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KELT-9 b | Exoplanets | Apex Andromeda | Apex Andromeda

Planets/Exoplanets/KELT-9 b

Confirmed exoplanet · Gas Giant

KELT-9 b

Orbiting KELT-9

Discovered in 2017 using Transit. 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 KELT-9 b — Generic category artwork—not a direct imageApex Andromeda catalog artwork

Discovery: 2,017
Method: Transit
Radius: 21.700587 R⊕
Mass: 915.345812 M⊕
Orbit: 1.481124 days
Distance: 204.455 pc

Planet profile

Orbit and physical properties

Orbital period: 1.481124 days
Semi-major axis: 0.03368 AU
Eccentricity: 0
Radius: 21.700587 Earth radii
Mass: 915.345812 Earth masses
Mass provenance: Mass
Density: 0.491 g/cm³
Equilibrium temperature: 3,921 K
Insolation: 44,900 Earth flux

Host system

Star and system properties

Host star: KELT-9
Stars in system: 2
Known planets in system: 1
Spectral type: A
Stellar temperature: 9,270 K
Stellar radius: 2.418 R☉
Stellar mass: 2.32 M☉
Stellar metallicity: 0.07 dex
Stellar age: 0.45 Gyr
Distance: 204.455 parsecs
Right ascension: 20h31m26.38s
Declination: +39d56m20.10s

Discovery

Detection and provenance

Discovery method: Transit
Discovery year: 2,017
Publication date: 2017-06
Discovery locale: Ground
Facility: KELT-North
Telescope: Mamiya 645 80mm f/1.9
Instrument: Apogee 4K CCD Sensor
NASA Exoplanet Archive: Open composite record ↗

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