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

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BD+20 2457 b | Exoplanets | Apex Andromeda | Apex Andromeda

Planets/Exoplanets/BD+20 2457 b

Confirmed exoplanet · Gas Giant

BD+20 2457 b

Orbiting BD+20 2457

Discovered in 2009 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 BD+20 2457 b — Generic category artwork—not a direct imageApex Andromeda catalog artwork

Discovery: 2,009
Method: Radial Velocity
Radius: 12.1 R⊕
Mass: 6,807.63 M⊕
Orbit: 379.63 days
Distance: 1,539.71 pc

Planet profile

Orbit and physical properties

Orbital period: 379.63 days
Semi-major axis: 1.45 AU
Eccentricity: 0.15
Radius: 12.1 Earth radii
Mass: 6,807.63 Earth masses
Mass provenance: Msini
Density: 21.1 g/cm³
Equilibrium temperature: 1,159.67 K
Insolation: 703.4998 Earth flux

Host system

Star and system properties

Host star: BD+20 2457
Stars in system: 1
Known planets in system: 2
Spectral type: K2 II
Stellar temperature: 4,137 K
Stellar radius: 49 R☉
Stellar mass: 2.8 M☉
Stellar metallicity: -1 dex
Stellar age: Not reported by the NASA Exoplanet Archive
Distance: 1,539.71 parsecs
Right ascension: 10h16m44.83s
Declination: +19d53m28.55s

Discovery

Detection and provenance

Discovery method: Radial Velocity
Discovery year: 2,009
Publication date: 2009-12
Discovery locale: Ground
Facility: McDonald Observatory
Telescope: 9.2 m Hobby-Eberly Telescope
Instrument: High Resolution Spectrograph
NASA Exoplanet Archive: Open composite record ↗

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