Imaginary Picture of SR 12 (AB) c

Display orbital revolution of SR 12 (AB) c around the hoststar SR 12 (AB)
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Exoplanet Name : SR 12 (AB) c
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 13.0000 (Mjup) 4133.1940 (Mearth)
Semi Major Axis / Orbital Distance Calculated 1083.0000 (AU) 1083.0000 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0000
Orbital Period(Observed/Estimated) 0.00 (Days Obs.) 12303890.00 (Days Est.)
Surface Gravity (G Earth) 39.9156
Star Radiation at Atmospheric Boundary: 0.0 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 5.4 (K)
Blackbody T 0.3(K) 5.0 (K)
Blackbody T 0.7(K) 4.1 (K)
Tidally Locked Blackbody T 0.1(K) 6.4 (K)
Tidally Locked Blackbody T 0.3(K) 6.0 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Imaging
Mass Detection : Spectrum
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : SR 12 (AB)
Alternate Name :
Star Distance(LY) : 407.7
Stellar Radius(Rsun) : 0.7 (Rsun Estimated)
Stellar Mass(Msun) : 1.1 (Msun Measured) 0.0 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 4600 (K)
Spectral type : K4-M2.5
UV portion[%]: 1.9
Visible portion[%]: 32.7
IR portion[%]: 65.4
Metalicity : 0.0
Absolute Magnitude: 7.8
Apparent Magnitude: 13.3
Right Ascension(RA) 246.8313
Declination (DEC) -24.6944
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors "Allen,ori.; Myers,hilip.; Dirancesco,ames; Mathieu,obert; Chen,ua; Young,rick"
Discovery Paper - Title Hubble Space Telescope/NICMOS Imaging Survey of the Ophiuchus (Lynds 1688) Cluster
Discovery Paper - Journal "The Astrophysical Journal, Volume 566, Number 2"
Discovery Paper - URL http://iopscience.iop.org/article/10.1086/338128/meta
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-id?Ident=EM%2A%20SR%2012
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/SR%2012%20C/
SR 12 (AB) c
SR 12 (AB) c

  • SR 12 (AB) c is an exoplanet orbiting the star SR 12 (AB), located about 407.7 light-years (125.0 pc) away from Solar System. Its discovery was publicly announced on 2011.
  • The host star SR 12 (AB) has apparent magnitude of 13.3, with absolute magnitude of 7.8.
  • It is 1.1 times more massive and 0.7 times bigger compared with our Sun. The surface temperature is 4600 with its spectral types of K4-M2.5
  • (Projected orbit of SR 12 (AB) c around its host star SR 12 (AB))


  • The Star SR 12 (AB) 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.307 AU ( 45903884.7 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.424 AU ( 63451164.8 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.646 AU ( 96685533.4 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.951 AU ( 142276997.9 km)
  • Radiation at Planetary Boundary of SR 12 (AB) c : 0.00 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star SR 12 (AB))



  • Kopparapu Recent Venus for Star SR 12 (AB) distance : 0.338 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star SR 12 (AB) distance : 0.427 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star SR 12 (AB) distance : 0.413 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star SR 12 (AB) distance : 0.453 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star SR 12 (AB) distance : 0.788 AU
  • Kopparapu Outer Boundary for Early Mars for Star SR 12 (AB) distance : 0.831 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star SR 12 (AB))



  • Original Kopparapu Recent Venus for Star SR 12 (AB) distance : 0.333 AU
  • Original Kopparapu Runaway Greenhouse for Star SR 12 (AB) distance : 0.441 AU
  • Original Kopparapu Moist Greenhouse for Star SR 12 (AB) distance : 0.441 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star SR 12 (AB) distance : 0.801 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star SR 12 (AB) distance : 0.833 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star SR 12 (AB))



    (Position in Stellar Map of star SR 12 (AB) and its Exoplanet SR 12 (AB) c)



    (Zoomed position in Stellar Map of star SR 12 (AB) and its Exoplanet SR 12 (AB) c (zoom level 3))

    (Synthetic Spectrum of star SR 12 (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