Imaginary Picture of HATS-55 b

Display orbital revolution of HATS-55 b around the hoststar HATS-55
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Exoplanet Name : HATS-55 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 1.2510 (Rjup) 14.0225 (Rearth)
Mass (Mjup / Me): 0.9210 (Mjup) 292.8209 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0541 (AU) 0.0541 (AU Est.)
Eccentricity : 0.0920
Orbital Period(Yrs) 0.0000
Orbital Period(Observed/Estimated) 0.00 (Days Obs.) 4.21 (Days Est.)
Surface Gravity (G Earth) 1.4892
Star Radiation at Atmospheric Boundary: 791500.2 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1331.2 (K)
Blackbody T 0.3(K) 1250.2 (K)
Blackbody T 0.7(K) 1011.5 (K)
Tidally Locked Blackbody T 0.1(K) 1583.1 (K)
Tidally Locked Blackbody T 0.3(K) 1486.7 (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 : HATS-55
Alternate Name :
Star Distance(LY) : 2033.9
Stellar Radius(Rsun) : 1.1 (Rsun Measured)
Stellar Mass(Msun) : 1.2 (Msun Measured) 0.0 (Msun Estimated)
Star Age : 0.4 (GY)
Temperature : 6214 (K)
Spectral type : F8
UV portion[%]: 7.8
Visible portion[%]: 44.8
IR portion[%]: 47.4
Metalicity : 0.1
Absolute Magnitude: 13.0
Apparent Magnitude: 22.0
Right Ascension(RA) 114.2833
Declination (DEC) -32.7556
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
HATS-55 b
HATS-55 b

  • HATS-55 b is an exoplanet orbiting the star HATS-55, located about 2033.9 light-years (623.6 pc) away from Solar System. Its discovery was publicly announced on 2018.
  • The host star HATS-55 has apparent magnitude of 22.0, with absolute magnitude of 13.0.
  • It is 1.2 times more massive and 1.1 times bigger compared with our Sun. The surface temperature is 6214 with its spectral types of F8
  • (Projected orbit of HATS-55 b around its host star HATS-55)


  • The Star HATS-55 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.942 AU ( 140909087.0 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.302 AU ( 194773182.1 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.984 AU ( 296791226.3 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.919 AU ( 436741291.1 km)
  • Radiation at Planetary Boundary of HATS-55 b : 791500.17 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HATS-55)



  • Kopparapu Recent Venus for Star HATS-55 distance : 0.951 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HATS-55 distance : 1.204 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HATS-55 distance : 1.163 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HATS-55 distance : 1.274 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HATS-55 distance : 2.105 AU
  • Kopparapu Outer Boundary for Early Mars for Star HATS-55 distance : 2.220 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HATS-55)



  • Original Kopparapu Recent Venus for Star HATS-55 distance : 0.961 AU
  • Original Kopparapu Runaway Greenhouse for Star HATS-55 distance : 1.235 AU
  • Original Kopparapu Moist Greenhouse for Star HATS-55 distance : 1.271 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HATS-55 distance : 2.143 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HATS-55 distance : 2.228 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HATS-55)



    (Position in Stellar Map of star HATS-55 and its Exoplanet HATS-55 b)



    (Zoomed position in Stellar Map of star HATS-55 and its Exoplanet HATS-55 b (zoom level 3))

    (Synthetic Spectrum of star HATS-55*)
    *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