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

Stella con 5 pianeti noti

HD 40307

Apri in Ouranos

HD 40307, una stella K2.5 V, ha 5 pianeti confermati.

Misurato

Distanza: circa 42.2 anni luce
Tipo spettrale della stella: K2.5 V
Pianeti confermati: 5

Distanza dal Sole

Informazioni 42.2 anni luce. Per attraversarlo:

Luce42.2 anni
Velocità della Voyager 1750,000 anni
In movimento a 100 km/h455 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

HD 40307 g ha una temperatura di equilibrio compresa tra −50 e +50 °C.

Come è stato scoperto

Primo pianeta scoperto nel 2009 con la velocità radiale (NASA Exoplanet Archive).

I suoi pianeti

HD 40307 f — 2.1 times Earth's width (estimated from its mass, not measured), a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 52 days; about 130 °C, hotter than boiling water; found in 2013 by radial velocity.
HD 40307 d — about 1,800 times Earth's mass; its year lasts 20 days; about 270 °C, hotter than boiling water; found in 2009 by radial velocity.
HD 40307 g — 2.6 times Earth's width (estimated from its mass, not measured), a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 200 days; about −18 °C, below freezing; found in 2013 by radial velocity.
HD 40307 b — about 1,200 times Earth's mass; its year lasts 4 days; about 640 °C, hotter than boiling water; found in 2009 by radial velocity.
HD 40307 c — about 1,900 times Earth's mass; its year lasts 10 days; about 420 °C, hotter than boiling water; found in 2009 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

HD 40307 f — 2.1 times Earth's width (estimated from its mass, not measured), a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 52 days; about 130 °C, hotter than boiling water; found in 2013 by radial velocity.

HD 40307 d — about 1,800 times Earth's mass; its year lasts 20 days; about 270 °C, hotter than boiling water; found in 2009 by radial velocity.

HD 40307 g — 2.6 times Earth's width (estimated from its mass, not measured), a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 200 days; about −18 °C, below freezing; found in 2013 by radial velocity.

HD 40307 b — about 1,200 times Earth's mass; its year lasts 4 days; about 640 °C, hotter than boiling water; found in 2009 by radial velocity.

HD 40307 c — about 1,900 times Earth's mass; its year lasts 10 days; about 420 °C, hotter than boiling water; found in 2009 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.