|
Exoplanet Name : |
GJ 317 b |
|
Alternate Name : |
|
|
Status : |
Confirmed |
|
Radius (Rjup / Re): |
0.9078 |
(Rjup) |
10.1759 |
(Rearth) |
|
Mass (Mjup / Me): |
1.7528 |
(Mjup) |
557.2817 |
(Mearth) |
|
Semi Major Axis / Orbital Distance Calculated |
1.1510 |
(AU) |
1.1510 |
(AU Est.) |
|
Eccentricity : |
0.0700 |
|
Orbital Period(Yrs) |
1.9046 |
|
Orbital Period(Observed/Estimated) |
695.66 |
(Days Obs.) |
695.95 |
(Days Est.) |
|
Surface Gravity (G Earth) |
5.3819 |
|
Star Radiation at Atmospheric Boundary: |
24.0 |
(W/m2) |
|
Measured Temperature (K) |
0.0 |
(K) |
|
Blackbody T 0.1(K) |
98.7 |
(K) |
|
Blackbody T 0.3(K) |
92.7 |
(K) |
|
Blackbody T 0.7(K) |
75.0 |
(K) |
|
Tidally Locked Blackbody T 0.1(K) |
117.4 |
(K) |
|
Tidally Locked Blackbody T 0.3(K) |
110.3 |
(K) |
|
Size Class: |
Jupiter-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 : |
GJ 317 |
|
Alternate Name : |
|
|
Star Distance(LY) : |
49.9 |
|
Stellar Radius(Rsun) : |
0.4 |
(Rsun Estimated) |
|
Stellar Mass(Msun) : |
0.4 |
(Msun Measured) |
0.4 |
(Msun Estimated) |
|
Star Age : |
0.0 |
(GY) |
|
Temperature : |
3510 |
(K) |
|
Spectral type : |
M3.5 |
|
UV portion[%]: |
0.2 |
|
Visible portion[%]: |
10.4 |
|
IR portion[%]: |
89.3 |
|
Metalicity : |
0.4 |
|
Absolute Magnitude: |
11.1 |
|
Apparent Magnitude: |
12.0 |
|
Right Ascension(RA) |
130.2468 |
|
Declination (DEC) |
-23.4564 |
|
Hubble Space Telescope Guide Star Catalog (GSC) ID |
|
|
Discovered by |
|
|
Discovery Paper - Authors |
0 |
|
Discovery Paper - Title |
0 |
|
Discovery Paper - Journal |
0 |
|
Discovery Paper - URL |
0 |
|
SIMBAD LINK |
http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=GJ+317+&submit=SIMBAD+search |
|
Open Exoplanet Database Link |
0 |
 |
 |
 |
 |
/
GJ 317 b
GJ 317 b
GJ 317 b is an exoplanet orbiting the star GJ 317, located about 49.9 light-years (15.3 pc) away from Solar System. Its discovery was publicly announced on 2007.
The host star GJ 317 has apparent magnitude of 12.0, with absolute magnitude of 11.1. It is 0.4 times more massive and 0.4 times bigger compared with our Sun. The surface temperature is 3510 with its spectral types of M3.5
In this planetary system, the extrasolar planet GJ 317 b orbits around the star GJ 317 every 695.7 days with its orbital distance of 1.15 AU ( 172187149.2 km)
(Projected orbit of GJ 317 b around its host star GJ 317)
The Star GJ 317 's habitable zone is located at the following distance
Inner Boundary (the orbital distance at Venus's Equivalent Radiation )
: 0.110 AU ( 16485882.6 km)
Earth Boundary (the orbital distance at Earth's Equivalent Radiation)
: 0.152 AU ( 22787798.0 km)
Outer Boundary (the orbital distance at Mars's Equivalent Radiation)
: 0.232 AU ( 34723561.3 km)
Snow Line (the orbital distance at Snow Line Equivalent Radiation)
: 0.342 AU ( 51097241.5 km)
Radiation at Planetary Boundary of GJ 317 b : 23.95 W/m2
(Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star GJ 317)
Kopparapu Recent Venus for Star GJ 317 distance : 0.124 AU
Kopparapu Runaway Greenhouse for Earth-sized planet for Star GJ 317 distance : 0.158 AU
Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star GJ 317 distance : 0.152 AU
Kopparapu Runaway Greenhouse for Mars-sized planet for Star GJ 317 distance : 0.167 AU
Kopparapu Outer Boundary for Maximum Greenhouse for Star GJ 317 distance : 0.306 AU
Kopparapu Outer Boundary for Early Mars for Star GJ 317 distance : 0.323 AU
(Habitable zone calculated based on Kopparapu et al.(2013) around the star GJ 317)
Original Kopparapu Recent Venus for Star GJ 317 distance : 0.123 AU
Original Kopparapu Runaway Greenhouse for Star GJ 317 distance : 0.163 AU
Original Kopparapu Moist Greenhouse for Star GJ 317 distance : 0.163 AU
Original Kopparapu Outer Boundary for Maximum Greenhouse for Star GJ 317 distance : 0.311 AU
Original Kopparapu Outer Boundary for Early Mars for Star GJ 317 distance : 0.324 AU
(Habitable zone calculated based on Kopparapu et al.(Original) around the star GJ 317)
(Position in Stellar Map of star GJ 317 and its Exoplanet GJ 317 b)
(Zoomed position in Stellar Map of star GJ 317 and its Exoplanet GJ 317 b (zoom level 3))
(Synthetic Spectrum of star GJ 317*)
*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
