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Kepler-257 b | Exoplanets | Apex Andromeda | Apex Andromeda

Planets/Exoplanets/Kepler-257 b

Confirmed exoplanet · Neptune Like

Kepler-257 b

Orbiting Kepler-257

Discovered in 2014 using Transit. This page reflects the latest synchronized NASA Exoplanet Archive composite record.

NASA Archive record ↗Back to catalog →

Generic neptune like catalog artwork; not a direct image of Kepler-257 b — Generic category artwork—not a direct imageApex Andromeda catalog artwork

Discovery: 2,014
Method: Transit
Radius: 2.61 R⊕
Mass: 7.32 M⊕
Orbit: 2.382667 days
Distance: 780.256 pc

Planet profile

Orbit and physical properties

Orbital period: 2.382667 days
Semi-major axis: 0.034 AU
Eccentricity: 0
Radius: 2.61 Earth radii
Mass: 7.32 Earth masses
Mass provenance: M-R relationship
Density: 2.26 g/cm³
Equilibrium temperature: 1,237 K
Insolation: 343.6 Earth flux

Host system

Star and system properties

Host star: Kepler-257
Stars in system: 1
Known planets in system: 3
Spectral type: Not reported by the NASA Exoplanet Archive
Stellar temperature: 5,180 K
Stellar radius: 1.037 R☉
Stellar mass: 0.916 M☉
Stellar metallicity: 0.4 dex
Stellar age: 1.48 Gyr
Distance: 780.256 parsecs
Right ascension: 19h49m15.84s
Declination: +46d01m23.75s

Discovery

Detection and provenance

Discovery method: Transit
Discovery year: 2,014
Publication date: 2014-03
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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