|
Exoplanet Name : |
Cha Ha 8 b |
|
Alternate Name : |
|
|
Status : |
Confirmed |
|
Radius (Rjup / Re): |
0.9078 |
(Rjup) |
10.1759 |
(Rearth) |
|
Mass (Mjup / Me): |
25.0000 |
(Mjup) |
7948.4500 |
(Mearth) |
|
Semi Major Axis / Orbital Distance Calculated |
1.0200 |
(AU) |
1.0200 |
(AU Est.) |
|
Eccentricity : |
0.5900 |
|
Orbital Period(Yrs) |
5.1881 |
|
Orbital Period(Observed/Estimated) |
1895.00 |
(Days Obs.) |
1290.57 |
(Days Est.) |
|
Surface Gravity (G Earth) |
76.7608 |
|
Star Radiation at Atmospheric Boundary: |
0.7 |
(W/m2) |
|
Measured Temperature (K) |
0.0 |
(K) |
|
Blackbody T 0.1(K) |
40.2 |
(K) |
|
Blackbody T 0.3(K) |
37.8 |
(K) |
|
Blackbody T 0.7(K) |
30.6 |
(K) |
|
Tidally Locked Blackbody T 0.1(K) |
47.8 |
(K) |
|
Tidally Locked Blackbody T 0.3(K) |
44.9 |
(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 : |
Cha Ha 8 |
|
Alternate Name : |
2MASS J11074610-7740089 |
|
Star Distance(LY) : |
641.7 |
|
Stellar Radius(Rsun) : |
0.1 |
(Rsun Estimated) |
|
Stellar Mass(Msun) : |
0.1 |
(Msun Measured) |
0.0 |
(Msun Estimated) |
|
Star Age : |
0.0 |
(GY) |
|
Temperature : |
2967 |
(K) |
|
Spectral type : |
M6.5 |
|
UV portion[%]: |
0.1 |
|
Visible portion[%]: |
3.2 |
|
IR portion[%]: |
96.7 |
|
Metalicity : |
0.0 |
|
Absolute Magnitude: |
13.6 |
|
Apparent Magnitude: |
20.1 |
|
Right Ascension(RA) |
166.9420 |
|
Declination (DEC) |
-77.6691 |
|
Hubble Space Telescope Guide Star Catalog (GSC) ID |
|
|
Discovered by |
|
|
Discovery Paper - Authors |
|
|
Discovery Paper - Title |
|
|
Discovery Paper - Journal |
|
|
Discovery Paper - URL |
|
|
SIMBAD LINK |
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|
Open Exoplanet Database Link |
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Cha Ha 8 b
Cha Ha 8 b
Cha Ha 8 b is an exoplanet orbiting the star Cha Ha 8, located about 641.7 light-years (196.8 pc) away from Solar System. Its discovery was publicly announced on 2007.
The host star Cha Ha 8 has apparent magnitude of 20.1, with absolute magnitude of 13.6. It is 0.1 times more massive and 0.1 times bigger compared with our Sun. The surface temperature is 2967 with its spectral types of M6.5
In this planetary system, the extrasolar planet Cha Ha 8 b orbits around the star Cha Ha 8 every 1895.0 days with its orbital distance of 1.02 AU ( 152589828.1 km)
(Projected orbit of Cha Ha 8 b around its host star Cha Ha 8)
The Star Cha Ha 8 's habitable zone is located at the following distance
Inner Boundary (the orbital distance at Venus's Equivalent Radiation )
: 0.016 AU ( 2425002.2 km)
Earth Boundary (the orbital distance at Earth's Equivalent Radiation)
: 0.022 AU ( 3351986.7 km)
Outer Boundary (the orbital distance at Mars's Equivalent Radiation)
: 0.034 AU ( 5107686.0 km)
Snow Line (the orbital distance at Snow Line Equivalent Radiation)
: 0.050 AU ( 7516183.7 km)
Radiation at Planetary Boundary of Cha Ha 8 b : 0.66 W/m2
(Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Cha Ha 8)
Kopparapu Recent Venus for Star Cha Ha 8 distance : 0.018 AU
Kopparapu Runaway Greenhouse for Earth-sized planet for Star Cha Ha 8 distance : 0.023 AU
Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Cha Ha 8 distance : 0.022 AU
Kopparapu Runaway Greenhouse for Mars-sized planet for Star Cha Ha 8 distance : 0.025 AU
Kopparapu Outer Boundary for Maximum Greenhouse for Star Cha Ha 8 distance : 0.047 AU
Kopparapu Outer Boundary for Early Mars for Star Cha Ha 8 distance : 0.049 AU
(Habitable zone calculated based on Kopparapu et al.(2013) around the star Cha Ha 8)
Original Kopparapu Recent Venus for Star Cha Ha 8 distance : 0.018 AU
Original Kopparapu Runaway Greenhouse for Star Cha Ha 8 distance : 0.024 AU
Original Kopparapu Moist Greenhouse for Star Cha Ha 8 distance : 0.024 AU
Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Cha Ha 8 distance : 0.047 AU
Original Kopparapu Outer Boundary for Early Mars for Star Cha Ha 8 distance : 0.049 AU
(Habitable zone calculated based on Kopparapu et al.(Original) around the star Cha Ha 8)
(Position in Stellar Map of star Cha Ha 8 and its Exoplanet Cha Ha 8 b)
(Zoomed position in Stellar Map of star Cha Ha 8 and its Exoplanet Cha Ha 8 b (zoom level 3))
(Synthetic Spectrum of star Cha Ha 8*)
*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
