TWA 5 A (AB)

Display orbital revolution around the star TWA 5 A (AB)
Imaginary Picture of Star TWA 5 A (AB)
Star Name : TWA 5 A (AB)
Alternate Name :
Star Distance (LY/pc): 157.6394 (LY) 48.3325 (pc)
Stellar Radius (Rsun): 0.0000 (Rsun, measured) 0.3994 (Rsun, estimated)
Stellar Mass (Msun): 0.4000 (Msun/observed) 0.4000 (Msun/estimated)
Spectral type : M1.5
Metalicity : 0.0000
Absolute Magnitude : 8.70
Apparent Magnitude : 12.12
Right Ascension(RA) : 172.98024
Declination(DEC) : -34.60750
  • This is the TWA 5 A (AB) . The star TWA 5 A (AB) islocated about 157.6 light-years (48.3 pc) away from our Solar System.
  • The star TWA 5 A (AB) has apparent magnitude of 12.1, with absolute magnitude of 8.7.
  • It is 0.4 times more massive and 0.4 times bigger compared with our Sun. The surface temperature is 3700 with its spectral types of M1.5
  • Number of Extrasolar Planets : 1
  • Name of the 1 Planet TWA 5 A (AB) b radius 0.907830 mass 25.000000 orbital distance 86.000000
    (Illustration of the TWA 5 A (AB)'s Planetary System)



    The Star TWA 5 A (AB) 's habitable zone is located at the following distance

    Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.118 AU ( 17719607.7 km)
    Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.164 AU ( 24493128.5 km)
    Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.249 AU ( 37322107.6 km)
    Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.367 AU ( 54921116.3 km)
    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star TWA 5 A (AB))



    Kopparapu's Recent Venus for Star TWA 5 A (AB) distance : 0.191 AU
    Kopparapu's Runaway Greenhouse for Earth-sized planet for Star TWA 5 A (AB) distance : 0.242 AU
    Kopparapu's Runaway Greenhouse for Super-Earth-sized planet for Star TWA 5 A (AB) distance : 0.234 AU
    Kopparapu's Runaway Greenhouse for Mars-sized planet for Star TWA 5 A (AB) distance : 0.256 AU
    Kopparapu's Outer Boundary for Maximum Greenhouse for Star TWA 5 A (AB) distance : 0.466 AU
    Kopparapu's Outer Boundary for Early Mars for Star TWA 5 A (AB) distance : 0.492 AU
    (Habitable zone calculated based on Kopparapu et al.(2013) around the star TWA 5 A (AB))



  • Original Kopparapu Recent Venus for Star TWA 5 A (AB) distance : 0.189 AU
  • Original Kopparapu Runaway Greenhouse for Star TWA 5 A (AB) distance : 0.250 AU
  • Original Kopparapu Moist Greenhouse for Star TWA 5 A (AB) distance : 0.250 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star TWA 5 A (AB) distance : 0.473 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star TWA 5 A (AB) distance : 0.492 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star TWA 5 A (AB))



    (Position in Stellar Map of star TWA 5 A (AB) )



    (Zoomed position in Stellar Map of star TWA 5 A (AB) (zoom level 3))

    (Synthetic Spectrum of star K2-138*)
    *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