|
Exoplanet Name : |
Ross 128 b |
|
Alternate Name : |
|
|
Status : |
Confirmed |
|
Radius (Rjup / Re): |
0.0979 |
(Rjup) |
1.0972 |
(Rearth) |
|
Mass (Mjup / Me): |
0.0044 |
(Mjup) |
1.3989 |
(Mearth) |
|
Semi Major Axis / Orbital Distance Calculated |
0.0496 |
(AU) |
0.0496 |
(AU Est.) |
|
Eccentricity : |
0.1160 |
|
Orbital Period(Yrs) |
0.0270 |
|
Orbital Period(Observed/Estimated) |
9.87 |
(Days Obs.) |
9.84 |
(Days Est.) |
|
Surface Gravity (G Earth) |
1.1620 |
|
Star Radiation at Atmospheric Boundary: |
2002.2 |
(W/m2) |
|
Measured Temperature (K) |
0.0 |
(K) |
|
Blackbody T 0.1(K) |
298.6 |
(K) |
|
Blackbody T 0.3(K) |
280.4 |
(K) |
|
Blackbody T 0.7(K) |
226.8 |
(K) |
|
Tidally Locked Blackbody T 0.1(K) |
355.0 |
(K) |
|
Tidally Locked Blackbody T 0.3(K) |
333.4 |
(K) |
|
Size Class: |
Earth-size |
|
Mass Class: |
|
|
Detection Type : |
Radial Velocity |
|
Mass Detection : |
Radial Velocity |
|
Radius Detection : |
|
|
Habitability by Solar Eq. Astronomical Unit: |
Habitable |
|
Habitability by Kopparapu: |
Habitable |
|
Star Name : |
Ross 128 |
|
Alternate Name : |
"Proxima Virginis, GJ447, HIP 57548" |
|
Star Distance(LY) : |
11.0 |
|
Stellar Radius(Rsun) : |
0.2 |
(Rsun Measured) |
|
Stellar Mass(Msun) : |
0.2 |
(Msun Measured) |
0.2 |
(Msun Estimated) |
|
Star Age : |
5.0 |
(GY) |
|
Temperature : |
3192 |
(K) |
|
Spectral type : |
M4 |
|
UV portion[%]: |
0.1 |
|
Visible portion[%]: |
7.9 |
|
IR portion[%]: |
91.9 |
|
Metalicity : |
-0.0 |
|
Absolute Magnitude: |
13.5 |
|
Apparent Magnitude: |
11.2 |
|
Right Ascension(RA) |
176.9350 |
|
Declination (DEC) |
0.8044 |
|
Hubble Space Telescope Guide Star Catalog (GSC) ID |
00272-01051 |
|
Discovered by |
X. Bonfils et al. |
|
Discovery Paper - Authors |
X. Bonfils et al. |
|
Discovery Paper - Title |
A temperate exo-Earth around a quiet M dwarf at 3.4 parsecs |
|
Discovery Paper - Journal |
Astronomy & Astrophysics manuscript |
|
Discovery Paper - URL |
|
|
SIMBAD LINK |
http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Ross+128+&submit=SIMBAD+search |
|
Open Exoplanet Database Link |
|
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Ross 128 b
Ross 128 b
Ross 128 b is an exoplanet orbiting the star Ross 128, located about 11.0 light-years ( 3.4 pc) away from Solar System. Its discovery was publicly announced on 2017.
The host star Ross 128 has apparent magnitude of 11.2, with absolute magnitude of 13.5. It is 0.2 times more massive and 0.2 times bigger compared with our Sun. The surface temperature is 3192 with its spectral types of M4
In this planetary system, the extrasolar planet Ross 128 b orbits around the star Ross 128 every 9.9 days with its orbital distance of 0.05 AU ( 7420054.4 km)
(Projected orbit of Ross 128 b around its host star Ross 128)
The Star Ross 128 's habitable zone is located at the following distance
Inner Boundary (the orbital distance at Venus's Equivalent Radiation )
: 0.043 AU ( 6495135.8 km)
Earth Boundary (the orbital distance at Earth's Equivalent Radiation)
: 0.060 AU ( 8977975.1 km)
Outer Boundary (the orbital distance at Mars's Equivalent Radiation)
: 0.091 AU ( 13680447.2 km)
Snow Line (the orbital distance at Snow Line Equivalent Radiation)
: 0.135 AU ( 20131377.4 km)
Radiation at Planetary Boundary of Ross 128 b : 2002.17 W/m2
(Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Ross 128)
Kopparapu Recent Venus for Star Ross 128 distance : 0.049 AU
Kopparapu Runaway Greenhouse for Earth-sized planet for Star Ross 128 distance : 0.062 AU
Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Ross 128 distance : 0.060 AU
Kopparapu Runaway Greenhouse for Mars-sized planet for Star Ross 128 distance : 0.066 AU
Kopparapu Outer Boundary for Maximum Greenhouse for Star Ross 128 distance : 0.123 AU
Kopparapu Outer Boundary for Early Mars for Star Ross 128 distance : 0.130 AU
(Habitable zone calculated based on Kopparapu et al.(2013) around the star Ross 128)
Original Kopparapu Recent Venus for Star Ross 128 distance : 0.049 AU
Original Kopparapu Runaway Greenhouse for Star Ross 128 distance : 0.065 AU
Original Kopparapu Moist Greenhouse for Star Ross 128 distance : 0.065 AU
Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Ross 128 distance : 0.125 AU
Original Kopparapu Outer Boundary for Early Mars for Star Ross 128 distance : 0.130 AU
(Habitable zone calculated based on Kopparapu et al.(Original) around the star Ross 128)
(Position in Stellar Map of star Ross 128 and its Exoplanet Ross 128 b)
(Zoomed position in Stellar Map of star Ross 128 and its Exoplanet Ross 128 b (zoom level 3))
(Synthetic Spectrum of star Ross 128*)
*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
