Imaginary Picture of MOA-2011-BLG-291 b

Display orbital revolution of MOA-2011-BLG-291 b around the hoststar MOA-2011-BLG-291
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Exoplanet Name : MOA-2011-BLG-291 b
Alternate Name :
Radius (Rjup / Re): 0.2471 (Rjup) 2.7694 (Rearth)
Mass (Mjup / Me): 0.0850 (Mjup) 27.0247 (Mearth)
Semi Major Axis / Orbital Distance Calculated 1.4000 (AU) 1.4000 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0000
Orbital Period(Observed/Estimated) 0.00 (Days Obs.) 1289.94 (Days Est.)
Surface Gravity (G Earth) 3.5237
Star Radiation at Atmospheric Boundary: 4.5 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 65.2 (K)
Blackbody T 0.3(K) 61.2 (K)
Blackbody T 0.7(K) 49.5 (K)
Tidally Locked Blackbody T 0.1(K) 77.5 (K)
Tidally Locked Blackbody T 0.3(K) 72.8 (K)
Size Class: sub-Neptune-size
Mass Class:
Detection Type : Microlensing
Mass Detection : Microlensing
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : MOA-2011-BLG-291
Alternate Name :
Star Distance(LY) : 22830.9
Stellar Radius(Rsun) : 0.2 (Rsun Estimated)
Stellar Mass(Msun) : 0.2 (Msun Measured) 0.0 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 3300 (K)
Spectral type : M9
UV portion[%]: 0.2
Visible portion[%]: 11.2
IR portion[%]: 88.6
Metalicity : 0.0
Absolute Magnitude: 7.8
Apparent Magnitude: 22.0
Right Ascension(RA) 268.8667
Declination (DEC) -29.1706
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
MOA-2011-BLG-291 b
MOA-2011-BLG-291 b

  • MOA-2011-BLG-291 b is an exoplanet orbiting the star MOA-2011-BLG-291, located about 22830.9 light-years (7000.0 pc) away from Solar System. Its discovery was publicly announced on 2018.
  • The host star MOA-2011-BLG-291 has apparent magnitude of 22.0, with absolute magnitude of 7.8.
  • It is 0.2 times more massive and 0.2 times bigger compared with our Sun. The surface temperature is 3300 with its spectral types of M9
  • (Projected orbit of MOA-2011-BLG-291 b around its host star MOA-2011-BLG-291)


  • The Star MOA-2011-BLG-291 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.058 AU ( 8733191.1 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.081 AU ( 12071552.4 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.123 AU ( 18394374.4 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.181 AU ( 27068127.7 km)
  • Radiation at Planetary Boundary of MOA-2011-BLG-291 b : 4.54 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star MOA-2011-BLG-291)



  • Kopparapu Recent Venus for Star MOA-2011-BLG-291 distance : 0.066 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star MOA-2011-BLG-291 distance : 0.084 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star MOA-2011-BLG-291 distance : 0.081 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star MOA-2011-BLG-291 distance : 0.089 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star MOA-2011-BLG-291 distance : 0.164 AU
  • Kopparapu Outer Boundary for Early Mars for Star MOA-2011-BLG-291 distance : 0.173 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star MOA-2011-BLG-291)



  • Original Kopparapu Recent Venus for Star MOA-2011-BLG-291 distance : 0.066 AU
  • Original Kopparapu Runaway Greenhouse for Star MOA-2011-BLG-291 distance : 0.087 AU
  • Original Kopparapu Moist Greenhouse for Star MOA-2011-BLG-291 distance : 0.087 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star MOA-2011-BLG-291 distance : 0.167 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star MOA-2011-BLG-291 distance : 0.174 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star MOA-2011-BLG-291)



    (Position in Stellar Map of star MOA-2011-BLG-291 and its Exoplanet MOA-2011-BLG-291 b)



    (Zoomed position in Stellar Map of star MOA-2011-BLG-291 and its Exoplanet MOA-2011-BLG-291 b (zoom level 3))

    (Synthetic Spectrum of star MOA-2011-BLG-291*)
    *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