|
Exoplanet Name : |
gamma Cephei b |
|
Alternate Name : |
gam Cephei b |
|
Status : |
Confirmed |
|
Radius (Rjup / Re): |
0.9078 |
(Rjup) |
10.1759 |
(Rearth) |
|
Mass (Mjup / Me): |
17.5390 |
(Mjup) |
5576.3146 |
(Mearth) |
|
Semi Major Axis / Orbital Distance Calculated |
2.1459 |
(AU) |
2.1459 |
(AU Est.) |
|
Eccentricity : |
0.0724 |
|
Orbital Period(Yrs) |
2.4794 |
|
Orbital Period(Observed/Estimated) |
905.64 |
(Days Obs.) |
970.38 |
(Days Est.) |
|
Surface Gravity (G Earth) |
53.8523 |
|
Star Radiation at Atmospheric Boundary: |
3394.2 |
(W/m2) |
|
Measured Temperature (K) |
0.0 |
(K) |
|
Blackbody T 0.1(K) |
340.7 |
(K) |
|
Blackbody T 0.3(K) |
319.9 |
(K) |
|
Blackbody T 0.7(K) |
258.8 |
(K) |
|
Tidally Locked Blackbody T 0.1(K) |
405.1 |
(K) |
|
Tidally Locked Blackbody T 0.3(K) |
380.5 |
(K) |
|
Size Class: |
Jupiter-size |
|
Mass Class: |
|
|
Detection Type : |
Radial Velocity |
|
Mass Detection : |
Radial Velocity |
|
Radius Detection : |
|
|
Habitability by Solar Eq. Astronomical Unit: |
Not habitable |
|
Habitability by Kopparapu: |
Not habitable |
|
Star Name : |
gamma Cephei |
|
Alternate Name : |
gam Cephei |
|
Star Distance(LY) : |
46.0 |
|
Stellar Radius(Rsun) : |
4.9 |
(Rsun Measured) |
|
Stellar Mass(Msun) : |
1.4 |
(Msun Measured) |
1.6 |
(Msun Estimated) |
|
Star Age : |
6.6 |
(GY) |
|
Temperature : |
4800 |
(K) |
|
Spectral type : |
K1III-IV |
|
UV portion[%]: |
2.4 |
|
Visible portion[%]: |
35.4 |
|
IR portion[%]: |
62.1 |
|
Metalicity : |
0.2 |
|
Absolute Magnitude: |
2.5 |
|
Apparent Magnitude: |
3.2 |
|
Right Ascension(RA) |
354.8369 |
|
Declination (DEC) |
77.6322 |
|
Hubble Space Telescope Guide Star Catalog (GSC) ID |
04606-03584 |
|
Discovered by |
|
|
Discovery Paper - Authors |
"Neuh_user,.; Mugrauer,.; Fukagawa,.; Torres,.; Schmidt,." |
|
Discovery Paper - Title |
Direct detection of exoplanet host star companion ¥¹¥ò¥» Cep B and revised masses for both stars and the sub-stellar object |
|
Discovery Paper - Journal |
0 |
|
Discovery Paper - URL |
0 |
|
SIMBAD LINK |
http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=gamma+Cephei+&submit=SIMBAD+search |
|
Open Exoplanet Database Link |
http://www.openexoplanetcatalogue.com/planet/Gamma%20Cephei%20b/ |
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gamma Cephei b
gamma Cephei b
gamma Cephei b is an exoplanet orbiting the star gamma Cephei, located about 46.0 light-years (14.1 pc) away from Solar System. Its discovery was publicly announced on 2003.
The host star gamma Cephei has apparent magnitude of 3.2, with absolute magnitude of 2.5. It is 1.4 times more massive and 4.9 times bigger compared with our Sun. The surface temperature is 4800 with its spectral types of K1III-IV
In this planetary system, the extrasolar planet gamma Cephei b orbits around the star gamma Cephei every 905.6 days with its orbital distance of 2.15 AU ( 321022070.7 km)
(Projected orbit of gamma Cephei b around its host star gamma Cephei)
The Star gamma Cephei 's habitable zone is located at the following distance
Inner Boundary (the orbital distance at Venus's Equivalent Radiation )
: 2.446 AU ( 365878312.4 km)
Earth Boundary (the orbital distance at Earth's Equivalent Radiation)
: 3.381 AU ( 505739443.2 km)
Outer Boundary (the orbital distance at Mars's Equivalent Radiation)
: 5.151 AU ( 770634991.5 km)
Snow Line (the orbital distance at Snow Line Equivalent Radiation)
: 7.580 AU ( 1134023149.3 km)
Radiation at Planetary Boundary of gamma Cephei b : 3394.24 W/m2
(Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star gamma Cephei)
Kopparapu Recent Venus for Star gamma Cephei distance : 2.670 AU
Kopparapu Runaway Greenhouse for Earth-sized planet for Star gamma Cephei distance : 3.380 AU
Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star gamma Cephei distance : 3.265 AU
Kopparapu Runaway Greenhouse for Mars-sized planet for Star gamma Cephei distance : 3.584 AU
Kopparapu Outer Boundary for Maximum Greenhouse for Star gamma Cephei distance : 6.177 AU
Kopparapu Outer Boundary for Early Mars for Star gamma Cephei distance : 6.516 AU
(Habitable zone calculated based on Kopparapu et al.(2013) around the star gamma Cephei)
Original Kopparapu Recent Venus for Star gamma Cephei distance : 2.637 AU
Original Kopparapu Runaway Greenhouse for Star gamma Cephei distance : 3.486 AU
Original Kopparapu Moist Greenhouse for Star gamma Cephei distance : 3.490 AU
Original Kopparapu Outer Boundary for Maximum Greenhouse for Star gamma Cephei distance : 6.280 AU
Original Kopparapu Outer Boundary for Early Mars for Star gamma Cephei distance : 6.531 AU
(Habitable zone calculated based on Kopparapu et al.(Original) around the star gamma Cephei)
(Position in Stellar Map of star gamma Cephei and its Exoplanet gamma Cephei b)
(Zoomed position in Stellar Map of star gamma Cephei and its Exoplanet gamma Cephei b (zoom level 3))
(Synthetic Spectrum of star gamma Cephei*)
*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
