Imaginary Picture of WASP-38 b

Display orbital revolution of WASP-38 b around the hoststar WASP-38
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Exoplanet Name : WASP-38 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 1.0790 (Rjup) 12.0945 (Rearth)
Mass (Mjup / Me): 2.7120 (Mjup) 862.2479 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0755 (AU) 0.0755 (AU Est.)
Eccentricity : 0.0321
Orbital Period(Yrs) 0.0188
Orbital Period(Observed/Estimated) 6.87 (Days Obs.) 6.87 (Days Est.)
Surface Gravity (G Earth) 5.8946
Star Radiation at Atmospheric Boundary: 573273.2 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1228.1 (K)
Blackbody T 0.3(K) 1153.3 (K)
Blackbody T 0.7(K) 933.2 (K)
Tidally Locked Blackbody T 0.1(K) 1460.5 (K)
Tidally Locked Blackbody T 0.3(K) 1371.5 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Primary Transit
Mass Detection :
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : WASP-38
Alternate Name :
Star Distance(LY) : 449.3
Stellar Radius(Rsun) : 1.4 (Rsun Measured)
Stellar Mass(Msun) : 1.2 (Msun Measured) 1.2 (Msun Estimated)
Star Age : 5.0 (GY)
Temperature : 6150 (K)
Spectral type : F8
UV portion[%]: 0.3
Visible portion[%]: 1.5
IR portion[%]: 98.2
Metalicity : -0.1
Absolute Magnitude: 3.7
Apparent Magnitude: 9.4
Right Ascension(RA) 243.9599
Declination (DEC) 10.0325
Hubble Space Telescope Guide Star Catalog (GSC) ID 00950-01156
Discovered by
Discovery Paper - Authors "S. C. C. Barros, F. Faedi, A. Collier Cameron, T. A. Lister, J. McCormac, D. Pollacco, E. K. Simpson, B. Smalley, R. A. Street, I. Todd, A. H. M. J. Triaud, I. Boisse, F. Bouchy, G. H_brard, C. Moutou, F. Pepe, D. Queloz, A. Santerne, D. Segransan, S. Udry, J. Bento, O. W. Butters, B. Enoch, C. A. Haswell, C. Hellier, F. P. Keenan, G. R. M. Miller, V. Moulds, A. J. Norton, N. Parley, I. Skillen, C. A. Watson, R. G. West and P. J. Wheatley"
Discovery Paper - Title "WASP-38b: a transiting exoplanet in an eccentric, 6.87d period orbit"
Discovery Paper - Journal "A&A 525, A54 (2011)DOI https://doi.org/10.1051/0004-6361/201015800"
Discovery Paper - URL http://www.aanda.org/articles/aa/abs/2011/01/aa15800-10/aa15800-10.html
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=WASP-38++&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/WASP-38%20b/
WASP-38 b
WASP-38 b
  • WASP-38 b is an exoplanet orbiting the star WASP-38, located about 449.3 light-years (137.7 pc) away from Solar System. Its discovery was publicly announced on 2010.
  • The host star WASP-38 has apparent magnitude of 9.4, with absolute magnitude of 3.7.
  • It is 1.2 times more massive and 1.4 times bigger compared with our Sun. The surface temperature is 6150 with its spectral types of F8
  • In this planetary system, the extrasolar planet WASP-38 b orbits around the star WASP-38 every 6.9 days with its orbital distance of 0.08 AU ( 11296135.2 km)
    • (Projected orbit of WASP-38 b around its host star WASP-38)


  • The Star WASP-38 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.118 AU ( 167317356.9 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.546 AU ( 231276312.5 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.356 AU ( 352413918.9 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 3.467 AU ( 518592519.9 km)
  • Radiation at Planetary Boundary of WASP-38 b : 573273.20 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star WASP-38)



  • Kopparapu Recent Venus for Star WASP-38 distance : 1.133 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star WASP-38 distance : 1.435 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star WASP-38 distance : 1.386 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star WASP-38 distance : 1.519 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star WASP-38 distance : 2.512 AU
  • Kopparapu Outer Boundary for Early Mars for Star WASP-38 distance : 2.650 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star WASP-38)



  • Original Kopparapu Recent Venus for Star WASP-38 distance : 1.144 AU
  • Original Kopparapu Runaway Greenhouse for Star WASP-38 distance : 1.473 AU
  • Original Kopparapu Moist Greenhouse for Star WASP-38 distance : 1.513 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star WASP-38 distance : 2.557 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star WASP-38 distance : 2.659 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star WASP-38)



    (Position in Stellar Map of star WASP-38 and its Exoplanet WASP-38 b)



    (Zoomed position in Stellar Map of star WASP-38 and its Exoplanet WASP-38 b (zoom level 3))

    (Synthetic Spectrum of star WASP-38*)
    *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