Imaginary Picture of Kepler-1278 b

Display orbital revolution of Kepler-1278 b around the hoststar Kepler-1278
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Exoplanet Name : Kepler-1278 b
Alternate Name : "2MASS J18514966+4249322 b, K02561.01, KIC 7259298 b, KOI-2561 b, KOI-2561.01, WISE J185149.66+424932.1 b"
Status : Confirmed
Radius (Rjup / Re): 0.0900 (Rjup) 1.0088 (Rearth)
Mass (Mjup / Me): 0.0032 (Mjup) 1.0098 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.0444 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0089
Orbital Period(Observed/Estimated) 3.24 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 0.9922
Star Radiation at Atmospheric Boundary: 1602458.2 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1588.0 (K)
Blackbody T 0.3(K) 1491.3 (K)
Blackbody T 0.7(K) 1206.6 (K)
Tidally Locked Blackbody T 0.1(K) 1888.4 (K)
Tidally Locked Blackbody T 0.3(K) 1773.4 (K)
Size Class: Earth-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 : Kepler-1278
Alternate Name : "2MASS J18514966+4249322, KIC 7259298, KOI-2561, WISE J185149.66+424932.1"
Star Distance(LY) : 2900.3
Stellar Radius(Rsun) : 1.4 (Rsun Measured)
Stellar Mass(Msun) : 1.1 (Msun Measured) 1.1 (Msun Estimated)
Star Age : 3.3 (GY)
Temperature : 6010 (K)
Spectral type : G0
UV portion[%]: 0.3
Visible portion[%]: 1.5
IR portion[%]: 98.2
Metalicity : 0.0
Absolute Magnitude: 2.9
Apparent Magnitude: 12.6
Right Ascension(RA) 282.9569
Declination (DEC) 42.8256
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors "Timothy D. Morton1, Stephen T. Bryson2, Jeffrey L. Coughlin2,3, Jason F. Rowe4, Ganesh Ravichandran5, Erik A. Petigura6,7, Michael R. Haas2, and Natalie M. Batalha15"
Discovery Paper - Title FALSE POSITIVE PROBABILITIES FOR ALL KEPLER OBJECTS OF INTEREST: 1284 NEWLY VALIDATED PLANETS AND 449 LIKELY FALSE POSITIVES
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Kepler-1278+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-1278%20b/
Kepler-1278 b
Kepler-1278 b

  • Kepler-1278 b is an exoplanet orbiting the star Kepler-1278, located about 2900.3 light-years (889.2 pc) away from Solar System. Its discovery was publicly announced on 2016.
  • The host star Kepler-1278 has apparent magnitude of 12.6, with absolute magnitude of 2.9.
  • It is 1.1 times more massive and 1.4 times bigger compared with our Sun. The surface temperature is 6010 with its spectral types of G0
  • In this planetary system, the extrasolar planet Kepler-1278 b orbits around the star Kepler-1278 every 3.2 days with its orbital distance of 0.04 AU ( 6636674.4 km)
  • (Projected orbit of Kepler-1278 b around its host star Kepler-1278)


  • The Star Kepler-1278 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.099 AU ( 164351686.2 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.519 AU ( 227176980.6 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.314 AU ( 346167444.3 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 3.405 AU ( 509400558.9 km)
  • Radiation at Planetary Boundary of Kepler-1278 b : 1602458.24 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-1278)



  • Kopparapu Recent Venus for Star Kepler-1278 distance : 1.123 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-1278 distance : 1.422 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-1278 distance : 1.373 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-1278 distance : 1.505 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1278 distance : 2.496 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-1278 distance : 2.633 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-1278)



  • Original Kopparapu Recent Venus for Star Kepler-1278 distance : 1.130 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-1278 distance : 1.460 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-1278 distance : 1.495 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1278 distance : 2.541 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-1278 distance : 2.642 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-1278)



    (Position in Stellar Map of star Kepler-1278 and its Exoplanet Kepler-1278 b)



    (Zoomed position in Stellar Map of star Kepler-1278 and its Exoplanet Kepler-1278 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-1278*)
    *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