Imaginary Picture of HATS-2 b
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Exoplanet Name : HATS-2 b
Alternate Name :
Radius (Rjup / Re): 1.1680 (Rjup) 13.0921 (Rearth)
Mass (Mjup / Me): 1.3450 (Mjup) 427.6266 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0230 (AU) 0.0230 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0037
Orbital Period(Observed/Estimated) 1.35 (Days Obs.) 1.36 (Days Est.)
Star Radiation at Atmospheric Boundary: 1395442.1 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1534.0 (K)
Blackbody T 0.3(K) 1440.6 (K)
Blackbody T 0.7(K) 1165.6 (K)
Tidally Locked Blackbody T 0.1(K) 1824.2 (K)
Tidally Locked Blackbody T 0.3(K) 1713.1 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Primary Transit
Mass Detection :
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : HATS-2
Alternate Name :
Star Distance(LY) : 1174.2
Stellar Radius(Rsun) : 0.9 (Rsun Measured)
Stellar Mass(Msun) : 0.9 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 9.7 (GY)
Temperature : 5227 (K)
Spectral type : K
Metalicity : 0.1
Absolute Magnitude: 5.8
Apparent Magnitude: 13.6
Right Ascension(RA) 176.7390
Declination (DEC) -22.5630
Hubble Space Telescope Guide Star Catalog (GSC) ID 06665-00236
Discovered by
Discovery Paper - Authors "M. Mohler-Fischer,. Mancini,. D. Hartman,. B. Bakos,. Penev,. Bayliss,. Jordan,. Csubry,. Zhou,. Rabus,. Nikolov,. Brahm,. Espinoza,. A. Buchhave,. Beky,. Suc,. Csak,. Henning,. J. Wright,. G. Tinney,. C. Addison,. Schmidt,. W. Noyes,I. Papp,. Lazar,. Sari,. Conroy"
Discovery Paper - Title HATS-2b: A transiting extrasolar planet orbiting a K-type star showing starspot activity
Discovery Paper - Journal "A&A 558, A55 (2013)DOI https://doi.org/10.1051/0004-6361/201321663"
Discovery Paper - URL http://www.aanda.org/articles/aa/abs/2013/10/aa21663-13/aa21663-13.html
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HATS-2+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/HATS-2%20b/
HATS-2 b
HATS-2 b

  • HATS-2 b is an exoplanet orbiting the star HATS-2, located about 1174.2 light-years (360.0 pc) away from Solar System. Its discovery was publicly announced on 2013.
  • The host star HATS-2 has apparent magnitude of 13.6, with absolute magnitude of 5.8.
  • It is 0.9 times more massive and 0.9 times bigger compared with our Sun. The surface temperature is 5227 with its spectral types of K
  • In this planetary system, the extrasolar planet HATS-2 b orbits around the star HATS-2 every 1.4 days with its orbital distance of 0.02 AU ( 3440751.0 km)
  • (Projected orbit of HATS-2 b around its host star HATS-2)


  • The Star HATS-2 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.532 AU ( 79513239.8 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.735 AU ( 109908076.7 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.120 AU ( 167475586.3 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.647 AU ( 246447661.8 km)
  • Radiation at Planetary Boundary of HATS-2 b : 1395442.07 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HATS-2)



  • Kopparapu Recent Venus for Star HATS-2 distance : 0.568 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HATS-2 distance : 0.720 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HATS-2 distance : 0.695 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HATS-2 distance : 0.763 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HATS-2 distance : 1.293 AU
  • Kopparapu Outer Boundary for Early Mars for Star HATS-2 distance : 1.364 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HATS-2)



  • Original Kopparapu Recent Venus for Star HATS-2 distance : 0.564 AU
  • Original Kopparapu Runaway Greenhouse for Star HATS-2 distance : 0.741 AU
  • Original Kopparapu Moist Greenhouse for Star HATS-2 distance : 0.746 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HATS-2 distance : 1.315 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HATS-2 distance : 1.368 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HATS-2)



    (Position in Stellar Map of star HATS-2 and its Exoplanet HATS-2 b)



    (Zoomed position in Stellar Map of star HATS-2 and its Exoplanet HATS-2 b (zoom level 3))