Imaginary Picture of EPIC 212297394 b

Display orbital revolution of EPIC 212297394 b around the hoststar EPIC 212297394
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Exoplanet Name : EPIC 212297394 b
Alternate Name : "2MASS J13484949-1736355 b, EPIC 212297394.02, K2-304 b, WISE J134849.47-173635.6 b"
Status : Confirmed
Radius (Rjup / Re): 0.1180 (Rjup) 1.3227 (Rearth)
Mass (Mjup / Me): 0.0084 (Mjup) 2.6861 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.0319 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0063
Orbital Period(Observed/Estimated) 2.29 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 1.5354
Star Radiation at Atmospheric Boundary: 76400.0 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 742.0 (K)
Blackbody T 0.3(K) 696.8 (K)
Blackbody T 0.7(K) 563.8 (K)
Tidally Locked Blackbody T 0.1(K) 882.4 (K)
Tidally Locked Blackbody T 0.3(K) 828.7 (K)
Size Class: super-Earth-size
Mass Class:
Detection Type : Primary Transit
Mass Detection :
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : EPIC 212297394
Alternate Name : "2MASS J13484949-1736355, K2-304, WISE J134849.47-173635.6"
Star Distance(LY) : 1380.8
Stellar Radius(Rsun) : 0.7 (Rsun Estimated)
Stellar Mass(Msun) : 0.8 (Msun Measured) 0.8 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 3300 (K)
Spectral type : M9
UV portion[%]: 0.2
Visible portion[%]: 11.2
IR portion[%]: 88.6
Metalicity : 0.0
Absolute Magnitude: 4.6
Apparent Magnitude: 12.7
Right Ascension(RA) 207.2062
Declination (DEC) -17.6099
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal
Discovery Paper - URL
SIMBAD LINK
Open Exoplanet Database Link
EPIC 212297394 b
EPIC 212297394 b

  • EPIC 212297394 b is an exoplanet orbiting the star EPIC 212297394, located about 1380.8 light-years (423.4 pc) away from Solar System. Its discovery was publicly announced on 2019.
  • The host star EPIC 212297394 has apparent magnitude of 12.7, with absolute magnitude of 4.6.
  • It is 0.8 times more massive and 0.7 times bigger compared with our Sun. The surface temperature is 3300 with its spectral types of M9
  • In this planetary system, the extrasolar planet EPIC 212297394 b orbits around the star EPIC 212297394 every 2.3 days with its orbital distance of 0.03 AU ( 4779431.1 km)
  • (Projected orbit of EPIC 212297394 b around its host star EPIC 212297394)


  • The Star EPIC 212297394 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.173 AU ( 25843612.4 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.239 AU ( 35722626.1 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.364 AU ( 54433376.7 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.535 AU ( 80101098.4 km)
  • Radiation at Planetary Boundary of EPIC 212297394 b : 76400.01 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star EPIC 212297394)



  • Kopparapu Recent Venus for Star EPIC 212297394 distance : 0.196 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star EPIC 212297394 distance : 0.248 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star EPIC 212297394 distance : 0.239 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star EPIC 212297394 distance : 0.263 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star EPIC 212297394 distance : 0.486 AU
  • Kopparapu Outer Boundary for Early Mars for Star EPIC 212297394 distance : 0.513 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star EPIC 212297394)



  • Original Kopparapu Recent Venus for Star EPIC 212297394 distance : 0.194 AU
  • Original Kopparapu Runaway Greenhouse for Star EPIC 212297394 distance : 0.256 AU
  • Original Kopparapu Moist Greenhouse for Star EPIC 212297394 distance : 0.257 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star EPIC 212297394 distance : 0.494 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star EPIC 212297394 distance : 0.514 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star EPIC 212297394)



    (Position in Stellar Map of star EPIC 212297394 and its Exoplanet EPIC 212297394 b)



    (Zoomed position in Stellar Map of star EPIC 212297394 and its Exoplanet EPIC 212297394 b (zoom level 3))

    (Synthetic Spectrum of star EPIC 212297394*)
    *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