Imaginary Picture of K2-105 b
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Exoplanet Name : K2-105 b
Alternate Name :
Radius (Rjup / Re): 0.3200 (Rjup) 3.5869 (Rearth)
Mass (Mjup / Me): 0.0940 (Mjup) 29.8862 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.0803 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0226
Orbital Period(Observed/Estimated) 8.27 (Days Obs.) 0.00 (Days Est.)
Star Radiation at Atmospheric Boundary: 149731.4 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 878.0 (K)
Blackbody T 0.3(K) 824.5 (K)
Blackbody T 0.7(K) 667.1 (K)
Tidally Locked Blackbody T 0.1(K) 1044.1 (K)
Tidally Locked Blackbody T 0.3(K) 980.5 (K)
Size Class: Neptune-size
Mass Class:
Detection Type : Primary Transit
Mass Detection : Radial Velocity
Radius Detection : Primary Transit
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : K2-105
Alternate Name :
Star Distance(LY) : 717.5
Stellar Radius(Rsun) : 0.9 (Rsun Measured)
Stellar Mass(Msun) : 1.0 (Msun Measured) 1.0 (Msun Estimated)
Star Age : 0.6 (GY)
Temperature : 5434 (K)
Spectral type : G7
Metalicity : 0.3
Absolute Magnitude: 5.3
Apparent Magnitude: 12.0
Right Ascension(RA) 125.4203
Declination (DEC) 13.4975
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=K2-105&submit=SIMBAD+search
Open Exoplanet Database Link
K2-105 b
K2-105 b

  • K2-105 b is an exoplanet orbiting the star K2-105, located about 717.5 light-years (220.0 pc) away from Solar System. Its discovery was publicly announced on 2017.
  • The host star K2-105 has apparent magnitude of 12.0, with absolute magnitude of 5.3.
  • It is 1.0 times more massive and 0.9 times bigger compared with our Sun. The surface temperature is 5434 with its spectral types of G7
  • In this planetary system, the extrasolar planet K2-105 b orbits around the star K2-105 every 8.3 days with its orbital distance of 0.08 AU ( 12009757.7 km)
  • (Projected orbit of K2-105 b around its host star K2-105)


  • The Star K2-105 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.608 AU ( 90911952.7 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.840 AU ( 125664076.7 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.280 AU ( 191484243.5 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.884 AU ( 281777452.7 km)
  • Radiation at Planetary Boundary of K2-105 b : 149731.40 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star K2-105)



  • Kopparapu Recent Venus for Star K2-105 distance : 0.643 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star K2-105 distance : 0.814 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star K2-105 distance : 0.786 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star K2-105 distance : 0.862 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-105 distance : 1.452 AU
  • Kopparapu Outer Boundary for Early Mars for Star K2-105 distance : 1.531 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star K2-105)



  • Original Kopparapu Recent Venus for Star K2-105 distance : 0.639 AU
  • Original Kopparapu Runaway Greenhouse for Star K2-105 distance : 0.837 AU
  • Original Kopparapu Moist Greenhouse for Star K2-105 distance : 0.846 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-105 distance : 1.477 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star K2-105 distance : 1.536 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star K2-105)



    (Position in Stellar Map of star K2-105 and its Exoplanet K2-105 b)



    (Zoomed position in Stellar Map of star K2-105 and its Exoplanet K2-105 b (zoom level 3))