Imaginary Picture of Kepler-977 b

Display orbital revolution of Kepler-977 b around the hoststar Kepler-977
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Exoplanet Name : Kepler-977 b
Alternate Name : "2MASS J19260389+4214535 b, K01847.01, KIC 6776401 b, KOI-1847 b, KOI-1847.01, WISE J192603.88+421453.2 b"
Status : Confirmed
Radius (Rjup / Re): 0.2340 (Rjup) 2.6229 (Rearth)
Mass (Mjup / Me): 0.0203 (Mjup) 6.4682 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.1675 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0735
Orbital Period(Observed/Estimated) 26.85 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 0.9402
Star Radiation at Atmospheric Boundary: 17794.9 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 515.5 (K)
Blackbody T 0.3(K) 484.1 (K)
Blackbody T 0.7(K) 391.7 (K)
Tidally Locked Blackbody T 0.1(K) 613.0 (K)
Tidally Locked Blackbody T 0.3(K) 575.7 (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-977
Alternate Name : "2MASS J19260389+4214535, KIC 6776401, KOI-1847, WISE J192603.88+421453.2"
Star Distance(LY) : 1854.3
Stellar Radius(Rsun) : 0.7 (Rsun Measured)
Stellar Mass(Msun) : 0.9 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 4.6 (GY)
Temperature : 5324 (K)
Spectral type : K0
UV portion[%]: 5.9
Visible portion[%]: 41.7
IR portion[%]: 52.4
Metalicity : -0.0
Absolute Magnitude: 4.7
Apparent Magnitude: 13.4
Right Ascension(RA) 291.5162
Declination (DEC) 42.2482
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 783 LIKELY FALSE POSITIVES
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Kepler-977&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-977%20b/
Kepler-977 b
Kepler-977 b

  • Kepler-977 b is an exoplanet orbiting the star Kepler-977, located about 1854.3 light-years (568.5 pc) away from Solar System. Its discovery was publicly announced on 2016.
  • The host star Kepler-977 has apparent magnitude of 13.4, with absolute magnitude of 4.7.
  • It is 0.9 times more massive and 0.7 times bigger compared with our Sun. The surface temperature is 5324 with its spectral types of K0
  • In this planetary system, the extrasolar planet Kepler-977 b orbits around the star Kepler-977 every 26.9 days with its orbital distance of 0.17 AU ( 25063205.1 km)
  • (Projected orbit of Kepler-977 b around its host star Kepler-977)


  • The Star Kepler-977 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.437 AU ( 65405489.4 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.604 AU ( 90407478.9 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.921 AU ( 137760990.7 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.355 AU ( 202721332.7 km)
  • Radiation at Planetary Boundary of Kepler-977 b : 17794.86 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-977)



  • Kopparapu Recent Venus for Star Kepler-977 distance : 0.465 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-977 distance : 0.589 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-977 distance : 0.569 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-977 distance : 0.624 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-977 distance : 1.055 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-977 distance : 1.112 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-977)



  • Original Kopparapu Recent Venus for Star Kepler-977 distance : 0.462 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-977 distance : 0.606 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-977 distance : 0.611 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-977 distance : 1.073 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-977 distance : 1.116 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-977)



    (Position in Stellar Map of star Kepler-977 and its Exoplanet Kepler-977 b)



    (Zoomed position in Stellar Map of star Kepler-977 and its Exoplanet Kepler-977 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-977*)
    *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