Imaginary Picture of Qatar-1 b

Display orbital revolution of Qatar-1 b around the hoststar Qatar-1
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Exoplanet Name : Qatar-1 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 1.1430 (Rjup) 12.8119 (Rearth)
Mass (Mjup / Me): 1.2940 (Mjup) 411.4118 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0233 (AU) 0.0233 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0039
Orbital Period(Observed/Estimated) 1.42 (Days Obs.) 1.42 (Days Est.)
Surface Gravity (G Earth) 2.5064
Star Radiation at Atmospheric Boundary: 918268.4 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1381.6 (K)
Blackbody T 0.3(K) 1297.5 (K)
Blackbody T 0.7(K) 1049.8 (K)
Tidally Locked Blackbody T 0.1(K) 1643.0 (K)
Tidally Locked Blackbody T 0.3(K) 1543.0 (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-1
Alternate Name :
Star Distance(LY) : 609.9
Stellar Radius(Rsun) : 0.8 (Rsun Measured)
Stellar Mass(Msun) : 0.8 (Msun Measured) 0.8 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5013 (K)
Spectral type : K
UV portion[%]: 3.3
Visible portion[%]: 37.2
IR portion[%]: 59.4
Metalicity : 0.2
Absolute Magnitude: 6.5
Apparent Magnitude: 12.8
Right Ascension(RA) 303.3833
Declination (DEC) 65.1619
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors CUTRI R.M.; SKRUTSKIE M.F.; VAN DYK S.; BEICHMAN C.A.; CARPENTER J.M.; CHESTER T.; CAMBRESY L.; EVANS T.; FOWLER J.; GIZIS J.; HOWARD E.; HUCHRA J.; JARRETT T.; KOPAN E.L.; KIRKPATRICK J.D.; LIGHT R.M.; MARSH K.A.; McCALLON H.; SCHNEIDER S.; STIENING R.; SYKES M.; WEINBERG M.; WHEATON W.A.; WHEELOCK S.; ZACARIAS N.
Discovery Paper - Title 2MASS All Sky Catalog of point sources.
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Qatar-1%20b/
Qatar-1 b
Qatar-1 b

  • Qatar-1 b is an exoplanet orbiting the star Qatar-1, located about 609.9 light-years (187.0 pc) away from Solar System. Its discovery was publicly announced on 2010.
  • The host star Qatar-1 has apparent magnitude of 12.8, with absolute magnitude of 6.5.
  • It is 0.8 times more massive and 0.8 times bigger compared with our Sun. The surface temperature is 5013 with its spectral types of K
  • In this planetary system, the extrasolar planet Qatar-1 b orbits around the star Qatar-1 every 1.4 days with its orbital distance of 0.02 AU ( 3488622.3 km)
  • (Projected orbit of Qatar-1 b around its host star Qatar-1)


  • The Star Qatar-1 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.437 AU ( 65398692.7 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.604 AU ( 90398084.0 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.921 AU ( 137746675.0 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.355 AU ( 202700266.6 km)
  • Radiation at Planetary Boundary of Qatar-1 b : 918268.37 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Qatar-1)



  • Kopparapu Recent Venus for Star Qatar-1 distance : 0.473 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Qatar-1 distance : 0.598 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Qatar-1 distance : 0.578 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Qatar-1 distance : 0.634 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Qatar-1 distance : 1.084 AU
  • Kopparapu Outer Boundary for Early Mars for Star Qatar-1 distance : 1.143 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Qatar-1)



  • Original Kopparapu Recent Venus for Star Qatar-1 distance : 0.468 AU
  • Original Kopparapu Runaway Greenhouse for Star Qatar-1 distance : 0.617 AU
  • Original Kopparapu Moist Greenhouse for Star Qatar-1 distance : 0.619 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Qatar-1 distance : 1.102 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Qatar-1 distance : 1.146 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Qatar-1)



    (Position in Stellar Map of star Qatar-1 and its Exoplanet Qatar-1 b)



    (Zoomed position in Stellar Map of star Qatar-1 and its Exoplanet Qatar-1 b (zoom level 3))

    (Synthetic Spectrum of star Qatar-1*)
    *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