|
Exoplanet Name : |
82 Eri c |
|
Alternate Name : |
"HD 20794 c, e Eri c" |
|
Status : |
Confirmed |
|
Radius (Rjup / Re): |
0.1143 |
(Rjup) |
1.2811 |
(Rearth) |
|
Mass (Mjup / Me): |
0.0079 |
(Mjup) |
2.5212 |
(Mearth) |
|
Semi Major Axis / Orbital Distance Calculated |
0.2250 |
(AU) |
0.2250 |
(AU Est.) |
|
Eccentricity : |
0.1700 |
|
Orbital Period(Yrs) |
0.1182 |
|
Orbital Period(Observed/Estimated) |
43.17 |
(Days Obs.) |
43.23 |
(Days Est.) |
|
Surface Gravity (G Earth) |
1.5362 |
|
Star Radiation at Atmospheric Boundary: |
17824.4 |
(W/m2) |
|
Measured Temperature (K) |
0.0 |
(K) |
|
Blackbody T 0.1(K) |
515.7 |
(K) |
|
Blackbody T 0.3(K) |
484.3 |
(K) |
|
Blackbody T 0.7(K) |
391.8 |
(K) |
|
Tidally Locked Blackbody T 0.1(K) |
613.3 |
(K) |
|
Tidally Locked Blackbody T 0.3(K) |
575.9 |
(K) |
|
Size Class: |
super-Earth-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 : |
82 Eri |
|
Alternate Name : |
"e Eri, HD 20794, GJ 139" |
|
Star Distance(LY) : |
19.8 |
|
Stellar Radius(Rsun) : |
0.9 |
(Rsun Measured) |
|
Stellar Mass(Msun) : |
0.8 |
(Msun Measured) |
0.8 |
(Msun Estimated) |
|
Star Age : |
14.0 |
(GY) |
|
Temperature : |
5490 |
(K) |
|
Spectral type : |
G8V |
|
UV portion[%]: |
6.8 |
|
Visible portion[%]: |
43.1 |
|
IR portion[%]: |
50.0 |
|
Metalicity : |
-0.4 |
|
Absolute Magnitude: |
5.3 |
|
Apparent Magnitude: |
4.3 |
|
Right Ascension(RA) |
49.9833 |
|
Declination (DEC) |
-43.0697 |
|
Hubble Space Telescope Guide Star Catalog (GSC) ID |
|
|
Discovered by |
|
|
Discovery Paper - Authors |
|
|
Discovery Paper - Title |
|
|
Discovery Paper - Journal |
|
|
Discovery Paper - URL |
|
|
SIMBAD LINK |
|
|
Open Exoplanet Database Link |
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82 Eri c
82 Eri c
82 Eri c is an exoplanet orbiting the star 82 Eri, located about 19.8 light-years ( 6.1 pc) away from Solar System. Its discovery was publicly announced on 2011.
The host star 82 Eri has apparent magnitude of 4.3, with absolute magnitude of 5.3. It is 0.8 times more massive and 0.9 times bigger compared with our Sun. The surface temperature is 5490 with its spectral types of G8V
In this planetary system, the extrasolar planet 82 Eri c orbits around the star 82 Eri every 43.2 days with its orbital distance of 0.23 AU ( 33659520.9 km)
(Projected orbit of 82 Eri c around its host star 82 Eri)
The Star 82 Eri 's habitable zone is located at the following distance
Inner Boundary (the orbital distance at Venus's Equivalent Radiation )
: 0.588 AU ( 87911423.2 km)
Earth Boundary (the orbital distance at Earth's Equivalent Radiation)
: 0.812 AU ( 121516560.8 km)
Outer Boundary (the orbital distance at Mars's Equivalent Radiation)
: 1.238 AU ( 185164347.2 km)
Snow Line (the orbital distance at Snow Line Equivalent Radiation)
: 1.821 AU ( 272477448.4 km)
Radiation at Planetary Boundary of 82 Eri c : 17824.37 W/m2
(Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star 82 Eri)
Kopparapu Recent Venus for Star 82 Eri distance : 0.619 AU
Kopparapu Runaway Greenhouse for Earth-sized planet for Star 82 Eri distance : 0.784 AU
Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star 82 Eri distance : 0.758 AU
Kopparapu Runaway Greenhouse for Mars-sized planet for Star 82 Eri distance : 0.831 AU
Kopparapu Outer Boundary for Maximum Greenhouse for Star 82 Eri distance : 1.397 AU
Kopparapu Outer Boundary for Early Mars for Star 82 Eri distance : 1.473 AU
(Habitable zone calculated based on Kopparapu et al.(2013) around the star 82 Eri)
Original Kopparapu Recent Venus for Star 82 Eri distance : 0.617 AU
Original Kopparapu Runaway Greenhouse for Star 82 Eri distance : 0.807 AU
Original Kopparapu Moist Greenhouse for Star 82 Eri distance : 0.816 AU
Original Kopparapu Outer Boundary for Maximum Greenhouse for Star 82 Eri distance : 1.421 AU
Original Kopparapu Outer Boundary for Early Mars for Star 82 Eri distance : 1.478 AU
(Habitable zone calculated based on Kopparapu et al.(Original) around the star 82 Eri)
(Position in Stellar Map of star 82 Eri and its Exoplanet 82 Eri c)
(Zoomed position in Stellar Map of star 82 Eri and its Exoplanet 82 Eri c (zoom level 3))
(Synthetic Spectrum of star 82 Eri*)
*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
