|
Exoplanet Name : |
Kepler-457 b |
|
Alternate Name : |
"WISE J184930.60+444140.4 b, 2MASS J18493060+4441405 b, KIC 8540376 b" |
|
Status : |
Confirmed |
|
Radius (Rjup / Re): |
0.2100 |
(Rjup) |
2.3539 |
(Rearth) |
|
Mass (Mjup / Me): |
0.0184 |
(Mjup) |
5.8489 |
(Mearth) |
|
Semi Major Axis / Orbital Distance Calculated |
0.1610 |
(AU) |
0.1610 |
(AU Est.) |
|
Eccentricity : |
0.0000 |
|
Orbital Period(Yrs) |
0.0871 |
|
Orbital Period(Observed/Estimated) |
31.81 |
(Days Obs.) |
23.14 |
(Days Est.) |
|
Surface Gravity (G Earth) |
1.0556 |
|
Star Radiation at Atmospheric Boundary: |
116361.8 |
(W/m2) |
|
Measured Temperature (K) |
0.0 |
(K) |
|
Blackbody T 0.1(K) |
824.3 |
(K) |
|
Blackbody T 0.3(K) |
774.1 |
(K) |
|
Blackbody T 0.7(K) |
626.3 |
(K) |
|
Tidally Locked Blackbody T 0.1(K) |
980.3 |
(K) |
|
Tidally Locked Blackbody T 0.3(K) |
920.6 |
(K) |
|
Size Class: |
sub-Neptune-size |
|
Mass Class: |
|
|
Detection Type : |
Primary Transit |
|
Mass Detection : |
|
|
Radius Detection : |
Primary Transit |
|
Habitability by Solar Eq. Astronomical Unit: |
Not habitable |
|
Habitability by Kopparapu: |
Not habitable |
|
Star Name : |
Kepler-457 |
|
Alternate Name : |
"KIC 8540376 , 2MASS J18493060+4441405 , WISE J184930.60+444140.4" |
|
Star Distance(LY) : |
3496.8 |
|
Stellar Radius(Rsun) : |
1.2 |
(Rsun Measured) |
|
Stellar Mass(Msun) : |
1.0 |
(Msun Measured) |
0.6 |
(Msun Estimated) |
|
Star Age : |
0.0 |
(GY) |
|
Temperature : |
6472 |
(K) |
|
Spectral type : |
F7 |
|
UV portion[%]: |
7.8 |
|
Visible portion[%]: |
44.8 |
|
IR portion[%]: |
47.4 |
|
Metalicity : |
-0.2 |
|
Absolute Magnitude: |
3.1 |
|
Apparent Magnitude: |
13.3 |
|
Right Ascension(RA) |
282.3775 |
|
Declination (DEC) |
44.6946 |
|
Hubble Space Telescope Guide Star Catalog (GSC) ID |
|
|
Discovered by |
|
|
Discovery Paper - Authors |
"Ji Wang, Debra A. Fischer, Thomas Barclay, Alyssa Picard, Bo Ma, Brendan P. Bowler, Joseph R. Schmitt, Tabetha S. Boyajian, Kian J. Jek, Daryll LaCourse, Christoph Baranec, Reed Riddle, Nicholas M. Law, Chris Lintott, Kevin Schawinski, Dean Joseph Simister, Boscher Gregoire, Sean P. Babin, Trevor Poile, Thomas Lee Jacobs, Tony Jebson, Mark R. Omohundro, Hans Martin Schwengeler, Johann Sejpka, Ivan A.Terentev, Robert Gagliano, Jari-Pekka Paakkonen, Hans Kristian Otnes Berge, Troy Winarski, Gerald R. Green, Allan R. Schmitt, Martti H. Kristiansen, Abe Hoekstra" |
|
Discovery Paper - Title |
Planet Hunters. VIII. Characterization of 41 Long-Period Exoplanet Candidates from Kepler Archival Data |
|
Discovery Paper - Journal |
0 |
|
Discovery Paper - URL |
0 |
|
SIMBAD LINK |
https://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Kepler-457&submit=SIMBAD+search |
|
Open Exoplanet Database Link |
http://www.openexoplanetcatalogue.com/planet/KIC%208540376%20b/ |
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Kepler-457 b
Kepler-457 b
Kepler-457 b is an exoplanet orbiting the star Kepler-457, located about 3496.8 light-years (1072.1 pc) away from Solar System. Its discovery was publicly announced on 2015.
The host star Kepler-457 has apparent magnitude of 13.3, with absolute magnitude of 3.1. It is 1.0 times more massive and 1.2 times bigger compared with our Sun. The surface temperature is 6472 with its spectral types of F7
In this planetary system, the extrasolar planet Kepler-457 b orbits around the star Kepler-457 every 31.8 days with its orbital distance of 0.16 AU ( 24085257.2 km)
(Projected orbit of Kepler-457 b around its host star Kepler-457)
The Star Kepler-457 's habitable zone is located at the following distance
Inner Boundary (the orbital distance at Venus's Equivalent Radiation )
: 1.074 AU ( 160726257.4 km)
Earth Boundary (the orbital distance at Earth's Equivalent Radiation)
: 1.485 AU ( 222165690.5 km)
Outer Boundary (the orbital distance at Mars's Equivalent Radiation)
: 2.263 AU ( 338531347.2 km)
Snow Line (the orbital distance at Snow Line Equivalent Radiation)
: 3.330 AU ( 498163707.5 km)
Radiation at Planetary Boundary of Kepler-457 b : 116361.82 W/m2
(Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-457)
Kopparapu Recent Venus for Star Kepler-457 distance : 1.068 AU
Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-457 distance : 1.352 AU
Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-457 distance : 1.306 AU
Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-457 distance : 1.431 AU
Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-457 distance : 2.354 AU
Kopparapu Outer Boundary for Early Mars for Star Kepler-457 distance : 2.482 AU
(Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-457)
Original Kopparapu Recent Venus for Star Kepler-457 distance : 1.085 AU
Original Kopparapu Runaway Greenhouse for Star Kepler-457 distance : 1.387 AU
Original Kopparapu Moist Greenhouse for Star Kepler-457 distance : 1.436 AU
Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-457 distance : 2.396 AU
Original Kopparapu Outer Boundary for Early Mars for Star Kepler-457 distance : 2.492 AU
(Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-457)
(Position in Stellar Map of star Kepler-457 and its Exoplanet Kepler-457 b)
(Zoomed position in Stellar Map of star Kepler-457 and its Exoplanet Kepler-457 b (zoom level 3))
(Synthetic Spectrum of star Kepler-457*)
*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
