Imaginary Picture of HIP 54373 b

Display orbital revolution of HIP 54373 b around the hoststar HIP 54373
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Exoplanet Name : HIP 54373 b
Alternate Name :
Radius (Rjup / Re): 0.1565 (Rjup) 1.7543 (Rearth)
Mass (Mjup / Me): 0.0271 (Mjup) 8.6225 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0630 (AU) 0.0630 (AU Est.)
Eccentricity : 0.2000
Orbital Period(Yrs) 0.0212
Orbital Period(Observed/Estimated) 7.76 (Days Obs.) 7.65 (Days Est.)
Surface Gravity (G Earth) 2.8016
Star Radiation at Atmospheric Boundary: 21664.8 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 541.5 (K)
Blackbody T 0.3(K) 508.5 (K)
Blackbody T 0.7(K) 411.4 (K)
Tidally Locked Blackbody T 0.1(K) 643.9 (K)
Tidally Locked Blackbody T 0.3(K) 604.7 (K)
Size Class: super-Earth-size
Mass Class:
Detection Type : Radial Velocity
Mass Detection :
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : HIP 54373
Alternate Name :
Star Distance(LY) : 61.1
Stellar Radius(Rsun) : 0.5 (Rsun Estimated)
Stellar Mass(Msun) : 0.6 (Msun Measured) 0.6 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 4021 (K)
Spectral type : K5V
UV portion[%]: 0.7
Visible portion[%]: 24.1
IR portion[%]: 75.2
Metalicity : 0.0
Absolute Magnitude: 20.6
Apparent Magnitude: 22.0
Right Ascension(RA) 166.8654
Declination (DEC) -19.2900
Hubble Space Telescope Guide Star Catalog (GSC) ID
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=HIP+54373+&submit=SIMBAD+search
Open Exoplanet Database Link
HIP 54373 b
HIP 54373 b

  • HIP 54373 b is an exoplanet orbiting the star HIP 54373, located about 61.1 light-years (18.7 pc) away from Solar System. Its discovery was publicly announced on 2019.
  • The host star HIP 54373 has apparent magnitude of 22.0, with absolute magnitude of 20.6.
  • It is 0.6 times more massive and 0.5 times bigger compared with our Sun. The surface temperature is 4021 with its spectral types of K5V
  • In this planetary system, the extrasolar planet HIP 54373 b orbits around the star HIP 54373 every 7.8 days with its orbital distance of 0.06 AU ( 9424665.9 km)
  • (Projected orbit of HIP 54373 b around its host star HIP 54373)


  • The Star HIP 54373 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.181 AU ( 27137732.2 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.251 AU ( 37511437.8 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.382 AU ( 57159130.0 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.562 AU ( 84112163.7 km)
  • Radiation at Planetary Boundary of HIP 54373 b : 21664.80 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HIP 54373)



  • Kopparapu Recent Venus for Star HIP 54373 distance : 0.203 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HIP 54373 distance : 0.257 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HIP 54373 distance : 0.248 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HIP 54373 distance : 0.273 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HIP 54373 distance : 0.487 AU
  • Kopparapu Outer Boundary for Early Mars for Star HIP 54373 distance : 0.514 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HIP 54373)



  • Original Kopparapu Recent Venus for Star HIP 54373 distance : 0.201 AU
  • Original Kopparapu Runaway Greenhouse for Star HIP 54373 distance : 0.266 AU
  • Original Kopparapu Moist Greenhouse for Star HIP 54373 distance : 0.265 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HIP 54373 distance : 0.495 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HIP 54373 distance : 0.515 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HIP 54373)



    (Position in Stellar Map of star HIP 54373 and its Exoplanet HIP 54373 b)



    (Zoomed position in Stellar Map of star HIP 54373 and its Exoplanet HIP 54373 b (zoom level 3))

    (Synthetic Spectrum of star HIP 54373*)
    *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