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

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WISEP J121756.91+162640.2 A b | Exoplanets | Apex Andromeda | Apex Andromeda

Planets/Exoplanets/WISEP J121756.91+162640.2 A b

Confirmed exoplanet · Gas Giant

WISEP J121756.91+162640.2 A b

Orbiting WISEP J121756.91+162640.2 A

Discovered in 2012 using Imaging. 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 WISEP J121756.91+162640.2 A b — Generic category artwork—not a direct imageApex Andromeda catalog artwork

Discovery: 2,012
Method: Imaging
Radius: 10.468 R⊕
Mass: 6,992 M⊕
Orbit: Not reported by the NASA Exoplanet Archive
Distance: 10.1 pc

Planet profile

Orbit and physical properties

Orbital period: Not reported by the NASA Exoplanet Archive
Semi-major axis: 8 AU
Eccentricity: Not reported by the NASA Exoplanet Archive
Radius: 10.468 Earth radii
Mass: 6,992 Earth masses
Mass provenance: Mass
Density: 33.5 g/cm³
Equilibrium temperature: 450 K
Insolation: 0 Earth flux

Host system

Star and system properties

Host star: WISEP J121756.91+162640.2 A
Stars in system: 1
Known planets in system: 1
Spectral type: T8.5
Stellar temperature: 575 K
Stellar radius: 0.091 R☉
Stellar mass: 0.029 M☉
Stellar metallicity: Not reported by the NASA Exoplanet Archive
Stellar age: 6 Gyr
Distance: 10.1 parsecs
Right ascension: 12h17m56.91s
Declination: +16d26m40.2s

Discovery

Detection and provenance

Discovery method: Imaging
Discovery year: 2,012
Publication date: 2012-10
Discovery locale: Ground
Facility: W. M. Keck Observatory
Telescope: 10 m Keck II Telescope
Instrument: NIRC2 Camera
NASA Exoplanet Archive: Open composite record ↗

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