Imaginary Picture of HD 26161 Ab

Display orbital revolution of HD 26161 Ab around the hoststar HD 26161 A
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Exoplanet Name : HD 26161 Ab
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 28.4600 (Mjup) 9048.5155 (Mearth)
Semi Major Axis / Orbital Distance Calculated 10.0870 (AU) 10.0870 (AU Est.)
Eccentricity : 0.9220
Orbital Period(Yrs) 29.9576
Orbital Period(Observed/Estimated) 10942.30 (Days Obs.) 11056.67 (Days Est.)
Surface Gravity (G Earth) 87.3845
Star Radiation at Atmospheric Boundary: 33.1 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 107.0 (K)
Blackbody T 0.3(K) 100.5 (K)
Blackbody T 0.7(K) 81.3 (K)
Tidally Locked Blackbody T 0.1(K) 127.3 (K)
Tidally Locked Blackbody T 0.3(K) 119.5 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : "Radial Velocity, Astrometry"
Mass Detection : Astrometry
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : HD 26161 A
Alternate Name : HO 327 A
Star Distance(LY) : 133.4
Stellar Radius(Rsun) : 1.4 (Rsun Measured)
Stellar Mass(Msun) : 1.1 (Msun Measured) 1.1 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 6033 (K)
Spectral type : F9/G0IV-V
UV portion[%]: 0.3
Visible portion[%]: 1.5
IR portion[%]: 98.2
Metalicity : 0.0
Absolute Magnitude: 3.8
Apparent Magnitude: 6.9
Right Ascension(RA) 62.4083
Declination (DEC) 31.6522
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 26161 Ab
HD 26161 Ab

  • HD 26161 Ab is an exoplanet orbiting the star HD 26161 A, located about 133.4 light-years (40.9 pc) away from Solar System. Its discovery was publicly announced on 2021.
  • The host star HD 26161 A has apparent magnitude of 6.9, with absolute magnitude of 3.8.
  • It is 1.1 times more massive and 1.4 times bigger compared with our Sun. The surface temperature is 6033 with its spectral types of F9/G0IV-V
  • In this planetary system, the extrasolar planet HD 26161 Ab orbits around the star HD 26161 A every 10942.3 days with its orbital distance of 10.09 AU ( 1508993721.8 km)
  • (Projected orbit of HD 26161 Ab around its host star HD 26161 A)


  • The Star HD 26161 A 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.135 AU ( 169740531.2 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.568 AU ( 234625772.7 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.390 AU ( 357517755.0 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 3.517 AU ( 526103038.3 km)
  • Radiation at Planetary Boundary of HD 26161 Ab : 33.06 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 26161 A)



  • Kopparapu Recent Venus for Star HD 26161 A distance : 1.158 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 26161 A distance : 1.466 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 26161 A distance : 1.416 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 26161 A distance : 1.552 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 26161 A distance : 2.573 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 26161 A distance : 2.714 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 26161 A)



  • Original Kopparapu Recent Venus for Star HD 26161 A distance : 1.166 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 26161 A distance : 1.506 AU
  • Original Kopparapu Moist Greenhouse for Star HD 26161 A distance : 1.542 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 26161 A distance : 2.619 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 26161 A distance : 2.724 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 26161 A)



    (Position in Stellar Map of star HD 26161 A and its Exoplanet HD 26161 Ab)



    (Zoomed position in Stellar Map of star HD 26161 A and its Exoplanet HD 26161 Ab (zoom level 3))

    (Synthetic Spectrum of star HD 26161 A*)
    *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