Imaginary Picture of K2-290 b
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Exoplanet Name : K2-290 b
Alternate Name : EPIC 249624646 b
Radius (Rjup / Re): 0.2730 (Rjup) 3.0601 (Rearth)
Mass (Mjup / Me): 0.0664 (Mjup) 21.1111 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0923 (AU) 0.0923 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0252
Orbital Period(Observed/Estimated) 9.21 (Days Obs.) 9.37 (Days Est.)
Star Radiation at Atmospheric Boundary: 518374.9 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1197.6 (K)
Blackbody T 0.3(K) 1124.7 (K)
Blackbody T 0.7(K) 910.0 (K)
Tidally Locked Blackbody T 0.1(K) 1424.2 (K)
Tidally Locked Blackbody T 0.3(K) 1337.4 (K)
Size Class: sub-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 : K2-290
Alternate Name : EPIC 249624646
Star Distance(LY) : 896.9
Stellar Radius(Rsun) : 1.5 (Rsun Measured)
Stellar Mass(Msun) : 1.2 (Msun Measured) 1.2 (Msun Estimated)
Star Age : 4.0 (GY)
Temperature : 6302 (K)
Spectral type : F8
Metalicity : -0.1
Absolute Magnitude: 2.8
Apparent Magnitude: 10.0
Right Ascension(RA) 234.8583
Declination (DEC) -20.1994
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal
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SIMBAD LINK
Open Exoplanet Database Link
K2-290 b
K2-290 b

  • K2-290 b is an exoplanet orbiting the star K2-290, located about 896.9 light-years (275.0 pc) away from Solar System. Its discovery was publicly announced on 2019.
  • The host star K2-290 has apparent magnitude of 10.0, with absolute magnitude of 2.8.
  • It is 1.2 times more massive and 1.5 times bigger compared with our Sun. The surface temperature is 6302 with its spectral types of F8
  • In this planetary system, the extrasolar planet K2-290 b orbits around the star K2-290 every 9.2 days with its orbital distance of 0.09 AU ( 13807883.5 km)
  • (Projected orbit of K2-290 b around its host star K2-290)


  • The Star K2-290 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.300 AU ( 194481983.2 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.797 AU ( 268824925.0 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.738 AU ( 409629694.8 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 4.029 AU ( 602788040.7 km)
  • Radiation at Planetary Boundary of K2-290 b : 518374.86 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star K2-290)



  • Kopparapu Recent Venus for Star K2-290 distance : 1.305 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star K2-290 distance : 1.653 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star K2-290 distance : 1.596 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star K2-290 distance : 1.749 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-290 distance : 2.885 AU
  • Kopparapu Outer Boundary for Early Mars for Star K2-290 distance : 3.043 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star K2-290)



  • Original Kopparapu Recent Venus for Star K2-290 distance : 1.322 AU
  • Original Kopparapu Runaway Greenhouse for Star K2-290 distance : 1.696 AU
  • Original Kopparapu Moist Greenhouse for Star K2-290 distance : 1.749 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-290 distance : 2.937 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star K2-290 distance : 3.054 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star K2-290)



    (Position in Stellar Map of star K2-290 and its Exoplanet K2-290 b)



    (Zoomed position in Stellar Map of star K2-290 and its Exoplanet K2-290 b (zoom level 3))