|
Exoplanet Name : |
K2-303 b |
|
Alternate Name : |
"2MASS J22302822-0758205 b, WISE J223028.26-075820.8 b, EPIC 206317286 b" |
|
Status : |
Confirmed |
|
Radius (Rjup / Re): |
0.0860 |
(Rjup) |
0.9640 |
(Rearth) |
|
Mass (Mjup / Me): |
0.0027 |
(Mjup) |
0.8584 |
(Mearth) |
|
Semi Major Axis / Orbital Distance Calculated |
0.0000 |
(AU) |
0.0237 |
(AU Est.) |
|
Eccentricity : |
0.0000 |
|
Orbital Period(Yrs) |
0.0043 |
|
Orbital Period(Observed/Estimated) |
1.58 |
(Days Obs.) |
0.00 |
(Days Est.) |
|
Surface Gravity (G Earth) |
0.9237 |
|
Star Radiation at Atmospheric Boundary: |
98606.1 |
(W/m2) |
|
Measured Temperature (K) |
0.0 |
(K) |
|
Blackbody T 0.1(K) |
790.9 |
(K) |
|
Blackbody T 0.3(K) |
742.7 |
(K) |
|
Blackbody T 0.7(K) |
601.0 |
(K) |
|
Tidally Locked Blackbody T 0.1(K) |
940.5 |
(K) |
|
Tidally Locked Blackbody T 0.3(K) |
883.3 |
(K) |
|
Size Class: |
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 : |
EPIC 206317286 |
|
Alternate Name : |
"2MASS J22302822-0758205, K2-303, WISE J223028.26-075820.8" |
|
Star Distance(LY) : |
1034.6 |
|
Stellar Radius(Rsun) : |
0.6 |
(Rsun Estimated) |
|
Stellar Mass(Msun) : |
0.7 |
(Msun Measured) |
0.7 |
(Msun Estimated) |
|
Star Age : |
0.0 |
(GY) |
|
Temperature : |
3300 |
(K) |
|
Spectral type : |
M9 |
|
UV portion[%]: |
0.2 |
|
Visible portion[%]: |
11.2 |
|
IR portion[%]: |
88.6 |
|
Metalicity : |
0.0 |
|
Absolute Magnitude: |
4.8 |
|
Apparent Magnitude: |
12.3 |
|
Right Ascension(RA) |
337.6176 |
|
Declination (DEC) |
-7.9724 |
|
Hubble Space Telescope Guide Star Catalog (GSC) ID |
|
|
Discovered by |
|
|
Discovery Paper - Authors |
|
|
Discovery Paper - Title |
|
|
Discovery Paper - Journal |
|
|
Discovery Paper - URL |
|
|
SIMBAD LINK |
http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=EPIC+206317286&submit=SIMBAD+search |
|
Open Exoplanet Database Link |
|
 |
 |
 |
 |
/
K2-303 b
K2-303 b
K2-303 b is an exoplanet orbiting the star EPIC 206317286, located about 1034.6 light-years (317.2 pc) away from Solar System. Its discovery was publicly announced on 2019.
The host star EPIC 206317286 has apparent magnitude of 12.3, with absolute magnitude of 4.8. It is 0.7 times more massive and 0.6 times bigger compared with our Sun. The surface temperature is 3300 with its spectral types of M9
In this planetary system, the extrasolar planet K2-303 b orbits around the star EPIC 206317286 every 1.6 days with its orbital distance of 0.02 AU ( 3546915.6 km)
(Projected orbit of K2-303 b around its host star EPIC 206317286)
The Star EPIC 206317286 's habitable zone is located at the following distance
Inner Boundary (the orbital distance at Venus's Equivalent Radiation )
: 0.146 AU ( 21788787.2 km)
Earth Boundary (the orbital distance at Earth's Equivalent Radiation)
: 0.201 AU ( 30117798.0 km)
Outer Boundary (the orbital distance at Mars's Equivalent Radiation)
: 0.307 AU ( 45892859.1 km)
Snow Line (the orbital distance at Snow Line Equivalent Radiation)
: 0.451 AU ( 67533352.6 km)
Radiation at Planetary Boundary of K2-303 b : 98606.11 W/m2
(Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star EPIC 206317286)
Kopparapu Recent Venus for Star EPIC 206317286 distance : 0.165 AU
Kopparapu Runaway Greenhouse for Earth-sized planet for Star EPIC 206317286 distance : 0.209 AU
Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star EPIC 206317286 distance : 0.202 AU
Kopparapu Runaway Greenhouse for Mars-sized planet for Star EPIC 206317286 distance : 0.222 AU
Kopparapu Outer Boundary for Maximum Greenhouse for Star EPIC 206317286 distance : 0.410 AU
Kopparapu Outer Boundary for Early Mars for Star EPIC 206317286 distance : 0.433 AU
(Habitable zone calculated based on Kopparapu et al.(2013) around the star EPIC 206317286)
Original Kopparapu Recent Venus for Star EPIC 206317286 distance : 0.164 AU
Original Kopparapu Runaway Greenhouse for Star EPIC 206317286 distance : 0.216 AU
Original Kopparapu Moist Greenhouse for Star EPIC 206317286 distance : 0.217 AU
Original Kopparapu Outer Boundary for Maximum Greenhouse for Star EPIC 206317286 distance : 0.417 AU
Original Kopparapu Outer Boundary for Early Mars for Star EPIC 206317286 distance : 0.433 AU
(Habitable zone calculated based on Kopparapu et al.(Original) around the star EPIC 206317286)
(Position in Stellar Map of star EPIC 206317286 and its Exoplanet K2-303 b)
(Zoomed position in Stellar Map of star EPIC 206317286 and its Exoplanet K2-303 b (zoom level 3))
(Synthetic Spectrum of star EPIC 206317286*)
*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
