HAT-P-4 b

HAT-P-4 b Image

Description: HAT-P-4b is a confirmed extrasolar planet orbiting the star HAT-P-4 over 1000 light years away in Boötes constellation. It was discovered by transit on October 2, 2007, which looks for slight dimming of stars caused by planets that passed in front of them. It is the fourth planet discovered by the HATNet Project. It is also called BD+36 2593b, TYC 2569-01599-1b, 2MASS J15195792+3613467b, SAO 64638b.

Physical Properties

Mass (Jupiter mass): 0.671 MJ

Radius (Jupiter radius): 1.274 RJ

Density: 0.403 g/cm³

Equilibrium Temperature: 1686.0 K

Orbital Parameters

Orbital Period: 3.056536 days

Semi-major Axis: 0.04438 AU

Eccentricity: Unknown

Inclination: 89.91°

Host Star Properties

Host Star: HAT-P-4

Spectral Type: F

Temperature: 5860.0 K

Stellar Mass: 0.56 M☉

Stellar Radius: 1.62 R☉

Discovery Information

Planet Letter: b

Object ID: 3.11024

Host ID: 2.103414

Discovery Date: 2007-11

Discovery Year: 2007

Discovery Method: Transit

Discovery Locale: Ground

Discovery Facility: HATNet

Discovery Instrument: 2K CCD Sensor

Back to List