Imaginary Picture of HATS-44 b

Display orbital revolution of HATS-44 b around the hoststar HATS-44
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Exoplanet Name : HATS-44 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 1.0670 (Rjup) 11.9600 (Rearth)
Mass (Mjup / Me): 0.5600 (Mjup) 178.0453 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0365 (AU) 0.0365 (AU Est.)
Eccentricity : 0.2790
Orbital Period(Yrs) 0.0075
Orbital Period(Observed/Estimated) 2.74 (Days Obs.) 2.75 (Days Est.)
Surface Gravity (G Earth) 1.2447
Star Radiation at Atmospheric Boundary: 440026.4 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1149.5 (K)
Blackbody T 0.3(K) 1079.5 (K)
Blackbody T 0.7(K) 873.4 (K)
Tidally Locked Blackbody T 0.1(K) 1367.0 (K)
Tidally Locked Blackbody T 0.3(K) 1283.8 (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 : HATS-44
Alternate Name : 2MASS-05371842-2758214
Star Distance(LY) : 1510.1
Stellar Radius(Rsun) : 0.8 (Rsun Measured)
Stellar Mass(Msun) : 0.9 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 9.7 (GY)
Temperature : 5080 (K)
Spectral type : K
UV portion[%]: 3.8
Visible portion[%]: 38.1
IR portion[%]: 58.1
Metalicity : 0.3
Absolute Magnitude: 6.1
Apparent Magnitude: 14.4
Right Ascension(RA) 84.3267
Declination (DEC) -27.9726
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 http://www.openexoplanetcatalogue.com/planet/HATS-44%20b/
HATS-44 b
HATS-44 b

  • HATS-44 b is an exoplanet orbiting the star HATS-44, located about 1510.1 light-years (463.0 pc) away from Solar System. Its discovery was publicly announced on 2017.
  • The host star HATS-44 has apparent magnitude of 14.4, with absolute magnitude of 6.1.
  • It is 0.9 times more massive and 0.8 times bigger compared with our Sun. The surface temperature is 5080 with its spectral types of K
  • In this planetary system, the extrasolar planet HATS-44 b orbits around the star HATS-44 every 2.7 days with its orbital distance of 0.04 AU ( 5458826.3 km)
  • (Projected orbit of HATS-44 b around its host star HATS-44)


  • The Star HATS-44 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.474 AU ( 70838433.3 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.655 AU ( 97917227.1 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.997 AU ( 149204185.0 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.468 AU ( 219560494.5 km)
  • Radiation at Planetary Boundary of HATS-44 b : 440026.42 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HATS-44)



  • Kopparapu Recent Venus for Star HATS-44 distance : 0.510 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HATS-44 distance : 0.646 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HATS-44 distance : 0.624 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HATS-44 distance : 0.685 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HATS-44 distance : 1.167 AU
  • Kopparapu Outer Boundary for Early Mars for Star HATS-44 distance : 1.231 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HATS-44)



  • Original Kopparapu Recent Venus for Star HATS-44 distance : 0.505 AU
  • Original Kopparapu Runaway Greenhouse for Star HATS-44 distance : 0.666 AU
  • Original Kopparapu Moist Greenhouse for Star HATS-44 distance : 0.669 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HATS-44 distance : 1.187 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HATS-44 distance : 1.234 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HATS-44)



    (Position in Stellar Map of star HATS-44 and its Exoplanet HATS-44 b)



    (Zoomed position in Stellar Map of star HATS-44 and its Exoplanet HATS-44 b (zoom level 3))

    (Synthetic Spectrum of star HATS-44*)
    *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