|
Exoplanet Name : |
Lalande 21185 b |
|
Alternate Name : |
"Gl 411 b, GJ 411 b, HD 95735" |
|
Status : |
Confirmed |
|
Radius (Rjup / Re): |
0.1162 |
(Rjup) |
1.3029 |
(Rearth) |
|
Mass (Mjup / Me): |
0.0085 |
(Mjup) |
2.6898 |
(Mearth) |
|
Semi Major Axis / Orbital Distance Calculated |
0.0788 |
(AU) |
0.0788 |
(AU Est.) |
|
Eccentricity : |
0.0630 |
|
Orbital Period(Yrs) |
0.0354 |
|
Orbital Period(Observed/Estimated) |
12.94 |
(Days Obs.) |
11.91 |
(Days Est.) |
|
Surface Gravity (G Earth) |
1.5845 |
|
Star Radiation at Atmospheric Boundary: |
6549.8 |
(W/m2) |
|
Measured Temperature (K) |
0.0 |
(K) |
|
Blackbody T 0.1(K) |
401.5 |
(K) |
|
Blackbody T 0.3(K) |
377.1 |
(K) |
|
Blackbody T 0.7(K) |
305.1 |
(K) |
|
Tidally Locked Blackbody T 0.1(K) |
477.5 |
(K) |
|
Tidally Locked Blackbody T 0.3(K) |
448.4 |
(K) |
|
Size Class: |
super-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 : |
Lalande 21185 |
|
Alternate Name : |
Gl 411 |
|
Star Distance(LY) : |
8.3 |
|
Stellar Radius(Rsun) : |
0.4 |
(Rsun Measured) |
|
Stellar Mass(Msun) : |
0.5 |
(Msun Measured) |
0.4 |
(Msun Estimated) |
|
Star Age : |
0.0 |
(GY) |
|
Temperature : |
3828 |
(K) |
|
Spectral type : |
M1.5V |
|
UV portion[%]: |
0.4 |
|
Visible portion[%]: |
19.6 |
|
IR portion[%]: |
80.0 |
|
Metalicity : |
0.0 |
|
Absolute Magnitude: |
25.0 |
|
Apparent Magnitude: |
22.0 |
|
Right Ascension(RA) |
165.8341 |
|
Declination (DEC) |
35.9700 |
|
Hubble Space Telescope Guide Star Catalog (GSC) ID |
02521-02279 |
|
Discovered by |
|
|
Discovery Paper - Authors |
|
|
Discovery Paper - Title |
|
|
Discovery Paper - Journal |
0 |
|
Discovery Paper - URL |
0 |
|
SIMBAD LINK |
http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Lalande+21185&submit=SIMBAD+search |
|
Open Exoplanet Database Link |
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Lalande 21185 b
Lalande 21185 b
Lalande 21185 b is an exoplanet orbiting the star Lalande 21185, located about 8.3 light-years ( 2.5 pc) away from Solar System. Its discovery was publicly announced on 2017.
The host star Lalande 21185 has apparent magnitude of 22.0, with absolute magnitude of 25.0. It is 0.5 times more massive and 0.4 times bigger compared with our Sun. The surface temperature is 3828 with its spectral types of M1.5V
In this planetary system, the extrasolar planet Lalande 21185 b orbits around the star Lalande 21185 every 12.9 days with its orbital distance of 0.08 AU ( 11788312.2 km)
(Projected orbit of Lalande 21185 b around its host star Lalande 21185)
The Star Lalande 21185 's habitable zone is located at the following distance
Inner Boundary (the orbital distance at Venus's Equivalent Radiation )
: 0.125 AU ( 18663561.5 km)
Earth Boundary (the orbital distance at Earth's Equivalent Radiation)
: 0.172 AU ( 25797919.3 km)
Outer Boundary (the orbital distance at Mars's Equivalent Radiation)
: 0.263 AU ( 39310319.9 km)
Snow Line (the orbital distance at Snow Line Equivalent Radiation)
: 0.387 AU ( 57846857.9 km)
Radiation at Planetary Boundary of Lalande 21185 b : 6549.76 W/m2
(Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Lalande 21185)
Kopparapu Recent Venus for Star Lalande 21185 distance : 0.140 AU
Kopparapu Runaway Greenhouse for Earth-sized planet for Star Lalande 21185 distance : 0.178 AU
Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Lalande 21185 distance : 0.171 AU
Kopparapu Runaway Greenhouse for Mars-sized planet for Star Lalande 21185 distance : 0.188 AU
Kopparapu Outer Boundary for Maximum Greenhouse for Star Lalande 21185 distance : 0.340 AU
Kopparapu Outer Boundary for Early Mars for Star Lalande 21185 distance : 0.358 AU
(Habitable zone calculated based on Kopparapu et al.(2013) around the star Lalande 21185)
Original Kopparapu Recent Venus for Star Lalande 21185 distance : 0.139 AU
Original Kopparapu Runaway Greenhouse for Star Lalande 21185 distance : 0.184 AU
Original Kopparapu Moist Greenhouse for Star Lalande 21185 distance : 0.184 AU
Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Lalande 21185 distance : 0.345 AU
Original Kopparapu Outer Boundary for Early Mars for Star Lalande 21185 distance : 0.359 AU
(Habitable zone calculated based on Kopparapu et al.(Original) around the star Lalande 21185)
(Position in Stellar Map of star Lalande 21185 and its Exoplanet Lalande 21185 b)
(Zoomed position in Stellar Map of star Lalande 21185 and its Exoplanet Lalande 21185 b (zoom level 3))
(Synthetic Spectrum of star Lalande 21185*)
*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
