|
Exoplanet Name : |
Kepler-421 b |
|
Alternate Name : |
"2MASS J18530163+4505159 b, K01274.01, KIC 8800954 b, KOI-1274 b, KOI-1274.01, WISE J185301.62+450515.7 b" |
|
Status : |
Confirmed |
|
Radius (Rjup / Re): |
0.3710 |
(Rjup) |
4.1585 |
(Rearth) |
|
Mass (Mjup / Me): |
0.0501 |
(Mjup) |
15.9145 |
(Mearth) |
|
Semi Major Axis / Orbital Distance Calculated |
1.2190 |
(AU) |
1.2190 |
(AU Est.) |
|
Eccentricity : |
0.0410 |
|
Orbital Period(Yrs) |
1.9279 |
|
Orbital Period(Observed/Estimated) |
704.20 |
(Days Obs.) |
553.07 |
(Days Est.) |
|
Surface Gravity (G Earth) |
0.9203 |
|
Star Radiation at Atmospheric Boundary: |
427.5 |
(W/m2) |
|
Measured Temperature (K) |
0.0 |
(K) |
|
Blackbody T 0.1(K) |
202.9 |
(K) |
|
Blackbody T 0.3(K) |
190.6 |
(K) |
|
Blackbody T 0.7(K) |
154.2 |
(K) |
|
Tidally Locked Blackbody T 0.1(K) |
241.3 |
(K) |
|
Tidally Locked Blackbody T 0.3(K) |
226.6 |
(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-421 |
|
Alternate Name : |
"KOI-1274, 2MASS J18530163+4505159, KIC 8800954, WISE J185301.62+450515.7" |
|
Star Distance(LY) : |
1136.5 |
|
Stellar Radius(Rsun) : |
0.8 |
(Rsun Measured) |
|
Stellar Mass(Msun) : |
0.8 |
(Msun Measured) |
0.5 |
(Msun Estimated) |
|
Star Age : |
4.0 |
(GY) |
|
Temperature : |
5224 |
(K) |
|
Spectral type : |
G9/K0 |
|
UV portion[%]: |
5.2 |
|
Visible portion[%]: |
40.5 |
|
IR portion[%]: |
54.3 |
|
Metalicity : |
-0.2 |
|
Absolute Magnitude: |
4.3 |
|
Apparent Magnitude: |
12.0 |
|
Right Ascension(RA) |
283.2568 |
|
Declination (DEC) |
45.0878 |
|
Hubble Space Telescope Guide Star Catalog (GSC) ID |
|
|
Discovered by |
|
|
Discovery Paper - Authors |
"David M. Kipping, Guillermo Torres, Lars A. Buchhave, Scott J. Kenyon, Christopher E. Henze, Howard Isaacson, Rea Kolbl, Geoff W. Marcy, Stephen T. Bryson, Keivan G. Stassun, Fabienne A. Bastien" |
|
Discovery Paper - Title |
Discovery of a Transiting Planet Near the Snow-Line |
|
Discovery Paper - Journal |
0 |
|
Discovery Paper - URL |
0 |
|
SIMBAD LINK |
http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Kepler-421+&submit=SIMBAD+search |
|
Open Exoplanet Database Link |
http://www.openexoplanetcatalogue.com/planet/Kepler-421%20b/ |
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Kepler-421 b
Kepler-421 b
Kepler-421 b is an exoplanet orbiting the star Kepler-421, located about 1136.5 light-years (348.5 pc) away from Solar System. Its discovery was publicly announced on 2014.
The host star Kepler-421 has apparent magnitude of 12.0, with absolute magnitude of 4.3. It is 0.8 times more massive and 0.8 times bigger compared with our Sun. The surface temperature is 5224 with its spectral types of G9/K0
In this planetary system, the extrasolar planet Kepler-421 b orbits around the star Kepler-421 every 704.2 days with its orbital distance of 1.22 AU ( 182359804.4 km)
(Projected orbit of Kepler-421 b around its host star Kepler-421)
The Star Kepler-421 's habitable zone is located at the following distance
Inner Boundary (the orbital distance at Venus's Equivalent Radiation )
: 0.493 AU ( 73761629.0 km)
Earth Boundary (the orbital distance at Earth's Equivalent Radiation)
: 0.682 AU ( 101957847.6 km)
Outer Boundary (the orbital distance at Mars's Equivalent Radiation)
: 1.039 AU ( 155361196.4 km)
Snow Line (the orbital distance at Snow Line Equivalent Radiation)
: 1.528 AU ( 228620806.5 km)
Radiation at Planetary Boundary of Kepler-421 b : 427.51 W/m2
(Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-421)
Kopparapu Recent Venus for Star Kepler-421 distance : 0.527 AU
Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-421 distance : 0.668 AU
Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-421 distance : 0.645 AU
Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-421 distance : 0.708 AU
Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-421 distance : 1.200 AU
Kopparapu Outer Boundary for Early Mars for Star Kepler-421 distance : 1.266 AU
(Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-421)
Original Kopparapu Recent Venus for Star Kepler-421 distance : 0.523 AU
Original Kopparapu Runaway Greenhouse for Star Kepler-421 distance : 0.688 AU
Original Kopparapu Moist Greenhouse for Star Kepler-421 distance : 0.692 AU
Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-421 distance : 1.220 AU
Original Kopparapu Outer Boundary for Early Mars for Star Kepler-421 distance : 1.269 AU
(Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-421)
(Position in Stellar Map of star Kepler-421 and its Exoplanet Kepler-421 b)
(Zoomed position in Stellar Map of star Kepler-421 and its Exoplanet Kepler-421 b (zoom level 3))
(Synthetic Spectrum of star Kepler-421*)
*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
