Imaginary Picture of KOI-4878 b

Display orbital revolution of KOI-4878 b around the hoststar KOI-4878
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Exoplanet Name : KOI-4878 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.0928 (Rjup) 1.0402 (Rearth)
Mass (Mjup / Me): 0.0035 (Mjup) 1.1270 (Mearth)
Semi Major Axis / Orbital Distance Calculated 1.1370 (AU) 1.1370 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 1.2293
Orbital Period(Observed/Estimated) 449.01 (Days Obs.) 449.16 (Days Est.)
Surface Gravity (G Earth) 1.0415
Star Radiation at Atmospheric Boundary: 1431.5 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 274.5 (K)
Blackbody T 0.3(K) 257.8 (K)
Blackbody T 0.7(K) 208.6 (K)
Tidally Locked Blackbody T 0.1(K) 326.5 (K)
Tidally Locked Blackbody T 0.3(K) 306.6 (K)
Size Class: Earth-size
Mass Class:
Detection Type : Primary Transit
Mass Detection :
Radius Detection : Primary Transit
Habitability by Solar Eq. Astronomical Unit: Habitable
Habitability by Kopparapu: Habitable
Star Name : KOI-4878
Alternate Name : 2MASS J19045474+5000488
Star Distance(LY) : 0.0
Stellar Radius(Rsun) : 1.1 (Rsun Measured)
Stellar Mass(Msun) : 1.0 (Msun Measured) 1.0 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 6031 (K)
Spectral type : G0
UV portion[%]: 7.8
Visible portion[%]: 44.8
IR portion[%]: 47.4
Metalicity : -0.2
Absolute Magnitude: 25.0
Apparent Magnitude: 12.1
Right Ascension(RA) 286.2281
Declination (DEC) 50.0136
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal
Discovery Paper - URL
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=KOI-4878&submit=SIMBAD+search
Open Exoplanet Database Link
KOI-4878 b
KOI-4878 b

  • KOI-4878 b is an exoplanet orbiting the star KOI-4878. Its discovery was publicly announced on 2017.
  • The host star KOI-4878 has apparent magnitude of 12.1, with absolute magnitude of 25.0.
  • It is 1.0 times more massive and 1.1 times bigger compared with our Sun. The surface temperature is 6031 with its spectral types of G0
  • In this planetary system, the extrasolar planet KOI-4878 b orbits around the star KOI-4878 every 449.0 days with its orbital distance of 1.14 AU ( 170092779.0 km)
  • (Projected orbit of KOI-4878 b around its host star KOI-4878)


  • The Star KOI-4878 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.842 AU ( 125894866.6 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.163 AU ( 174019605.9 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.773 AU ( 265167369.0 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.608 AU ( 390205399.7 km)
  • Radiation at Planetary Boundary of KOI-4878 b : 1431.47 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star KOI-4878)



  • Kopparapu Recent Venus for Star KOI-4878 distance : 0.859 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star KOI-4878 distance : 1.088 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star KOI-4878 distance : 1.051 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star KOI-4878 distance : 1.151 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star KOI-4878 distance : 1.909 AU
  • Kopparapu Outer Boundary for Early Mars for Star KOI-4878 distance : 2.013 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star KOI-4878)



  • Original Kopparapu Recent Venus for Star KOI-4878 distance : 0.865 AU
  • Original Kopparapu Runaway Greenhouse for Star KOI-4878 distance : 1.117 AU
  • Original Kopparapu Moist Greenhouse for Star KOI-4878 distance : 1.144 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star KOI-4878 distance : 1.943 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star KOI-4878 distance : 2.021 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star KOI-4878)



    (Position in Stellar Map of star KOI-4878 and its Exoplanet KOI-4878 b)



    (Zoomed position in Stellar Map of star KOI-4878 and its Exoplanet KOI-4878 b (zoom level 3))

    (Synthetic Spectrum of star KOI-4878*)
    *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