Imaginary Picture of KOI-984 c

Display orbital revolution of KOI-984 c around the hoststar KOI-984
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Exoplanet Name : KOI-984 c
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 0.6601 (Mjup) 209.8709 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.1467 (AU) 0.1467 (AU Est.)
Eccentricity : 0.3800
Orbital Period(Yrs) 0.0589
Orbital Period(Observed/Estimated) 21.51 (Days Obs.) 21.30 (Days Est.)
Surface Gravity (G Earth) 2.0268
Star Radiation at Atmospheric Boundary: 29972.0 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 587.2 (K)
Blackbody T 0.3(K) 551.5 (K)
Blackbody T 0.7(K) 446.2 (K)
Tidally Locked Blackbody T 0.1(K) 698.4 (K)
Tidally Locked Blackbody T 0.3(K) 655.8 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : TTV
Mass Detection : TTV
Radius Detection :
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
Open Exoplanet Database Link
KOI-984 c
KOI-984 c

  • KOI-984 c 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 2021.
  • 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 c orbits around the star KOI-984 every 21.5 days with its orbital distance of 0.15 AU ( 21946007.6 km)
  • (Projected orbit of KOI-984 c 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 c : 29971.95 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 c)



    (Zoomed position in Stellar Map of star KOI-984 and its Exoplanet KOI-984 c (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