Imaginary Picture of NN Ser (AB) c

Display orbital revolution of NN Ser (AB) c around the hoststar NN Ser (AB)
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Exoplanet Name : NN Ser (AB) c
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 6.9100 (Mjup) 2196.9516 (Mearth)
Semi Major Axis / Orbital Distance Calculated 5.3800 (AU) 5.3800 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 15.4958
Orbital Period(Observed/Estimated) 5660.00 (Days Obs.) 5670.84 (Days Est.)
Surface Gravity (G Earth) 21.2167
Star Radiation at Atmospheric Boundary: 12.7 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 84.3 (K)
Blackbody T 0.3(K) 79.2 (K)
Blackbody T 0.7(K) 64.0 (K)
Tidally Locked Blackbody T 0.1(K) 100.2 (K)
Tidally Locked Blackbody T 0.3(K) 94.1 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Pulsar
Mass Detection :
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : NN Ser (AB)
Alternate Name :
Star Distance(LY) : 1630.8
Stellar Radius(Rsun) : 0.6 (Rsun Estimated)
Stellar Mass(Msun) : 0.6 (Msun Measured) 0.6 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5500 (K)
Spectral type : WD+M
UV portion[%]: 6.9
Visible portion[%]: 43.2
IR portion[%]: 49.9
Metalicity : 0.0
Absolute Magnitude: 8.1
Apparent Magnitude: 16.6
Right Ascension(RA) 238.2339
Declination (DEC) 12.9131
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors "Klaus Beuermann, Stefan Dreizler, Frederic V. Hessman"
Discovery Paper - Title The quest for companions to post-common envelope binaries IV: The 2:1 mean-motion resonance of the planets orbiting NN Serpentis
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NN+Ser+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/NN%20Ser%20%28AB%29%20c/
NN Ser (AB) c
NN Ser (AB) c

  • NN Ser (AB) c is an exoplanet orbiting the star NN Ser (AB), located about 1630.8 light-years (500.0 pc) away from Solar System. Its discovery was publicly announced on 2010.
  • The host star NN Ser (AB) has apparent magnitude of 16.6, with absolute magnitude of 8.1.
  • It is 0.6 times more massive and 0.6 times bigger compared with our Sun. The surface temperature is 5500 with its spectral types of WD+M
  • In this planetary system, the extrasolar planet NN Ser (AB) c orbits around the star NN Ser (AB) every 5660.0 days with its orbital distance of 5.38 AU ( 804836544.4 km)
  • (Projected orbit of NN Ser (AB) c around its host star NN Ser (AB))


  • The Star NN Ser (AB) 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.375 AU ( 56156150.6 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.519 AU ( 77622475.5 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.791 AU ( 118279474.8 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.163 AU ( 174053428.7 km)
  • Radiation at Planetary Boundary of NN Ser (AB) c : 12.72 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star NN Ser (AB))



  • Kopparapu Recent Venus for Star NN Ser (AB) distance : 0.395 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star NN Ser (AB) distance : 0.501 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star NN Ser (AB) distance : 0.484 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star NN Ser (AB) distance : 0.530 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star NN Ser (AB) distance : 0.892 AU
  • Kopparapu Outer Boundary for Early Mars for Star NN Ser (AB) distance : 0.940 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star NN Ser (AB))



  • Original Kopparapu Recent Venus for Star NN Ser (AB) distance : 0.394 AU
  • Original Kopparapu Runaway Greenhouse for Star NN Ser (AB) distance : 0.515 AU
  • Original Kopparapu Moist Greenhouse for Star NN Ser (AB) distance : 0.521 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star NN Ser (AB) distance : 0.907 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star NN Ser (AB) distance : 0.943 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star NN Ser (AB))



    (Position in Stellar Map of star NN Ser (AB) and its Exoplanet NN Ser (AB) c)



    (Zoomed position in Stellar Map of star NN Ser (AB) and its Exoplanet NN Ser (AB) c (zoom level 3))

    (Synthetic Spectrum of star NN Ser (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