Imaginary Picture of Qatar-3 b

Display orbital revolution of Qatar-3 b around the hoststar Qatar-3
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Exoplanet Name : Qatar-3 b
Alternate Name :
Radius (Rjup / Re): 1.0960 (Rjup) 12.2851 (Rearth)
Mass (Mjup / Me): 4.3100 (Mjup) 1370.3128 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0378 (AU) 0.0378 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0069
Orbital Period(Observed/Estimated) 2.51 (Days Obs.) 2.51 (Days Est.)
Surface Gravity (G Earth) 9.0796
Star Radiation at Atmospheric Boundary: 1805248.0 (W/m2)
Measured Temperature (K) 84.0 (K)
Blackbody T 0.1(K) 1636.0 (K)
Blackbody T 0.3(K) 1536.4 (K)
Blackbody T 0.7(K) 1243.1 (K)
Tidally Locked Blackbody T 0.1(K) 1945.5 (K)
Tidally Locked Blackbody T 0.3(K) 1827.0 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Primary Transit
Mass Detection : Radial Velocity
Radius Detection : Primary Transit
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : Qatar-3
Alternate Name : UCAC3 253-304972
Star Distance(LY) : 0.0
Stellar Radius(Rsun) : 1.3 (Rsun Measured)
Stellar Mass(Msun) : 1.1 (Msun Measured) 1.1 (Msun Estimated)
Star Age : 0.3 (GY)
Temperature : 6007 (K)
Spectral type : G0V
UV portion[%]: 7.8
Visible portion[%]: 44.8
IR portion[%]: 47.4
Metalicity : -0.0
Absolute Magnitude: 25.0
Apparent Magnitude: 12.9
Right Ascension(RA) 359.1500
Declination (DEC) 36.2131
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
Qatar-3 b
Qatar-3 b

  • Qatar-3 b is an exoplanet orbiting the star Qatar-3. Its discovery was publicly announced on 2016.
  • The host star Qatar-3 has apparent magnitude of 12.9, with absolute magnitude of 25.0.
  • It is 1.1 times more massive and 1.3 times bigger compared with our Sun. The surface temperature is 6007 with its spectral types of G0V
  • In this planetary system, the extrasolar planet Qatar-3 b orbits around the star Qatar-3 every 2.5 days with its orbital distance of 0.04 AU ( 5659287.4 km)
  • (Projected orbit of Qatar-3 b around its host star Qatar-3)


  • The Star Qatar-3 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.994 AU ( 148751203.3 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.374 AU ( 205613036.3 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.094 AU ( 313308765.3 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 3.082 AU ( 461047573.3 km)
  • Radiation at Planetary Boundary of Qatar-3 b : 1805248.02 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Qatar-3)



  • Kopparapu Recent Venus for Star Qatar-3 distance : 1.016 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Qatar-3 distance : 1.287 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Qatar-3 distance : 1.243 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Qatar-3 distance : 1.363 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Qatar-3 distance : 2.260 AU
  • Kopparapu Outer Boundary for Early Mars for Star Qatar-3 distance : 2.384 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Qatar-3)



  • Original Kopparapu Recent Venus for Star Qatar-3 distance : 1.023 AU
  • Original Kopparapu Runaway Greenhouse for Star Qatar-3 distance : 1.322 AU
  • Original Kopparapu Moist Greenhouse for Star Qatar-3 distance : 1.353 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Qatar-3 distance : 2.300 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Qatar-3 distance : 2.392 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Qatar-3)



    (Position in Stellar Map of star Qatar-3 and its Exoplanet Qatar-3 b)



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

    (Synthetic Spectrum of star Qatar-3*)
    *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