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HD 21520 b | Exoplanets | Apex Andromeda | Apex Andromeda

Planets/Exoplanets/HD 21520 b

Confirmed exoplanet · Neptune Like

HD 21520 b

Orbiting HD 21520

Discovered in 2024 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 HD 21520 b — Generic category artwork—not a direct imageApex Andromeda catalog artwork

Discovery: 2,024
Method: Transit
Radius: 2.697 R⊕
Mass: 17.7 M⊕
Orbit: 25.1292 days
Distance: 79.208 pc

Planet profile

Orbit and physical properties

Orbital period: 25.1292 days
Semi-major axis: 0.1726 AU
Eccentricity: 0
Radius: 2.697 Earth radii
Mass: 17.7 Earth masses
Mass provenance: Mass
Density: 1.35 g/cm³
Equilibrium temperature: 637 K
Insolation: 25.7431 Earth flux

Host system

Star and system properties

Host star: HD 21520
Stars in system: 1
Known planets in system: 1
Spectral type: Not reported by the NASA Exoplanet Archive
Stellar temperature: 5,871 K
Stellar radius: 1.044 R☉
Stellar mass: 1.09 M☉
Stellar metallicity: 0.049 dex
Stellar age: 5.3 Gyr
Distance: 79.208 parsecs
Right ascension: 03h26m33.68s
Declination: -43d36m49.19s

Discovery

Detection and provenance

Discovery method: Transit
Discovery year: 2,024
Publication date: 2024-11
Discovery locale: Space
Facility: Transiting Exoplanet Survey Satellite (TESS)
Telescope: 0.1 m TESS Telescope
Instrument: TESS CCD Array
NASA Exoplanet Archive: Open composite record ↗

Visual archive

Gallery

One image from HD 21520 b.

Generic neptune like catalog artwork; not a direct image of HD 21520 b — Apex Andromeda catalog artwork