Imaginary Picture of BD-06 1339 e

Display orbital revolution of BD-06 1339 e around the hoststar BD-06 1339
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Exoplanet Name : BD-06 1339 e
Alternate Name : GJ 221 e
Status : Confirmed
Radius (Rjup / Re): 0.1226 (Rjup) 1.3745 (Rearth)
Mass (Mjup / Me): 0.0104 (Mjup) 3.3066 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0300 (AU) 0.0300 (AU Est.)
Eccentricity : 0.0300
Orbital Period(Yrs) 0.0066
Orbital Period(Observed/Estimated) 2.39 (Days Obs.) 2.27 (Days Est.)
Surface Gravity (G Earth) 1.7502
Star Radiation at Atmospheric Boundary: 177479.6 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 916.1 (K)
Blackbody T 0.3(K) 860.3 (K)
Blackbody T 0.7(K) 696.1 (K)
Tidally Locked Blackbody T 0.1(K) 1089.4 (K)
Tidally Locked Blackbody T 0.3(K) 1023.1 (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 : BD-06 1339
Alternate Name : GJ 221
Star Distance(LY) : 66.1
Stellar Radius(Rsun) : 0.6 (Rsun Estimated)
Stellar Mass(Msun) : 0.7 (Msun Measured) 0.6 (Msun Estimated)
Star Age : 4.4 (GY)
Temperature : 4324 (K)
Spectral type : K7V/M0V
UV portion[%]: 1.0
Visible portion[%]: 27.9
IR portion[%]: 71.1
Metalicity : -0.1
Absolute Magnitude: 5.2
Apparent Magnitude: 6.7
Right Ascension(RA) 88.2512
Declination (DEC) -5.9947
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal
Discovery Paper - URL
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=GJ+221+&submit=SIMBAD+search
Open Exoplanet Database Link
BD-06 1339 e
BD-06 1339 e

  • BD-06 1339 e is an exoplanet orbiting the star BD-06 1339, located about 66.1 light-years (20.3 pc) away from Solar System. Its discovery was publicly announced on 2019.
  • The host star BD-06 1339 has apparent magnitude of 6.7, with absolute magnitude of 5.2.
  • It is 0.7 times more massive and 0.6 times bigger compared with our Sun. The surface temperature is 4324 with its spectral types of K7V/M0V
  • In this planetary system, the extrasolar planet BD-06 1339 e orbits around the star BD-06 1339 every 2.4 days with its orbital distance of 0.03 AU ( 4487936.1 km)
  • (Projected orbit of BD-06 1339 e around its host star BD-06 1339)


  • The Star BD-06 1339 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.247 AU ( 36987172.9 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.342 AU ( 51125938.8 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.521 AU ( 77904616.7 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.766 AU ( 114640056.2 km)
  • Radiation at Planetary Boundary of BD-06 1339 e : 177479.56 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star BD-06 1339)



  • Kopparapu Recent Venus for Star BD-06 1339 distance : 0.275 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star BD-06 1339 distance : 0.348 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star BD-06 1339 distance : 0.336 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star BD-06 1339 distance : 0.369 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star BD-06 1339 distance : 0.649 AU
  • Kopparapu Outer Boundary for Early Mars for Star BD-06 1339 distance : 0.685 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star BD-06 1339)



  • Original Kopparapu Recent Venus for Star BD-06 1339 distance : 0.271 AU
  • Original Kopparapu Runaway Greenhouse for Star BD-06 1339 distance : 0.359 AU
  • Original Kopparapu Moist Greenhouse for Star BD-06 1339 distance : 0.359 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star BD-06 1339 distance : 0.660 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star BD-06 1339 distance : 0.686 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star BD-06 1339)



    (Position in Stellar Map of star BD-06 1339 and its Exoplanet BD-06 1339 e)



    (Zoomed position in Stellar Map of star BD-06 1339 and its Exoplanet BD-06 1339 e (zoom level 3))

    (Synthetic Spectrum of star BD-06 1339*)
    *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