|
Exoplanet Name : |
HD 178911 B b |
|
Alternate Name : |
|
|
Status : |
Confirmed |
|
Radius (Rjup / Re): |
0.9078 |
(Rjup) |
10.1759 |
(Rearth) |
|
Mass (Mjup / Me): |
6.2920 |
(Mjup) |
2000.4659 |
(Mearth) |
|
Semi Major Axis / Orbital Distance Calculated |
0.3200 |
(AU) |
0.3200 |
(AU Est.) |
|
Eccentricity : |
0.1243 |
|
Orbital Period(Yrs) |
0.1957 |
|
Orbital Period(Observed/Estimated) |
71.49 |
(Days Obs.) |
63.92 |
(Days Est.) |
|
Surface Gravity (G Earth) |
19.3192 |
|
Star Radiation at Atmospheric Boundary: |
15860.2 |
(W/m2) |
|
Measured Temperature (K) |
0.0 |
(K) |
|
Blackbody T 0.1(K) |
500.9 |
(K) |
|
Blackbody T 0.3(K) |
470.4 |
(K) |
|
Blackbody T 0.7(K) |
380.6 |
(K) |
|
Tidally Locked Blackbody T 0.1(K) |
595.6 |
(K) |
|
Tidally Locked Blackbody T 0.3(K) |
559.4 |
(K) |
|
Size Class: |
Jupiter-size |
|
Mass Class: |
|
|
Detection Type : |
Radial Velocity |
|
Mass Detection : |
|
|
Radius Detection : |
|
|
Habitability by Solar Eq. Astronomical Unit: |
Not habitable |
|
Habitability by Kopparapu: |
Not habitable |
|
Star Name : |
HD 178911 B |
|
Alternate Name : |
|
|
Star Distance(LY) : |
135.4 |
|
Stellar Radius(Rsun) : |
1.1 |
(Rsun Measured) |
|
Stellar Mass(Msun) : |
1.1 |
(Msun Measured) |
0.9 |
(Msun Estimated) |
|
Star Age : |
5.2 |
(GY) |
|
Temperature : |
5650 |
(K) |
|
Spectral type : |
G5 |
|
UV portion[%]: |
7.4 |
|
Visible portion[%]: |
44.1 |
|
IR portion[%]: |
48.4 |
|
Metalicity : |
0.3 |
|
Absolute Magnitude: |
4.9 |
|
Apparent Magnitude: |
8.0 |
|
Right Ascension(RA) |
287.2629 |
|
Declination (DEC) |
34.5997 |
|
Hubble Space Telescope Guide Star Catalog (GSC) ID |
02648-02151 |
|
Discovered by |
|
|
Discovery Paper - Authors |
"S. Zucker , D. Naef , D. W. Latham , M. Mayor , T. Mazeh , J. L. Beuzit , G. Drukier and, C. Perrier-Bellet , D. Queloz , J. P. Sivan , G. Torres, S. Udry" |
|
Discovery Paper - Title |
A Planet Candidate in the Stellar Triple System HD178911 |
|
Discovery Paper - Journal |
"The Astrophysical Journal,olume 568,umber 1" |
|
Discovery Paper - URL |
http://iopscience.iop.org/article/10.1086/338892/meta |
|
SIMBAD LINK |
http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+178911+B+&submit=SIMBAD+search |
|
Open Exoplanet Database Link |
http://www.openexoplanetcatalogue.com/planet/HD%20178911%20B%20b/ |
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HD 178911 B b
HD 178911 B b
HD 178911 B b is an exoplanet orbiting the star HD 178911 B, located about 135.4 light-years (41.5 pc) away from Solar System. Its discovery was publicly announced on 2001.
The host star HD 178911 B has apparent magnitude of 8.0, with absolute magnitude of 4.9. It is 1.1 times more massive and 1.1 times bigger compared with our Sun. The surface temperature is 5650 with its spectral types of G5
In this planetary system, the extrasolar planet HD 178911 B b orbits around the star HD 178911 B every 71.5 days with its orbital distance of 0.32 AU ( 47871318.6 km)
(Projected orbit of HD 178911 B b around its host star HD 178911 B)
The Star HD 178911 B 's habitable zone is located at the following distance
Inner Boundary (the orbital distance at Venus's Equivalent Radiation )
: 0.788 AU ( 117939656.7 km)
Earth Boundary (the orbital distance at Earth's Equivalent Radiation)
: 1.090 AU ( 163023426.9 km)
Outer Boundary (the orbital distance at Mars's Equivalent Radiation)
: 1.661 AU ( 248411625.6 km)
Snow Line (the orbital distance at Snow Line Equivalent Radiation)
: 2.444 AU ( 365548589.3 km)
Radiation at Planetary Boundary of HD 178911 B b : 15860.19 W/m2
(Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 178911 B)
Kopparapu Recent Venus for Star HD 178911 B distance : 0.823 AU
Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 178911 B distance : 1.043 AU
Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 178911 B distance : 1.007 AU
Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 178911 B distance : 1.104 AU
Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 178911 B distance : 1.848 AU
Kopparapu Outer Boundary for Early Mars for Star HD 178911 B distance : 1.949 AU
(Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 178911 B)
Original Kopparapu Recent Venus for Star HD 178911 B distance : 0.822 AU
Original Kopparapu Runaway Greenhouse for Star HD 178911 B distance : 1.072 AU
Original Kopparapu Moist Greenhouse for Star HD 178911 B distance : 1.088 AU
Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 178911 B distance : 1.880 AU
Original Kopparapu Outer Boundary for Early Mars for Star HD 178911 B distance : 1.955 AU
(Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 178911 B)
(Position in Stellar Map of star HD 178911 B and its Exoplanet HD 178911 B b)
(Zoomed position in Stellar Map of star HD 178911 B and its Exoplanet HD 178911 B b (zoom level 3))
(Synthetic Spectrum of star HD 178911 B*)
*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
