Imaginary Picture of HD 22496 b

Display orbital revolution of HD 22496 b around the hoststar HD 22496
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Exoplanet Name : HD 22496 b
Alternate Name : "GJ 146, HIP 16711"
Status : Confirmed
Radius (Rjup / Re): 0.1402 (Rjup) 1.5712 (Rearth)
Mass (Mjup / Me): 0.0175 (Mjup) 5.5735 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0510 (AU) 0.0510 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0139
Orbital Period(Observed/Estimated) 5.09 (Days Obs.) 5.09 (Days Est.)
Surface Gravity (G Earth) 2.2575
Star Radiation at Atmospheric Boundary: 79188.6 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 748.7 (K)
Blackbody T 0.3(K) 703.1 (K)
Blackbody T 0.7(K) 568.9 (K)
Tidally Locked Blackbody T 0.1(K) 890.4 (K)
Tidally Locked Blackbody T 0.3(K) 836.1 (K)
Size Class: super-Earth-size
Mass Class:
Detection Type : Radial Velocity
Mass Detection : Radial Velocity
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : HD 22496
Alternate Name : "GJ 146, HIP 16711"
Star Distance(LY) : 44.4
Stellar Radius(Rsun) : 0.7 (Rsun Measured)
Stellar Mass(Msun) : 0.7 (Msun Measured) 0.7 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 4385 (K)
Spectral type : K5
UV portion[%]: 1.2
Visible portion[%]: 29.1
IR portion[%]: 69.7
Metalicity : -0.1
Absolute Magnitude: 7.3
Apparent Magnitude: 8.0
Right Ascension(RA) 53.7583
Declination (DEC) -48.4172
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal
Discovery Paper - URL
SIMBAD LINK https://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+22496&submit=SIMBAD+search
Open Exoplanet Database Link
HD 22496 b
HD 22496 b

  • HD 22496 b is an exoplanet orbiting the star HD 22496, located about 44.4 light-years (13.6 pc) away from Solar System. Its discovery was publicly announced on 2021.
  • The host star HD 22496 has apparent magnitude of 8.0, with absolute magnitude of 7.3.
  • It is 0.7 times more massive and 0.7 times bigger compared with our Sun. The surface temperature is 4385 with its spectral types of K5
  • In this planetary system, the extrasolar planet HD 22496 b orbits around the star HD 22496 every 5.1 days with its orbital distance of 0.05 AU ( 7629491.4 km)
  • (Projected orbit of HD 22496 b around its host star HD 22496)


  • The Star HD 22496 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.281 AU ( 42000765.4 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.388 AU ( 58056033.8 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.591 AU ( 88464547.8 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.870 AU ( 130179457.5 km)
  • Radiation at Planetary Boundary of HD 22496 b : 79188.60 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 22496)



  • Kopparapu Recent Venus for Star HD 22496 distance : 0.311 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 22496 distance : 0.394 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 22496 distance : 0.381 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 22496 distance : 0.418 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 22496 distance : 0.734 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 22496 distance : 0.774 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 22496)



  • Original Kopparapu Recent Venus for Star HD 22496 distance : 0.307 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 22496 distance : 0.407 AU
  • Original Kopparapu Moist Greenhouse for Star HD 22496 distance : 0.406 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 22496 distance : 0.746 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 22496 distance : 0.776 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 22496)



    (Position in Stellar Map of star HD 22496 and its Exoplanet HD 22496 b)



    (Zoomed position in Stellar Map of star HD 22496 and its Exoplanet HD 22496 b (zoom level 3))

    (Synthetic Spectrum of star HD 22496*)
    *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