Imaginary Picture of GPX-1 b

Display orbital revolution of GPX-1 b around the hoststar GPX-1
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Exoplanet Name : GPX-1 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 1.4700 (Rjup) 16.4772 (Rearth)
Mass (Mjup / Me): 19.7000 (Mjup) 6263.3786 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0338 (AU) 0.0338 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0048
Orbital Period(Observed/Estimated) 1.74 (Days Obs.) 1.75 (Days Est.)
Surface Gravity (G Earth) 23.0696
Star Radiation at Atmospheric Boundary: 6272097.0 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 2233.6 (K)
Blackbody T 0.3(K) 2097.5 (K)
Blackbody T 0.7(K) 1697.1 (K)
Tidally Locked Blackbody T 0.1(K) 2656.2 (K)
Tidally Locked Blackbody T 0.3(K) 2494.4 (K)
Size Class: Super-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 : GPX-1
Alternate Name :
Star Distance(LY) : 0.0
Stellar Radius(Rsun) : 1.6 (Rsun Measured)
Stellar Mass(Msun) : 1.7 (Msun Measured) 1.7 (Msun Estimated)
Star Age : 0.3 (GY)
Temperature : 7000 (K)
Spectral type : F2
UV portion[%]: 7.8
Visible portion[%]: 44.8
IR portion[%]: 47.4
Metalicity : 0.3
Absolute Magnitude: 25.0
Apparent Magnitude: 11.3
Right Ascension(RA) 38.3708
Declination (DEC) 56.0258
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
GPX-1 b
GPX-1 b

  • GPX-1 b is an exoplanet orbiting the star GPX-1. Its discovery was publicly announced on 2020.
  • The host star GPX-1 has apparent magnitude of 11.3, with absolute magnitude of 25.0.
  • It is 1.7 times more massive and 1.6 times bigger compared with our Sun. The surface temperature is 7000 with its spectral types of F2
  • In this planetary system, the extrasolar planet GPX-1 b orbits around the star GPX-1 every 1.7 days with its orbital distance of 0.03 AU ( 5056408.0 km)
  • (Projected orbit of GPX-1 b around its host star GPX-1)


  • The Star GPX-1 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.656 AU ( 247730107.4 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 2.289 AU ( 342427748.0 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 3.488 AU ( 521784108.8 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 5.133 AU ( 767828174.0 km)
  • Radiation at Planetary Boundary of GPX-1 b : 6272097.01 W/m2

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



  • Kopparapu Recent Venus for Star GPX-1 distance : 1.600 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star GPX-1 distance : 2.027 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star GPX-1 distance : 1.957 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star GPX-1 distance : 2.143 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star GPX-1 distance : 3.505 AU
  • Kopparapu Outer Boundary for Early Mars for Star GPX-1 distance : 3.696 AU

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



  • Original Kopparapu Recent Venus for Star GPX-1 distance : 1.645 AU
  • Original Kopparapu Runaway Greenhouse for Star GPX-1 distance : 2.074 AU
  • Original Kopparapu Moist Greenhouse for Star GPX-1 distance : 2.176 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star GPX-1 distance : 3.569 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star GPX-1 distance : 3.712 AU

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



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



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

    (Synthetic Spectrum of star GPX-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