Imaginary Picture of HD 144899 Ab

Display orbital revolution of HD 144899 Ab around the hoststar HD 144899 A
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Exoplanet Name : HD 144899 Ab
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.2315 (Rjup) 2.5944 (Rearth)
Mass (Mjup / Me): 0.0640 (Mjup) 20.3480 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.2420 (AU) 0.2420 (AU Est.)
Eccentricity : 0.8210
Orbital Period(Yrs) 0.1106
Orbital Period(Observed/Estimated) 40.40 (Days Obs.) 40.37 (Days Est.)
Surface Gravity (G Earth) 3.0231
Star Radiation at Atmospheric Boundary: 80093.4 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 750.8 (K)
Blackbody T 0.3(K) 705.1 (K)
Blackbody T 0.7(K) 570.5 (K)
Tidally Locked Blackbody T 0.1(K) 892.9 (K)
Tidally Locked Blackbody T 0.3(K) 838.5 (K)
Size Class: sub-Neptune-size
Mass Class:
Detection Type : Radial Velocity
Mass Detection : Radial Velocity
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : HD 144899 A
Alternate Name :
Star Distance(LY) : 377.2
Stellar Radius(Rsun) : 1.6 (Rsun Measured)
Stellar Mass(Msun) : 1.2 (Msun Measured) 1.2 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 6126 (K)
Spectral type : F8IV
UV portion[%]: 0.3
Visible portion[%]: 1.5
IR portion[%]: 98.2
Metalicity : 0.0
Absolute Magnitude: 3.7
Apparent Magnitude: 9.0
Right Ascension(RA) 242.5727
Declination (DEC) -47.9143
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
HD 144899 Ab
HD 144899 Ab

  • HD 144899 Ab is an exoplanet orbiting the star HD 144899 A, located about 377.2 light-years (115.7 pc) away from Solar System. Its discovery was publicly announced on 2022.
  • The host star HD 144899 A has apparent magnitude of 9.0, with absolute magnitude of 3.7.
  • It is 1.2 times more massive and 1.6 times bigger compared with our Sun. The surface temperature is 6126 with its spectral types of F8IV
  • In this planetary system, the extrasolar planet HD 144899 Ab orbits around the star HD 144899 A every 40.4 days with its orbital distance of 0.24 AU ( 36202684.7 km)
  • (Projected orbit of HD 144899 Ab around its host star HD 144899 A)


  • The Star HD 144899 A 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.340 AU ( 200433036.0 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.852 AU ( 277050835.1 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.822 AU ( 422164161.5 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 4.153 AU ( 621233057.4 km)
  • Radiation at Planetary Boundary of HD 144899 Ab : 80093.35 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 144899 A)



  • Kopparapu Recent Venus for Star HD 144899 A distance : 1.360 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 144899 A distance : 1.722 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 144899 A distance : 1.663 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 144899 A distance : 1.822 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 144899 A distance : 3.015 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 144899 A distance : 3.180 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 144899 A)



  • Original Kopparapu Recent Venus for Star HD 144899 A distance : 1.371 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 144899 A distance : 1.767 AU
  • Original Kopparapu Moist Greenhouse for Star HD 144899 A distance : 1.815 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 144899 A distance : 3.069 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 144899 A distance : 3.192 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 144899 A)



    (Position in Stellar Map of star HD 144899 A and its Exoplanet HD 144899 Ab)



    (Zoomed position in Stellar Map of star HD 144899 A and its Exoplanet HD 144899 Ab (zoom level 3))

    (Synthetic Spectrum of star HD 144899 A*)
    *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