|
Exoplanet Name : |
HD 128311 c |
|
Alternate Name : |
|
|
Status : |
Confirmed |
|
Radius (Rjup / Re): |
0.9078 |
(Rjup) |
10.1759 |
(Rearth) |
|
Mass (Mjup / Me): |
3.7900 |
(Mjup) |
1204.9850 |
(Mearth) |
|
Semi Major Axis / Orbital Distance Calculated |
1.7600 |
(AU) |
1.7600 |
(AU Est.) |
|
Eccentricity : |
0.1700 |
|
Orbital Period(Yrs) |
2.5160 |
|
Orbital Period(Observed/Estimated) |
919.00 |
(Days Obs.) |
930.51 |
(Days Est.) |
|
Surface Gravity (G Earth) |
11.6369 |
|
Star Radiation at Atmospheric Boundary: |
128.2 |
(W/m2) |
|
Measured Temperature (K) |
0.0 |
(K) |
|
Blackbody T 0.1(K) |
150.2 |
(K) |
|
Blackbody T 0.3(K) |
141.0 |
(K) |
|
Blackbody T 0.7(K) |
114.1 |
(K) |
|
Tidally Locked Blackbody T 0.1(K) |
178.6 |
(K) |
|
Tidally Locked Blackbody T 0.3(K) |
167.7 |
(K) |
|
Size Class: |
Jupiter-size |
|
Mass Class: |
|
|
Detection Type : |
Radial Velocity |
|
Mass Detection : |
Astrometry |
|
Radius Detection : |
|
|
Habitability by Solar Eq. Astronomical Unit: |
Not habitable |
|
Habitability by Kopparapu: |
Not habitable |
|
Star Name : |
HD 128311 |
|
Alternate Name : |
|
|
Star Distance(LY) : |
53.8 |
|
Stellar Radius(Rsun) : |
0.7 |
(Rsun Measured) |
|
Stellar Mass(Msun) : |
0.8 |
(Msun Measured) |
0.9 |
(Msun Estimated) |
|
Star Age : |
0.4 |
(GY) |
|
Temperature : |
4965 |
(K) |
|
Spectral type : |
K0V |
|
UV portion[%]: |
3.1 |
|
Visible portion[%]: |
36.7 |
|
IR portion[%]: |
60.2 |
|
Metalicity : |
0.1 |
|
Absolute Magnitude: |
6.4 |
|
Apparent Magnitude: |
7.5 |
|
Right Ascension(RA) |
219.0023 |
|
Declination (DEC) |
9.7464 |
|
Hubble Space Telescope Guide Star Catalog (GSC) ID |
0910-00165 |
|
Discovered by |
|
|
Discovery Paper - Authors |
Hanno Rein |
|
Discovery Paper - Title |
Reanalysis of radial velocity data from the resonant planetary system HD128311 |
|
Discovery Paper - Journal |
Mon Not R Astron Soc Lett (2015) 448 (1): L58-L61. DOI: https://doi.org/10.1093/mnrasl/slu202 |
|
Discovery Paper - URL |
https://academic.oup.com/mnrasl/article/448/1/L58/2891012/Reanalysis-of-radial-velocity-data-from-the |
|
SIMBAD LINK |
http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+128311+&submit=SIMBAD+search |
|
Open Exoplanet Database Link |
http://www.openexoplanetcatalogue.com/planet/HD%20128311%20c/ |
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HD 128311 c
HD 128311 c
HD 128311 c is an exoplanet orbiting the star HD 128311, located about 53.8 light-years (16.5 pc) away from Solar System. Its discovery was publicly announced on 2005.
The host star HD 128311 has apparent magnitude of 7.5, with absolute magnitude of 6.4. It is 0.8 times more massive and 0.7 times bigger compared with our Sun. The surface temperature is 4965 with its spectral types of K0V
In this planetary system, the extrasolar planet HD 128311 c orbits around the star HD 128311 every 919.0 days with its orbital distance of 1.76 AU ( 263292252.4 km)
(Projected orbit of HD 128311 c around its host star HD 128311)
The Star HD 128311 's habitable zone is located at the following distance
Inner Boundary (the orbital distance at Venus's Equivalent Radiation )
: 0.390 AU ( 58320263.6 km)
Earth Boundary (the orbital distance at Earth's Equivalent Radiation)
: 0.539 AU ( 80613845.2 km)
Outer Boundary (the orbital distance at Mars's Equivalent Radiation)
: 0.821 AU ( 122837660.3 km)
Snow Line (the orbital distance at Snow Line Equivalent Radiation)
: 1.208 AU ( 180760998.3 km)
Radiation at Planetary Boundary of HD 128311 c : 128.20 W/m2
(Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 128311)
Kopparapu Recent Venus for Star HD 128311 distance : 0.422 AU
Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 128311 distance : 0.535 AU
Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 128311 distance : 0.517 AU
Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 128311 distance : 0.567 AU
Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 128311 distance : 0.971 AU
Kopparapu Outer Boundary for Early Mars for Star HD 128311 distance : 1.024 AU
(Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 128311)
Original Kopparapu Recent Venus for Star HD 128311 distance : 0.418 AU
Original Kopparapu Runaway Greenhouse for Star HD 128311 distance : 0.551 AU
Original Kopparapu Moist Greenhouse for Star HD 128311 distance : 0.553 AU
Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 128311 distance : 0.987 AU
Original Kopparapu Outer Boundary for Early Mars for Star HD 128311 distance : 1.026 AU
(Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 128311)
(Position in Stellar Map of star HD 128311 and its Exoplanet HD 128311 c)
(Zoomed position in Stellar Map of star HD 128311 and its Exoplanet HD 128311 c (zoom level 3))
(Synthetic Spectrum of star HD 128311*)
*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
