|
Exoplanet Name : |
HD 18742 b |
|
Alternate Name : |
|
|
Status : |
Confirmed |
|
Radius (Rjup / Re): |
1.1660 |
(Rjup) |
13.0697 |
(Rearth) |
|
Mass (Mjup / Me): |
3.4000 |
(Mjup) |
1080.9892 |
(Mearth) |
|
Semi Major Axis / Orbital Distance Calculated |
1.8200 |
(AU) |
1.8200 |
(AU Est.) |
|
Eccentricity : |
0.0400 |
|
Orbital Period(Yrs) |
2.0971 |
|
Orbital Period(Observed/Estimated) |
766.00 |
(Days Obs.) |
769.00 |
(Days Est.) |
|
Surface Gravity (G Earth) |
6.3284 |
|
Star Radiation at Atmospheric Boundary: |
5802.4 |
(W/m2) |
|
Measured Temperature (K) |
0.0 |
(K) |
|
Blackbody T 0.1(K) |
389.5 |
(K) |
|
Blackbody T 0.3(K) |
365.8 |
(K) |
|
Blackbody T 0.7(K) |
296.0 |
(K) |
|
Tidally Locked Blackbody T 0.1(K) |
463.2 |
(K) |
|
Tidally Locked Blackbody T 0.3(K) |
435.0 |
(K) |
|
Size Class: |
Jupiter-size |
|
Mass Class: |
|
|
Detection Type : |
Radial Velocity |
|
Mass Detection : |
Radial Velocity |
|
Radius Detection : |
Theoretical |
|
Habitability by Solar Eq. Astronomical Unit: |
Not habitable |
|
Habitability by Kopparapu: |
Not habitable |
|
Star Name : |
HD 18742 |
|
Alternate Name : |
|
|
Star Distance(LY) : |
524.4 |
|
Stellar Radius(Rsun) : |
5.1 |
(Rsun Measured) |
|
Stellar Mass(Msun) : |
1.4 |
(Msun Measured) |
1.4 |
(Msun Estimated) |
|
Star Age : |
2.3 |
(GY) |
|
Temperature : |
4940 |
(K) |
|
Spectral type : |
G8/K0 |
|
UV portion[%]: |
2.9 |
|
Visible portion[%]: |
36.5 |
|
IR portion[%]: |
60.6 |
|
Metalicity : |
-0.0 |
|
Absolute Magnitude: |
1.8 |
|
Apparent Magnitude: |
7.8 |
|
Right Ascension(RA) |
45.0444 |
|
Declination (DEC) |
-20.8026 |
|
Hubble Space Telescope Guide Star Catalog (GSC) ID |
05870-00602 |
|
Discovered by |
|
|
Discovery Paper - Authors |
0 |
|
Discovery Paper - Title |
|
|
Discovery Paper - Journal |
0 |
|
Discovery Paper - URL |
0 |
|
SIMBAD LINK |
http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+18742+&submit=SIMBAD+search |
|
Open Exoplanet Database Link |
http://www.openexoplanetcatalogue.com/planet/HD%2018742%20b/ |
 |
 |
 |
 |
/
HD 18742 b
HD 18742 b
HD 18742 b is an exoplanet orbiting the star HD 18742, located about 524.4 light-years (160.8 pc) away from Solar System. Its discovery was publicly announced on 2011.
The host star HD 18742 has apparent magnitude of 7.8, with absolute magnitude of 1.8. It is 1.4 times more massive and 5.1 times bigger compared with our Sun. The surface temperature is 4940 with its spectral types of G8/K0
In this planetary system, the extrasolar planet HD 18742 b orbits around the star HD 18742 every 766.0 days with its orbital distance of 1.82 AU ( 272268124.7 km)
(Projected orbit of HD 18742 b around its host star HD 18742)
The Star HD 18742 's habitable zone is located at the following distance
Inner Boundary (the orbital distance at Venus's Equivalent Radiation )
: 2.712 AU ( 405722764.0 km)
Earth Boundary (the orbital distance at Earth's Equivalent Radiation)
: 3.749 AU ( 560814887.8 km)
Outer Boundary (the orbital distance at Mars's Equivalent Radiation)
: 5.712 AU ( 854557781.0 km)
Snow Line (the orbital distance at Snow Line Equivalent Radiation)
: 8.406 AU ( 1257519210.5 km)
Radiation at Planetary Boundary of HD 18742 b : 5802.36 W/m2
(Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 18742)
Kopparapu Recent Venus for Star HD 18742 distance : 2.942 AU
Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 18742 distance : 3.725 AU
Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 18742 distance : 3.598 AU
Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 18742 distance : 3.949 AU
Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 18742 distance : 6.768 AU
Kopparapu Outer Boundary for Early Mars for Star HD 18742 distance : 7.139 AU
(Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 18742)
Original Kopparapu Recent Venus for Star HD 18742 distance : 2.910 AU
Original Kopparapu Runaway Greenhouse for Star HD 18742 distance : 3.840 AU
Original Kopparapu Moist Greenhouse for Star HD 18742 distance : 3.850 AU
Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 18742 distance : 6.881 AU
Original Kopparapu Outer Boundary for Early Mars for Star HD 18742 distance : 7.156 AU
(Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 18742)
(Position in Stellar Map of star HD 18742 and its Exoplanet HD 18742 b)
(Zoomed position in Stellar Map of star HD 18742 and its Exoplanet HD 18742 b (zoom level 3))
(Synthetic Spectrum of star HD 18742*)
*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
