Imaginary Picture of HD 6434 b

Display orbital revolution of HD 6434 b around the hoststar HD 6434
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Exoplanet Name : HD 6434 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 0.3900 (Mjup) 123.9958 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.1400 (AU) 0.1400 (AU Est.)
Eccentricity : 0.1700
Orbital Period(Yrs) 0.0602
Orbital Period(Observed/Estimated) 22.00 (Days Obs.) 21.53 (Days Est.)
Surface Gravity (G Earth) 1.1975
Star Radiation at Atmospheric Boundary: 23564.7 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 553.0 (K)
Blackbody T 0.3(K) 519.3 (K)
Blackbody T 0.7(K) 420.2 (K)
Tidally Locked Blackbody T 0.1(K) 657.6 (K)
Tidally Locked Blackbody T 0.3(K) 617.6 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Radial Velocity
Mass Detection :
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : HD 6434
Alternate Name :
Star Distance(LY) : 138.3
Stellar Radius(Rsun) : 0.6 (Rsun Measured)
Stellar Mass(Msun) : 0.8 (Msun Measured) 0.8 (Msun Estimated)
Star Age : 3.8 (GY)
Temperature : 5835 (K)
Spectral type : G3 IV
UV portion[%]: 7.8
Visible portion[%]: 44.8
IR portion[%]: 47.4
Metalicity : -0.5
Absolute Magnitude: 4.6
Apparent Magnitude: 7.7
Right Ascension(RA) 16.1673
Declination (DEC) -39.4881
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors "Natalie R. Hinkel, Stephen R. Kane, Genady Pilyavsky, Tabetha S. Boyajian, David J. James, Dominique Naef, Debra A. Fischer, Stephane Udry"
Discovery Paper - Title A New Analysis of the Exoplanet Hosting System HD 6434
Discovery Paper - Journal "The Astronomical Journal,olume 150,umber 6"
Discovery Paper - URL http://iopscience.iop.org/article/10.1088/0004-6256/150/6/169/meta
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+6434+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/HD%206434%20b/
HD 6434 b
HD 6434 b

  • HD 6434 b is an exoplanet orbiting the star HD 6434, located about 138.3 light-years (42.4 pc) away from Solar System. Its discovery was publicly announced on 2000.
  • The host star HD 6434 has apparent magnitude of 7.7, with absolute magnitude of 4.6.
  • It is 0.8 times more massive and 0.6 times bigger compared with our Sun. The surface temperature is 5835 with its spectral types of G3 IV
  • In this planetary system, the extrasolar planet HD 6434 b orbits around the star HD 6434 every 22.0 days with its orbital distance of 0.14 AU ( 20943701.9 km)
  • (Projected orbit of HD 6434 b around its host star HD 6434)


  • The Star HD 6434 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.420 AU ( 62894792.5 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.581 AU ( 86937039.7 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.886 AU ( 132472809.3 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.303 AU ( 194939542.2 km)
  • Radiation at Planetary Boundary of HD 6434 b : 23564.70 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 6434)



  • Kopparapu Recent Venus for Star HD 6434 distance : 0.434 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 6434 distance : 0.550 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 6434 distance : 0.531 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 6434 distance : 0.582 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 6434 distance : 0.970 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 6434 distance : 1.023 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 6434)



  • Original Kopparapu Recent Venus for Star HD 6434 distance : 0.435 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 6434 distance : 0.565 AU
  • Original Kopparapu Moist Greenhouse for Star HD 6434 distance : 0.576 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 6434 distance : 0.987 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 6434 distance : 1.026 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 6434)



    (Position in Stellar Map of star HD 6434 and its Exoplanet HD 6434 b)



    (Zoomed position in Stellar Map of star HD 6434 and its Exoplanet HD 6434 b (zoom level 3))

    (Synthetic Spectrum of star HD 6434*)
    *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