Imaginary Picture of Kepler-1730 b

Display orbital revolution of Kepler-1730 b around the hoststar Kepler-1730
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Exoplanet Name : Kepler-1730 b
Alternate Name : "KOI-900 b, KOI-900.01"
Status : Confirmed
Radius (Rjup / Re): 0.4001 (Rjup) 4.4851 (Rearth)
Mass (Mjup / Me): 0.0628 (Mjup) 19.9652 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.1131 (AU) 0.1131 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0378
Orbital Period(Observed/Estimated) 13.81 (Days Obs.) 13.96 (Days Est.)
Surface Gravity (G Earth) 0.9925
Star Radiation at Atmospheric Boundary: 126249.1 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 841.3 (K)
Blackbody T 0.3(K) 790.1 (K)
Blackbody T 0.7(K) 639.2 (K)
Tidally Locked Blackbody T 0.1(K) 1000.5 (K)
Tidally Locked Blackbody T 0.3(K) 939.6 (K)
Size Class: Neptune-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 : Kepler-1730
Alternate Name : "7938496, KOI-900, 2MASS J18475055+4342112"
Star Distance(LY) : 4654.5
Stellar Radius(Rsun) : 1.2 (Rsun Measured)
Stellar Mass(Msun) : 1.0 (Msun Measured) 1.0 (Msun Estimated)
Star Age : 7.4 (GY)
Temperature : 5598 (K)
Spectral type : G4V
UV portion[%]: 7.3
Visible portion[%]: 43.9
IR portion[%]: 48.9
Metalicity : -0.0
Absolute Magnitude: 4.4
Apparent Magnitude: 15.2
Right Ascension(RA) 281.9606
Declination (DEC) 43.7031
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-1730 b
Kepler-1730 b

  • Kepler-1730 b is an exoplanet orbiting the star Kepler-1730, located about 4654.5 light-years (1427.1 pc) away from Solar System. Its discovery was publicly announced on 2017.
  • The host star Kepler-1730 has apparent magnitude of 15.2, with absolute magnitude of 4.4.
  • It is 1.0 times more massive and 1.2 times bigger compared with our Sun. The surface temperature is 5598 with its spectral types of G4V
  • In this planetary system, the extrasolar planet Kepler-1730 b orbits around the star Kepler-1730 every 13.8 days with its orbital distance of 0.11 AU ( 16919519.2 km)
  • (Projected orbit of Kepler-1730 b around its host star Kepler-1730)


  • The Star Kepler-1730 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.786 AU ( 117606807.3 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.087 AU ( 162563342.0 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.656 AU ( 247710558.0 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.437 AU ( 364516937.6 km)
  • Radiation at Planetary Boundary of Kepler-1730 b : 126249.10 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-1730)



  • Kopparapu Recent Venus for Star Kepler-1730 distance : 0.824 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-1730 distance : 1.043 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-1730 distance : 1.007 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-1730 distance : 1.105 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1730 distance : 1.851 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-1730 distance : 1.952 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-1730)



  • Original Kopparapu Recent Venus for Star Kepler-1730 distance : 0.822 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-1730 distance : 1.072 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-1730 distance : 1.087 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1730 distance : 1.883 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-1730 distance : 1.958 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-1730)



    (Position in Stellar Map of star Kepler-1730 and its Exoplanet Kepler-1730 b)



    (Zoomed position in Stellar Map of star Kepler-1730 and its Exoplanet Kepler-1730 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-1730*)
    *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