|
Exoplanet Name : |
TOI-421 b |
|
Alternate Name : |
|
|
Status : |
Confirmed |
|
Radius (Rjup / Re): |
0.2355 |
(Rjup) |
2.6397 |
(Rearth) |
|
Mass (Mjup / Me): |
0.0211 |
(Mjup) |
6.7085 |
(Mearth) |
|
Semi Major Axis / Orbital Distance Calculated |
0.0554 |
(AU) |
0.0554 |
(AU Est.) |
|
Eccentricity : |
0.1300 |
|
Orbital Period(Yrs) |
0.0142 |
|
Orbital Period(Observed/Estimated) |
5.20 |
(Days Obs.) |
0.00 |
(Days Est.) |
|
Surface Gravity (G Earth) |
0.9627 |
|
Star Radiation at Atmospheric Boundary: |
8906.9 |
(W/m2) |
|
Measured Temperature (K) |
0.0 |
(K) |
|
Blackbody T 0.1(K) |
433.6 |
(K) |
|
Blackbody T 0.3(K) |
407.2 |
(K) |
|
Blackbody T 0.7(K) |
329.5 |
(K) |
|
Tidally Locked Blackbody T 0.1(K) |
515.6 |
(K) |
|
Tidally Locked Blackbody T 0.3(K) |
484.2 |
(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-421 |
|
Alternate Name : |
|
|
Star Distance(LY) : |
0.0 |
|
Stellar Radius(Rsun) : |
0.4 |
(Rsun Estimated) |
|
Stellar Mass(Msun) : |
0.0 |
(Msun Measured) |
0.8 |
(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: |
25.0 |
|
Apparent Magnitude: |
22.0 |
|
Right Ascension(RA) |
81.8542 |
|
Declination (DEC) |
-14.2769 |
|
Hubble Space Telescope Guide Star Catalog (GSC) ID |
05344-01206 |
|
Discovered by |
|
|
Discovery Paper - Authors |
|
|
Discovery Paper - Title |
|
|
Discovery Paper - Journal |
|
|
Discovery Paper - URL |
|
|
SIMBAD LINK |
http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=TOI-421&submit=SIMBAD+search |
|
Open Exoplanet Database Link |
|
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TOI-421 b
TOI-421 b
TOI-421 b is an exoplanet orbiting the star TOI-421. Its discovery was publicly announced on 2020.
The host star TOI-421 has apparent magnitude of 22.0, with absolute magnitude of 25.0.
In this planetary system, the extrasolar planet TOI-421 b orbits around the star TOI-421 every 5.2 days with its orbital distance of 0.06 AU ( 8287722.0 km)
(Projected orbit of TOI-421 b around its host star TOI-421)
The Star TOI-421 '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 TOI-421 b : 8906.88 W/m2
(Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star TOI-421)
Kopparapu Recent Venus for Star TOI-421 distance : 0.116 AU
Kopparapu Runaway Greenhouse for Earth-sized planet for Star TOI-421 distance : 0.147 AU
Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star TOI-421 distance : 0.142 AU
Kopparapu Runaway Greenhouse for Mars-sized planet for Star TOI-421 distance : 0.156 AU
Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-421 distance : 0.288 AU
Kopparapu Outer Boundary for Early Mars for Star TOI-421 distance : 0.304 AU
(Habitable zone calculated based on Kopparapu et al.(2013) around the star TOI-421)
Original Kopparapu Recent Venus for Star TOI-421 distance : 0.115 AU
Original Kopparapu Runaway Greenhouse for Star TOI-421 distance : 0.152 AU
Original Kopparapu Moist Greenhouse for Star TOI-421 distance : 0.152 AU
Original Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-421 distance : 0.293 AU
Original Kopparapu Outer Boundary for Early Mars for Star TOI-421 distance : 0.304 AU
(Habitable zone calculated based on Kopparapu et al.(Original) around the star TOI-421)
(Position in Stellar Map of star TOI-421 and its Exoplanet TOI-421 b)
(Zoomed position in Stellar Map of star TOI-421 and its Exoplanet TOI-421 b (zoom level 3))
(Synthetic Spectrum of star TOI-421*)
*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
