HAT-P-5b

HAT-P-5 b is a transiting extrasolar planet located approximately 1000 light-years away in the constellation of Lyra, orbiting the star HAT-P-5. It is a hot Jupiter with a mass 6% greater than Jupiter and a radius 26% greater than Jupiter, corresponding to a density of 0.66 g/cm₃, which is less than water. This planet was found by Bakos et al. on October 9, 2007.^[3]

HAT-P-5 b / Kráľomoc

Size comparison of HAT-P-5 b with Jupiter.
Discovery
Discovered by	Bakos et al.
Discovery date	October 9, 2007
Detection method	transit
Orbital characteristics
Semi-major axis	0.04075 ± 0.00076 AU (6,096,000 ± 114,000 km)
Eccentricity	0
Orbital period (sidereal)	2.788491 ± 2.5e-5 d
Inclination	86.75 ± 0.44
Star	HAT-P-5
Physical characteristics
Mean radius	1.204±0.017 RJ[1]
Mass	0.989±0.053 MJ[1]
Mean density	0.66 ± 0.11 g/cm3
Temperature	1485+109 −118[2]

The planet HAT-P-5 b is named Kráľomoc. The name was selected in the NameExoWorlds campaign by Slovakia, during the 100th anniversary of the IAU. Kráľomoc is an ancient Slovak term for the planet Jupiter.^[4][5]

Physical properties

The measured temperature on the planetary dayside is 1485⁺¹⁰⁹
₋₁₁₈ K.^[2]

See also

• HAT-P-4b
• HAT-P-6b