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HD 178911 B b | Exoplanets | Apex Andromeda | Apex Andromeda

Planets/Exoplanets/HD 178911 B b

Confirmed exoplanet · Gas Giant

HD 178911 B b

Orbiting HD 178911 B

Discovered in 2001 using Radial Velocity. This page reflects the latest synchronized NASA Exoplanet Archive composite record.

NASA Archive record ↗Back to catalog →

Generic gas giant catalog artwork; not a direct image of HD 178911 B b — Generic category artwork—not a direct imageApex Andromeda catalog artwork

Discovery: 2,001
Method: Radial Velocity
Radius: 12.6 R⊕
Mass: 2,552.1749 M⊕
Orbit: 71.484 days
Distance: 40.9727 pc

Planet profile

Orbit and physical properties

Orbital period: 71.484 days
Semi-major axis: 0.34 AU
Eccentricity: 0.11
Radius: 12.6 Earth radii
Mass: 2,552.1749 Earth masses
Mass provenance: Msini
Density: 7.01 g/cm³
Equilibrium temperature: 480.24 K
Insolation: 7.8319 Earth flux

Host system

Star and system properties

Host star: HD 178911 B
Stars in system: 3
Known planets in system: 1
Spectral type: G5
Stellar temperature: 5,588 K
Stellar radius: 1.08 R☉
Stellar mass: 1.24 M☉
Stellar metallicity: 0.24 dex
Stellar age: Not reported by the NASA Exoplanet Archive
Distance: 40.9727 parsecs
Right ascension: 19h09m03.17s
Declination: +34d36m02.51s

Discovery

Detection and provenance

Discovery method: Radial Velocity
Discovery year: 2,001
Publication date: 2002-03
Discovery locale: Ground
Facility: W. M. Keck Observatory
Telescope: 10 m Keck I Telescope
Instrument: HIRES Spectrometer
NASA Exoplanet Archive: Open composite record ↗

Visual archive

Gallery

One image from HD 178911 B b.

Generic gas giant catalog artwork; not a direct image of HD 178911 B b — Apex Andromeda catalog artwork