|
Exoplanet Name : |
HD 4308 b |
|
Alternate Name : |
|
|
Status : |
Confirmed |
|
Radius (Rjup / Re): |
0.2083 |
(Rjup) |
2.3352 |
(Rearth) |
|
Mass (Mjup / Me): |
0.0405 |
(Mjup) |
12.8765 |
(Mearth) |
|
Semi Major Axis / Orbital Distance Calculated |
0.1180 |
(AU) |
0.1180 |
(AU Est.) |
|
Eccentricity : |
0.2700 |
|
Orbital Period(Yrs) |
0.0427 |
|
Orbital Period(Observed/Estimated) |
15.61 |
(Days Obs.) |
16.06 |
(Days Est.) |
|
Surface Gravity (G Earth) |
2.3613 |
|
Star Radiation at Atmospheric Boundary: |
73153.9 |
(W/m2) |
|
Measured Temperature (K) |
0.0 |
(K) |
|
Blackbody T 0.1(K) |
734.0 |
(K) |
|
Blackbody T 0.3(K) |
689.3 |
(K) |
|
Blackbody T 0.7(K) |
557.7 |
(K) |
|
Tidally Locked Blackbody T 0.1(K) |
872.9 |
(K) |
|
Tidally Locked Blackbody T 0.3(K) |
819.7 |
(K) |
|
Size Class: |
sub-Neptune-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 : |
HD 4308 |
|
Alternate Name : |
|
|
Star Distance(LY) : |
71.8 |
|
Stellar Radius(Rsun) : |
0.9 |
(Rsun Measured) |
|
Stellar Mass(Msun) : |
0.8 |
(Msun Measured) |
0.9 |
(Msun Estimated) |
|
Star Age : |
7.1 |
(GY) |
|
Temperature : |
5597 |
(K) |
|
Spectral type : |
G5 V |
|
UV portion[%]: |
7.3 |
|
Visible portion[%]: |
43.8 |
|
IR portion[%]: |
48.9 |
|
Metalicity : |
-0.3 |
|
Absolute Magnitude: |
4.8 |
|
Apparent Magnitude: |
6.5 |
|
Right Ascension(RA) |
11.1636 |
|
Declination (DEC) |
-65.6494 |
|
Hubble Space Telescope Guide Star Catalog (GSC) ID |
|
|
Discovered by |
|
|
Discovery Paper - Authors |
0 |
|
Discovery Paper - Title |
|
|
Discovery Paper - Journal |
0 |
|
Discovery Paper - URL |
0 |
|
SIMBAD LINK |
http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+4308+&submit=SIMBAD+search |
|
Open Exoplanet Database Link |
http://www.openexoplanetcatalogue.com/planet/HD%204308%20b/ |
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HD 4308 b
HD 4308 b
HD 4308 b is an exoplanet orbiting the star HD 4308, located about 71.8 light-years (22.0 pc) away from Solar System. Its discovery was publicly announced on 2005.
The host star HD 4308 has apparent magnitude of 6.5, with absolute magnitude of 4.8. It is 0.8 times more massive and 0.9 times bigger compared with our Sun. The surface temperature is 5597 with its spectral types of G5 V
In this planetary system, the extrasolar planet HD 4308 b orbits around the star HD 4308 every 15.6 days with its orbital distance of 0.12 AU ( 17652548.7 km)
(Projected orbit of HD 4308 b around its host star HD 4308)
The Star HD 4308 's habitable zone is located at the following distance
Inner Boundary (the orbital distance at Venus's Equivalent Radiation )
: 0.624 AU ( 93402081.3 km)
Earth Boundary (the orbital distance at Earth's Equivalent Radiation)
: 0.863 AU ( 129106085.2 km)
Outer Boundary (the orbital distance at Mars's Equivalent Radiation)
: 1.315 AU ( 196729102.7 km)
Snow Line (the orbital distance at Snow Line Equivalent Radiation)
: 1.935 AU ( 289495492.8 km)
Radiation at Planetary Boundary of HD 4308 b : 73153.93 W/m2
(Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 4308)
Kopparapu Recent Venus for Star HD 4308 distance : 0.654 AU
Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 4308 distance : 0.828 AU
Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 4308 distance : 0.800 AU
Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 4308 distance : 0.877 AU
Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 4308 distance : 1.470 AU
Kopparapu Outer Boundary for Early Mars for Star HD 4308 distance : 1.551 AU
(Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 4308)
Original Kopparapu Recent Venus for Star HD 4308 distance : 0.653 AU
Original Kopparapu Runaway Greenhouse for Star HD 4308 distance : 0.852 AU
Original Kopparapu Moist Greenhouse for Star HD 4308 distance : 0.864 AU
Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 4308 distance : 1.496 AU
Original Kopparapu Outer Boundary for Early Mars for Star HD 4308 distance : 1.556 AU
(Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 4308)
(Position in Stellar Map of star HD 4308 and its Exoplanet HD 4308 b)
(Zoomed position in Stellar Map of star HD 4308 and its Exoplanet HD 4308 b (zoom level 3))
(Synthetic Spectrum of star HD 4308*)
*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
