Imaginary Picture of HD 73344 b

Display orbital revolution of HD 73344 b around the hoststar HD 73344
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Exoplanet Name : HD 73344 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.2560 (Rjup) 2.8695 (Rearth)
Mass (Mjup / Me): 0.0221 (Mjup) 7.0319 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.1331 (AU) 0.1331 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0427
Orbital Period(Observed/Estimated) 15.61 (Days Obs.) 15.11 (Days Est.)
Surface Gravity (G Earth) 0.8540
Star Radiation at Atmospheric Boundary: 246519.3 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 994.5 (K)
Blackbody T 0.3(K) 933.9 (K)
Blackbody T 0.7(K) 755.7 (K)
Tidally Locked Blackbody T 0.1(K) 1182.7 (K)
Tidally Locked Blackbody T 0.3(K) 1110.6 (K)
Size Class: sub-Neptune-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 73344
Alternate Name :
Star Distance(LY) : 114.9
Stellar Radius(Rsun) : 1.4 (Rsun Measured)
Stellar Mass(Msun) : 1.4 (Msun Measured) 1.3 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 6460 (K)
Spectral type : F6V
UV portion[%]: 7.8
Visible portion[%]: 44.8
IR portion[%]: 47.4
Metalicity : 0.0
Absolute Magnitude: 3.8
Apparent Magnitude: 6.5
Right Ascension(RA) 129.6917
Declination (DEC) 23.6461
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
HD 73344 b
HD 73344 b

  • HD 73344 b is an exoplanet orbiting the star HD 73344, located about 114.9 light-years (35.2 pc) away from Solar System. Its discovery was publicly announced on 2018.
  • The host star HD 73344 has apparent magnitude of 6.5, with absolute magnitude of 3.8.
  • It is 1.4 times more massive and 1.4 times bigger compared with our Sun. The surface temperature is 6460 with its spectral types of F6V
  • In this planetary system, the extrasolar planet HD 73344 b orbits around the star HD 73344 every 15.6 days with its orbital distance of 0.13 AU ( 19911476.6 km)
  • (Projected orbit of HD 73344 b around its host star HD 73344)


  • The Star HD 73344 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.293 AU ( 193401209.6 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.787 AU ( 267331013.4 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.723 AU ( 407353304.2 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 4.007 AU ( 599438232.1 km)
  • Radiation at Planetary Boundary of HD 73344 b : 246519.25 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 73344)



  • Kopparapu Recent Venus for Star HD 73344 distance : 1.286 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 73344 distance : 1.629 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 73344 distance : 1.573 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 73344 distance : 1.723 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 73344 distance : 2.835 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 73344 distance : 2.990 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 73344)



  • Original Kopparapu Recent Venus for Star HD 73344 distance : 1.307 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 73344 distance : 1.670 AU
  • Original Kopparapu Moist Greenhouse for Star HD 73344 distance : 1.729 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 73344 distance : 2.886 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 73344 distance : 3.001 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 73344)



    (Position in Stellar Map of star HD 73344 and its Exoplanet HD 73344 b)



    (Zoomed position in Stellar Map of star HD 73344 and its Exoplanet HD 73344 b (zoom level 3))

    (Synthetic Spectrum of star HD 73344*)
    *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