Imaginary Picture of Kepler-577 b

Display orbital revolution of Kepler-577 b around the hoststar Kepler-577
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Exoplanet Name : Kepler-577 b
Alternate Name : "2MASS J19385086+3904255 b, K00494.01, KIC 3966801 b, KOI-494 b, KOI-494.01, WISE J193850.88+390425.4 b"
Status : Confirmed
Radius (Rjup / Re): 0.2270 (Rjup) 2.5444 (Rearth)
Mass (Mjup / Me): 0.0198 (Mjup) 6.2880 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.1569 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0703
Orbital Period(Observed/Estimated) 25.70 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 0.9712
Star Radiation at Atmospheric Boundary: 5746.6 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 388.6 (K)
Blackbody T 0.3(K) 364.9 (K)
Blackbody T 0.7(K) 295.3 (K)
Tidally Locked Blackbody T 0.1(K) 462.1 (K)
Tidally Locked Blackbody T 0.3(K) 434.0 (K)
Size Class: sub-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-577
Alternate Name : "2MASS J19385086+3904255, KIC 3966801, KOI-494, WISE J193850.88+390425.4"
Star Distance(LY) : 1709.5
Stellar Radius(Rsun) : 0.7 (Rsun Measured)
Stellar Mass(Msun) : 0.8 (Msun Measured) 0.8 (Msun Estimated)
Star Age : 3.8 (GY)
Temperature : 3789 (K)
Spectral type : K2
UV portion[%]: 3.2
Visible portion[%]: 36.9
IR portion[%]: 59.9
Metalicity : -0.1
Absolute Magnitude: 4.8
Apparent Magnitude: 13.4
Right Ascension(RA) 294.7119
Declination (DEC) 39.0738
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors "Timothy D. Morton, Stephen T. Bryson, Jeffrey L. Coughlin, Jason F. Rowe, Ganesh Ravichandran, Erik A. Petigura, Michael R. Haas, and Natalie M. Batalha"
Discovery Paper - Title FALSE POSITIVE PROBABILITIES FOR ALL KEPLER OBJECTS OF INTEREST: 1284 NEWLY VALIDATED PLANETS AND 499 LIKELY FALSE POSITIVES
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-577%20b/
Kepler-577 b
Kepler-577 b

  • Kepler-577 b is an exoplanet orbiting the star Kepler-577, located about 1709.5 light-years (524.1 pc) away from Solar System. Its discovery was publicly announced on 2016.
  • The host star Kepler-577 has apparent magnitude of 13.4, with absolute magnitude of 4.8.
  • It is 0.8 times more massive and 0.7 times bigger compared with our Sun. The surface temperature is 3789 with its spectral types of K2
  • In this planetary system, the extrasolar planet Kepler-577 b orbits around the star Kepler-577 every 25.7 days with its orbital distance of 0.16 AU ( 23467745.1 km)
  • (Projected orbit of Kepler-577 b around its host star Kepler-577)


  • The Star Kepler-577 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.233 AU ( 34802378.1 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.322 AU ( 48105981.5 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.490 AU ( 73302869.9 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.721 AU ( 107868384.3 km)
  • Radiation at Planetary Boundary of Kepler-577 b : 5746.65 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-577)



  • Kopparapu Recent Venus for Star Kepler-577 distance : 0.262 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-577 distance : 0.331 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-577 distance : 0.320 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-577 distance : 0.352 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-577 distance : 0.635 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-577 distance : 0.670 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-577)



  • Original Kopparapu Recent Venus for Star Kepler-577 distance : 0.259 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-577 distance : 0.343 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-577 distance : 0.343 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-577 distance : 0.645 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-577 distance : 0.671 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-577)



    (Position in Stellar Map of star Kepler-577 and its Exoplanet Kepler-577 b)



    (Zoomed position in Stellar Map of star Kepler-577 and its Exoplanet Kepler-577 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-577*)
    *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