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Stella con 4 pianeti noti

GJ 876

Apri in Ouranos

GJ 876, una stella M2.5V, ha 4 pianeti confermati.

Misurato

Distanza: circa 15.2 anni luce
Tipo spettrale della stella: M2.5V
Pianeti confermati: 4

Distanza dal Sole

Informazioni 15.2 anni luce. Per attraversarlo:

Luce15.2 anni
Velocità della Voyager 1270,000 anni
In movimento a 100 km/h164 milioni di anni

Voyager 1 alla velocità con cui si è allontanata nell'anno fino al 2026-10-25 (JPL Horizons). In auto: senza sosta, senza mai fare rifornimento.

Dati

GJ 876 c ha una temperatura di equilibrio compresa tra −50 e +50 °C.

Come è stato scoperto

Primo pianeta scoperto nel 1998 con la velocità radiale (NASA Exoplanet Archive).

I suoi pianeti

GJ 876 b — 13 times Earth's width (estimated from its mass, not measured), a giant, Jupiter-sized or more; its year lasts 61 days; about −82 °C, below freezing; found in 1998 by radial velocity.
GJ 876 e — 3.9 times Earth's width (estimated from its mass, not measured), a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 120 days; about −120 °C, below freezing; found in 2010 by radial velocity.
GJ 876 c — 14 times Earth's width (estimated from its mass, not measured), a giant, Jupiter-sized or more; its year lasts 30 days; about −31 °C, below freezing; found in 2000 by radial velocity.
GJ 876 d — 2.5 times Earth's width (estimated from its mass, not measured), a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 47 hours; about 330 °C, hotter than boiling water; found in 2005 by radial velocity.

The NASA Exoplanet Archive's page

Da dove proviene

NASA Exoplanet Archive, Planetary Systems Composite Parameters (fetched 2026-11-02). Composite values: where a planet's size or mass was not measured, the archive estimates it from the other.
This research has made use of the NASA Exoplanet Archive, which is operated by the California Institute of Technology, under contract with NASA under the Exoplanet Exploration Program.

Ogni catalogo utilizzato da Ouranos è citato nella pagina dei crediti.

I suoi pianeti

GJ 876 b — 13 times Earth's width (estimated from its mass, not measured), a giant, Jupiter-sized or more; its year lasts 61 days; about −82 °C, below freezing; found in 1998 by radial velocity.

GJ 876 e — 3.9 times Earth's width (estimated from its mass, not measured), a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 120 days; about −120 °C, below freezing; found in 2010 by radial velocity.

GJ 876 c — 14 times Earth's width (estimated from its mass, not measured), a giant, Jupiter-sized or more; its year lasts 30 days; about −31 °C, below freezing; found in 2000 by radial velocity.

GJ 876 d — 2.5 times Earth's width (estimated from its mass, not measured), a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 47 hours; about 330 °C, hotter than boiling water; found in 2005 by radial velocity.

Da dove proviene

NASA Exoplanet Archive, Planetary Systems Composite Parameters (fetched 2026-11-02). Composite values: where a planet's size or mass was not measured, the archive estimates it from the other.

This research has made use of the NASA Exoplanet Archive, which is operated by the California Institute of Technology, under contract with NASA under the Exoplanet Exploration Program.