Imaginary Picture of FL Lyr b

Display orbital revolution of FL Lyr b around the hoststar FL Lyr
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Exoplanet Name : FL Lyr b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 9.0000 (Mjup) 2861.4420 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 6.8346 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 12.0462
Orbital Period(Observed/Estimated) 4400.00 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 27.6339
Star Radiation at Atmospheric Boundary: 92.7 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 138.5 (K)
Blackbody T 0.3(K) 130.1 (K)
Blackbody T 0.7(K) 105.2 (K)
Tidally Locked Blackbody T 0.1(K) 164.7 (K)
Tidally Locked Blackbody T 0.3(K) 154.7 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Pulsar
Mass Detection : TTV
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : FL Lyr
Alternate Name :
Star Distance(LY) : 450.1
Stellar Radius(Rsun) : 1.6 (Rsun Estimated)
Stellar Mass(Msun) : 2.2 (Msun Measured) 2.2 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 6050 (K)
Spectral type : G0V
UV portion[%]: 7.8
Visible portion[%]: 44.8
IR portion[%]: 47.4
Metalicity : 0.0
Absolute Magnitude: 3.7
Apparent Magnitude: 9.4
Right Ascension(RA) 288.0203
Declination (DEC) 46.3242
Hubble Space Telescope Guide Star Catalog (GSC) ID 03542-01492
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=FL+Lyr+&submit=SIMBAD+search
Open Exoplanet Database Link
FL Lyr b
FL Lyr b

  • FL Lyr b is an exoplanet orbiting the star FL Lyr, located about 450.1 light-years (138.0 pc) away from Solar System. Its discovery was publicly announced on 2015.
  • The host star FL Lyr has apparent magnitude of 9.4, with absolute magnitude of 3.7.
  • It is 2.2 times more massive and 1.6 times bigger compared with our Sun. The surface temperature is 6050 with its spectral types of G0V
  • In this planetary system, the extrasolar planet FL Lyr b orbits around the star FL Lyr every 4400.0 days with its orbital distance of 6.83 AU ( 1022448103.2 km)
  • (Projected orbit of FL Lyr b around its host star FL Lyr)


  • The Star FL Lyr 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.288 AU ( 192608278.2 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.780 AU ( 266234975.0 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.712 AU ( 405683184.2 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 3.991 AU ( 596980577.5 km)
  • Radiation at Planetary Boundary of FL Lyr b : 92.73 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star FL Lyr)



  • Kopparapu Recent Venus for Star FL Lyr distance : 1.313 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star FL Lyr distance : 1.662 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star FL Lyr distance : 1.605 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star FL Lyr distance : 1.760 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star FL Lyr distance : 2.916 AU
  • Kopparapu Outer Boundary for Early Mars for Star FL Lyr distance : 3.075 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star FL Lyr)



  • Original Kopparapu Recent Venus for Star FL Lyr distance : 1.322 AU
  • Original Kopparapu Runaway Greenhouse for Star FL Lyr distance : 1.707 AU
  • Original Kopparapu Moist Greenhouse for Star FL Lyr distance : 1.749 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star FL Lyr distance : 2.968 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star FL Lyr distance : 3.086 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star FL Lyr)



    (Position in Stellar Map of star FL Lyr and its Exoplanet FL Lyr b)



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

    (Synthetic Spectrum of star FL Lyr*)
    *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