Imaginary Picture of Kepler-278 b

Display orbital revolution of Kepler-278 b around the hoststar Kepler-278
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Exoplanet Name : Kepler-278 b
Alternate Name :
Radius (Rjup / Re): 0.3528 (Rjup) 3.9550 (Rearth)
Mass (Mjup / Me): 0.1760 (Mjup) 55.9571 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.2020 (AU) 0.2020 (AU Est.)
Eccentricity : 0.6960
Orbital Period(Yrs) 0.0826
Orbital Period(Observed/Estimated) 30.16 (Days Obs.) 0.00 (Days Est.)
Star Radiation at Atmospheric Boundary: 150677.9 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 879.3 (K)
Blackbody T 0.3(K) 825.8 (K)
Blackbody T 0.7(K) 668.2 (K)
Tidally Locked Blackbody T 0.1(K) 1045.7 (K)
Tidally Locked Blackbody T 0.3(K) 982.0 (K)
Size Class: Neptune-size
Mass Class:
Detection Type : Primary Transit
Mass Detection : TTV
Radius Detection : Primary Transit
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : Kepler-278
Alternate Name :
Star Distance(LY) : 1376.2
Stellar Radius(Rsun) : 2.8 (Rsun Measured)
Stellar Mass(Msun) : 0.0 (Msun Measured) 1.2 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5002 (K)
Spectral type : K2
Metalicity : 0.4
Absolute Magnitude: 1.9
Apparent Magnitude: 10.0
Right Ascension(RA) 290.1072
Declination (DEC) 38.7022
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors "Rowe,ason.; Bryson,tephen.; Marcy,eoffrey.; Lissauer,ack.; Jontof-Hutter,aniel; Mullally,ergal; Gilliland,onald.; Issacson,oward; Ford,ric; Howell,teve.; Borucki,illiam.; Haas,ichael; Huber,aniel; Steffen,ason.; Thompson,usan.; Quintana,lisa; Barclay,homas; Still,artin; Fortney,onathan; Gautier,..,II; Hunter,oger; Caldwell,ouglas.; Ciardi,avid.; Devore,dna; Cochran,illiam; Jenkins,on; Agol,ric; Carter,oshua.; Geary,ohn"
Discovery Paper - Title Validation of Kepler's Multiple Planet Candidates. III. Light Curve Analysis and Announcement of Hundreds of New Multi-planet Systems
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Kepler-278+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-278%20b/
Kepler-278 b
Kepler-278 b
  • Kepler-278 b is an exoplanet orbiting the star Kepler-278, located about 1376.2 light-years (421.9 pc) away from Solar System. Its discovery was publicly announced on 2014.
  • The host star Kepler-278 has apparent magnitude of 10.0, with absolute magnitude of 1.9.
  • In this planetary system, the extrasolar planet Kepler-278 b orbits around the star Kepler-278 every 30.2 days with its orbital distance of 0.20 AU ( 30218769.9 km)
    • (Projected orbit of Kepler-278 b around its host star Kepler-278)


  • The Star Kepler-278 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.534 AU ( 229473174.0 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 2.120 AU ( 317191895.0 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 3.231 AU ( 483330253.6 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 4.754 AU ( 711241641.5 km)
  • Radiation at Planetary Boundary of Kepler-278 b : 150677.95 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-278)



  • Kopparapu Recent Venus for Star Kepler-278 distance : 1.659 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-278 distance : 2.101 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-278 distance : 2.029 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-278 distance : 2.227 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-278 distance : 3.807 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-278 distance : 4.016 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-278)



  • Original Kopparapu Recent Venus for Star Kepler-278 distance : 1.642 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-278 distance : 2.165 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-278 distance : 2.172 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-278 distance : 3.871 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-278 distance : 4.026 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-278)



    (Position in Stellar Map of star Kepler-278 and its Exoplanet Kepler-278 b)



    (Zoomed position in Stellar Map of star Kepler-278 and its Exoplanet Kepler-278 b (zoom level 3))