Imaginary Picture of COCONUTS-2 b

Display orbital revolution of COCONUTS-2 b around the hoststar COCONUTS-2A
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Exoplanet Name : COCONUTS-2 b
Alternate Name : WISEPA J075108.79-763449.6 b
Status : Confirmed
Radius (Rjup / Re): 1.1200 (Rjup) 12.5541 (Rearth)
Mass (Mjup / Me): 6.4000 (Mjup) 2034.8032 (Mearth)
Semi Major Axis / Orbital Distance Calculated 6471.0000 (AU) 6471.0000 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0000
Orbital Period(Observed/Estimated) 0.00 (Days Obs.) 312569402.31 (Days Est.)
Surface Gravity (G Earth) 12.9108
Star Radiation at Atmospheric Boundary: 0.0 (W/m2)
Measured Temperature (K) 433.0 (K)
Blackbody T 0.1(K) 1.2 (K)
Blackbody T 0.3(K) 1.2 (K)
Blackbody T 0.7(K) 0.9 (K)
Tidally Locked Blackbody T 0.1(K) 1.5 (K)
Tidally Locked Blackbody T 0.3(K) 1.4 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Imaging
Mass Detection : Spectrum
Radius Detection : Flux
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : COCONUTS-2A
Alternate Name : WISEPA J075108.79-763449.6
Star Distance(LY) : 35.5
Stellar Radius(Rsun) : 0.4 (Rsun Measured)
Stellar Mass(Msun) : 0.4 (Msun Measured) 0.0 (Msun Estimated)
Star Age : 0.5 (GY)
Temperature : 3406 (K)
Spectral type : M3
UV portion[%]: 0.3
Visible portion[%]: 12.1
IR portion[%]: 87.6
Metalicity : 0.0
Absolute Magnitude: 11.1
Apparent Magnitude: 11.3
Right Ascension(RA) 117.3042
Declination (DEC) -76.7019
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal
Discovery Paper - URL
SIMBAD LINK https://simbad.u-strasbg.fr/simbad/sim-basic?Ident=COCONUTS-2A&submit=SIMBAD+search
Open Exoplanet Database Link
COCONUTS-2 b
COCONUTS-2 b

  • COCONUTS-2 b is an exoplanet orbiting the star COCONUTS-2A, located about 35.5 light-years (10.9 pc) away from Solar System. Its discovery was publicly announced on 2021.
  • The host star COCONUTS-2A has apparent magnitude of 11.3, with absolute magnitude of 11.1.
  • It is 0.4 times more massive and 0.4 times bigger compared with our Sun. The surface temperature is 3406 with its spectral types of M3
  • (Projected orbit of COCONUTS-2 b around its host star COCONUTS-2A)


  • The Star COCONUTS-2A 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.098 AU ( 14587441.4 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.135 AU ( 20163656.2 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.205 AU ( 30724949.9 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.302 AU ( 45213109.7 km)
  • Radiation at Planetary Boundary of COCONUTS-2 b : 0.00 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star COCONUTS-2A)



  • Kopparapu Recent Venus for Star COCONUTS-2A distance : 0.110 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star COCONUTS-2A distance : 0.140 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star COCONUTS-2A distance : 0.135 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star COCONUTS-2A distance : 0.148 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star COCONUTS-2A distance : 0.273 AU
  • Kopparapu Outer Boundary for Early Mars for Star COCONUTS-2A distance : 0.288 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star COCONUTS-2A)



  • Original Kopparapu Recent Venus for Star COCONUTS-2A distance : 0.109 AU
  • Original Kopparapu Runaway Greenhouse for Star COCONUTS-2A distance : 0.145 AU
  • Original Kopparapu Moist Greenhouse for Star COCONUTS-2A distance : 0.145 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star COCONUTS-2A distance : 0.277 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star COCONUTS-2A distance : 0.288 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star COCONUTS-2A)



    (Position in Stellar Map of star COCONUTS-2A and its Exoplanet COCONUTS-2 b)



    (Zoomed position in Stellar Map of star COCONUTS-2A and its Exoplanet COCONUTS-2 b (zoom level 3))

    (Synthetic Spectrum of star COCONUTS-2A*)
    *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