Imaginary Picture of AU Mic b

Display orbital revolution of AU Mic b around the hoststar AU Mic
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Exoplanet Name : AU Mic b
Alternate Name :
Radius (Rjup / Re): 0.3750 (Rjup) 4.2034 (Rearth)
Mass (Mjup / Me): 0.1800 (Mjup) 57.2288 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0660 (AU) 0.0660 (AU Est.)
Eccentricity : 0.1000
Orbital Period(Yrs) 0.0232
Orbital Period(Observed/Estimated) 8.46 (Days Obs.) 8.76 (Days Est.)
Surface Gravity (G Earth) 3.2391
Star Radiation at Atmospheric Boundary: 29678.8 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 585.8 (K)
Blackbody T 0.3(K) 550.1 (K)
Blackbody T 0.7(K) 445.1 (K)
Tidally Locked Blackbody T 0.1(K) 696.6 (K)
Tidally Locked Blackbody T 0.3(K) 654.2 (K)
Size Class: Neptune-size
Mass Class:
Detection Type : Primary Transit
Mass Detection : Radial Velocity
Radius Detection : Primary Transit
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : AU Mic
Alternate Name :
Star Distance(LY) : 31.9
Stellar Radius(Rsun) : 0.8 (Rsun Measured)
Stellar Mass(Msun) : 0.5 (Msun Measured) 0.5 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 3700 (K)
Spectral type : M1V
Metalicity : 0.0
Absolute Magnitude: 8.6
Apparent Magnitude: 8.6
Right Ascension(RA) 311.2917
Declination (DEC) -31.3408
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors "Peter Plavchan , Thomas Barclay et al."
Discovery Paper - Title A planet within the debris disk around the pre-main-sequence star AU Microscopii
Discovery Paper - Journal "Nature, 582, 497"
Discovery Paper - URL https://www.nature.com/articles/s41586-020-2400-z
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=AU+MIC&submit=SIMBAD+search
Open Exoplanet Database Link
AU Mic b
AU Mic b

  • AU Mic b is an exoplanet orbiting the star AU Mic, located about 31.9 light-years ( 9.8 pc) away from Solar System.
  • The host star AU Mic has apparent magnitude of 8.6, with absolute magnitude of 8.6.
  • It is 0.5 times more massive and 0.8 times bigger compared with our Sun. The surface temperature is 3700 with its spectral types of M1V
  • In this planetary system, the extrasolar planet AU Mic b orbits around the star AU Mic every 8.5 days with its orbital distance of 0.07 AU ( 9873459.5 km)
  • (Projected orbit of AU Mic b around its host star AU Mic)


  • The Star AU Mic 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.222 AU ( 33275364.7 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.307 AU ( 45995249.9 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.468 AU ( 70086582.1 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.689 AU ( 103135475.9 km)
  • Radiation at Planetary Boundary of AU Mic b : 29678.80 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star AU Mic)



  • Kopparapu Recent Venus for Star AU Mic distance : 0.251 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star AU Mic distance : 0.317 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star AU Mic distance : 0.306 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star AU Mic distance : 0.337 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star AU Mic distance : 0.611 AU
  • Kopparapu Outer Boundary for Early Mars for Star AU Mic distance : 0.645 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star AU Mic)



  • Original Kopparapu Recent Venus for Star AU Mic distance : 0.248 AU
  • Original Kopparapu Runaway Greenhouse for Star AU Mic distance : 0.328 AU
  • Original Kopparapu Moist Greenhouse for Star AU Mic distance : 0.328 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star AU Mic distance : 0.621 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star AU Mic distance : 0.646 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star AU Mic)



    (Position in Stellar Map of star AU Mic and its Exoplanet AU Mic b)



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