Imaginary Picture of Kepler-474 b

Display orbital revolution of Kepler-474 b around the hoststar Kepler-474
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Exoplanet Name : Kepler-474 b
Alternate Name : "2MASS J19291716+4352522 b, K00155.01, KIC 8030148 b, KOI-155 b, KOI-155.01, WISE J192917.14+435252.1 b"
Status : Confirmed
Radius (Rjup / Re): 0.2730 (Rjup) 3.0601 (Rearth)
Mass (Mjup / Me): 0.0235 (Mjup) 7.4652 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.0620 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0155
Orbital Period(Observed/Estimated) 5.66 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 0.7972
Star Radiation at Atmospheric Boundary: 876593.7 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1365.7 (K)
Blackbody T 0.3(K) 1282.5 (K)
Blackbody T 0.7(K) 1037.7 (K)
Tidally Locked Blackbody T 0.1(K) 1624.1 (K)
Tidally Locked Blackbody T 0.3(K) 1525.2 (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-474
Alternate Name : "2MASS J19291716+4352522, KIC 8030148, KOI-155, WISE J192917.14+435252.1"
Star Distance(LY) : 2743.2
Stellar Radius(Rsun) : 1.6 (Rsun Measured)
Stellar Mass(Msun) : 1.0 (Msun Measured) 1.0 (Msun Estimated)
Star Age : 6.8 (GY)
Temperature : 5667 (K)
Spectral type : G2
UV portion[%]: 7.8
Visible portion[%]: 44.8
IR portion[%]: 47.4
Metalicity : -0.0
Absolute Magnitude: 2.7
Apparent Magnitude: 12.3
Right Ascension(RA) 292.3215
Declination (DEC) 43.8812
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 432 LIKELY FALSE POSITIVES
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-474%20b/
Kepler-474 b
Kepler-474 b

  • Kepler-474 b is an exoplanet orbiting the star Kepler-474, located about 2743.2 light-years (841.1 pc) away from Solar System. Its discovery was publicly announced on 2016.
  • The host star Kepler-474 has apparent magnitude of 12.3, with absolute magnitude of 2.7.
  • It is 1.0 times more massive and 1.6 times bigger compared with our Sun. The surface temperature is 5667 with its spectral types of G2
  • In this planetary system, the extrasolar planet Kepler-474 b orbits around the star Kepler-474 every 5.7 days with its orbital distance of 0.06 AU ( 9268064.3 km)
  • (Projected orbit of Kepler-474 b around its host star Kepler-474)


  • The Star Kepler-474 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.135 AU ( 169753406.7 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.568 AU ( 234643570.0 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.390 AU ( 357544874.1 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 3.517 AU ( 526142945.3 km)
  • Radiation at Planetary Boundary of Kepler-474 b : 876593.68 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-474)



  • Kopparapu Recent Venus for Star Kepler-474 distance : 1.184 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-474 distance : 1.499 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-474 distance : 1.448 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-474 distance : 1.588 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-474 distance : 2.656 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-474 distance : 2.801 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-474)



  • Original Kopparapu Recent Venus for Star Kepler-474 distance : 1.183 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-474 distance : 1.541 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-474 distance : 1.565 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-474 distance : 2.702 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-474 distance : 2.810 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-474)



    (Position in Stellar Map of star Kepler-474 and its Exoplanet Kepler-474 b)



    (Zoomed position in Stellar Map of star Kepler-474 and its Exoplanet Kepler-474 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-474*)
    *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