|
Exoplanet Name : |
Kepler-222 d |
|
Alternate Name : |
"2MASS J19113746+4656159 d, K00723.02, KIC 10002866 d, KOI-723 d, KOI-723.02, WISE J191137.46+465615.8 d" |
|
Status : |
Confirmed |
|
Radius (Rjup / Re): |
0.3290 |
(Rjup) |
3.6878 |
(Rearth) |
|
Mass (Mjup / Me): |
0.0279 |
(Mjup) |
8.8798 |
(Mearth) |
|
Semi Major Axis / Orbital Distance Calculated |
0.1800 |
(AU) |
0.1800 |
(AU Est.) |
|
Eccentricity : |
0.0000 |
|
Orbital Period(Yrs) |
0.0769 |
|
Orbital Period(Observed/Estimated) |
28.08 |
(Days Obs.) |
27.75 |
(Days Est.) |
|
Surface Gravity (G Earth) |
0.6529 |
|
Star Radiation at Atmospheric Boundary: |
20111.9 |
(W/m2) |
|
Measured Temperature (K) |
0.0 |
(K) |
|
Blackbody T 0.1(K) |
531.5 |
(K) |
|
Blackbody T 0.3(K) |
499.1 |
(K) |
|
Blackbody T 0.7(K) |
403.9 |
(K) |
|
Tidally Locked Blackbody T 0.1(K) |
632.1 |
(K) |
|
Tidally Locked Blackbody T 0.3(K) |
593.6 |
(K) |
|
Size Class: |
Neptune-size |
|
Mass Class: |
|
|
Detection Type : |
Primary Transit |
|
Mass Detection : |
|
|
Radius Detection : |
|
|
Habitability by Solar Eq. Astronomical Unit: |
Not habitable |
|
Habitability by Kopparapu: |
Not habitable |
|
Star Name : |
Kepler-222 |
|
Alternate Name : |
"2MASS J19113746+4656159, KIC 10002866, KOI-723, WISE J191137.46+465615.8" |
|
Star Distance(LY) : |
2475.2 |
|
Stellar Radius(Rsun) : |
0.8 |
(Rsun Measured) |
|
Stellar Mass(Msun) : |
1.0 |
(Msun Measured) |
1.0 |
(Msun Estimated) |
|
Star Age : |
0.0 |
(GY) |
|
Temperature : |
5315 |
(K) |
|
Spectral type : |
G7 |
|
UV portion[%]: |
5.9 |
|
Visible portion[%]: |
41.6 |
|
IR portion[%]: |
52.5 |
|
Metalicity : |
0.1 |
|
Absolute Magnitude: |
4.3 |
|
Apparent Magnitude: |
13.7 |
|
Right Ascension(RA) |
287.9061 |
|
Declination (DEC) |
46.9378 |
|
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=Kepler-222+&submit=SIMBAD+search |
|
Open Exoplanet Database Link |
http://www.openexoplanetcatalogue.com/planet/Kepler-222%20d/ |
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Kepler-222 d
Kepler-222 d
Kepler-222 d is an exoplanet orbiting the star Kepler-222, located about 2475.2 light-years (758.9 pc) away from Solar System. Its discovery was publicly announced on 2014.
The host star Kepler-222 has apparent magnitude of 13.7, with absolute magnitude of 4.3. It is 1.0 times more massive and 0.8 times bigger compared with our Sun. The surface temperature is 5315 with its spectral types of G7
In this planetary system, the extrasolar planet Kepler-222 d orbits around the star Kepler-222 every 28.1 days with its orbital distance of 0.18 AU ( 26927616.7 km)
(Projected orbit of Kepler-222 d around its host star Kepler-222)
The Star Kepler-222 's habitable zone is located at the following distance
Inner Boundary (the orbital distance at Venus's Equivalent Radiation )
: 0.499 AU ( 74705884.0 km)
Earth Boundary (the orbital distance at Earth's Equivalent Radiation)
: 0.690 AU ( 103263054.6 km)
Outer Boundary (the orbital distance at Mars's Equivalent Radiation)
: 1.052 AU ( 157350043.2 km)
Snow Line (the orbital distance at Snow Line Equivalent Radiation)
: 1.548 AU ( 231547481.6 km)
Radiation at Planetary Boundary of Kepler-222 d : 20111.90 W/m2
(Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-222)
Kopparapu Recent Venus for Star Kepler-222 distance : 0.532 AU
Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-222 distance : 0.673 AU
Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-222 distance : 0.650 AU
Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-222 distance : 0.713 AU
Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-222 distance : 1.206 AU
Kopparapu Outer Boundary for Early Mars for Star Kepler-222 distance : 1.272 AU
(Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-222)
Original Kopparapu Recent Venus for Star Kepler-222 distance : 0.528 AU
Original Kopparapu Runaway Greenhouse for Star Kepler-222 distance : 0.693 AU
Original Kopparapu Moist Greenhouse for Star Kepler-222 distance : 0.699 AU
Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-222 distance : 1.226 AU
Original Kopparapu Outer Boundary for Early Mars for Star Kepler-222 distance : 1.275 AU
(Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-222)
(Position in Stellar Map of star Kepler-222 and its Exoplanet Kepler-222 d)
(Zoomed position in Stellar Map of star Kepler-222 and its Exoplanet Kepler-222 d (zoom level 3))
(Synthetic Spectrum of star Kepler-222*)
*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
