.0 |
(GY) |
Temperature : |
3300 |
(K) |
Spectral type : |
M9 |
UV portion[%]: |
0.2 |
Visible portion[%]: |
11.2 |
IR portion[%]: |
88.6 |
Metalicity : |
0.0 |
Absolute Magnitude: |
16.3 |
Apparent Magnitude: |
22.0 |
Right Ascension(RA) |
69.9467 |
Declination (DEC) |
25.8923 |
Hubble Space Telescope Guide Star Catalog (GSC) ID |
|
Discovered by |
|
Discovery Paper - Authors |
|
Discovery Paper - Title |
|
Discovery Paper - Journal |
|
Discovery Paper - URL |
|
SIMBAD LINK |
|
Open Exoplanet Database Link |
|
![](CAHA_Tau_2_CSun.png) |
![](CAHA_Tau_2_CJup.png) |
![](CAHA_Tau_2_CNep.png) |
![](CAHA_Tau_2_CEar.png) |
/
CAHA Tau 2
CAHA Tau 2
CAHA Tau 2 is an exoplanet orbiting the star , located about 456.6 light-years (140.0 pc) away from Solar System. Its discovery was publicly announced on 2010.
The host star has apparent magnitude of 22.0, with absolute magnitude of 16.3.
(Projected orbit of CAHA Tau 2 around its host star )
![](CAHA_Tau_2_Orb.png)
The Star 's habitable zone is located at the following distance
Inner Boundary (the orbital distance at Venus's Equivalent Radiation )
: 0.102 AU ( 15301294.9 km)
Earth Boundary (the orbital distance at Earth's Equivalent Radiation)
: 0.141 AU ( 21150388.3 km)
Outer Boundary (the orbital distance at Mars's Equivalent Radiation)
: 0.215 AU ( 32228511.1 km)
Snow Line (the orbital distance at Snow Line Equivalent Radiation)
: 0.317 AU ( 47425666.0 km)
Radiation at Planetary Boundary of CAHA Tau 2 : 0.00 W/m2
(Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star )
![](CAHA_Tau_2_OrbH.png)
Kopparapu Recent Venus for Star distance : 0.116 AU
Kopparapu Runaway Greenhouse for Earth-sized planet for Star distance : 0.147 AU
Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star distance : 0.142 AU
Kopparapu Runaway Greenhouse for Mars-sized planet for Star distance : 0.156 AU
Kopparapu Outer Boundary for Maximum Greenhouse for Star distance : 0.288 AU
Kopparapu Outer Boundary for Early Mars for Star distance : 0.304 AU
(Habitable zone calculated based on Kopparapu et al.(2013) around the star )
![](CAHA_Tau_2_OrbK.png)
Original Kopparapu Recent Venus for Star distance : 0.115 AU
Original Kopparapu Runaway Greenhouse for Star distance : 0.152 AU
Original Kopparapu Moist Greenhouse for Star distance : 0.152 AU
Original Kopparapu Outer Boundary for Maximum Greenhouse for Star distance : 0.293 AU
Original Kopparapu Outer Boundary for Early Mars for Star distance : 0.304 AU
(Habitable zone calculated based on Kopparapu et al.(Original) around the star )
![](CAHA_Tau_2_OrbKO.png)
(Position in Stellar Map of star and its Exoplanet CAHA Tau 2)
![](CAHA_Tau_2_STZ0.png)
(Zoomed position in Stellar Map of star and its Exoplanet CAHA Tau 2 (zoom level 3))
![](CAHA_Tau_2_STZ3.png)
(Synthetic Spectrum of star *)
![](CAHA_Tau_2_Spc.png)
*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