Imaginary Picture of KOI-984 b

Display orbital revolution of KOI-984 b around the hoststar KOI-984
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Exoplanet Name : KOI-984 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.3840 (Rjup) 4.3043 (Rearth)
Mass (Mjup / Me): 0.0544 (Mjup) 17.2958 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0504 (AU) 0.0504 (AU Est.)
Eccentricity : 0.1200
Orbital Period(Yrs) 0.0117
Orbital Period(Observed/Estimated) 4.29 (Days Obs.) 4.29 (Days Est.)
Surface Gravity (G Earth) 0.9336
Star Radiation at Atmospheric Boundary: 253930.1 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1001.9 (K)
Blackbody T 0.3(K) 940.9 (K)
Blackbody T 0.7(K) 761.3 (K)
Tidally Locked Blackbody T 0.1(K) 1191.5 (K)
Tidally Locked Blackbody T 0.3(K) 1118.9 (K)
Size Class: Neptune-size
Mass Class:
Detection Type : Primary Transit
Mass Detection : Theoretical
Radius Detection : Primary Transit
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : KOI-984
Alternate Name :
Star Distance(LY) : 749.0
Stellar Radius(Rsun) : 0.8 (Rsun Measured)
Stellar Mass(Msun) : 0.9 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5295 (K)
Spectral type : K0
UV portion[%]: 5.7
Visible portion[%]: 41.4
IR portion[%]: 52.9
Metalicity : 0.1
Absolute Magnitude: 5.2
Apparent Magnitude: 12.0
Right Ascension(RA) 291.0500
Declination (DEC) 36.8400
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal
Discovery Paper - URL
SIMBAD LINK https://simbad.u-strasbg.fr/simbad/sim-basic?Ident=KOI-984&submit=SIMBAD+search
Open Exoplanet Database Link
KOI-984 b
KOI-984 b

  • KOI-984 b is an exoplanet orbiting the star KOI-984, located about 749.0 light-years (229.6 pc) away from Solar System. Its discovery was publicly announced on 2017.
  • The host star KOI-984 has apparent magnitude of 12.0, with absolute magnitude of 5.2.
  • It is 0.9 times more massive and 0.8 times bigger compared with our Sun. The surface temperature is 5295 with its spectral types of K0
  • In this planetary system, the extrasolar planet KOI-984 b orbits around the star KOI-984 every 4.3 days with its orbital distance of 0.05 AU ( 7539732.7 km)
  • (Projected orbit of KOI-984 b around its host star KOI-984)


  • The Star KOI-984 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.497 AU ( 74326442.2 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.687 AU ( 102738567.0 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.046 AU ( 156550840.1 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.540 AU ( 230371419.2 km)
  • Radiation at Planetary Boundary of KOI-984 b : 253930.11 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star KOI-984)



  • Kopparapu Recent Venus for Star KOI-984 distance : 0.529 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star KOI-984 distance : 0.670 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star KOI-984 distance : 0.648 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star KOI-984 distance : 0.710 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star KOI-984 distance : 1.202 AU
  • Kopparapu Outer Boundary for Early Mars for Star KOI-984 distance : 1.267 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star KOI-984)



  • Original Kopparapu Recent Venus for Star KOI-984 distance : 0.526 AU
  • Original Kopparapu Runaway Greenhouse for Star KOI-984 distance : 0.690 AU
  • Original Kopparapu Moist Greenhouse for Star KOI-984 distance : 0.696 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star KOI-984 distance : 1.222 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star KOI-984 distance : 1.271 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star KOI-984)



    (Position in Stellar Map of star KOI-984 and its Exoplanet KOI-984 b)



    (Zoomed position in Stellar Map of star KOI-984 and its Exoplanet KOI-984 b (zoom level 3))

    (Synthetic Spectrum of star KOI-984*)
    *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