Imaginary Picture of Kepler-1661 (AB) b

Display orbital revolution of Kepler-1661 (AB) b around the hoststar Kepler-1661 (AB)
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Exoplanet Name : Kepler-1661 (AB) b
Alternate Name : KOI-3152 b
Status : Confirmed
Radius (Rjup / Re): 0.2216 (Rjup) 2.4843 (Rearth)
Mass (Mjup / Me): 0.0530 (Mjup) 16.8507 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.6322 (AU Est.)
Eccentricity : 0.0600
Orbital Period(Yrs) 0.4793
Orbital Period(Observed/Estimated) 175.06 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 2.7304
Star Radiation at Atmospheric Boundary: 414.7 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 201.4 (K)
Blackbody T 0.3(K) 189.1 (K)
Blackbody T 0.7(K) 153.0 (K)
Tidally Locked Blackbody T 0.1(K) 239.5 (K)
Tidally Locked Blackbody T 0.3(K) 224.9 (K)
Size Class: sub-Neptune-size
Mass Class:
Detection Type : Primary Transit
Mass Detection : Theoretical
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : Kepler-1661 (AB)
Alternate Name : KOI-3152
Star Distance(LY) : 1355.2
Stellar Radius(Rsun) : 1.1 (Rsun Estimated)
Stellar Mass(Msun) : 1.1 (Msun Measured) 1.1 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 3300 (K)
Spectral type : M9
UV portion[%]: 0.2
Visible portion[%]: 11.2
IR portion[%]: 88.6
Metalicity : 0.0
Absolute Magnitude: 5.9
Apparent Magnitude: 14.0
Right Ascension(RA) 285.1667
Declination (DEC) 41.9669
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal
Discovery Paper - URL
SIMBAD LINK
Open Exoplanet Database Link
Kepler-1661 (AB) b
Kepler-1661 (AB) b

  • Kepler-1661 (AB) b is an exoplanet orbiting the star Kepler-1661 (AB), located about 1355.2 light-years (415.5 pc) away from Solar System. Its discovery was publicly announced on 2019.
  • The host star Kepler-1661 (AB) has apparent magnitude of 14.0, with absolute magnitude of 5.9.
  • It is 1.1 times more massive and 1.1 times bigger compared with our Sun. The surface temperature is 3300 with its spectral types of M9
  • In this planetary system, the extrasolar planet Kepler-1661 (AB) b orbits around the star Kepler-1661 (AB) every 175.1 days with its orbital distance of 0.63 AU ( 94577415.1 km)
  • (Projected orbit of Kepler-1661 (AB) b around its host star Kepler-1661 (AB))


  • The Star Kepler-1661 (AB) 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.252 AU ( 37676955.0 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.348 AU ( 52079398.0 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.530 AU ( 79357477.3 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.781 AU ( 116778004.3 km)
  • Radiation at Planetary Boundary of Kepler-1661 (AB) b : 414.68 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-1661 (AB))



  • Kopparapu Recent Venus for Star Kepler-1661 (AB) distance : 0.285 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-1661 (AB) distance : 0.361 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-1661 (AB) distance : 0.348 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-1661 (AB) distance : 0.383 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1661 (AB) distance : 0.709 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-1661 (AB) distance : 0.748 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-1661 (AB))



  • Original Kopparapu Recent Venus for Star Kepler-1661 (AB) distance : 0.283 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-1661 (AB) distance : 0.374 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-1661 (AB) distance : 0.375 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1661 (AB) distance : 0.720 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-1661 (AB) distance : 0.749 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-1661 (AB))



    (Position in Stellar Map of star Kepler-1661 (AB) and its Exoplanet Kepler-1661 (AB) b)



    (Zoomed position in Stellar Map of star Kepler-1661 (AB) and its Exoplanet Kepler-1661 (AB) b (zoom level 3))

    (Synthetic Spectrum of star Kepler-1661 (AB)*)
    *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