|
Exoplanet Name : |
HATS-21 b |
|
Alternate Name : |
|
|
Status : |
Confirmed |
|
Radius (Rjup / Re): |
1.1230 |
(Rjup) |
12.5877 |
(Rearth) |
|
Mass (Mjup / Me): |
0.3320 |
(Mjup) |
105.5554 |
(Mearth) |
|
Semi Major Axis / Orbital Distance Calculated |
0.0468 |
(AU) |
0.0468 |
(AU Est.) |
|
Eccentricity : |
0.0000 |
|
Orbital Period(Yrs) |
0.0097 |
|
Orbital Period(Observed/Estimated) |
3.55 |
(Days Obs.) |
3.55 |
(Days Est.) |
|
Surface Gravity (G Earth) |
0.6662 |
|
Star Radiation at Atmospheric Boundary: |
615010.0 |
(W/m2) |
|
Measured Temperature (K) |
0.0 |
(K) |
|
Blackbody T 0.1(K) |
1249.9 |
(K) |
|
Blackbody T 0.3(K) |
1173.8 |
(K) |
|
Blackbody T 0.7(K) |
949.7 |
(K) |
|
Tidally Locked Blackbody T 0.1(K) |
1486.3 |
(K) |
|
Tidally Locked Blackbody T 0.3(K) |
1395.8 |
(K) |
|
Size Class: |
Jupiter-size |
|
Mass Class: |
|
|
Detection Type : |
Primary Transit |
|
Mass Detection : |
Radial Velocity |
|
Radius Detection : |
Primary Transit |
|
Habitability by Solar Eq. Astronomical Unit: |
Not habitable |
|
Habitability by Kopparapu: |
Not habitable |
|
Star Name : |
HATS-21 |
|
Alternate Name : |
|
|
Star Distance(LY) : |
932.8 |
|
Stellar Radius(Rsun) : |
1.0 |
(Rsun Measured) |
|
Stellar Mass(Msun) : |
1.1 |
(Msun Measured) |
1.1 |
(Msun Estimated) |
|
Star Age : |
2.3 |
(GY) |
|
Temperature : |
5695 |
(K) |
|
Spectral type : |
G4V |
|
UV portion[%]: |
7.6 |
|
Visible portion[%]: |
44.4 |
|
IR portion[%]: |
48.0 |
|
Metalicity : |
0.3 |
|
Absolute Magnitude: |
4.9 |
|
Apparent Magnitude: |
12.2 |
|
Right Ascension(RA) |
280.1833 |
|
Declination (DEC) |
-58.4592 |
|
Hubble Space Telescope Guide Star Catalog (GSC) ID |
|
|
Discovered by |
|
|
Discovery Paper - Authors |
|
|
Discovery Paper - Title |
|
|
Discovery Paper - Journal |
0 |
|
Discovery Paper - URL |
0 |
|
SIMBAD LINK |
https://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HATS-21&submit=SIMBAD+search |
|
Open Exoplanet Database Link |
|
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HATS-21 b
HATS-21 b
HATS-21 b is an exoplanet orbiting the star HATS-21, located about 932.8 light-years (286.0 pc) away from Solar System. Its discovery was publicly announced on 2016.
The host star HATS-21 has apparent magnitude of 12.2, with absolute magnitude of 4.9. It is 1.1 times more massive and 1.0 times bigger compared with our Sun. The surface temperature is 5695 with its spectral types of G4V
In this planetary system, the extrasolar planet HATS-21 b orbits around the star HATS-21 every 3.6 days with its orbital distance of 0.05 AU ( 6995196.4 km)
(Projected orbit of HATS-21 b around its host star HATS-21)
The Star HATS-21 's habitable zone is located at the following distance
Inner Boundary (the orbital distance at Venus's Equivalent Radiation )
: 0.717 AU ( 107317688.9 km)
Earth Boundary (the orbital distance at Earth's Equivalent Radiation)
: 0.992 AU ( 148341091.5 km)
Outer Boundary (the orbital distance at Mars's Equivalent Radiation)
: 1.511 AU ( 226038995.6 km)
Snow Line (the orbital distance at Snow Line Equivalent Radiation)
: 2.223 AU ( 332626284.2 km)
Radiation at Planetary Boundary of HATS-21 b : 615010.04 W/m2
(Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HATS-21)
Kopparapu Recent Venus for Star HATS-21 distance : 0.747 AU
Kopparapu Runaway Greenhouse for Earth-sized planet for Star HATS-21 distance : 0.946 AU
Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HATS-21 distance : 0.914 AU
Kopparapu Runaway Greenhouse for Mars-sized planet for Star HATS-21 distance : 1.002 AU
Kopparapu Outer Boundary for Maximum Greenhouse for Star HATS-21 distance : 1.675 AU
Kopparapu Outer Boundary for Early Mars for Star HATS-21 distance : 1.766 AU
(Habitable zone calculated based on Kopparapu et al.(2013) around the star HATS-21)
Original Kopparapu Recent Venus for Star HATS-21 distance : 0.747 AU
Original Kopparapu Runaway Greenhouse for Star HATS-21 distance : 0.973 AU
Original Kopparapu Moist Greenhouse for Star HATS-21 distance : 0.988 AU
Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HATS-21 distance : 1.704 AU
Original Kopparapu Outer Boundary for Early Mars for Star HATS-21 distance : 1.772 AU
(Habitable zone calculated based on Kopparapu et al.(Original) around the star HATS-21)
(Position in Stellar Map of star HATS-21 and its Exoplanet HATS-21 b)
(Zoomed position in Stellar Map of star HATS-21 and its Exoplanet HATS-21 b (zoom level 3))
(Synthetic Spectrum of star HATS-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
