Imaginary Picture of HAT-P-44 b

Display orbital revolution of HAT-P-44 b around the hoststar HAT-P-44
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Exoplanet Name : HAT-P-44 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 1.2800 (Rjup) 14.3475 (Rearth)
Mass (Mjup / Me): 0.3920 (Mjup) 124.6317 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0507 (AU) 0.0507 (AU Est.)
Eccentricity : 0.0720
Orbital Period(Yrs) 0.0118
Orbital Period(Observed/Estimated) 4.30 (Days Obs.) 4.30 (Days Est.)
Surface Gravity (G Earth) 0.6054
Star Radiation at Atmospheric Boundary: 359433.2 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1092.8 (K)
Blackbody T 0.3(K) 1026.3 (K)
Blackbody T 0.7(K) 830.4 (K)
Tidally Locked Blackbody T 0.1(K) 1299.6 (K)
Tidally Locked Blackbody T 0.3(K) 1220.4 (K)
Size Class: Super-Jupiter-size
Mass Class:
Detection Type : Primary Transit
Mass Detection :
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : HAT-P-44
Alternate Name :
Star Distance(LY) : 1219.8
Stellar Radius(Rsun) : 1.0 (Rsun Measured)
Stellar Mass(Msun) : 0.9 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 8.9 (GY)
Temperature : 5295 (K)
Spectral type : K0
UV portion[%]: 5.7
Visible portion[%]: 41.4
IR portion[%]: 52.9
Metalicity : 0.3
Absolute Magnitude: 5.3
Apparent Magnitude: 13.2
Right Ascension(RA) 213.1440
Declination (DEC) 47.0147
Hubble Space Telescope Guide Star Catalog (GSC) ID 03465-00123
Discovered by
Discovery Paper - Authors "J. D. Hartman, G. _. Bakos, G. Torres, G. Kov_cs, J. A. Johnson, A. W. Howard, G. W. Marcy, D. W. Latham, A. Bieryla, L. A. Buchhave, W. Bhatti, B. B_ky, Z. Csubry, K. Penev, M. de Val-Borro, R. W. Noyes, D. A. Fischer, G. A. Esquerdo, M. Everett, T. Szklen_r, G. Zhou, D. Bayliss, A. Shporer, B. J. Fulton, R. Sanchis-Ojeda, E. Falco, J. L_z_r, I. Papp, P. S_ri "
Discovery Paper - Title "HAT-P-44b, HAT-P-45b, and HAT-P-46b: Three Transiting Hot Jupiters in Possible Multi-Planet Systems"
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HAT-P-44+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/HAT-P-44%20b/
HAT-P-44 b
HAT-P-44 b
  • HAT-P-44 b is an exoplanet orbiting the star HAT-P-44, located about 1219.8 light-years (374.0 pc) away from Solar System. Its discovery was publicly announced on 2013.
  • The host star HAT-P-44 has apparent magnitude of 13.2, with absolute magnitude of 5.3.
  • It is 0.9 times more massive and 1.0 times bigger compared with our Sun. The surface temperature is 5295 with its spectral types of K0
  • In this planetary system, the extrasolar planet HAT-P-44 b orbits around the star HAT-P-44 every 4.3 days with its orbital distance of 0.05 AU ( 7584612.0 km)
    • (Projected orbit of HAT-P-44 b around its host star HAT-P-44)


  • The Star HAT-P-44 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.595 AU ( 88955485.3 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.822 AU ( 122959727.5 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.252 AU ( 187363413.8 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.843 AU ( 275713471.2 km)
  • Radiation at Planetary Boundary of HAT-P-44 b : 359433.15 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HAT-P-44)



  • Kopparapu Recent Venus for Star HAT-P-44 distance : 0.634 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HAT-P-44 distance : 0.802 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HAT-P-44 distance : 0.775 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HAT-P-44 distance : 0.850 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HAT-P-44 distance : 1.438 AU
  • Kopparapu Outer Boundary for Early Mars for Star HAT-P-44 distance : 1.517 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HAT-P-44)



  • Original Kopparapu Recent Venus for Star HAT-P-44 distance : 0.629 AU
  • Original Kopparapu Runaway Greenhouse for Star HAT-P-44 distance : 0.826 AU
  • Original Kopparapu Moist Greenhouse for Star HAT-P-44 distance : 0.833 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HAT-P-44 distance : 1.463 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HAT-P-44 distance : 1.521 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HAT-P-44)



    (Position in Stellar Map of star HAT-P-44 and its Exoplanet HAT-P-44 b)



    (Zoomed position in Stellar Map of star HAT-P-44 and its Exoplanet HAT-P-44 b (zoom level 3))

    (Synthetic Spectrum of star HAT-P-44*)
    *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