Imaginary Picture of Kepler-1281 b

Display orbital revolution of Kepler-1281 b around the hoststar Kepler-1281
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Exoplanet Name : Kepler-1281 b
Alternate Name : "2MASS J19412506+4830554 b, K02580.01, KIC 11037511 b, KOI-2580 b, KOI-2580.01, WISE J194125.05+483055.2 b"
Status : Confirmed
Radius (Rjup / Re): 0.1460 (Rjup) 1.6365 (Rearth)
Mass (Mjup / Me): 0.0131 (Mjup) 4.1712 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.0399 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0085
Orbital Period(Observed/Estimated) 3.12 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 1.5575
Star Radiation at Atmospheric Boundary: 557868.7 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1219.8 (K)
Blackbody T 0.3(K) 1145.5 (K)
Blackbody T 0.7(K) 926.8 (K)
Tidally Locked Blackbody T 0.1(K) 1450.6 (K)
Tidally Locked Blackbody T 0.3(K) 1362.2 (K)
Size Class: super-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-1281
Alternate Name : "2MASS J19412506+4830554, KIC 11037511, KOI-2580, WISE J194125.05+483055.2"
Star Distance(LY) : 3139.8
Stellar Radius(Rsun) : 0.9 (Rsun Measured)
Stellar Mass(Msun) : 0.9 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 4.4 (GY)
Temperature : 5591 (K)
Spectral type : G7
UV portion[%]: 6.1
Visible portion[%]: 42.0
IR portion[%]: 51.9
Metalicity : -0.0
Absolute Magnitude: 4.6
Apparent Magnitude: 14.5
Right Ascension(RA) 295.3545
Declination (DEC) 48.5154
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. Batalha7"
Discovery Paper - Title FALSE POSITIVE PROBABILITIES FOR ALL KEPLER OBJECTS OF INTEREST: 1284 NEWLY VALIDATED PLANETS AND 441 LIKELY FALSE POSITIVES
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Kepler-1281+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-1281%20b/
Kepler-1281 b
Kepler-1281 b

  • Kepler-1281 b is an exoplanet orbiting the star Kepler-1281, located about 3139.8 light-years (962.7 pc) away from Solar System. Its discovery was publicly announced on 2016.
  • The host star Kepler-1281 has apparent magnitude of 14.5, with absolute magnitude of 4.6.
  • It is 0.9 times more massive and 0.9 times bigger compared with our Sun. The surface temperature is 5591 with its spectral types of G7
  • In this planetary system, the extrasolar planet Kepler-1281 b orbits around the star Kepler-1281 every 3.1 days with its orbital distance of 0.04 AU ( 5962648.9 km)
  • (Projected orbit of Kepler-1281 b around its host star Kepler-1281)


  • The Star Kepler-1281 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.582 AU ( 87123547.0 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.805 AU ( 120427510.1 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.227 AU ( 183504874.8 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.805 AU ( 270035462.1 km)
  • Radiation at Planetary Boundary of Kepler-1281 b : 557868.74 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-1281)



  • Kopparapu Recent Venus for Star Kepler-1281 distance : 0.610 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-1281 distance : 0.773 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-1281 distance : 0.746 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-1281 distance : 0.819 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1281 distance : 1.372 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-1281 distance : 1.447 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-1281)



  • Original Kopparapu Recent Venus for Star Kepler-1281 distance : 0.609 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-1281 distance : 0.795 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-1281 distance : 0.806 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1281 distance : 1.396 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-1281 distance : 1.452 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-1281)



    (Position in Stellar Map of star Kepler-1281 and its Exoplanet Kepler-1281 b)



    (Zoomed position in Stellar Map of star Kepler-1281 and its Exoplanet Kepler-1281 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-1281*)
    *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