|
Exoplanet Name : |
Kepler-442 b |
|
Alternate Name : |
"2MASS J19012797+3916482 b, K04742.01, KIC 4138008 b, KOI-4742 b, KOI-4742.01, WISE J190127.98+391648.2 b" |
|
Status : |
Confirmed |
|
Radius (Rjup / Re): |
0.1200 |
(Rjup) |
1.3451 |
(Rearth) |
|
Mass (Mjup / Me): |
0.0090 |
(Mjup) |
2.8559 |
(Mearth) |
|
Semi Major Axis / Orbital Distance Calculated |
0.4090 |
(AU) |
0.4090 |
(AU Est.) |
|
Eccentricity : |
0.0400 |
|
Orbital Period(Yrs) |
0.3075 |
|
Orbital Period(Observed/Estimated) |
112.31 |
(Days Obs.) |
122.32 |
(Days Est.) |
|
Surface Gravity (G Earth) |
1.5785 |
|
Star Radiation at Atmospheric Boundary: |
1117.0 |
(W/m2) |
|
Measured Temperature (K) |
0.0 |
(K) |
|
Blackbody T 0.1(K) |
258.0 |
(K) |
|
Blackbody T 0.3(K) |
242.3 |
(K) |
|
Blackbody T 0.7(K) |
196.1 |
(K) |
|
Tidally Locked Blackbody T 0.1(K) |
306.8 |
(K) |
|
Tidally Locked Blackbody T 0.3(K) |
288.2 |
(K) |
|
Size Class: |
super-Earth-size |
|
Mass Class: |
|
|
Detection Type : |
Primary Transit |
|
Mass Detection : |
|
|
Radius Detection : |
Primary Transit |
|
Habitability by Solar Eq. Astronomical Unit: |
Habitable |
|
Habitability by Kopparapu: |
Habitable |
|
Star Name : |
Kepler-442 |
|
Alternate Name : |
"2MASS J19012797+3916482, KIC 4138008, KOI-4742, WISE J190127.98+391648.2" |
|
Star Distance(LY) : |
1193.3 |
|
Stellar Radius(Rsun) : |
0.6 |
(Rsun Measured) |
|
Stellar Mass(Msun) : |
0.6 |
(Msun Measured) |
0.7 |
(Msun Estimated) |
|
Star Age : |
2.9 |
(GY) |
|
Temperature : |
4402 |
(K) |
|
Spectral type : |
K5 |
|
UV portion[%]: |
1.3 |
|
Visible portion[%]: |
29.4 |
|
IR portion[%]: |
69.4 |
|
Metalicity : |
-0.4 |
|
Absolute Magnitude: |
7.5 |
|
Apparent Magnitude: |
15.3 |
|
Right Ascension(RA) |
285.3666 |
|
Declination (DEC) |
39.2801 |
|
Hubble Space Telescope Guide Star Catalog (GSC) ID |
|
|
Discovered by |
|
|
Discovery Paper - Authors |
"Guillermo Torres, David M. Kipping, Francois Fressin, Douglas A. Caldwell, Joseph D. Twicken, Sarah Ballard, Natalie M. Batalha, Stephen T. Bryson, David R. Ciardi, Christopher E. Henze, Steve B. Howell, Howard T. Isaacson, Jon M. Jenkins, Philip S. Muirhead, Elisabeth R. Newton, Erik A. Petigura, Thomas Barclay, William J. Borucki, Justin R. Crepp, Mark E. Everett, Elliott P. Horch, Andrew W. Howard, Rea Kolbl, Geoffrey W. Marcy, Sean McCauliff, Elisa V. Quintana" |
|
Discovery Paper - Title |
Validation of Twelve Small Kepler Transiting Planets in the Habitable Zone |
|
Discovery Paper - Journal |
0 |
|
Discovery Paper - URL |
0 |
|
SIMBAD LINK |
http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Kepler-442+&submit=SIMBAD+search |
|
Open Exoplanet Database Link |
http://www.openexoplanetcatalogue.com/planet/Kepler-442%20b/ |
 |
 |
 |
 |
/
Kepler-442 b
Kepler-442 b
Kepler-442 b is an exoplanet orbiting the star Kepler-442, located about 1193.3 light-years (365.9 pc) away from Solar System. Its discovery was publicly announced on 2015.
The host star Kepler-442 has apparent magnitude of 15.3, with absolute magnitude of 7.5. It is 0.6 times more massive and 0.6 times bigger compared with our Sun. The surface temperature is 4402 with its spectral types of K5
In this planetary system, the extrasolar planet Kepler-442 b orbits around the star Kepler-442 every 112.3 days with its orbital distance of 0.41 AU ( 61185529.1 km)
(Projected orbit of Kepler-442 b around its host star Kepler-442)
The Star Kepler-442 's habitable zone is located at the following distance
Inner Boundary (the orbital distance at Venus's Equivalent Radiation )
: 0.267 AU ( 40003466.0 km)
Earth Boundary (the orbital distance at Earth's Equivalent Radiation)
: 0.370 AU ( 55295244.2 km)
Outer Boundary (the orbital distance at Mars's Equivalent Radiation)
: 0.563 AU ( 84257715.3 km)
Snow Line (the orbital distance at Snow Line Equivalent Radiation)
: 0.829 AU ( 123988919.1 km)
Radiation at Planetary Boundary of Kepler-442 b : 1116.96 W/m2
(Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-442)
Kopparapu Recent Venus for Star Kepler-442 distance : 0.296 AU
Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-442 distance : 0.375 AU
Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-442 distance : 0.362 AU
Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-442 distance : 0.398 AU
Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-442 distance : 0.698 AU
Kopparapu Outer Boundary for Early Mars for Star Kepler-442 distance : 0.736 AU
(Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-442)
Original Kopparapu Recent Venus for Star Kepler-442 distance : 0.292 AU
Original Kopparapu Runaway Greenhouse for Star Kepler-442 distance : 0.387 AU
Original Kopparapu Moist Greenhouse for Star Kepler-442 distance : 0.387 AU
Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-442 distance : 0.709 AU
Original Kopparapu Outer Boundary for Early Mars for Star Kepler-442 distance : 0.738 AU
(Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-442)
(Position in Stellar Map of star Kepler-442 and its Exoplanet Kepler-442 b)
(Zoomed position in Stellar Map of star Kepler-442 and its Exoplanet Kepler-442 b (zoom level 3))
(Synthetic Spectrum of star Kepler-442*)
*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
