|
Exoplanet Name : |
HN Lib b |
|
Alternate Name : |
Gliese 555 b |
|
Status : |
Confirmed |
|
Radius (Rjup / Re): |
0.1401 |
(Rjup) |
1.5703 |
(Rearth) |
|
Mass (Mjup / Me): |
0.0175 |
(Mjup) |
5.5607 |
(Mearth) |
|
Semi Major Axis / Orbital Distance Calculated |
0.1417 |
(AU) |
0.1417 |
(AU Est.) |
|
Eccentricity : |
0.0790 |
|
Orbital Period(Yrs) |
0.0989 |
|
Orbital Period(Observed/Estimated) |
36.12 |
(Days Obs.) |
36.12 |
(Days Est.) |
|
Surface Gravity (G Earth) |
2.2550 |
|
Star Radiation at Atmospheric Boundary: |
685.2 |
(W/m2) |
|
Measured Temperature (K) |
0.0 |
(K) |
|
Blackbody T 0.1(K) |
228.3 |
(K) |
|
Blackbody T 0.3(K) |
214.4 |
(K) |
|
Blackbody T 0.7(K) |
173.5 |
(K) |
|
Tidally Locked Blackbody T 0.1(K) |
271.6 |
(K) |
|
Tidally Locked Blackbody T 0.3(K) |
255.0 |
(K) |
|
Size Class: |
super-Earth-size |
|
Mass Class: |
|
|
Detection Type : |
Radial Velocity |
|
Mass Detection : |
Radial Velocity |
|
Radius Detection : |
|
|
Habitability by Solar Eq. Astronomical Unit: |
Habitable |
|
Habitability by Kopparapu: |
Habitable |
|
Star Name : |
HN Lib |
|
Alternate Name : |
Gliese 555 |
|
Star Distance(LY) : |
20.4 |
|
Stellar Radius(Rsun) : |
0.3 |
(Rsun Measured) |
|
Stellar Mass(Msun) : |
0.3 |
(Msun Measured) |
0.3 |
(Msun Estimated) |
|
Star Age : |
4.4 |
(GY) |
|
Temperature : |
3347 |
(K) |
|
Spectral type : |
M3.5V |
|
UV portion[%]: |
0.2 |
|
Visible portion[%]: |
11.1 |
|
IR portion[%]: |
88.6 |
|
Metalicity : |
-0.2 |
|
Absolute Magnitude: |
12.3 |
|
Apparent Magnitude: |
11.3 |
|
Right Ascension(RA) |
218.5750 |
|
Declination (DEC) |
-12.5194 |
|
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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 |
 |
 |
/
HN Lib b
HN Lib b
HN Lib b is an exoplanet orbiting the star HN Lib, located about 20.4 light-years ( 6.3 pc) away from Solar System. Its discovery was publicly announced on 2023.
The host star HN Lib has apparent magnitude of 11.3, with absolute magnitude of 12.3. It is 0.3 times more massive and 0.3 times bigger compared with our Sun. The surface temperature is 3347 with its spectral types of M3.5V
In this planetary system, the extrasolar planet HN Lib b orbits around the star HN Lib every 36.1 days with its orbital distance of 0.14 AU ( 21198018.3 km)
(Projected orbit of HN Lib b around its host star HN Lib)
The Star HN Lib 's habitable zone is located at the following distance
Inner Boundary (the orbital distance at Venus's Equivalent Radiation )
: 0.073 AU ( 10855272.4 km)
Earth Boundary (the orbital distance at Earth's Equivalent Radiation)
: 0.100 AU ( 15004823.3 km)
Outer Boundary (the orbital distance at Mars's Equivalent Radiation)
: 0.153 AU ( 22864030.1 km)
Snow Line (the orbital distance at Snow Line Equivalent Radiation)
: 0.225 AU ( 33645421.9 km)
Radiation at Planetary Boundary of HN Lib b : 685.22 W/m2
(Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HN Lib)
Kopparapu Recent Venus for Star HN Lib distance : 0.082 AU
Kopparapu Runaway Greenhouse for Earth-sized planet for Star HN Lib distance : 0.104 AU
Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HN Lib distance : 0.100 AU
Kopparapu Runaway Greenhouse for Mars-sized planet for Star HN Lib distance : 0.110 AU
Kopparapu Outer Boundary for Maximum Greenhouse for Star HN Lib distance : 0.204 AU
Kopparapu Outer Boundary for Early Mars for Star HN Lib distance : 0.215 AU
(Habitable zone calculated based on Kopparapu et al.(2013) around the star HN Lib)
Original Kopparapu Recent Venus for Star HN Lib distance : 0.082 AU
Original Kopparapu Runaway Greenhouse for Star HN Lib distance : 0.108 AU
Original Kopparapu Moist Greenhouse for Star HN Lib distance : 0.108 AU
Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HN Lib distance : 0.207 AU
Original Kopparapu Outer Boundary for Early Mars for Star HN Lib distance : 0.215 AU
(Habitable zone calculated based on Kopparapu et al.(Original) around the star HN Lib)
(Position in Stellar Map of star HN Lib and its Exoplanet HN Lib b)
(Zoomed position in Stellar Map of star HN Lib and its Exoplanet HN Lib b (zoom level 3))
(Synthetic Spectrum of star HN 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
