|
Exoplanet Name : |
GJ 876 b |
|
Alternate Name : |
|
|
Status : |
Confirmed |
|
Radius (Rjup / Re): |
0.9078 |
(Rjup) |
10.1759 |
(Rearth) |
|
Mass (Mjup / Me): |
3.6000 |
(Mjup) |
1144.5768 |
(Mearth) |
|
Semi Major Axis / Orbital Distance Calculated |
0.2140 |
(AU) |
0.2140 |
(AU Est.) |
|
Eccentricity : |
0.0020 |
|
Orbital Period(Yrs) |
0.1671 |
|
Orbital Period(Observed/Estimated) |
61.03 |
(Days Obs.) |
62.57 |
(Days Est.) |
|
Surface Gravity (G Earth) |
11.0536 |
|
Star Radiation at Atmospheric Boundary: |
437.1 |
(W/m2) |
|
Measured Temperature (K) |
0.0 |
(K) |
|
Blackbody T 0.1(K) |
204.1 |
(K) |
|
Blackbody T 0.3(K) |
191.6 |
(K) |
|
Blackbody T 0.7(K) |
155.1 |
(K) |
|
Tidally Locked Blackbody T 0.1(K) |
242.7 |
(K) |
|
Tidally Locked Blackbody T 0.3(K) |
227.9 |
(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 : |
GJ 876 |
|
Alternate Name : |
|
|
Star Distance(LY) : |
15.3 |
|
Stellar Radius(Rsun) : |
0.4 |
(Rsun Measured) |
|
Stellar Mass(Msun) : |
0.3 |
(Msun Measured) |
0.4 |
(Msun Estimated) |
|
Star Age : |
2.5 |
(GY) |
|
Temperature : |
3350 |
(K) |
|
Spectral type : |
M4 V |
|
UV portion[%]: |
0.1 |
|
Visible portion[%]: |
6.5 |
|
IR portion[%]: |
93.4 |
|
Metalicity : |
0.1 |
|
Absolute Magnitude: |
11.8 |
|
Apparent Magnitude: |
10.2 |
|
Right Ascension(RA) |
343.3197 |
|
Declination (DEC) |
-14.2536 |
|
Hubble Space Telescope Guide Star Catalog (GSC) ID |
05819-00957 |
|
Discovered by |
|
|
Discovery Paper - Authors |
0 |
|
Discovery Paper - Title |
0 |
|
Discovery Paper - Journal |
0 |
|
Discovery Paper - URL |
0 |
|
SIMBAD LINK |
http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=GJ+876+&submit=SIMBAD+search |
|
Open Exoplanet Database Link |
0 |
 |
 |
 |
 |
/
GJ 876 b
GJ 876 b
GJ 876 b is an exoplanet orbiting the star GJ 876, located about 15.3 light-years ( 4.7 pc) away from Solar System. Its discovery was publicly announced on 2000.
The host star GJ 876 has apparent magnitude of 10.2, with absolute magnitude of 11.8. It is 0.3 times more massive and 0.4 times bigger compared with our Sun. The surface temperature is 3350 with its spectral types of M4 V
In this planetary system, the extrasolar planet GJ 876 b orbits around the star GJ 876 every 61.0 days with its orbital distance of 0.21 AU ( 32013944.3 km)
(Projected orbit of GJ 876 b around its host star GJ 876)
The Star GJ 876 's habitable zone is located at the following distance
Inner Boundary (the orbital distance at Venus's Equivalent Radiation )
: 0.088 AU ( 13093333.4 km)
Earth Boundary (the orbital distance at Earth's Equivalent Radiation)
: 0.121 AU ( 18098408.5 km)
Outer Boundary (the orbital distance at Mars's Equivalent Radiation)
: 0.184 AU ( 27577969.4 km)
Snow Line (the orbital distance at Snow Line Equivalent Radiation)
: 0.271 AU ( 40582190.0 km)
Radiation at Planetary Boundary of GJ 876 b : 437.08 W/m2
(Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star GJ 876)
Kopparapu Recent Venus for Star GJ 876 distance : 0.099 AU
Kopparapu Runaway Greenhouse for Earth-sized planet for Star GJ 876 distance : 0.125 AU
Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star GJ 876 distance : 0.121 AU
Kopparapu Runaway Greenhouse for Mars-sized planet for Star GJ 876 distance : 0.133 AU
Kopparapu Outer Boundary for Maximum Greenhouse for Star GJ 876 distance : 0.246 AU
Kopparapu Outer Boundary for Early Mars for Star GJ 876 distance : 0.259 AU
(Habitable zone calculated based on Kopparapu et al.(2013) around the star GJ 876)
Original Kopparapu Recent Venus for Star GJ 876 distance : 0.098 AU
Original Kopparapu Runaway Greenhouse for Star GJ 876 distance : 0.130 AU
Original Kopparapu Moist Greenhouse for Star GJ 876 distance : 0.130 AU
Original Kopparapu Outer Boundary for Maximum Greenhouse for Star GJ 876 distance : 0.250 AU
Original Kopparapu Outer Boundary for Early Mars for Star GJ 876 distance : 0.260 AU
(Habitable zone calculated based on Kopparapu et al.(Original) around the star GJ 876)
(Position in Stellar Map of star GJ 876 and its Exoplanet GJ 876 b)
(Zoomed position in Stellar Map of star GJ 876 and its Exoplanet GJ 876 b (zoom level 3))
(Synthetic Spectrum of star GJ 876*)
*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
