Skip to content

Missions Planets Black Holes 3D Map Agencies Blog About Sign in

Menu

Missions Planets Black Holes 3D Map Agencies Blog About Sign in

Acquiring mission data

Missions Planets Black Holes 3D Map Agencies Blog About apexandromeda.com

This is an independent informational project and is not affiliated with, endorsed by, or sponsored by NASA, ESA, JAXA, Roscosmos, CNSA, ISRO, CSA, or any other space agency. Agency names, logos, and other marks are used for identification where permitted by their respective usage policies.

A passion project from the team behind Apex Rental Pro.

HD 187123 b | Exoplanets | Apex Andromeda | Apex Andromeda

Planets/Exoplanets/HD 187123 b

Confirmed exoplanet · Gas Giant

HD 187123 b

Orbiting HD 187123

Discovered in 1998 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 187123 b — Generic category artwork—not a direct imageApex Andromeda catalog artwork

Discovery: 1,998
Method: Radial Velocity
Radius: 14.2 R⊕
Mass: 166.218 M⊕
Orbit: 3.096583 days
Distance: 45.9548 pc

Planet profile

Orbit and physical properties

Orbital period: 3.096583 days
Semi-major axis: 0.0426 AU
Eccentricity: 0.0103
Radius: 14.2 Earth radii
Mass: 166.218 Earth masses
Mass provenance: Msini
Density: 0.319 g/cm³
Equilibrium temperature: 1,450.9 K
Insolation: 738.4255 Earth flux

Host system

Star and system properties

Host star: HD 187123
Stars in system: 1
Known planets in system: 2
Spectral type: G3 V
Stellar temperature: 5,790 K
Stellar radius: 1.15043 R☉
Stellar mass: 1.04 M☉
Stellar metallicity: 0.09 dex
Stellar age: 7.4 Gyr
Distance: 45.9548 parsecs
Right ascension: 19h46m58.29s
Declination: +34d25m08.36s

Discovery

Detection and provenance

Discovery method: Radial Velocity
Discovery year: 1,998
Publication date: 1998-12
Discovery locale: Ground
Facility: W. M. Keck Observatory
Telescope: 10 m Keck I Telescope
Instrument: HIRES Spectrometer
NASA Exoplanet Archive: Open composite record ↗

Community discussion

Comments 0

No comments yet. The airlock is open.

Sign in or create an account to comment and vote.