HIP 99770 b

HIP 99770 b Image

Description: HIP 99770 b is a directly imaged superjovian extrasolar planet orbiting the dusty A-type star HIP 99770, detected with Gaia/Hipparcos precision astrometry and high-contrast imaging. HIP 99770 b is the first joint direct imaging + astrometric discovery of an extrasolar planet and the first planet discovered using precision astrometry from the Gaia mission.

Physical Properties

Mass (Jupiter mass): 16.1 MJ

Radius (Jupiter radius): 1.09 RJ

Density: 15.5 g/cm³

Equilibrium Temperature: Unknown

Orbital Parameters

Orbital Period: 18600.0 days

Semi-major Axis: 16.9 AU

Eccentricity: 0.25

Inclination: 148.0°

Host Star Properties

Host Star: HIP 99770

Spectral Type: A5-A6

Temperature: 8000.0 K

Stellar Mass: 1.85 M☉

Stellar Radius: 1.94 R☉

Discovery Information

Planet Letter: b

Object ID: 3.18982

Host ID: 2.57866

Discovery Date: 2022-11

Discovery Year: 2023

Discovery Method: Imaging

Discovery Locale: Multiple Locales

Discovery Facility: Multiple Observatories

Discovery Instrument: Multiple Instruments

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