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HD 101581 b | Exoplanets | Apex Andromeda | Apex Andromeda

Planets/Exoplanets/HD 101581 b

Confirmed exoplanet · Terrestrial

HD 101581 b

Orbiting HIP 56998

Discovered in 2025 using Transit. This page reflects the latest synchronized NASA Exoplanet Archive composite record.

NASA Archive record ↗Back to catalog →

Generic terrestrial catalog artwork; not a direct image of HD 101581 b — Generic category artwork—not a direct imageApex Andromeda catalog artwork

Discovery: 2,025
Method: Transit
Radius: 0.956 R⊕
Mass: 0.827 M⊕
Orbit: 4.46569 days
Distance: 12.7781 pc

Planet profile

Orbit and physical properties

Orbital period: 4.46569 days
Semi-major axis: 0.046 AU
Eccentricity: Not reported by the NASA Exoplanet Archive
Radius: 0.956 Earth radii
Mass: 0.827 Earth masses
Mass provenance: M-R relationship
Density: 5.2 g/cm³
Equilibrium temperature: 834 K
Insolation: 80 Earth flux

Host system

Star and system properties

Host star: HIP 56998
Stars in system: 1
Known planets in system: 2
Spectral type: K4/5V
Stellar temperature: 4,675 K
Stellar radius: 0.63 R☉
Stellar mass: 0.653 M☉
Stellar metallicity: -0.343 dex
Stellar age: 6.88 Gyr
Distance: 12.7781 parsecs
Right ascension: 11h41m01.51s
Declination: -44d24m14.93s

Discovery

Detection and provenance

Discovery method: Transit
Discovery year: 2,025
Publication date: 2025-01
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 ↗

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