Tradotto dall'IA (Opus 5.5) dalla scheda inglese. Numeri, nomi e fonti sono invariati.

Stella con 5 pianeti noti

55 Cnc

Apri in Ouranos

55 Cnc, una stella G8 V, ha 5 pianeti confermati.

Misurato

Distanza: circa 41 anni luce
Tipo spettrale della stella: G8 V
Pianeti confermati: 5

Distanza dal Sole

Informazioni 41 anni luce. Per attraversarlo:

Luce41 anni
Velocità della Voyager 1729,000 anni
In movimento a 100 km/h442 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

55 Cnc f ha una temperatura di equilibrio compresa tra −50 e +50 °C.

Come è stato scoperto

Primo pianeta scoperto nel 1996 con la velocità radiale (NASA Exoplanet Archive).

I suoi pianeti

55 Cnc b — 14 times Earth's width (estimated from its mass, not measured), a giant, Jupiter-sized or more; its year lasts 15 days; about 430 °C, hotter than boiling water; found in 1996 by radial velocity.
55 Cnc c — 8.5 times Earth's width (estimated from its mass, not measured), Neptune-sized; its year lasts 44 days; about 230 °C, hotter than boiling water; found in 2004 by radial velocity.
55 Cnc d — 13 times Earth's width (estimated from its mass, not measured), a giant, Jupiter-sized or more; its year lasts about 13 Earth years; about −170 °C, below freezing; found in 2002 by radial velocity.
55 Cnc e — 1.9 times Earth's width, a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 18 hours; about 1,700 °C, hot enough to melt rock; found in 2004 by radial velocity.
55 Cnc f — 7.6 times Earth's width (estimated from its mass, not measured), Neptune-sized; its year lasts 260 days; about 4 °C, between freezing and boiling; found in 2007 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

55 Cnc b — 14 times Earth's width (estimated from its mass, not measured), a giant, Jupiter-sized or more; its year lasts 15 days; about 430 °C, hotter than boiling water; found in 1996 by radial velocity.

55 Cnc c — 8.5 times Earth's width (estimated from its mass, not measured), Neptune-sized; its year lasts 44 days; about 230 °C, hotter than boiling water; found in 2004 by radial velocity.

55 Cnc d — 13 times Earth's width (estimated from its mass, not measured), a giant, Jupiter-sized or more; its year lasts about 13 Earth years; about −170 °C, below freezing; found in 2002 by radial velocity.

55 Cnc e — 1.9 times Earth's width, a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 18 hours; about 1,700 °C, hot enough to melt rock; found in 2004 by radial velocity.

55 Cnc f — 7.6 times Earth's width (estimated from its mass, not measured), Neptune-sized; its year lasts 260 days; about 4 °C, between freezing and boiling; found in 2007 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.