|
Exoplanet Name : |
23 Lib b |
|
Alternate Name : |
HD 134987 b |
|
Status : |
Confirmed |
|
Radius (Rjup / Re): |
0.9078 |
(Rjup) |
10.1759 |
(Rearth) |
|
Mass (Mjup / Me): |
1.5900 |
(Mjup) |
505.5214 |
(Mearth) |
|
Semi Major Axis / Orbital Distance Calculated |
0.8100 |
(AU) |
0.8100 |
(AU Est.) |
|
Eccentricity : |
0.2330 |
|
Orbital Period(Yrs) |
0.7069 |
|
Orbital Period(Observed/Estimated) |
258.19 |
(Days Obs.) |
257.41 |
(Days Est.) |
|
Surface Gravity (G Earth) |
4.8820 |
|
Star Radiation at Atmospheric Boundary: |
3170.3 |
(W/m2) |
|
Measured Temperature (K) |
0.0 |
(K) |
|
Blackbody T 0.1(K) |
334.9 |
(K) |
|
Blackbody T 0.3(K) |
314.5 |
(K) |
|
Blackbody T 0.7(K) |
254.5 |
(K) |
|
Tidally Locked Blackbody T 0.1(K) |
398.3 |
(K) |
|
Tidally Locked Blackbody T 0.3(K) |
374.0 |
(K) |
|
Size Class: |
Jupiter-size |
|
Mass Class: |
|
|
Detection Type : |
Radial Velocity |
|
Mass Detection : |
|
|
Radius Detection : |
|
|
Habitability by Solar Eq. Astronomical Unit: |
Not habitable |
|
Habitability by Kopparapu: |
Not habitable |
|
Star Name : |
23 Lib |
|
Alternate Name : |
HD 134987 |
|
Star Distance(LY) : |
72.4 |
|
Stellar Radius(Rsun) : |
1.2 |
(Rsun Measured) |
|
Stellar Mass(Msun) : |
1.1 |
(Msun Measured) |
1.1 |
(Msun Estimated) |
|
Star Age : |
9.7 |
(GY) |
|
Temperature : |
5740 |
(K) |
|
Spectral type : |
G5 V |
|
UV portion[%]: |
7.7 |
|
Visible portion[%]: |
44.6 |
|
IR portion[%]: |
47.7 |
|
Metalicity : |
0.2 |
|
Absolute Magnitude: |
4.7 |
|
Apparent Magnitude: |
6.5 |
|
Right Ascension(RA) |
228.3667 |
|
Declination (DEC) |
-25.3092 |
|
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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23 Lib b
23 Lib b
23 Lib b is an exoplanet orbiting the star 23 Lib, located about 72.4 light-years (22.2 pc) away from Solar System. Its discovery was publicly announced on 1999.
The host star 23 Lib has apparent magnitude of 6.5, with absolute magnitude of 4.7. It is 1.1 times more massive and 1.2 times bigger compared with our Sun. The surface temperature is 5740 with its spectral types of G5 V
In this planetary system, the extrasolar planet 23 Lib b orbits around the star 23 Lib every 258.2 days with its orbital distance of 0.81 AU ( 121174275.3 km)
(Projected orbit of 23 Lib b around its host star 23 Lib)
The Star 23 Lib 's habitable zone is located at the following distance
Inner Boundary (the orbital distance at Venus's Equivalent Radiation )
: 0.892 AU ( 133472535.4 km)
Earth Boundary (the orbital distance at Earth's Equivalent Radiation)
: 1.233 AU ( 184493924.5 km)
Outer Boundary (the orbital distance at Mars's Equivalent Radiation)
: 1.879 AU ( 281127912.5 km)
Snow Line (the orbital distance at Snow Line Equivalent Radiation)
: 2.765 AU ( 413692038.6 km)
Radiation at Planetary Boundary of 23 Lib b : 3170.31 W/m2
(Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star 23 Lib)
Kopparapu Recent Venus for Star 23 Lib distance : 0.927 AU
Kopparapu Runaway Greenhouse for Earth-sized planet for Star 23 Lib distance : 1.174 AU
Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star 23 Lib distance : 1.134 AU
Kopparapu Runaway Greenhouse for Mars-sized planet for Star 23 Lib distance : 1.243 AU
Kopparapu Outer Boundary for Maximum Greenhouse for Star 23 Lib distance : 2.075 AU
Kopparapu Outer Boundary for Early Mars for Star 23 Lib distance : 2.188 AU
(Habitable zone calculated based on Kopparapu et al.(2013) around the star 23 Lib)
Original Kopparapu Recent Venus for Star 23 Lib distance : 0.927 AU
Original Kopparapu Runaway Greenhouse for Star 23 Lib distance : 1.206 AU
Original Kopparapu Moist Greenhouse for Star 23 Lib distance : 1.227 AU
Original Kopparapu Outer Boundary for Maximum Greenhouse for Star 23 Lib distance : 2.111 AU
Original Kopparapu Outer Boundary for Early Mars for Star 23 Lib distance : 2.195 AU
(Habitable zone calculated based on Kopparapu et al.(Original) around the star 23 Lib)
(Position in Stellar Map of star 23 Lib and its Exoplanet 23 Lib b)
(Zoomed position in Stellar Map of star 23 Lib and its Exoplanet 23 Lib b (zoom level 3))
(Synthetic Spectrum of star 23 Lib*)
*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
