HAT-P-9 b
Orbiting HAT-P-9
HAT-P-9 b is an exoplanet orbiting the star HAT-P-9, discovered in 2008 using the Transit method. It is a Jupiter-sized world.
Radius
15.61
Earth radii
Mass
238.05
Earth masses
Orbital Period
3.9
days
Distance
455.2
parsecs
Equilibrium Temp
1540
K
Radius (Earth radii)
15.61
Mass (Earth masses)
238.05
Measured
Equilibrium Temperature
1540 K
Parameter source: Wang et al. 2019
Orbital Period
3.923+0.000−0.000days
Semi-Major Axis
0.0529+0.0008−0.0008au
Planet Mass (Earth masses)
238.05+20.34−20.02
Planet Mass (Jupiter masses)
0.7490+0.0640−0.0630
Eccentricity
0.0840+0.0520−0.0470
Epoch of Periastron
2457811.72+0.47−0.37days(BJD-TDB)
Argument of Periastron
152.0+42.0−39.0deg
Radial Velocity Semi-Amplitude
82.10+6.50−6.40m/s
Distance from Earth
455.2 pc (~1485 ly)
Spectral Type
Unknown
Temperature
6350 K
Mass (Solar)
1.28 M☉
Radius (Solar)
1.34 R☉
Luminosity
0.42 log L☉
Planets in System
1
Stars in System
1
Coordinates (RA, Dec)
110.1685°, 37.1406°
Discovery Method
Transit
Discovery Year
2008
Source ID: HAT-P-9 b
HAT-P-9 b orbits HAT-P-9 and was reported in 2008 and was detected with the Transit method.
Published measurements list a radius of 15.61 Earth radii, a mass of 238.05 Earth masses, an orbital period of 3.92 days, and an equilibrium temperature near 1,540 K.
Catalog data places the system at about 455.2 parsecs from Earth and 1 known planet in the system.
Host star
Explore the stellar record for this system to compare temperature, spectral type, and known planets.
Open HAT-P-9