Imaginary Picture of KOI-6656 b

Display orbital revolution of KOI-6656 b around the hoststar 2MASS J19342555+4118226
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Exoplanet Name : KOI-6656 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.1540 (Rjup) 1.7262 (Rearth)
Mass (Mjup / Me): 0.0138 (Mjup) 4.3833 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0153 (AU) 0.0153 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0016
Orbital Period(Observed/Estimated) 0.58 (Days Obs.) 0.58 (Days Est.)
Surface Gravity (G Earth) 1.4711
Star Radiation at Atmospheric Boundary: 43189470.1 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 3618.2 (K)
Blackbody T 0.3(K) 3397.8 (K)
Blackbody T 0.7(K) 2749.2 (K)
Tidally Locked Blackbody T 0.1(K) 4302.7 (K)
Tidally Locked Blackbody T 0.3(K) 4040.7 (K)
Size Class: super-Earth-size
Mass Class:
Detection Type : Primary Transit
Mass Detection :
Radius Detection : Primary Transit
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : 2MASS J19342555+4118226
Alternate Name : 6048255
Star Distance(LY) : 4947.0
Stellar Radius(Rsun) : 1.7 (Rsun Measured)
Stellar Mass(Msun) : 1.4 (Msun Measured) 1.4 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 7289 (K)
Spectral type : F0
UV portion[%]: 7.8
Visible portion[%]: 44.8
IR portion[%]: 47.4
Metalicity : -0.2
Absolute Magnitude: 2.9
Apparent Magnitude: 13.8
Right Ascension(RA) 293.6065
Declination (DEC) 41.3063
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal
Discovery Paper - URL
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=2MASS+J19342555%2B4118226&submit=SIMBAD+search
Open Exoplanet Database Link
KOI-6656 b
KOI-6656 b

  • KOI-6656 b is an exoplanet orbiting the star 2MASS J19342555+4118226, located about 4947.0 light-years (1516.8 pc) away from Solar System. Its discovery was publicly announced on 2017.
  • The host star 2MASS J19342555+4118226 has apparent magnitude of 13.8, with absolute magnitude of 2.9.
  • It is 1.4 times more massive and 1.7 times bigger compared with our Sun. The surface temperature is 7289 with its spectral types of F0
  • In this planetary system, the extrasolar planet KOI-6656 b orbits around the star 2MASS J19342555+4118226 every 0.6 days with its orbital distance of 0.02 AU ( 2288847.4 km)
  • (Projected orbit of KOI-6656 b around its host star 2MASS J19342555+4118226)


  • The Star 2MASS J19342555+4118226 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.967 AU ( 294263282.8 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 2.719 AU ( 406748757.0 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 4.143 AU ( 619795092.4 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 6.097 AU ( 912055629.9 km)
  • Radiation at Planetary Boundary of KOI-6656 b : 43189470.07 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star 2MASS J19342555+4118226)



  • Kopparapu Recent Venus for Star 2MASS J19342555+4118226 distance : 1.877 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star 2MASS J19342555+4118226 distance : 2.378 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star 2MASS J19342555+4118226 distance : 2.296 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star 2MASS J19342555+4118226 distance : 2.514 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star 2MASS J19342555+4118226 distance : 4.104 AU
  • Kopparapu Outer Boundary for Early Mars for Star 2MASS J19342555+4118226 distance : 4.329 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star 2MASS J19342555+4118226)



  • Original Kopparapu Recent Venus for Star 2MASS J19342555+4118226 distance : 1.940 AU
  • Original Kopparapu Runaway Greenhouse for Star 2MASS J19342555+4118226 distance : 2.432 AU
  • Original Kopparapu Moist Greenhouse for Star 2MASS J19342555+4118226 distance : 2.566 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star 2MASS J19342555+4118226 distance : 4.180 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star 2MASS J19342555+4118226 distance : 4.346 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star 2MASS J19342555+4118226)



    (Position in Stellar Map of star 2MASS J19342555+4118226 and its Exoplanet KOI-6656 b)



    (Zoomed position in Stellar Map of star 2MASS J19342555+4118226 and its Exoplanet KOI-6656 b (zoom level 3))

    (Synthetic Spectrum of star 2MASS J19342555+4118226*)
    *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