Imaginary Picture of Kepler-177 c

Display orbital revolution of Kepler-177 c around the hoststar Kepler-177
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Exoplanet Name : Kepler-177 c
Alternate Name : "2MASS J19041131+4503115 c, K00523.01, KIC 8806123 c, KOI-523 c, KOI-523.01, WISE J190411.31+450311.5 c"
Status : Confirmed
Radius (Rjup / Re): 0.7790 (Rjup) 8.7318 (Rearth)
Mass (Mjup / Me): 0.0462 (Mjup) 14.7046 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.2563 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.1353
Orbital Period(Observed/Estimated) 49.41 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 0.1929
Star Radiation at Atmospheric Boundary: 37770.6 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 622.2 (K)
Blackbody T 0.3(K) 584.3 (K)
Blackbody T 0.7(K) 472.8 (K)
Tidally Locked Blackbody T 0.1(K) 739.9 (K)
Tidally Locked Blackbody T 0.3(K) 694.9 (K)
Size Class: Jupiter-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-177
Alternate Name : "2MASS J19041131+4503115, KIC 8806123, KOI-523, WISE J190411.31+450311.5"
Star Distance(LY) : 4684.6
Stellar Radius(Rsun) : 1.4 (Rsun Measured)
Stellar Mass(Msun) : 0.9 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5732 (K)
Spectral type : G3
UV portion[%]: 7.7
Visible portion[%]: 44.6
IR portion[%]: 47.7
Metalicity : -0.1
Absolute Magnitude: 4.2
Apparent Magnitude: 15.0
Right Ascension(RA) 286.0471
Declination (DEC) 45.0532
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors 0
Discovery Paper - Title 0
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Kepler-177+&submit=SIMBAD+search
Open Exoplanet Database Link 0
Kepler-177 c
Kepler-177 c

  • Kepler-177 c is an exoplanet orbiting the star Kepler-177, located about 4684.6 light-years (1436.3 pc) away from Solar System. Its discovery was publicly announced on 2013.
  • The host star Kepler-177 has apparent magnitude of 15.0, with absolute magnitude of 4.2.
  • It is 0.9 times more massive and 1.4 times bigger compared with our Sun. The surface temperature is 5732 with its spectral types of G3
  • In this planetary system, the extrasolar planet Kepler-177 c orbits around the star Kepler-177 every 49.4 days with its orbital distance of 0.26 AU ( 38341294.4 km)
  • (Projected orbit of Kepler-177 c around its host star Kepler-177)


  • The Star Kepler-177 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.974 AU ( 145771936.8 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.347 AU ( 201494911.4 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.052 AU ( 307033654.3 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 3.020 AU ( 451813472.5 km)
  • Radiation at Planetary Boundary of Kepler-177 c : 37770.59 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-177)



  • Kopparapu Recent Venus for Star Kepler-177 distance : 1.013 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-177 distance : 1.282 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-177 distance : 1.239 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-177 distance : 1.358 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-177 distance : 2.267 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-177 distance : 2.392 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-177)



  • Original Kopparapu Recent Venus for Star Kepler-177 distance : 1.013 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-177 distance : 1.318 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-177 distance : 1.341 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-177 distance : 2.307 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-177 distance : 2.399 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-177)



    (Position in Stellar Map of star Kepler-177 and its Exoplanet Kepler-177 c)



    (Zoomed position in Stellar Map of star Kepler-177 and its Exoplanet Kepler-177 c (zoom level 3))

    (Synthetic Spectrum of star Kepler-177*)
    *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