|
Exoplanet Name : |
tau Cet g |
|
Alternate Name : |
|
|
Status : |
Confirmed |
|
Radius (Rjup / Re): |
0.1039 |
(Rjup) |
1.1645 |
(Rearth) |
|
Mass (Mjup / Me): |
0.0055 |
(Mjup) |
1.7518 |
(Mearth) |
|
Semi Major Axis / Orbital Distance Calculated |
0.1330 |
(AU) |
0.1330 |
(AU Est.) |
|
Eccentricity : |
0.0600 |
|
Orbital Period(Yrs) |
0.0548 |
|
Orbital Period(Observed/Estimated) |
20.00 |
(Days Obs.) |
20.02 |
(Days Est.) |
|
Surface Gravity (G Earth) |
1.2918 |
|
Star Radiation at Atmospheric Boundary: |
35556.1 |
(W/m2) |
|
Measured Temperature (K) |
0.0 |
(K) |
|
Blackbody T 0.1(K) |
612.9 |
(K) |
|
Blackbody T 0.3(K) |
575.6 |
(K) |
|
Blackbody T 0.7(K) |
465.7 |
(K) |
|
Tidally Locked Blackbody T 0.1(K) |
728.8 |
(K) |
|
Tidally Locked Blackbody T 0.3(K) |
684.5 |
(K) |
|
Size Class: |
Earth-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 : |
tau Cet |
|
Alternate Name : |
|
|
Star Distance(LY) : |
11.9 |
|
Stellar Radius(Rsun) : |
0.8 |
(Rsun Measured) |
|
Stellar Mass(Msun) : |
0.8 |
(Msun Measured) |
0.8 |
(Msun Estimated) |
|
Star Age : |
5.8 |
(GY) |
|
Temperature : |
5344 |
(K) |
|
Spectral type : |
G8.5 V |
|
UV portion[%]: |
6.1 |
|
Visible portion[%]: |
41.9 |
|
IR portion[%]: |
52.0 |
|
Metalicity : |
-0.6 |
|
Absolute Magnitude: |
5.7 |
|
Apparent Magnitude: |
3.5 |
|
Right Ascension(RA) |
26.0167 |
|
Declination (DEC) |
-15.9375 |
|
Hubble Space Telescope Guide Star Catalog (GSC) ID |
|
|
Discovered by |
|
|
Discovery Paper - Authors |
|
|
Discovery Paper - Title |
|
|
Discovery Paper - Journal |
|
|
Discovery Paper - URL |
|
|
SIMBAD LINK |
https://simbad.u-strasbg.fr/simbad/sim-basic?Ident=tau+Cet&submit=SIMBAD+search |
|
Open Exoplanet Database Link |
http://www.openexoplanetcatalogue.com/planet/tau%20Ceti%20e/ |
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tau Cet g
tau Cet g
tau Cet g is an exoplanet orbiting the star tau Cet, located about 11.9 light-years ( 3.6 pc) away from Solar System. Its discovery was publicly announced on 2017.
The host star tau Cet has apparent magnitude of 3.5, with absolute magnitude of 5.7. It is 0.8 times more massive and 0.8 times bigger compared with our Sun. The surface temperature is 5344 with its spectral types of G8.5 V
In this planetary system, the extrasolar planet tau Cet g orbits around the star tau Cet every 20.0 days with its orbital distance of 0.13 AU ( 19896516.8 km)
(Projected orbit of tau Cet g around its host star tau Cet)
The Star tau Cet 's habitable zone is located at the following distance
Inner Boundary (the orbital distance at Venus's Equivalent Radiation )
: 0.491 AU ( 73394615.3 km)
Earth Boundary (the orbital distance at Earth's Equivalent Radiation)
: 0.678 AU ( 101450538.7 km)
Outer Boundary (the orbital distance at Mars's Equivalent Radiation)
: 1.033 AU ( 154588170.0 km)
Snow Line (the orbital distance at Snow Line Equivalent Radiation)
: 1.521 AU ( 227483264.3 km)
Radiation at Planetary Boundary of tau Cet g : 35556.07 W/m2
(Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star tau Cet)
Kopparapu Recent Venus for Star tau Cet distance : 0.521 AU
Kopparapu Runaway Greenhouse for Earth-sized planet for Star tau Cet distance : 0.660 AU
Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star tau Cet distance : 0.638 AU
Kopparapu Runaway Greenhouse for Mars-sized planet for Star tau Cet distance : 0.699 AU
Kopparapu Outer Boundary for Maximum Greenhouse for Star tau Cet distance : 1.181 AU
Kopparapu Outer Boundary for Early Mars for Star tau Cet distance : 1.246 AU
(Habitable zone calculated based on Kopparapu et al.(2013) around the star tau Cet)
Original Kopparapu Recent Venus for Star tau Cet distance : 0.518 AU
Original Kopparapu Runaway Greenhouse for Star tau Cet distance : 0.680 AU
Original Kopparapu Moist Greenhouse for Star tau Cet distance : 0.686 AU
Original Kopparapu Outer Boundary for Maximum Greenhouse for Star tau Cet distance : 1.202 AU
Original Kopparapu Outer Boundary for Early Mars for Star tau Cet distance : 1.250 AU
(Habitable zone calculated based on Kopparapu et al.(Original) around the star tau Cet)
(Position in Stellar Map of star tau Cet and its Exoplanet tau Cet g)
(Zoomed position in Stellar Map of star tau Cet and its Exoplanet tau Cet g (zoom level 3))
(Synthetic Spectrum of star tau Cet*)
*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
