Imaginary Picture of HD 38677 d

Display orbital revolution of HD 38677 d around the hoststar HD 38677
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Exoplanet Name : HD 38677 d
Alternate Name : DMPP-1 d
Status : Confirmed
Radius (Rjup / Re): 1.3930 (Rjup) 15.6141 (Rearth)
Mass (Mjup / Me): 0.0105 (Mjup) 3.3511 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0422 (AU) 0.0422 (AU Est.)
Eccentricity : 0.0700
Orbital Period(Yrs) 0.0079
Orbital Period(Observed/Estimated) 2.88 (Days Obs.) 2.88 (Days Est.)
Surface Gravity (G Earth) 0.0137
Star Radiation at Atmospheric Boundary: 1611263.7 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1590.1 (K)
Blackbody T 0.3(K) 1493.3 (K)
Blackbody T 0.7(K) 1208.2 (K)
Tidally Locked Blackbody T 0.1(K) 1891.0 (K)
Tidally Locked Blackbody T 0.3(K) 1775.8 (K)
Size Class: Super-Jupiter-size
Mass Class:
Detection Type : Radial Velocity
Mass Detection : Spectrum
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : HD 38677
Alternate Name :
Star Distance(LY) : 204.3
Stellar Radius(Rsun) : 1.3 (Rsun Measured)
Stellar Mass(Msun) : 1.2 (Msun Measured) 1.2 (Msun Estimated)
Star Age : 2.0 (GY)
Temperature : 6196 (K)
Spectral type : F8V
UV portion[%]: 7.8
Visible portion[%]: 44.8
IR portion[%]: 47.4
Metalicity : 0.0
Absolute Magnitude: 4.0
Apparent Magnitude: 8.0
Right Ascension(RA) 86.7761
Declination (DEC) -10.6303
Hubble Space Telescope Guide Star Catalog (GSC) ID 05351-00434
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=HD+38677+&submit=SIMBAD+search
Open Exoplanet Database Link
HD 38677 d
HD 38677 d

  • HD 38677 d is an exoplanet orbiting the star HD 38677, located about 204.3 light-years (62.7 pc) away from Solar System. Its discovery was publicly announced on 2020.
  • The host star HD 38677 has apparent magnitude of 8.0, with absolute magnitude of 4.0.
  • It is 1.2 times more massive and 1.3 times bigger compared with our Sun. The surface temperature is 6196 with its spectral types of F8V
  • In this planetary system, the extrasolar planet HD 38677 d orbits around the star HD 38677 every 2.9 days with its orbital distance of 0.04 AU ( 6313030.1 km)
  • (Projected orbit of HD 38677 d around its host star HD 38677)


  • The Star HD 38677 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.048 AU ( 156765855.1 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.448 AU ( 216691379.6 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.207 AU ( 330189708.8 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 3.248 AU ( 485888621.2 km)
  • Radiation at Planetary Boundary of HD 38677 d : 1611263.75 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 38677)



  • Kopparapu Recent Venus for Star HD 38677 distance : 1.059 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 38677 distance : 1.341 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 38677 distance : 1.295 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 38677 distance : 1.419 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 38677 distance : 2.345 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 38677 distance : 2.473 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 38677)



  • Original Kopparapu Recent Venus for Star HD 38677 distance : 1.070 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 38677 distance : 1.376 AU
  • Original Kopparapu Moist Greenhouse for Star HD 38677 distance : 1.415 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 38677 distance : 2.387 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 38677 distance : 2.483 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 38677)



    (Position in Stellar Map of star HD 38677 and its Exoplanet HD 38677 d)



    (Zoomed position in Stellar Map of star HD 38677 and its Exoplanet HD 38677 d (zoom level 3))

    (Synthetic Spectrum of star HD 38677*)
    *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