|
Exoplanet Name : |
WASP-21 b |
|
Alternate Name : |
|
|
Status : |
Confirmed |
|
Radius (Rjup / Re): |
1.2100 |
(Rjup) |
13.5629 |
(Rearth) |
|
Mass (Mjup / Me): |
0.3000 |
(Mjup) |
95.3814 |
(Mearth) |
|
Semi Major Axis / Orbital Distance Calculated |
0.0520 |
(AU) |
0.0520 |
(AU Est.) |
|
Eccentricity : |
0.0000 |
|
Orbital Period(Yrs) |
0.0118 |
|
Orbital Period(Observed/Estimated) |
4.32 |
(Days Obs.) |
4.31 |
(Days Est.) |
|
Surface Gravity (G Earth) |
0.5185 |
|
Star Radiation at Atmospheric Boundary: |
576662.7 |
(W/m2) |
|
Measured Temperature (K) |
0.0 |
(K) |
|
Blackbody T 0.1(K) |
1229.9 |
(K) |
|
Blackbody T 0.3(K) |
1155.0 |
(K) |
|
Blackbody T 0.7(K) |
934.5 |
(K) |
|
Tidally Locked Blackbody T 0.1(K) |
1462.6 |
(K) |
|
Tidally Locked Blackbody T 0.3(K) |
1373.6 |
(K) |
|
Size Class: |
Jupiter-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 : |
WASP-21 |
|
Alternate Name : |
|
|
Star Distance(LY) : |
750.2 |
|
Stellar Radius(Rsun) : |
1.1 |
(Rsun Measured) |
|
Stellar Mass(Msun) : |
1.0 |
(Msun Measured) |
1.0 |
(Msun Estimated) |
|
Star Age : |
0.0 |
(GY) |
|
Temperature : |
5800 |
(K) |
|
Spectral type : |
G3V |
|
UV portion[%]: |
7.8 |
|
Visible portion[%]: |
44.8 |
|
IR portion[%]: |
47.4 |
|
Metalicity : |
-0.4 |
|
Absolute Magnitude: |
4.8 |
|
Apparent Magnitude: |
11.6 |
|
Right Ascension(RA) |
347.4927 |
|
Declination (DEC) |
18.3961 |
|
Hubble Space Telescope Guide Star Catalog (GSC) ID |
01715-00679 |
|
Discovered by |
|
|
Discovery Paper - Authors |
CUTRI R.M.; SKRUTSKIE M.F.; VAN DYK S.; BEICHMAN C.A.; CARPENTER J.M.; CHESTER T.; CAMBRESY L.; EVANS T.; FOWLER J.; GIZIS J.; HOWARD E.; HUCHRA J.; JARRETT T.; KOPAN E.L.; KIRKPATRICK J.D.; LIGHT R.M.; MARSH K.A.; McCALLON H.; SCHNEIDER S.; STIENING R.; SYKES M.; WEINBERG M.; WHEATON W.A.; WHEELOCK S.; ZACARIAS N. |
|
Discovery Paper - Title |
2MASS All Sky Catalog of point sources. |
|
Discovery Paper - Journal |
0 |
|
Discovery Paper - URL |
0 |
|
SIMBAD LINK |
http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=WASP-21+&submit=SIMBAD+search |
|
Open Exoplanet Database Link |
http://www.openexoplanetcatalogue.com/planet/WASP-21%20b/ |
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WASP-21 b
WASP-21 b
WASP-21 b is an exoplanet orbiting the star WASP-21, located about 750.2 light-years (230.0 pc) away from Solar System. Its discovery was publicly announced on 2010.
The host star WASP-21 has apparent magnitude of 11.6, with absolute magnitude of 4.8. It is 1.0 times more massive and 1.1 times bigger compared with our Sun. The surface temperature is 5800 with its spectral types of G3V
In this planetary system, the extrasolar planet WASP-21 b orbits around the star WASP-21 every 4.3 days with its orbital distance of 0.05 AU ( 7779089.3 km)
(Projected orbit of WASP-21 b around its host star WASP-21)
The Star WASP-21 's habitable zone is located at the following distance
Inner Boundary (the orbital distance at Venus's Equivalent Radiation )
: 0.772 AU ( 115563308.0 km)
Earth Boundary (the orbital distance at Earth's Equivalent Radiation)
: 1.068 AU ( 159738691.9 km)
Outer Boundary (the orbital distance at Mars's Equivalent Radiation)
: 1.627 AU ( 243406416.3 km)
Snow Line (the orbital distance at Snow Line Equivalent Radiation)
: 2.394 AU ( 358183204.6 km)
Radiation at Planetary Boundary of WASP-21 b : 576662.66 W/m2
(Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star WASP-21)
Kopparapu Recent Venus for Star WASP-21 distance : 0.800 AU
Kopparapu Runaway Greenhouse for Earth-sized planet for Star WASP-21 distance : 1.013 AU
Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star WASP-21 distance : 0.978 AU
Kopparapu Runaway Greenhouse for Mars-sized planet for Star WASP-21 distance : 1.072 AU
Kopparapu Outer Boundary for Maximum Greenhouse for Star WASP-21 distance : 1.787 AU
Kopparapu Outer Boundary for Early Mars for Star WASP-21 distance : 1.885 AU
(Habitable zone calculated based on Kopparapu et al.(2013) around the star WASP-21)
Original Kopparapu Recent Venus for Star WASP-21 distance : 0.801 AU
Original Kopparapu Runaway Greenhouse for Star WASP-21 distance : 1.040 AU
Original Kopparapu Moist Greenhouse for Star WASP-21 distance : 1.060 AU
Original Kopparapu Outer Boundary for Maximum Greenhouse for Star WASP-21 distance : 1.818 AU
Original Kopparapu Outer Boundary for Early Mars for Star WASP-21 distance : 1.891 AU
(Habitable zone calculated based on Kopparapu et al.(Original) around the star WASP-21)
(Position in Stellar Map of star WASP-21 and its Exoplanet WASP-21 b)
(Zoomed position in Stellar Map of star WASP-21 and its Exoplanet WASP-21 b (zoom level 3))
(Synthetic Spectrum of star WASP-21*)
*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
