Imaginary Picture of HD 177830 A b

Display orbital revolution of HD 177830 A b around the hoststar HD 177830 A
/
Exoplanet Name : HD 177830 A b
Alternate Name : HD 177830 b
Status : Confirmed
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 1.4900 (Mjup) 473.7276 (Mearth)
Semi Major Axis / Orbital Distance Calculated 1.2218 (AU) 1.2218 (AU Est.)
Eccentricity : 0.0090
Orbital Period(Yrs) 1.1132
Orbital Period(Observed/Estimated) 406.60 (Days Obs.) 406.85 (Days Est.)
Surface Gravity (G Earth) 4.5749
Star Radiation at Atmospheric Boundary: 4402.2 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 363.5 (K)
Blackbody T 0.3(K) 341.4 (K)
Blackbody T 0.7(K) 276.2 (K)
Tidally Locked Blackbody T 0.1(K) 432.3 (K)
Tidally Locked Blackbody T 0.3(K) 406.0 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Radial Velocity
Mass Detection :
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : HD 177830 A
Alternate Name : HD 177830
Star Distance(LY) : 204.6
Stellar Radius(Rsun) : 3.0 (Rsun Measured)
Stellar Mass(Msun) : 1.5 (Msun Measured) 1.5 (Msun Estimated)
Star Age : 4.4 (GY)
Temperature : 4948 (K)
Spectral type : K0IV
UV portion[%]: 3.0
Visible portion[%]: 36.5
IR portion[%]: 60.5
Metalicity : 0.6
Absolute Magnitude: 3.2
Apparent Magnitude: 7.2
Right Ascension(RA) 286.3366
Declination (DEC) 25.9206
Hubble Space Telescope Guide Star Catalog (GSC) ID 02126-01196
Discovered by
Discovery Paper - Authors "Eggenberger,.; Udry,.; Chauvin,.; Beuzit,.-L.; Lagrange,.-M.; S_gransan,.; Mayor,."
Discovery Paper - Title The impact of stellar duplicity on planet occurrence and properties. I. Observational results of a VLT/NACO search for stellar companions to 130 nearby stars with and without planets
Discovery Paper - Journal "A&A 474, 273-291 (2007) DOI: 10.1051/0004-6361:20077447"
Discovery Paper - URL http://www.aanda.org/articles/aa/ps/2007/40/aa7447-07.ps.gz
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+177830+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/HD%20177830%20A%20b/
HD 177830 A b
HD 177830 A b

  • HD 177830 A b is an exoplanet orbiting the star HD 177830 A, located about 204.6 light-years (62.7 pc) away from Solar System. Its discovery was publicly announced on 1999.
  • The host star HD 177830 A has apparent magnitude of 7.2, with absolute magnitude of 3.2.
  • It is 1.5 times more massive and 3.0 times bigger compared with our Sun. The surface temperature is 4948 with its spectral types of K0IV
  • In this planetary system, the extrasolar planet HD 177830 A b orbits around the star HD 177830 A every 406.6 days with its orbital distance of 1.22 AU ( 182778678.4 km)
  • (Projected orbit of HD 177830 A b around its host star HD 177830 A)


  • The Star HD 177830 A 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.586 AU ( 237240419.2 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 2.192 AU ( 327928257.6 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 3.340 AU ( 499690094.3 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 4.915 AU ( 735315863.7 km)
  • Radiation at Planetary Boundary of HD 177830 A b : 4402.16 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 177830 A)



  • Kopparapu Recent Venus for Star HD 177830 A distance : 1.720 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 177830 A distance : 2.177 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 177830 A distance : 2.103 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 177830 A distance : 2.308 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 177830 A distance : 3.955 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 177830 A distance : 4.171 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 177830 A)



  • Original Kopparapu Recent Venus for Star HD 177830 A distance : 1.701 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 177830 A distance : 2.244 AU
  • Original Kopparapu Moist Greenhouse for Star HD 177830 A distance : 2.250 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 177830 A distance : 4.021 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 177830 A distance : 4.182 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 177830 A)



    (Position in Stellar Map of star HD 177830 A and its Exoplanet HD 177830 A b)



    (Zoomed position in Stellar Map of star HD 177830 A and its Exoplanet HD 177830 A b (zoom level 3))

    (Synthetic Spectrum of star HD 177830 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