Imaginary Picture of HD 85628 A b
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Exoplanet Name : HD 85628 A b
Alternate Name : MASCARA-4 b/bRing-1 b
Radius (Rjup / Re): 1.5300 (Rjup) 17.1498 (Rearth)
Mass (Mjup / Me): 3.1000 (Mjup) 985.6078 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0470 (AU) 0.0470 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0077
Orbital Period(Observed/Estimated) 2.82 (Days Obs.) 2.81 (Days Est.)
Star Radiation at Atmospheric Boundary: 7575127.8 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 2341.5 (K)
Blackbody T 0.3(K) 2198.9 (K)
Blackbody T 0.7(K) 1779.1 (K)
Tidally Locked Blackbody T 0.1(K) 2784.5 (K)
Tidally Locked Blackbody T 0.3(K) 2614.9 (K)
Size Class: Super-Jupiter-size
Mass Class:
Detection Type : Primary Transit
Mass Detection :
Radius Detection : Primary Transit
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : HD 85628 A
Alternate Name :
Star Distance(LY) : 559.5
Stellar Radius(Rsun) : 1.9 (Rsun Measured)
Stellar Mass(Msun) : 1.8 (Msun Measured) 1.7 (Msun Estimated)
Star Age : 0.8 (GY)
Temperature : 7800 (K)
Spectral type : A3V
Metalicity : 0.0
Absolute Magnitude: 2.0
Apparent Magnitude: 8.2
Right Ascension(RA) 147.5801
Declination (DEC) -66.1139
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=HD+85628&submit=SIMBAD+search
Open Exoplanet Database Link
HD 85628 A b
HD 85628 A b

  • HD 85628 A b is an exoplanet orbiting the star HD 85628 A, located about 559.5 light-years (171.5 pc) away from Solar System. Its discovery was publicly announced on 2019.
  • The host star HD 85628 A has apparent magnitude of 8.2, with absolute magnitude of 2.0.
  • It is 1.8 times more massive and 1.9 times bigger compared with our Sun. The surface temperature is 7800 with its spectral types of A3V
  • In this planetary system, the extrasolar planet HD 85628 A b orbits around the star HD 85628 A every 2.8 days with its orbital distance of 0.05 AU ( 7031099.9 km)
  • (Projected orbit of HD 85628 A b around its host star HD 85628 A)


  • The Star HD 85628 A 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 2.531 AU ( 378572049.8 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 3.498 AU ( 523285505.5 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 5.330 AU ( 797371307.5 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 7.843 AU ( 1173366809.6 km)
  • Radiation at Planetary Boundary of HD 85628 A b : 7575127.78 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 85628 A)



  • Kopparapu Recent Venus for Star HD 85628 A distance : 2.384 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 85628 A distance : 3.020 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 85628 A distance : 2.916 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 85628 A distance : 3.192 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 85628 A distance : 5.205 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 85628 A distance : 5.489 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 85628 A)



  • Original Kopparapu Recent Venus for Star HD 85628 A distance : 2.477 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 85628 A distance : 3.084 AU
  • Original Kopparapu Moist Greenhouse for Star HD 85628 A distance : 3.278 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 85628 A distance : 5.299 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 85628 A distance : 5.510 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 85628 A)



    (Position in Stellar Map of star HD 85628 A and its Exoplanet HD 85628 A b)



    (Zoomed position in Stellar Map of star HD 85628 A and its Exoplanet HD 85628 A b (zoom level 3))