|
Exoplanet Name : |
TOI-1778 b |
|
Alternate Name : |
"TOI-1778.01, HD 77946 b" |
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Status : |
Confirmed |
|
Radius (Rjup / Re): |
0.2413 |
(Rjup) |
2.7051 |
(Rearth) |
|
Mass (Mjup / Me): |
0.0264 |
(Mjup) |
8.3840 |
(Mearth) |
|
Semi Major Axis / Orbital Distance Calculated |
0.0720 |
(AU) |
0.0720 |
(AU Est.) |
|
Eccentricity : |
0.2300 |
|
Orbital Period(Yrs) |
0.0179 |
|
Orbital Period(Observed/Estimated) |
6.53 |
(Days Obs.) |
6.52 |
(Days Est.) |
|
Surface Gravity (G Earth) |
1.1458 |
|
Star Radiation at Atmospheric Boundary: |
542444.1 |
(W/m2) |
|
Measured Temperature (K) |
0.0 |
(K) |
|
Blackbody T 0.1(K) |
1211.2 |
(K) |
|
Blackbody T 0.3(K) |
1137.5 |
(K) |
|
Blackbody T 0.7(K) |
920.3 |
(K) |
|
Tidally Locked Blackbody T 0.1(K) |
1440.4 |
(K) |
|
Tidally Locked Blackbody T 0.3(K) |
1352.7 |
(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 : |
TOI-1778 |
|
Alternate Name : |
"HD 77946, HIP 44746" |
|
Star Distance(LY) : |
322.9 |
|
Stellar Radius(Rsun) : |
1.3 |
(Rsun Measured) |
|
Stellar Mass(Msun) : |
1.2 |
(Msun Measured) |
1.2 |
(Msun Estimated) |
|
Star Age : |
3.9 |
(GY) |
|
Temperature : |
6046 |
(K) |
|
Spectral type : |
F9/G0IV-V |
|
UV portion[%]: |
0.3 |
|
Visible portion[%]: |
1.5 |
|
IR portion[%]: |
98.2 |
|
Metalicity : |
0.2 |
|
Absolute Magnitude: |
4.0 |
|
Apparent Magnitude: |
9.0 |
|
Right Ascension(RA) |
136.7781 |
|
Declination (DEC) |
46.6726 |
|
Hubble Space Telescope Guide Star Catalog (GSC) ID |
|
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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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TOI-1778 b
TOI-1778 b
TOI-1778 b is an exoplanet orbiting the star TOI-1778, located about 322.9 light-years (99.0 pc) away from Solar System. Its discovery was publicly announced on 2024.
The host star TOI-1778 has apparent magnitude of 9.0, with absolute magnitude of 4.0. It is 1.2 times more massive and 1.3 times bigger compared with our Sun. The surface temperature is 6046 with its spectral types of F9/G0IV-V
In this planetary system, the extrasolar planet TOI-1778 b orbits around the star TOI-1778 every 6.5 days with its orbital distance of 0.07 AU ( 10771046.7 km)
(Projected orbit of TOI-1778 b around its host star TOI-1778)
The Star TOI-1778 's habitable zone is located at the following distance
Inner Boundary (the orbital distance at Venus's Equivalent Radiation )
: 1.037 AU ( 155190700.6 km)
Earth Boundary (the orbital distance at Earth's Equivalent Radiation)
: 1.434 AU ( 214514104.4 km)
Outer Boundary (the orbital distance at Mars's Equivalent Radiation)
: 2.185 AU ( 326872023.3 km)
Snow Line (the orbital distance at Snow Line Equivalent Radiation)
: 3.215 AU ( 481006501.6 km)
Radiation at Planetary Boundary of TOI-1778 b : 542444.09 W/m2
(Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star TOI-1778)
Kopparapu Recent Venus for Star TOI-1778 distance : 1.058 AU
Kopparapu Runaway Greenhouse for Earth-sized planet for Star TOI-1778 distance : 1.340 AU
Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star TOI-1778 distance : 1.294 AU
Kopparapu Runaway Greenhouse for Mars-sized planet for Star TOI-1778 distance : 1.418 AU
Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-1778 distance : 2.350 AU
Kopparapu Outer Boundary for Early Mars for Star TOI-1778 distance : 2.479 AU
(Habitable zone calculated based on Kopparapu et al.(2013) around the star TOI-1778)
Original Kopparapu Recent Venus for Star TOI-1778 distance : 1.065 AU
Original Kopparapu Runaway Greenhouse for Star TOI-1778 distance : 1.375 AU
Original Kopparapu Moist Greenhouse for Star TOI-1778 distance : 1.409 AU
Original Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-1778 distance : 2.392 AU
Original Kopparapu Outer Boundary for Early Mars for Star TOI-1778 distance : 2.488 AU
(Habitable zone calculated based on Kopparapu et al.(Original) around the star TOI-1778)
(Position in Stellar Map of star TOI-1778 and its Exoplanet TOI-1778 b)
(Zoomed position in Stellar Map of star TOI-1778 and its Exoplanet TOI-1778 b (zoom level 3))
(Synthetic Spectrum of star TOI-1778*)
*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
