Imaginary Picture of Kepler-1801 b

Display orbital revolution of Kepler-1801 b around the hoststar Kepler-1801
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Exoplanet Name : Kepler-1801 b
Alternate Name : "KOI-2172 b, KOI-2172.01"
Status : Confirmed
Radius (Rjup / Re): 0.2417 (Rjup) 2.7092 (Rearth)
Mass (Mjup / Me): 0.0210 (Mjup) 6.6659 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0915 (AU) 0.0915 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0286
Orbital Period(Observed/Estimated) 10.44 (Days Obs.) 10.37 (Days Est.)
Surface Gravity (G Earth) 0.9082
Star Radiation at Atmospheric Boundary: 97269.7 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 788.2 (K)
Blackbody T 0.3(K) 740.2 (K)
Blackbody T 0.7(K) 598.9 (K)
Tidally Locked Blackbody T 0.1(K) 937.3 (K)
Tidally Locked Blackbody T 0.3(K) 880.3 (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-1801
Alternate Name : 4173026
Star Distance(LY) : 2737.5
Stellar Radius(Rsun) : 0.9 (Rsun Measured)
Stellar Mass(Msun) : 0.9 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 8.1 (GY)
Temperature : 5455 (K)
Spectral type : G5V
UV portion[%]: 6.7
Visible portion[%]: 42.9
IR portion[%]: 50.4
Metalicity : -0.1
Absolute Magnitude: 5.7
Apparent Magnitude: 15.3
Right Ascension(RA) 295.1640
Declination (DEC) 39.2014
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-1801 b
Kepler-1801 b

  • Kepler-1801 b is an exoplanet orbiting the star Kepler-1801, located about 2737.5 light-years (839.3 pc) away from Solar System. Its discovery was publicly announced on 2017.
  • The host star Kepler-1801 has apparent magnitude of 15.3, with absolute magnitude of 5.7.
  • It is 0.9 times more massive and 0.9 times bigger compared with our Sun. The surface temperature is 5455 with its spectral types of G5V
  • In this planetary system, the extrasolar planet Kepler-1801 b orbits around the star Kepler-1801 every 10.4 days with its orbital distance of 0.09 AU ( 13688205.2 km)
  • (Projected orbit of Kepler-1801 b around its host star Kepler-1801)


  • The Star Kepler-1801 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.558 AU ( 83515197.9 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.772 AU ( 115439828.6 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.176 AU ( 175904752.0 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.730 AU ( 258851548.4 km)
  • Radiation at Planetary Boundary of Kepler-1801 b : 97269.67 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-1801)



  • Kopparapu Recent Venus for Star Kepler-1801 distance : 0.590 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-1801 distance : 0.747 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-1801 distance : 0.721 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-1801 distance : 0.791 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1801 distance : 1.331 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-1801 distance : 1.404 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-1801)



  • Original Kopparapu Recent Venus for Star Kepler-1801 distance : 0.587 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-1801 distance : 0.768 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-1801 distance : 0.777 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1801 distance : 1.354 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-1801 distance : 1.408 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-1801)



    (Position in Stellar Map of star Kepler-1801 and its Exoplanet Kepler-1801 b)



    (Zoomed position in Stellar Map of star Kepler-1801 and its Exoplanet Kepler-1801 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-1801*)
    *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