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.

51 Peg b | Exoplanets | Apex Andromeda | Apex Andromeda

Planets/Exoplanets/51 Peg b

Confirmed exoplanet · Gas Giant

51 Peg b

Orbiting 51 Peg

Discovered in 1995 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 51 Peg b — Generic category artwork—not a direct imageApex Andromeda catalog artwork

Discovery: 1,995
Method: Radial Velocity
Radius: 14.1 R⊕
Mass: 193.875328 M⊕
Orbit: 4.230797 days
Distance: 15.4614 pc

Planet profile

Orbit and physical properties

Orbital period: 4.230797 days
Semi-major axis: 0.052 AU
Eccentricity: 0.0063
Radius: 14.1 Earth radii
Mass: 193.875328 Earth masses
Mass provenance: Mass
Density: 0.38 g/cm³
Equilibrium temperature: 1,328.93 K
Insolation: 506.1775 Earth flux

Host system

Star and system properties

Host star: 51 Peg
Stars in system: 1
Known planets in system: 1
Spectral type: G5V
Stellar temperature: 5,761 K
Stellar radius: 1.19 R☉
Stellar mass: 1.07 M☉
Stellar metallicity: 0.2058 dex
Stellar age: 10 Gyr
Distance: 15.4614 parsecs
Right ascension: 22h57m28.21s
Declination: +20d46m08.74s

Discovery

Detection and provenance

Discovery method: Radial Velocity
Discovery year: 1,995
Publication date: 1995-11
Discovery locale: Ground
Facility: Haute-Provence Observatory
Telescope: 1.93 m Telescope
Instrument: ELODIE Spectrograph
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.