|
Exoplanet Name : |
TOI-455 b |
|
Alternate Name : |
LTT 1445A b |
|
Status : |
Confirmed |
|
Radius (Rjup / Re): |
0.1164 |
(Rjup) |
1.3051 |
(Rearth) |
|
Mass (Mjup / Me): |
0.0090 |
(Mjup) |
2.8710 |
(Mearth) |
|
Semi Major Axis / Orbital Distance Calculated |
0.0381 |
(AU) |
0.0381 |
(AU Est.) |
|
Eccentricity : |
0.1100 |
|
Orbital Period(Yrs) |
0.0147 |
|
Orbital Period(Observed/Estimated) |
5.36 |
(Days Obs.) |
5.37 |
(Days Est.) |
|
Surface Gravity (G Earth) |
1.6856 |
|
Star Radiation at Atmospheric Boundary: |
7652.2 |
(W/m2) |
|
Measured Temperature (K) |
0.0 |
(K) |
|
Blackbody T 0.1(K) |
417.4 |
(K) |
|
Blackbody T 0.3(K) |
392.0 |
(K) |
|
Blackbody T 0.7(K) |
317.2 |
(K) |
|
Tidally Locked Blackbody T 0.1(K) |
496.4 |
(K) |
|
Tidally Locked Blackbody T 0.3(K) |
466.2 |
(K) |
|
Size Class: |
super-Earth-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 1445A |
|
Alternate Name : |
|
|
Star Distance(LY) : |
22.5 |
|
Stellar Radius(Rsun) : |
0.3 |
(Rsun Measured) |
|
Stellar Mass(Msun) : |
0.3 |
(Msun Measured) |
0.3 |
(Msun Estimated) |
|
Star Age : |
0.0 |
(GY) |
|
Temperature : |
3340 |
(K) |
|
Spectral type : |
M |
|
UV portion[%]: |
0.2 |
|
Visible portion[%]: |
12.0 |
|
IR portion[%]: |
87.7 |
|
Metalicity : |
-0.3 |
|
Absolute Magnitude: |
22.8 |
|
Apparent Magnitude: |
22.0 |
|
Right Ascension(RA) |
45.4625 |
|
Declination (DEC) |
-16.5933 |
|
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=LTT+1445A&submit=SIMBAD+search |
|
Open Exoplanet Database Link |
|
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TOI-455 b
TOI-455 b
TOI-455 b is an exoplanet orbiting the star LTT 1445A, located about 22.5 light-years ( 6.9 pc) away from Solar System. Its discovery was publicly announced on 2019.
The host star LTT 1445A has apparent magnitude of 22.0, with absolute magnitude of 22.8. It is 0.3 times more massive and 0.3 times bigger compared with our Sun. The surface temperature is 3340 with its spectral types of M
In this planetary system, the extrasolar planet TOI-455 b orbits around the star LTT 1445A every 5.4 days with its orbital distance of 0.04 AU ( 5704166.8 km)
(Projected orbit of TOI-455 b around its host star LTT 1445A)
The Star LTT 1445A 's habitable zone is located at the following distance
Inner Boundary (the orbital distance at Venus's Equivalent Radiation )
: 0.065 AU ( 9761460.7 km)
Earth Boundary (the orbital distance at Earth's Equivalent Radiation)
: 0.090 AU ( 13492889.7 km)
Outer Boundary (the orbital distance at Mars's Equivalent Radiation)
: 0.137 AU ( 20560177.9 km)
Snow Line (the orbital distance at Snow Line Equivalent Radiation)
: 0.202 AU ( 30255202.4 km)
Radiation at Planetary Boundary of TOI-455 b : 7652.17 W/m2
(Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star LTT 1445A)
Kopparapu Recent Venus for Star LTT 1445A distance : 0.074 AU
Kopparapu Runaway Greenhouse for Earth-sized planet for Star LTT 1445A distance : 0.093 AU
Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star LTT 1445A distance : 0.090 AU
Kopparapu Runaway Greenhouse for Mars-sized planet for Star LTT 1445A distance : 0.099 AU
Kopparapu Outer Boundary for Maximum Greenhouse for Star LTT 1445A distance : 0.183 AU
Kopparapu Outer Boundary for Early Mars for Star LTT 1445A distance : 0.193 AU
(Habitable zone calculated based on Kopparapu et al.(2013) around the star LTT 1445A)
Original Kopparapu Recent Venus for Star LTT 1445A distance : 0.073 AU
Original Kopparapu Runaway Greenhouse for Star LTT 1445A distance : 0.097 AU
Original Kopparapu Moist Greenhouse for Star LTT 1445A distance : 0.097 AU
Original Kopparapu Outer Boundary for Maximum Greenhouse for Star LTT 1445A distance : 0.186 AU
Original Kopparapu Outer Boundary for Early Mars for Star LTT 1445A distance : 0.194 AU
(Habitable zone calculated based on Kopparapu et al.(Original) around the star LTT 1445A)
(Position in Stellar Map of star LTT 1445A and its Exoplanet TOI-455 b)
(Zoomed position in Stellar Map of star LTT 1445A and its Exoplanet TOI-455 b (zoom level 3))
(Synthetic Spectrum of star LTT 1445A*)
*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
