Imaginary Picture of Kepler-1812 b

Display orbital revolution of Kepler-1812 b around the hoststar Kepler-1812
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Exoplanet Name : Kepler-1812 b
Alternate Name : "KOI-2241 b, KOI-2241.01"
Status : Confirmed
Radius (Rjup / Re): 0.2074 (Rjup) 2.3249 (Rearth)
Mass (Mjup / Me): 0.0182 (Mjup) 5.7819 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0765 (AU) 0.0765 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0196
Orbital Period(Observed/Estimated) 7.17 (Days Obs.) 6.94 (Days Est.)
Surface Gravity (G Earth) 1.0697
Star Radiation at Atmospheric Boundary: 442823.2 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1151.3 (K)
Blackbody T 0.3(K) 1081.2 (K)
Blackbody T 0.7(K) 874.8 (K)
Tidally Locked Blackbody T 0.1(K) 1369.2 (K)
Tidally Locked Blackbody T 0.3(K) 1285.8 (K)
Size Class: sub-Neptune-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 : Kepler-1812
Alternate Name : "KIC 5125347, KOI-2241"
Star Distance(LY) : 4596.2
Stellar Radius(Rsun) : 1.2 (Rsun Measured)
Stellar Mass(Msun) : 1.2 (Msun Measured) 1.2 (Msun Estimated)
Star Age : 1.0 (GY)
Temperature : 6317 (K)
Spectral type : F7V
UV portion[%]: 0.3
Visible portion[%]: 1.5
IR portion[%]: 98.2
Metalicity : 0.1
Absolute Magnitude: 4.9
Apparent Magnitude: 15.6
Right Ascension(RA) 298.0845
Declination (DEC) 40.2832
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
Kepler-1812 b
Kepler-1812 b

  • Kepler-1812 b is an exoplanet orbiting the star Kepler-1812, located about 4596.2 light-years (1409.2 pc) away from Solar System. Its discovery was publicly announced on 2017.
  • The host star Kepler-1812 has apparent magnitude of 15.6, with absolute magnitude of 4.9.
  • It is 1.2 times more massive and 1.2 times bigger compared with our Sun. The surface temperature is 6317 with its spectral types of F7V
  • In this planetary system, the extrasolar planet Kepler-1812 b orbits around the star Kepler-1812 every 7.2 days with its orbital distance of 0.08 AU ( 11444237.1 km)
  • (Projected orbit of Kepler-1812 b around its host star Kepler-1812)


  • The Star Kepler-1812 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.996 AU ( 148981500.9 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.377 AU ( 205931367.8 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.098 AU ( 313793832.0 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 3.087 AU ( 461761370.3 km)
  • Radiation at Planetary Boundary of Kepler-1812 b : 442823.24 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-1812)



  • Kopparapu Recent Venus for Star Kepler-1812 distance : 0.999 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-1812 distance : 1.265 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-1812 distance : 1.222 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-1812 distance : 1.339 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1812 distance : 2.207 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-1812 distance : 2.328 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-1812)



  • Original Kopparapu Recent Venus for Star Kepler-1812 distance : 1.012 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-1812 distance : 1.298 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-1812 distance : 1.339 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1812 distance : 2.247 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-1812 distance : 2.337 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-1812)



    (Position in Stellar Map of star Kepler-1812 and its Exoplanet Kepler-1812 b)



    (Zoomed position in Stellar Map of star Kepler-1812 and its Exoplanet Kepler-1812 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-1812*)
    *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