Imaginary Picture of Kepler-1773 b

Display orbital revolution of Kepler-1773 b around the hoststar Kepler-1773
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Exoplanet Name : Kepler-1773 b
Alternate Name : "KOI-1878 b, KOI-1878.01"
Status : Confirmed
Radius (Rjup / Re): 0.3127 (Rjup) 3.5047 (Rearth)
Mass (Mjup / Me): 0.0266 (Mjup) 8.4692 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.2489 (AU) 0.2489 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.1117
Orbital Period(Observed/Estimated) 40.81 (Days Obs.) 42.11 (Days Est.)
Surface Gravity (G Earth) 0.6895
Star Radiation at Atmospheric Boundary: 55787.2 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 685.9 (K)
Blackbody T 0.3(K) 644.2 (K)
Blackbody T 0.7(K) 521.2 (K)
Tidally Locked Blackbody T 0.1(K) 815.7 (K)
Tidally Locked Blackbody T 0.3(K) 766.0 (K)
Size Class: 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-1773
Alternate Name : "3098810, KOI-1878"
Star Distance(LY) : 2222.0
Stellar Radius(Rsun) : 1.4 (Rsun Measured)
Stellar Mass(Msun) : 1.2 (Msun Measured) 1.2 (Msun Estimated)
Star Age : 2.9 (GY)
Temperature : 6136 (K)
Spectral type : F8IV-V
UV portion[%]: 0.3
Visible portion[%]: 1.5
IR portion[%]: 98.2
Metalicity : 0.3
Absolute Magnitude: 3.9
Apparent Magnitude: 13.1
Right Ascension(RA) 286.2232
Declination (DEC) 38.2582
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-1773 b
Kepler-1773 b

  • Kepler-1773 b is an exoplanet orbiting the star Kepler-1773, located about 2222.0 light-years (681.3 pc) away from Solar System. Its discovery was publicly announced on 2017.
  • The host star Kepler-1773 has apparent magnitude of 13.1, with absolute magnitude of 3.9.
  • It is 1.2 times more massive and 1.4 times bigger compared with our Sun. The surface temperature is 6136 with its spectral types of F8IV-V
  • In this planetary system, the extrasolar planet Kepler-1773 b orbits around the star Kepler-1773 every 40.8 days with its orbital distance of 0.25 AU ( 37234910.0 km)
  • (Projected orbit of Kepler-1773 b around its host star Kepler-1773)


  • The Star Kepler-1773 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.150 AU ( 172047326.0 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.590 AU ( 237814365.8 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.422 AU ( 362376465.3 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 3.565 AU ( 533252843.4 km)
  • Radiation at Planetary Boundary of Kepler-1773 b : 55787.21 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-1773)



  • Kopparapu Recent Venus for Star Kepler-1773 distance : 1.166 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-1773 distance : 1.477 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-1773 distance : 1.426 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-1773 distance : 1.563 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1773 distance : 2.586 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-1773 distance : 2.728 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-1773)



  • Original Kopparapu Recent Venus for Star Kepler-1773 distance : 1.177 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-1773 distance : 1.516 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-1773 distance : 1.557 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1773 distance : 2.633 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-1773 distance : 2.738 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-1773)



    (Position in Stellar Map of star Kepler-1773 and its Exoplanet Kepler-1773 b)



    (Zoomed position in Stellar Map of star Kepler-1773 and its Exoplanet Kepler-1773 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-1773*)
    *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