Imaginary Picture of HD 210277 b
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Exoplanet Name : HD 210277 b
Alternate Name :
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 1.2300 (Mjup) 391.0637 (Mearth)
Semi Major Axis / Orbital Distance Calculated 1.1000 (AU) 1.1000 (AU Est.)
Eccentricity : 0.4720
Orbital Period(Yrs) 1.2104
Orbital Period(Observed/Estimated) 442.10 (Days Obs.) 403.61 (Days Est.)
Star Radiation at Atmospheric Boundary: 1148.5 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 259.8 (K)
Blackbody T 0.3(K) 244.0 (K)
Blackbody T 0.7(K) 197.4 (K)
Tidally Locked Blackbody T 0.1(K) 309.0 (K)
Tidally Locked Blackbody T 0.3(K) 290.2 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Radial Velocity
Mass Detection :
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Habitable
Habitability by Kopparapu: Not habitable
Star Name : HD 210277
Alternate Name :
Star Distance(LY) : 69.4
Stellar Radius(Rsun) : 1.1 (Rsun Measured)
Stellar Mass(Msun) : 1.1 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 6.9 (GY)
Temperature : 5532 (K)
Spectral type : G0
Metalicity : 0.2
Absolute Magnitude: 5.0
Apparent Magnitude: 6.6
Right Ascension(RA) 332.3744
Declination (DEC) -7.5422
Hubble Space Telescope Guide Star Catalog (GSC) ID 0
Discovered by
Discovery Paper - Authors 0
Discovery Paper - Title
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.harvard.edu/simbad/sim-basic?Ident=HD+210277+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/HD%20210277%20b/
HD 210277 b
HD 210277 b

  • HD 210277 b is an exoplanet orbiting the star HD 210277, located about 69.4 light-years (21.3 pc) away from Solar System. Its discovery was publicly announced on 1998.
  • The host star HD 210277 has apparent magnitude of 6.6, with absolute magnitude of 5.0.
  • It is 1.1 times more massive and 1.1 times bigger compared with our Sun. The surface temperature is 5532 with its spectral types of G0
  • In this planetary system, the extrasolar planet HD 210277 b orbits around the star HD 210277 every 442.1 days with its orbital distance of 1.10 AU ( 164557657.8 km)
  • (Projected orbit of HD 210277 b around its host star HD 210277)


  • The Star HD 210277 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.729 AU ( 109097585.9 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.008 AU ( 150801374.3 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.536 AU ( 229787922.1 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.260 AU ( 338142993.7 km)
  • Radiation at Planetary Boundary of HD 210277 b : 1148.51 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 210277)



  • Kopparapu Recent Venus for Star HD 210277 distance : 0.767 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 210277 distance : 0.971 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 210277 distance : 0.938 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 210277 distance : 1.029 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 210277 distance : 1.727 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 210277 distance : 1.822 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 210277)



  • Original Kopparapu Recent Venus for Star HD 210277 distance : 0.764 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 210277 distance : 0.999 AU
  • Original Kopparapu Moist Greenhouse for Star HD 210277 distance : 1.011 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 210277 distance : 1.757 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 210277 distance : 1.827 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 210277)



    (Position in Stellar Map of star HD 210277 and its Exoplanet HD 210277 b)



    (Zoomed position in Stellar Map of star HD 210277 and its Exoplanet HD 210277 b (zoom level 3))