|
Exoplanet Name : |
Kepler-1257 b |
|
Alternate Name : |
"2MASS J19441816+4537374 b, K02491.01, KIC 9229657 b, KOI-2491 b, KOI-2491.01, WISE J194418.15+453737.2 b" |
|
Status : |
Confirmed |
|
Radius (Rjup / Re): |
0.1360 |
(Rjup) |
1.5244 |
(Rearth) |
|
Mass (Mjup / Me): |
0.0142 |
(Mjup) |
4.5162 |
(Mearth) |
|
Semi Major Axis / Orbital Distance Calculated |
0.0000 |
(AU) |
0.0364 |
(AU Est.) |
|
Eccentricity : |
0.0000 |
|
Orbital Period(Yrs) |
0.0073 |
|
Orbital Period(Observed/Estimated) |
2.67 |
(Days Obs.) |
0.00 |
(Days Est.) |
|
Surface Gravity (G Earth) |
1.9434 |
|
Star Radiation at Atmospheric Boundary: |
799660.2 |
(W/m2) |
|
Measured Temperature (K) |
0.0 |
(K) |
|
Blackbody T 0.1(K) |
1334.7 |
(K) |
|
Blackbody T 0.3(K) |
1253.4 |
(K) |
|
Blackbody T 0.7(K) |
1014.1 |
(K) |
|
Tidally Locked Blackbody T 0.1(K) |
1587.2 |
(K) |
|
Tidally Locked Blackbody T 0.3(K) |
1490.5 |
(K) |
|
Size Class: |
super-Earth-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-1257 |
|
Alternate Name : |
"2MASS J19441816+4537374, KIC 9229657, KOI-2491, WISE J194418.15+453737.2" |
|
Star Distance(LY) : |
3613.2 |
|
Stellar Radius(Rsun) : |
0.9 |
(Rsun Measured) |
|
Stellar Mass(Msun) : |
0.9 |
(Msun Measured) |
0.9 |
(Msun Estimated) |
|
Star Age : |
4.4 |
(GY) |
|
Temperature : |
5822 |
(K) |
|
Spectral type : |
G7 |
|
UV portion[%]: |
0.3 |
|
Visible portion[%]: |
1.5 |
|
IR portion[%]: |
98.2 |
|
Metalicity : |
-0.1 |
|
Absolute Magnitude: |
4.1 |
|
Apparent Magnitude: |
14.3 |
|
Right Ascension(RA) |
296.0757 |
|
Declination (DEC) |
45.6271 |
|
Hubble Space Telescope Guide Star Catalog (GSC) ID |
|
|
Discovered by |
|
|
Discovery Paper - Authors |
"Timothy D. Morton1, Stephen T. Bryson2, Jeffrey L. Coughlin2,3, Jason F. Rowe4, Ganesh Ravichandran5, Erik A. Petigura6,7, Michael R. Haas2, and Natalie M. Batalha16" |
|
Discovery Paper - Title |
FALSE POSITIVE PROBABILITIES FOR ALL KEPLER OBJECTS OF INTEREST: 1284 NEWLY VALIDATED PLANETS AND 450 LIKELY FALSE POSITIVES |
|
Discovery Paper - Journal |
0 |
|
Discovery Paper - URL |
0 |
|
SIMBAD LINK |
http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Kepler-1257+&submit=SIMBAD+search |
|
Open Exoplanet Database Link |
http://www.openexoplanetcatalogue.com/planet/Kepler-1257%20b/ |
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Kepler-1257 b
Kepler-1257 b
Kepler-1257 b is an exoplanet orbiting the star Kepler-1257, located about 3613.2 light-years (1107.8 pc) away from Solar System. Its discovery was publicly announced on 2016.
The host star Kepler-1257 has apparent magnitude of 14.3, with absolute magnitude of 4.1. It is 0.9 times more massive and 0.9 times bigger compared with our Sun. The surface temperature is 5822 with its spectral types of G7
In this planetary system, the extrasolar planet Kepler-1257 b orbits around the star Kepler-1257 every 2.7 days with its orbital distance of 0.04 AU ( 5437977.0 km)
(Projected orbit of Kepler-1257 b around its host star Kepler-1257)
The Star Kepler-1257 's habitable zone is located at the following distance
Inner Boundary (the orbital distance at Venus's Equivalent Radiation )
: 0.636 AU ( 95130637.4 km)
Earth Boundary (the orbital distance at Earth's Equivalent Radiation)
: 0.879 AU ( 131495401.5 km)
Outer Boundary (the orbital distance at Mars's Equivalent Radiation)
: 1.339 AU ( 200369892.0 km)
Snow Line (the orbital distance at Snow Line Equivalent Radiation)
: 1.971 AU ( 294853073.8 km)
Radiation at Planetary Boundary of Kepler-1257 b : 799660.23 W/m2
(Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-1257)
Kopparapu Recent Venus for Star Kepler-1257 distance : 0.657 AU
Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-1257 distance : 0.832 AU
Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-1257 distance : 0.804 AU
Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-1257 distance : 0.881 AU
Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1257 distance : 1.468 AU
Kopparapu Outer Boundary for Early Mars for Star Kepler-1257 distance : 1.549 AU
(Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-1257)
Original Kopparapu Recent Venus for Star Kepler-1257 distance : 0.659 AU
Original Kopparapu Runaway Greenhouse for Star Kepler-1257 distance : 0.855 AU
Original Kopparapu Moist Greenhouse for Star Kepler-1257 distance : 0.872 AU
Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1257 distance : 1.494 AU
Original Kopparapu Outer Boundary for Early Mars for Star Kepler-1257 distance : 1.554 AU
(Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-1257)
(Position in Stellar Map of star Kepler-1257 and its Exoplanet Kepler-1257 b)
(Zoomed position in Stellar Map of star Kepler-1257 and its Exoplanet Kepler-1257 b (zoom level 3))
(Synthetic Spectrum of star Kepler-1257*)
*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
