Imaginary Picture of GJ 676 A d

Display orbital revolution of GJ 676 A d around the hoststar GJ 676 A
/
Exoplanet Name : GJ 676 A d
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.1324 (Rjup) 1.4837 (Rearth)
Mass (Mjup / Me): 0.0140 (Mjup) 4.4511 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0413 (AU) 0.0413 (AU Est.)
Eccentricity : 0.1500
Orbital Period(Yrs) 0.0099
Orbital Period(Observed/Estimated) 3.60 (Days Obs.) 3.64 (Days Est.)
Surface Gravity (G Earth) 2.0221
Star Radiation at Atmospheric Boundary: 54190.6 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 681.0 (K)
Blackbody T 0.3(K) 639.5 (K)
Blackbody T 0.7(K) 517.4 (K)
Tidally Locked Blackbody T 0.1(K) 809.8 (K)
Tidally Locked Blackbody T 0.3(K) 760.5 (K)
Size Class: super-Earth-size
Mass Class:
Detection Type : Radial Velocity
Mass Detection :
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : GJ 676 A
Alternate Name :
Star Distance(LY) : 51.7
Stellar Radius(Rsun) : 0.6 (Rsun Estimated)
Stellar Mass(Msun) : 0.7 (Msun Measured) 0.7 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 3750 (K)
Spectral type : M0V
UV portion[%]: 0.4
Visible portion[%]: 18.9
IR portion[%]: 80.7
Metalicity : 0.2
Absolute Magnitude: 8.6
Apparent Magnitude: 9.6
Right Ascension(RA) 262.5467
Declination (DEC) -51.6369
Hubble Space Telescope Guide Star Catalog (GSC) ID
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+676+A+&submit=SIMBAD+search
Open Exoplanet Database Link 0
GJ 676 A d
GJ 676 A d

  • GJ 676 A d is an exoplanet orbiting the star GJ 676 A, located about 51.7 light-years (15.9 pc) away from Solar System. Its discovery was publicly announced on 2012.
  • The host star GJ 676 A has apparent magnitude of 9.6, with absolute magnitude of 8.6.
  • It is 0.7 times more massive and 0.6 times bigger compared with our Sun. The surface temperature is 3750 with its spectral types of M0V
  • In this planetary system, the extrasolar planet GJ 676 A d orbits around the star GJ 676 A every 3.6 days with its orbital distance of 0.04 AU ( 6178392.1 km)
  • (Projected orbit of GJ 676 A d around its host star GJ 676 A)


  • The Star GJ 676 A 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.188 AU ( 28136347.1 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.260 AU ( 38891784.6 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.396 AU ( 59262473.0 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.583 AU ( 87207325.2 km)
  • Radiation at Planetary Boundary of GJ 676 A d : 54190.59 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star GJ 676 A)



  • Kopparapu Recent Venus for Star GJ 676 A distance : 0.212 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star GJ 676 A distance : 0.268 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star GJ 676 A distance : 0.259 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star GJ 676 A distance : 0.285 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star GJ 676 A distance : 0.515 AU
  • Kopparapu Outer Boundary for Early Mars for Star GJ 676 A distance : 0.543 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star GJ 676 A)



  • Original Kopparapu Recent Venus for Star GJ 676 A distance : 0.210 AU
  • Original Kopparapu Runaway Greenhouse for Star GJ 676 A distance : 0.277 AU
  • Original Kopparapu Moist Greenhouse for Star GJ 676 A distance : 0.277 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star GJ 676 A distance : 0.523 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star GJ 676 A distance : 0.544 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star GJ 676 A)



    (Position in Stellar Map of star GJ 676 A and its Exoplanet GJ 676 A d)



    (Zoomed position in Stellar Map of star GJ 676 A and its Exoplanet GJ 676 A d (zoom level 3))

    (Synthetic Spectrum of star GJ 676 A*)
    *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