Imaginary Picture of HD 103774 b
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Exoplanet Name : HD 103774 b
Alternate Name :
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 0.3670 (Mjup) 116.6832 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0700 (AU) 0.0700 (AU Est.)
Eccentricity : 0.0900
Orbital Period(Yrs) 0.0161
Orbital Period(Observed/Estimated) 5.89 (Days Obs.) 5.85 (Days Est.)
Star Radiation at Atmospheric Boundary: 655620.0 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1270.0 (K)
Blackbody T 0.3(K) 1192.7 (K)
Blackbody T 0.7(K) 965.0 (K)
Tidally Locked Blackbody T 0.1(K) 1510.3 (K)
Tidally Locked Blackbody T 0.3(K) 1418.3 (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 : HD 103774
Alternate Name :
Star Distance(LY) : 184.2
Stellar Radius(Rsun) : 1.2 (Rsun Estimated)
Stellar Mass(Msun) : 1.3 (Msun Measured) 1.3 (Msun Estimated)
Star Age : 1.1 (GY)
Temperature : 6489 (K)
Spectral type : F5V
Metalicity : 0.3
Absolute Magnitude: 3.4
Apparent Magnitude: 7.1
Right Ascension(RA) 179.2316
Declination (DEC) -12.1078
Hubble Space Telescope Guide Star Catalog (GSC) ID 05521-01086
Discovered by
Discovery Paper - Authors "G. Lo Curto, M. Mayor, W. Benz, F. Bouchy, G. H¡£¥åebrard, C. Lovis, C. Moutou, D. Naef, F. Pepe, D. Queloz, N.C. Santos, D. Segransan, and S. Udry"
Discovery Paper - Title The HARPS search for southern extrasolar planets XXXIII. New multi-planet systems in the HARPS volume limited sample: a super-Earth and a Neptune in the habitable zone.
Discovery Paper - Journal "7 pages, 14 figures, accepted for publication by A&A, 04-01-2013"
Discovery Paper - URL https://arxiv.org/abs/1301.2741
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+103774+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/HD%20103774%20b/
HD 103774 b
HD 103774 b

  • HD 103774 b is an exoplanet orbiting the star HD 103774, located about 184.2 light-years (56.5 pc) away from Solar System. Its discovery was publicly announced on 2013.
  • The host star HD 103774 has apparent magnitude of 7.1, with absolute magnitude of 3.4.
  • It is 1.3 times more massive and 1.2 times bigger compared with our Sun. The surface temperature is 6489 with its spectral types of F5V
  • In this planetary system, the extrasolar planet HD 103774 b orbits around the star HD 103774 every 5.9 days with its orbital distance of 0.07 AU ( 10471850.9 km)
  • (Projected orbit of HD 103774 b around its host star HD 103774)


  • The Star HD 103774 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.109 AU ( 165874588.7 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.533 AU ( 229282029.7 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.335 AU ( 349375073.3 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 3.437 AU ( 514120725.5 km)
  • Radiation at Planetary Boundary of HD 103774 b : 655620.05 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 103774)



  • Kopparapu Recent Venus for Star HD 103774 distance : 1.101 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 103774 distance : 1.394 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 103774 distance : 1.347 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 103774 distance : 1.475 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 103774 distance : 2.426 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 103774 distance : 2.559 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 103774)



  • Original Kopparapu Recent Venus for Star HD 103774 distance : 1.120 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 103774 distance : 1.429 AU
  • Original Kopparapu Moist Greenhouse for Star HD 103774 distance : 1.481 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 103774 distance : 2.470 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 103774 distance : 2.569 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 103774)



    (Position in Stellar Map of star HD 103774 and its Exoplanet HD 103774 b)



    (Zoomed position in Stellar Map of star HD 103774 and its Exoplanet HD 103774 b (zoom level 3))