Imaginary Picture of BD+48 738 b

Display orbital revolution of BD+48 738 b around the hoststar BD +48 738
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Exoplanet Name : BD+48 738 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 0.9100 (Mjup) 289.3236 (Mearth)
Semi Major Axis / Orbital Distance Calculated 1.0000 (AU) 1.0000 (AU Est.)
Eccentricity : 0.2000
Orbital Period(Yrs) 1.0749
Orbital Period(Observed/Estimated) 392.60 (Days Obs.) 424.59 (Days Est.)
Surface Gravity (G Earth) 2.7941
Star Radiation at Atmospheric Boundary: 56327.4 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 687.6 (K)
Blackbody T 0.3(K) 645.7 (K)
Blackbody T 0.7(K) 522.4 (K)
Tidally Locked Blackbody T 0.1(K) 817.7 (K)
Tidally Locked Blackbody T 0.3(K) 767.9 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Radial Velocity
Mass Detection :
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : BD +48 738
Alternate Name :
Star Distance(LY) : 0.0
Stellar Radius(Rsun) : 11.0 (Rsun Measured)
Stellar Mass(Msun) : 0.7 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 4414 (K)
Spectral type : K0III
UV portion[%]: 1.3
Visible portion[%]: 29.6
IR portion[%]: 69.1
Metalicity : -0.2
Absolute Magnitude: 25.0
Apparent Magnitude: 9.1
Right Ascension(RA) 40.7103
Declination (DEC) 49.5869
Hubble Space Telescope Guide Star Catalog (GSC) ID 03304-00323
Discovered by
Discovery Paper - Authors 0
Discovery Paper - Title 0
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=BD%2B48+738+&submit=SIMBAD+search
Open Exoplanet Database Link 0
BD+48 738 b
BD+48 738 b

  • BD+48 738 b is an exoplanet orbiting the star BD +48 738. Its discovery was publicly announced on 2011.
  • The host star BD +48 738 has apparent magnitude of 9.1, with absolute magnitude of 25.0.
  • It is 0.7 times more massive and 11.0 times bigger compared with our Sun. The surface temperature is 4414 with its spectral types of K0III
  • In this planetary system, the extrasolar planet BD+48 738 b orbits around the star BD +48 738 every 392.6 days with its orbital distance of 1.00 AU ( 149597870.7 km)
  • (Projected orbit of BD+48 738 b around its host star BD +48 738)


  • The Star BD +48 738 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 4.643 AU ( 694569094.8 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 6.418 AU ( 960076001.7 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 9.779 AU ( 1462943362.2 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 14.390 AU ( 2152785244.9 km)
  • Radiation at Planetary Boundary of BD+48 738 b : 56327.37 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star BD +48 738)



  • Kopparapu Recent Venus for Star BD +48 738 distance : 5.143 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star BD +48 738 distance : 6.510 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star BD +48 738 distance : 6.288 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star BD +48 738 distance : 6.907 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star BD +48 738 distance : 12.108 AU
  • Kopparapu Outer Boundary for Early Mars for Star BD +48 738 distance : 12.772 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star BD +48 738)



  • Original Kopparapu Recent Venus for Star BD +48 738 distance : 5.074 AU
  • Original Kopparapu Runaway Greenhouse for Star BD +48 738 distance : 6.723 AU
  • Original Kopparapu Moist Greenhouse for Star BD +48 738 distance : 6.714 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star BD +48 738 distance : 12.305 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star BD +48 738 distance : 12.796 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star BD +48 738)



    (Position in Stellar Map of star BD +48 738 and its Exoplanet BD+48 738 b)



    (Zoomed position in Stellar Map of star BD +48 738 and its Exoplanet BD+48 738 b (zoom level 3))

    (Synthetic Spectrum of star BD +48 738*)
    *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