Imaginary Picture of HIP 8541 Ac

Display orbital revolution of HIP 8541 Ac around the hoststar HIP 8541 A
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Exoplanet Name : HIP 8541 Ac
Alternate Name : HD 11343 c
Status : Confirmed
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 0.8040 (Mjup) 255.6222 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.9230 (AU) 0.9230 (AU Est.)
Eccentricity : 0.1690
Orbital Period(Yrs) 0.6256
Orbital Period(Observed/Estimated) 228.50 (Days Obs.) 299.43 (Days Est.)
Surface Gravity (G Earth) 2.4686
Star Radiation at Atmospheric Boundary: 41975.2 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 638.8 (K)
Blackbody T 0.3(K) 599.9 (K)
Blackbody T 0.7(K) 485.4 (K)
Tidally Locked Blackbody T 0.1(K) 759.7 (K)
Tidally Locked Blackbody T 0.3(K) 713.4 (K)
Size Class: Jupiter-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 : HIP 8541 A
Alternate Name : HD 11343
Star Distance(LY) : 551.2
Stellar Radius(Rsun) : 7.8 (Rsun Measured)
Stellar Mass(Msun) : 1.2 (Msun Measured) 2.0 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 4670 (K)
Spectral type : K2III
UV portion[%]: 2.1
Visible portion[%]: 33.8
IR portion[%]: 64.1
Metalicity : -0.1
Absolute Magnitude: 1.8
Apparent Magnitude: 7.9
Right Ascension(RA) 27.5250
Declination (DEC) -54.4650
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
HIP 8541 Ac
HIP 8541 Ac

  • HIP 8541 Ac is an exoplanet orbiting the star HIP 8541 A, located about 551.2 light-years (169.0 pc) away from Solar System. Its discovery was publicly announced on 2022.
  • The host star HIP 8541 A has apparent magnitude of 7.9, with absolute magnitude of 1.8.
  • It is 1.2 times more massive and 7.8 times bigger compared with our Sun. The surface temperature is 4670 with its spectral types of K2III
  • In this planetary system, the extrasolar planet HIP 8541 Ac orbits around the star HIP 8541 A every 228.5 days with its orbital distance of 0.92 AU ( 138078834.7 km)
  • (Projected orbit of HIP 8541 Ac around its host star HIP 8541 A)


  • The Star HIP 8541 A 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 3.699 AU ( 553418452.5 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 5.114 AU ( 764968926.9 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 7.792 AU ( 1165643357.4 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 11.466 AU ( 1715295264.0 km)
  • Radiation at Planetary Boundary of HIP 8541 Ac : 41975.17 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HIP 8541 A)



  • Kopparapu Recent Venus for Star HIP 8541 A distance : 4.060 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HIP 8541 A distance : 5.140 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HIP 8541 A distance : 4.965 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HIP 8541 A distance : 5.451 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HIP 8541 A distance : 9.447 AU
  • Kopparapu Outer Boundary for Early Mars for Star HIP 8541 A distance : 9.965 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HIP 8541 A)



  • Original Kopparapu Recent Venus for Star HIP 8541 A distance : 4.008 AU
  • Original Kopparapu Runaway Greenhouse for Star HIP 8541 A distance : 5.303 AU
  • Original Kopparapu Moist Greenhouse for Star HIP 8541 A distance : 5.303 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HIP 8541 A distance : 9.603 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HIP 8541 A distance : 9.987 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HIP 8541 A)



    (Position in Stellar Map of star HIP 8541 A and its Exoplanet HIP 8541 Ac)



    (Zoomed position in Stellar Map of star HIP 8541 A and its Exoplanet HIP 8541 Ac (zoom level 3))

    (Synthetic Spectrum of star HIP 8541 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