|
Exoplanet Name : |
20 LMi Ab |
|
Alternate Name : |
HD 86728 b |
|
Status : |
Confirmed |
|
Radius (Rjup / Re): |
0.1973 |
(Rjup) |
2.2121 |
(Rearth) |
|
Mass (Mjup / Me): |
0.0320 |
(Mjup) |
10.1740 |
(Mearth) |
|
Semi Major Axis / Orbital Distance Calculated |
0.2000 |
(AU) |
0.2000 |
(AU Est.) |
|
Eccentricity : |
0.2000 |
|
Orbital Period(Yrs) |
0.0853 |
|
Orbital Period(Observed/Estimated) |
31.15 |
(Days Obs.) |
32.19 |
(Days Est.) |
|
Surface Gravity (G Earth) |
2.0792 |
|
Star Radiation at Atmospheric Boundary: |
46601.5 |
(W/m2) |
|
Measured Temperature (K) |
0.0 |
(K) |
|
Blackbody T 0.1(K) |
655.8 |
(K) |
|
Blackbody T 0.3(K) |
615.8 |
(K) |
|
Blackbody T 0.7(K) |
498.3 |
(K) |
|
Tidally Locked Blackbody T 0.1(K) |
779.8 |
(K) |
|
Tidally Locked Blackbody T 0.3(K) |
732.3 |
(K) |
|
Size Class: |
sub-Neptune-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 : |
20 LMi A |
|
Alternate Name : |
"HD 86728, GJ 376 A" |
|
Star Distance(LY) : |
48.7 |
|
Stellar Radius(Rsun) : |
1.2 |
(Rsun Measured) |
|
Stellar Mass(Msun) : |
1.0 |
(Msun Measured) |
1.1 |
(Msun Estimated) |
|
Star Age : |
0.0 |
(GY) |
|
Temperature : |
5742 |
(K) |
|
Spectral type : |
G3Va |
|
UV portion[%]: |
7.7 |
|
Visible portion[%]: |
44.6 |
|
IR portion[%]: |
47.7 |
|
Metalicity : |
0.2 |
|
Absolute Magnitude: |
4.5 |
|
Apparent Magnitude: |
5.4 |
|
Right Ascension(RA) |
150.2527 |
|
Declination (DEC) |
31.9237 |
|
Hubble Space Telescope Guide Star Catalog (GSC) ID |
|
|
Discovered by |
|
|
Discovery Paper - Authors |
|
|
Discovery Paper - Title |
|
|
Discovery Paper - Journal |
|
|
Discovery Paper - URL |
|
|
SIMBAD LINK |
|
|
Open Exoplanet Database Link |
|
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/
20 LMi Ab
20 LMi Ab
20 LMi Ab is an exoplanet orbiting the star 20 LMi A, located about 48.7 light-years (14.9 pc) away from Solar System. Its discovery was publicly announced on 2020.
The host star 20 LMi A has apparent magnitude of 5.4, with absolute magnitude of 4.5. It is 1.0 times more massive and 1.2 times bigger compared with our Sun. The surface temperature is 5742 with its spectral types of G3Va
In this planetary system, the extrasolar planet 20 LMi Ab orbits around the star 20 LMi A every 31.1 days with its orbital distance of 0.20 AU ( 29919574.1 km)
(Projected orbit of 20 LMi Ab around its host star 20 LMi A)
The Star 20 LMi A 's habitable zone is located at the following distance
Inner Boundary (the orbital distance at Venus's Equivalent Radiation )
: 0.845 AU ( 126353023.4 km)
Earth Boundary (the orbital distance at Earth's Equivalent Radiation)
: 1.167 AU ( 174652898.3 km)
Outer Boundary (the orbital distance at Mars's Equivalent Radiation)
: 1.779 AU ( 266132366.4 km)
Snow Line (the orbital distance at Snow Line Equivalent Radiation)
: 2.618 AU ( 391625435.7 km)
Radiation at Planetary Boundary of 20 LMi Ab : 46601.50 W/m2
(Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star 20 LMi A)
Kopparapu Recent Venus for Star 20 LMi A distance : 0.877 AU
Kopparapu Runaway Greenhouse for Earth-sized planet for Star 20 LMi A distance : 1.111 AU
Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star 20 LMi A distance : 1.073 AU
Kopparapu Runaway Greenhouse for Mars-sized planet for Star 20 LMi A distance : 1.176 AU
Kopparapu Outer Boundary for Maximum Greenhouse for Star 20 LMi A distance : 1.964 AU
Kopparapu Outer Boundary for Early Mars for Star 20 LMi A distance : 2.071 AU
(Habitable zone calculated based on Kopparapu et al.(2013) around the star 20 LMi A)
Original Kopparapu Recent Venus for Star 20 LMi A distance : 0.878 AU
Original Kopparapu Runaway Greenhouse for Star 20 LMi A distance : 1.142 AU
Original Kopparapu Moist Greenhouse for Star 20 LMi A distance : 1.162 AU
Original Kopparapu Outer Boundary for Maximum Greenhouse for Star 20 LMi A distance : 1.998 AU
Original Kopparapu Outer Boundary for Early Mars for Star 20 LMi A distance : 2.078 AU
(Habitable zone calculated based on Kopparapu et al.(Original) around the star 20 LMi A)
(Position in Stellar Map of star 20 LMi A and its Exoplanet 20 LMi Ab)
(Zoomed position in Stellar Map of star 20 LMi A and its Exoplanet 20 LMi Ab (zoom level 3))
(Synthetic Spectrum of star 20 LMi A*)
*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
