Imaginary Picture of K2-30 b

Display orbital revolution of K2-30 b around the hoststar K2-30
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Exoplanet Name : K2-30 b
Alternate Name : "2MASS J03292204+2217577 b, EPIC 210957318 b, EPIC 210957318.01, WISE J032922.08+221757.7 b"
Radius (Rjup / Re): 1.0390 (Rjup) 11.6462 (Rearth)
Mass (Mjup / Me): 0.5790 (Mjup) 184.0861 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0484 (AU) 0.0484 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0112
Orbital Period(Observed/Estimated) 4.10 (Days Obs.) 4.10 (Days Est.)
Surface Gravity (G Earth) 1.3572
Star Radiation at Atmospheric Boundary: 320074.5 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1061.6 (K)
Blackbody T 0.3(K) 996.9 (K)
Blackbody T 0.7(K) 806.6 (K)
Tidally Locked Blackbody T 0.1(K) 1262.4 (K)
Tidally Locked Blackbody T 0.3(K) 1185.6 (K)
Size Class: Jupiter-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 : K2-30
Alternate Name : "2MASS J03292204+2217577, EPIC 210957318, WISE J032922.08+221757.7"
Star Distance(LY) : 1096.7
Stellar Radius(Rsun) : 0.8 (Rsun Measured)
Stellar Mass(Msun) : 0.9 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 3.9 (GY)
Temperature : 5425 (K)
Spectral type : G6 V
UV portion[%]: 6.5
Visible portion[%]: 42.6
IR portion[%]: 50.8
Metalicity : -0.1
Absolute Magnitude: 5.9
Apparent Magnitude: 13.5
Right Ascension(RA) 52.3419
Declination (DEC) 22.2994
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=K2-30+&submit=SIMBAD+search
Open Exoplanet Database Link
K2-30 b
K2-30 b

  • K2-30 b is an exoplanet orbiting the star K2-30, located about 1096.7 light-years (336.3 pc) away from Solar System. Its discovery was publicly announced on 2016.
  • The host star K2-30 has apparent magnitude of 13.5, with absolute magnitude of 5.9.
  • It is 0.9 times more massive and 0.8 times bigger compared with our Sun. The surface temperature is 5425 with its spectral types of G6 V
  • In this planetary system, the extrasolar planet K2-30 b orbits around the star K2-30 every 4.1 days with its orbital distance of 0.05 AU ( 7239041.0 km)
  • (Projected orbit of K2-30 b around its host star K2-30)


  • The Star K2-30 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.536 AU ( 80119251.5 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.740 AU ( 110745743.3 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.128 AU ( 168752004.8 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.660 AU ( 248325967.6 km)
  • Radiation at Planetary Boundary of K2-30 b : 320074.52 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star K2-30)



  • Kopparapu Recent Venus for Star K2-30 distance : 0.567 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star K2-30 distance : 0.718 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star K2-30 distance : 0.693 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star K2-30 distance : 0.760 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-30 distance : 1.280 AU
  • Kopparapu Outer Boundary for Early Mars for Star K2-30 distance : 1.351 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star K2-30)



  • Original Kopparapu Recent Venus for Star K2-30 distance : 0.564 AU
  • Original Kopparapu Runaway Greenhouse for Star K2-30 distance : 0.738 AU
  • Original Kopparapu Moist Greenhouse for Star K2-30 distance : 0.746 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-30 distance : 1.303 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star K2-30 distance : 1.355 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star K2-30)



    (Position in Stellar Map of star K2-30 and its Exoplanet K2-30 b)



    (Zoomed position in Stellar Map of star K2-30 and its Exoplanet K2-30 b (zoom level 3))

    (Synthetic Spectrum of star K2-30*)
    *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