|
Exoplanet Name : |
LTT 9779 b |
|
Alternate Name : |
TOI-193 b |
|
Status : |
Confirmed |
|
Radius (Rjup / Re): |
0.4211 |
(Rjup) |
4.7201 |
(Rearth) |
|
Mass (Mjup / Me): |
0.0922 |
(Mjup) |
29.3298 |
(Mearth) |
|
Semi Major Axis / Orbital Distance Calculated |
0.0168 |
(AU) |
0.0168 |
(AU Est.) |
|
Eccentricity : |
0.0000 |
|
Orbital Period(Yrs) |
0.0022 |
|
Orbital Period(Observed/Estimated) |
0.79 |
(Days Obs.) |
0.79 |
(Days Est.) |
|
Surface Gravity (G Earth) |
1.3165 |
|
Star Radiation at Atmospheric Boundary: |
3236462.7 |
(W/m2) |
|
Measured Temperature (K) |
0.0 |
(K) |
|
Blackbody T 0.1(K) |
1893.0 |
(K) |
|
Blackbody T 0.3(K) |
1777.8 |
(K) |
|
Blackbody T 0.7(K) |
1438.4 |
(K) |
|
Tidally Locked Blackbody T 0.1(K) |
2251.2 |
(K) |
|
Tidally Locked Blackbody T 0.3(K) |
2114.1 |
(K) |
|
Size Class: |
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 : |
LTT 9779 |
|
Alternate Name : |
|
|
Star Distance(LY) : |
262.9 |
|
Stellar Radius(Rsun) : |
0.9 |
(Rsun Measured) |
|
Stellar Mass(Msun) : |
1.0 |
(Msun Measured) |
1.0 |
(Msun Estimated) |
|
Star Age : |
0.0 |
(GY) |
|
Temperature : |
5445 |
(K) |
|
Spectral type : |
G8 |
|
UV portion[%]: |
6.6 |
|
Visible portion[%]: |
42.8 |
|
IR portion[%]: |
50.6 |
|
Metalicity : |
0.2 |
|
Absolute Magnitude: |
5.2 |
|
Apparent Magnitude: |
9.8 |
|
Right Ascension(RA) |
358.6667 |
|
Declination (DEC) |
-37.6281 |
|
Hubble Space Telescope Guide Star Catalog (GSC) ID |
|
|
Discovered by |
|
|
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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LTT 9779 b
LTT 9779 b
LTT 9779 b is an exoplanet orbiting the star LTT 9779, located about 262.9 light-years (80.6 pc) away from Solar System. Its discovery was publicly announced on 2019.
The host star LTT 9779 has apparent magnitude of 9.8, with absolute magnitude of 5.2. It is 1.0 times more massive and 0.9 times bigger compared with our Sun. The surface temperature is 5445 with its spectral types of G8
In this planetary system, the extrasolar planet LTT 9779 b orbits around the star LTT 9779 every 0.8 days with its orbital distance of 0.02 AU ( 2511748.2 km)
(Projected orbit of LTT 9779 b around its host star LTT 9779)
The Star LTT 9779 's habitable zone is located at the following distance
Inner Boundary (the orbital distance at Venus's Equivalent Radiation )
: 0.591 AU ( 88397851.2 km)
Earth Boundary (the orbital distance at Earth's Equivalent Radiation)
: 0.817 AU ( 122188931.4 km)
Outer Boundary (the orbital distance at Mars's Equivalent Radiation)
: 1.245 AU ( 186188891.1 km)
Snow Line (the orbital distance at Snow Line Equivalent Radiation)
: 1.831 AU ( 273985109.7 km)
Radiation at Planetary Boundary of LTT 9779 b : 3236462.72 W/m2
(Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star LTT 9779)
Kopparapu Recent Venus for Star LTT 9779 distance : 0.624 AU
Kopparapu Runaway Greenhouse for Earth-sized planet for Star LTT 9779 distance : 0.791 AU
Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star LTT 9779 distance : 0.764 AU
Kopparapu Runaway Greenhouse for Mars-sized planet for Star LTT 9779 distance : 0.838 AU
Kopparapu Outer Boundary for Maximum Greenhouse for Star LTT 9779 distance : 1.410 AU
Kopparapu Outer Boundary for Early Mars for Star LTT 9779 distance : 1.487 AU
(Habitable zone calculated based on Kopparapu et al.(2013) around the star LTT 9779)
Original Kopparapu Recent Venus for Star LTT 9779 distance : 0.622 AU
Original Kopparapu Runaway Greenhouse for Star LTT 9779 distance : 0.814 AU
Original Kopparapu Moist Greenhouse for Star LTT 9779 distance : 0.822 AU
Original Kopparapu Outer Boundary for Maximum Greenhouse for Star LTT 9779 distance : 1.435 AU
Original Kopparapu Outer Boundary for Early Mars for Star LTT 9779 distance : 1.492 AU
(Habitable zone calculated based on Kopparapu et al.(Original) around the star LTT 9779)
(Position in Stellar Map of star LTT 9779 and its Exoplanet LTT 9779 b)
(Zoomed position in Stellar Map of star LTT 9779 and its Exoplanet LTT 9779 b (zoom level 3))
(Synthetic Spectrum of star LTT 9779*)
*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
