|
Exoplanet Name : |
GJ 229 A b |
|
Alternate Name : |
|
|
Status : |
Confirmed |
|
Radius (Rjup / Re): |
0.1967 |
(Rjup) |
2.2045 |
(Rearth) |
|
Mass (Mjup / Me): |
0.0315 |
(Mjup) |
10.0246 |
(Mearth) |
|
Semi Major Axis / Orbital Distance Calculated |
0.8960 |
(AU) |
0.8960 |
(AU Est.) |
|
Eccentricity : |
0.1700 |
|
Orbital Period(Yrs) |
1.4325 |
|
Orbital Period(Observed/Estimated) |
523.24 |
(Days Obs.) |
406.76 |
(Days Est.) |
|
Surface Gravity (G Earth) |
2.0627 |
|
Star Radiation at Atmospheric Boundary: |
68.0 |
(W/m2) |
|
Measured Temperature (K) |
0.0 |
(K) |
|
Blackbody T 0.1(K) |
128.2 |
(K) |
|
Blackbody T 0.3(K) |
120.4 |
(K) |
|
Blackbody T 0.7(K) |
97.4 |
(K) |
|
Tidally Locked Blackbody T 0.1(K) |
152.4 |
(K) |
|
Tidally Locked Blackbody T 0.3(K) |
143.1 |
(K) |
|
Size Class: |
sub-Neptune-size |
|
Mass Class: |
|
|
Detection Type : |
Radial Velocity |
|
Mass Detection : |
Spectrum |
|
Radius Detection : |
|
|
Habitability by Solar Eq. Astronomical Unit: |
Not habitable |
|
Habitability by Kopparapu: |
Not habitable |
|
Star Name : |
GJ 229 |
|
Alternate Name : |
|
|
Star Distance(LY) : |
18.8 |
|
Stellar Radius(Rsun) : |
0.5 |
(Rsun Estimated) |
|
Stellar Mass(Msun) : |
0.6 |
(Msun Measured) |
0.4 |
(Msun Estimated) |
|
Star Age : |
0.0 |
(GY) |
|
Temperature : |
3564 |
(K) |
|
Spectral type : |
M1 V |
|
UV portion[%]: |
0.3 |
|
Visible portion[%]: |
15.9 |
|
IR portion[%]: |
83.7 |
|
Metalicity : |
0.0 |
|
Absolute Magnitude: |
9.3 |
|
Apparent Magnitude: |
8.1 |
|
Right Ascension(RA) |
92.6442 |
|
Declination (DEC) |
-21.8646 |
|
Hubble Space Telescope Guide Star Catalog (GSC) ID |
05945-00765 |
|
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+229&submit=SIMBAD+search |
|
Open Exoplanet Database Link |
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GJ 229 A b
GJ 229 A b
GJ 229 A b is an exoplanet orbiting the star GJ 229, located about 18.8 light-years ( 5.8 pc) away from Solar System. Its discovery was publicly announced on 2014.
The host star GJ 229 has apparent magnitude of 8.1, with absolute magnitude of 9.3. It is 0.6 times more massive and 0.5 times bigger compared with our Sun. The surface temperature is 3564 with its spectral types of M1 V
In this planetary system, the extrasolar planet GJ 229 A b orbits around the star GJ 229 every 523.2 days with its orbital distance of 0.90 AU ( 134039692.1 km)
(Projected orbit of GJ 229 A b around its host star GJ 229)
The Star GJ 229 's habitable zone is located at the following distance
Inner Boundary (the orbital distance at Venus's Equivalent Radiation )
: 0.145 AU ( 21619794.2 km)
Earth Boundary (the orbital distance at Earth's Equivalent Radiation)
: 0.200 AU ( 29884205.5 km)
Outer Boundary (the orbital distance at Mars's Equivalent Radiation)
: 0.304 AU ( 45536915.8 km)
Snow Line (the orbital distance at Snow Line Equivalent Radiation)
: 0.448 AU ( 67009566.4 km)
Radiation at Planetary Boundary of GJ 229 A b : 67.98 W/m2
(Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star GJ 229)
Kopparapu Recent Venus for Star GJ 229 distance : 0.163 AU
Kopparapu Runaway Greenhouse for Earth-sized planet for Star GJ 229 distance : 0.206 AU
Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star GJ 229 distance : 0.199 AU
Kopparapu Runaway Greenhouse for Mars-sized planet for Star GJ 229 distance : 0.219 AU
Kopparapu Outer Boundary for Maximum Greenhouse for Star GJ 229 distance : 0.400 AU
Kopparapu Outer Boundary for Early Mars for Star GJ 229 distance : 0.423 AU
(Habitable zone calculated based on Kopparapu et al.(2013) around the star GJ 229)
Original Kopparapu Recent Venus for Star GJ 229 distance : 0.162 AU
Original Kopparapu Runaway Greenhouse for Star GJ 229 distance : 0.214 AU
Original Kopparapu Moist Greenhouse for Star GJ 229 distance : 0.214 AU
Original Kopparapu Outer Boundary for Maximum Greenhouse for Star GJ 229 distance : 0.407 AU
Original Kopparapu Outer Boundary for Early Mars for Star GJ 229 distance : 0.423 AU
(Habitable zone calculated based on Kopparapu et al.(Original) around the star GJ 229)
(Position in Stellar Map of star GJ 229 and its Exoplanet GJ 229 A b)
(Zoomed position in Stellar Map of star GJ 229 and its Exoplanet GJ 229 A b (zoom level 3))
(Synthetic Spectrum of star GJ 229*)
*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
