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Ross 128 b | Exoplanets | Apex Andromeda | Apex Andromeda

Planets/Exoplanets/Ross 128 b

Confirmed exoplanet · Terrestrial

Ross 128 b

Orbiting Ross 128

Discovered in 2017 using Radial Velocity. 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 Ross 128 b — Generic category artwork—not a direct imageApex Andromeda catalog artwork

Discovery: 2,017
Method: Radial Velocity
Radius: 1.11 R⊕
Mass: 1.4 M⊕
Orbit: 9.8658 days
Distance: 3.37454 pc

Planet profile

Orbit and physical properties

Orbital period: 9.8658 days
Semi-major axis: 0.0496 AU
Eccentricity: 0.116
Radius: 1.11 Earth radii
Mass: 1.4 Earth masses
Mass provenance: Msini
Density: 5.63 g/cm³
Equilibrium temperature: 301 K
Insolation: 1.38 Earth flux

Host system

Star and system properties

Host star: Ross 128
Stars in system: 1
Known planets in system: 1
Spectral type: M4
Stellar temperature: 3,192 K
Stellar radius: 0.1967 R☉
Stellar mass: 0.168 M☉
Stellar metallicity: -0.02 dex
Stellar age: 5 Gyr
Distance: 3.37454 parsecs
Right ascension: 11h47m45.02s
Declination: +00d47m57.44s

Discovery

Detection and provenance

Discovery method: Radial Velocity
Discovery year: 2,017
Publication date: 2018-05
Discovery locale: Ground
Facility: La Silla Observatory
Telescope: 3.6 m ESO Telescope
Instrument: HARPS Spectrograph
NASA Exoplanet Archive: Open composite record ↗

Visual archive

Gallery

One image from Ross 128 b.

Generic terrestrial catalog artwork; not a direct image of Ross 128 b — Apex Andromeda catalog artwork