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

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KOI-1257 b | Exoplanets | Apex Andromeda | Apex Andromeda

Planets/Exoplanets/KOI-1257 b

Confirmed exoplanet · Gas Giant

KOI-1257 b

Orbiting KOI-1257

Discovered in 2014 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 KOI-1257 b — Generic category artwork—not a direct imageApex Andromeda catalog artwork

Discovery: 2,014
Method: Transit
Radius: 10.54 R⊕
Mass: 460.83 M⊕
Orbit: 86.647661 days
Distance: 656 pc

Planet profile

Orbit and physical properties

Orbital period: 86.647661 days
Semi-major axis: 0.382 AU
Eccentricity: 0.772
Radius: 10.54 Earth radii
Mass: 460.83 Earth masses
Mass provenance: Mass
Density: 2.1 g/cm³
Equilibrium temperature: 511 K
Insolation: 7.28 Earth flux

Host system

Star and system properties

Host star: KOI-1257
Stars in system: 2
Known planets in system: 1
Spectral type: G5 V
Stellar temperature: 5,520 K
Stellar radius: 1.13 R☉
Stellar mass: 0.99 M☉
Stellar metallicity: 0.27 dex
Stellar age: 9.3 Gyr
Distance: 656 parsecs
Right ascension: 19h24m54.02s
Declination: +44d55m38.25s

Discovery

Detection and provenance

Discovery method: Transit
Discovery year: 2,014
Publication date: 2014-06
Discovery locale: Space
Facility: Kepler
Telescope: 0.95 m Kepler Telescope
Instrument: Kepler CCD Array
NASA Exoplanet Archive: Open composite record ↗

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