Imaginary Picture of Kepler-1844 b

Display orbital revolution of Kepler-1844 b around the hoststar Kepler-1844
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Exoplanet Name : Kepler-1844 b
Alternate Name : "KOI-2489 b, KOI-2489.01"
Status : Confirmed
Radius (Rjup / Re): 0.2734 (Rjup) 3.0648 (Rearth)
Mass (Mjup / Me): 0.0235 (Mjup) 7.4760 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0478 (AU) 0.0478 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0107
Orbital Period(Observed/Estimated) 3.92 (Days Obs.) 3.82 (Days Est.)
Surface Gravity (G Earth) 0.7959
Star Radiation at Atmospheric Boundary: 1002448.9 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1412.2 (K)
Blackbody T 0.3(K) 1326.2 (K)
Blackbody T 0.7(K) 1073.1 (K)
Tidally Locked Blackbody T 0.1(K) 1679.4 (K)
Tidally Locked Blackbody T 0.3(K) 1577.2 (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-1844
Alternate Name : "KIC 2718778, KOI-2489"
Star Distance(LY) : 5885.0
Stellar Radius(Rsun) : 1.4 (Rsun Measured)
Stellar Mass(Msun) : 1.0 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5633 (K)
Spectral type : G3IV-V
UV portion[%]: 7.4
Visible portion[%]: 44.1
IR portion[%]: 48.5
Metalicity : -0.2
Absolute Magnitude: 4.7
Apparent Magnitude: 16.0
Right Ascension(RA) 292.6904
Declination (DEC) 37.9346
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-1844 b
Kepler-1844 b

  • Kepler-1844 b is an exoplanet orbiting the star Kepler-1844, located about 5885.0 light-years (1804.4 pc) away from Solar System. Its discovery was publicly announced on 2017.
  • The host star Kepler-1844 has apparent magnitude of 16.0, with absolute magnitude of 4.7.
  • It is 1.0 times more massive and 1.4 times bigger compared with our Sun. The surface temperature is 5633 with its spectral types of G3IV-V
  • In this planetary system, the extrasolar planet Kepler-1844 b orbits around the star Kepler-1844 every 3.9 days with its orbital distance of 0.05 AU ( 7150778.2 km)
  • (Projected orbit of Kepler-1844 b around its host star Kepler-1844)


  • The Star Kepler-1844 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.936 AU ( 140060193.7 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.294 AU ( 193599789.7 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.972 AU ( 295003236.0 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.902 AU ( 434110185.1 km)
  • Radiation at Planetary Boundary of Kepler-1844 b : 1002448.89 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-1844)



  • Kopparapu Recent Venus for Star Kepler-1844 distance : 0.979 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-1844 distance : 1.239 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-1844 distance : 1.197 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-1844 distance : 1.313 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1844 distance : 2.198 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-1844 distance : 2.318 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-1844)



  • Original Kopparapu Recent Venus for Star Kepler-1844 distance : 0.977 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-1844 distance : 1.274 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-1844 distance : 1.293 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1844 distance : 2.236 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-1844 distance : 2.325 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-1844)



    (Position in Stellar Map of star Kepler-1844 and its Exoplanet Kepler-1844 b)



    (Zoomed position in Stellar Map of star Kepler-1844 and its Exoplanet Kepler-1844 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-1844*)
    *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