|
Exoplanet Name : |
GJ 1252 b |
|
Alternate Name : |
|
|
Status : |
Confirmed |
|
Radius (Rjup / Re): |
0.1053 |
(Rjup) |
1.1803 |
(Rearth) |
|
Mass (Mjup / Me): |
0.0042 |
(Mjup) |
1.3194 |
(Mearth) |
|
Semi Major Axis / Orbital Distance Calculated |
0.0092 |
(AU) |
0.0092 |
(AU Est.) |
|
Eccentricity : |
0.0000 |
|
Orbital Period(Yrs) |
0.0014 |
|
Orbital Period(Observed/Estimated) |
0.52 |
(Days Obs.) |
0.52 |
(Days Est.) |
|
Surface Gravity (G Earth) |
0.9471 |
|
Star Radiation at Atmospheric Boundary: |
319497.4 |
(W/m2) |
|
Measured Temperature (K) |
0.0 |
(K) |
|
Blackbody T 0.1(K) |
1061.1 |
(K) |
|
Blackbody T 0.3(K) |
996.5 |
(K) |
|
Blackbody T 0.7(K) |
806.3 |
(K) |
|
Tidally Locked Blackbody T 0.1(K) |
1261.9 |
(K) |
|
Tidally Locked Blackbody T 0.3(K) |
1185.0 |
(K) |
|
Size Class: |
Earth-size |
|
Mass Class: |
|
|
Detection Type : |
Primary Transit |
|
Mass Detection : |
Spectrum |
|
Radius Detection : |
Primary Transit |
|
Habitability by Solar Eq. Astronomical Unit: |
Not habitable |
|
Habitability by Kopparapu: |
Not habitable |
|
Star Name : |
GJ 1252 |
|
Alternate Name : |
|
|
Star Distance(LY) : |
66.5 |
|
Stellar Radius(Rsun) : |
0.4 |
(Rsun Measured) |
|
Stellar Mass(Msun) : |
0.4 |
(Msun Measured) |
0.4 |
(Msun Estimated) |
|
Star Age : |
0.0 |
(GY) |
|
Temperature : |
3458 |
(K) |
|
Spectral type : |
M4 |
|
UV portion[%]: |
0.2 |
|
Visible portion[%]: |
10.4 |
|
IR portion[%]: |
89.4 |
|
Metalicity : |
0.1 |
|
Absolute Magnitude: |
10.5 |
|
Apparent Magnitude: |
12.0 |
|
Right Ascension(RA) |
306.9250 |
|
Declination (DEC) |
-56.4569 |
|
Hubble Space Telescope Guide Star Catalog (GSC) ID |
|
|
Discovered by |
|
|
Discovery Paper - Authors |
|
|
Discovery Paper - Title |
|
|
Discovery Paper - Journal |
|
|
Discovery Paper - URL |
|
|
SIMBAD LINK |
http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=GJ+1252+&submit=SIMBAD+search |
|
Open Exoplanet Database Link |
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GJ 1252 b
GJ 1252 b
GJ 1252 b is an exoplanet orbiting the star GJ 1252, located about 66.5 light-years (20.4 pc) away from Solar System. Its discovery was publicly announced on 2018.
The host star GJ 1252 has apparent magnitude of 12.0, with absolute magnitude of 10.5. It is 0.4 times more massive and 0.4 times bigger compared with our Sun. The surface temperature is 3458 with its spectral types of M4
In this planetary system, the extrasolar planet GJ 1252 b orbits around the star GJ 1252 every 0.5 days with its orbital distance of 0.01 AU ( 1370316.5 km)
(Projected orbit of GJ 1252 b around its host star GJ 1252)
The Star GJ 1252 's habitable zone is located at the following distance
Inner Boundary (the orbital distance at Venus's Equivalent Radiation )
: 0.101 AU ( 15152519.4 km)
Earth Boundary (the orbital distance at Earth's Equivalent Radiation)
: 0.140 AU ( 20944741.6 km)
Outer Boundary (the orbital distance at Mars's Equivalent Radiation)
: 0.213 AU ( 31915151.1 km)
Snow Line (the orbital distance at Snow Line Equivalent Radiation)
: 0.314 AU ( 46964543.0 km)
Radiation at Planetary Boundary of GJ 1252 b : 319497.40 W/m2
(Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star GJ 1252)
Kopparapu Recent Venus for Star GJ 1252 distance : 0.115 AU
Kopparapu Runaway Greenhouse for Earth-sized planet for Star GJ 1252 distance : 0.145 AU
Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star GJ 1252 distance : 0.140 AU
Kopparapu Runaway Greenhouse for Mars-sized planet for Star GJ 1252 distance : 0.154 AU
Kopparapu Outer Boundary for Maximum Greenhouse for Star GJ 1252 distance : 0.283 AU
Kopparapu Outer Boundary for Early Mars for Star GJ 1252 distance : 0.298 AU
(Habitable zone calculated based on Kopparapu et al.(2013) around the star GJ 1252)
Original Kopparapu Recent Venus for Star GJ 1252 distance : 0.114 AU
Original Kopparapu Runaway Greenhouse for Star GJ 1252 distance : 0.150 AU
Original Kopparapu Moist Greenhouse for Star GJ 1252 distance : 0.150 AU
Original Kopparapu Outer Boundary for Maximum Greenhouse for Star GJ 1252 distance : 0.287 AU
Original Kopparapu Outer Boundary for Early Mars for Star GJ 1252 distance : 0.298 AU
(Habitable zone calculated based on Kopparapu et al.(Original) around the star GJ 1252)
(Position in Stellar Map of star GJ 1252 and its Exoplanet GJ 1252 b)
(Zoomed position in Stellar Map of star GJ 1252 and its Exoplanet GJ 1252 b (zoom level 3))
(Synthetic Spectrum of star GJ 1252*)
*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
