Imaginary Picture of HD 103774 A b
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Exoplanet Name : HD 103774 A b
Alternate Name : HD 103774 b
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 A
Alternate Name : HD 103774
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¥¹¡£¥¹¥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 A b
HD 103774 A b

  • HD 103774 A b is an exoplanet orbiting the star HD 103774 A, 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 A 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 A b orbits around the star HD 103774 A every 5.9 days with its orbital distance of 0.07 AU ( 10471850.9 km)
  • (Projected orbit of HD 103774 A b around its host star HD 103774 A)


  • The Star HD 103774 A '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 A b : 655620.05 W/m2

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



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

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



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

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



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



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