CoRoT-7

Star

CoRoT-7 — an orange G9 dwarf a little smaller and cooler than the Sun, ~522 light-years away in Monoceros. It hosts the first exoplanet ever shown to be rocky.

Open in 3D viewSee CoRoT-7 in the live, interactive 3D map

Key facts

Mass

1.63 × 10³⁰ kg

0.82 M☉

Radius

577,431 km

83% of the Sun's radius

Surface temperature

5,275 K (5,002 °C)

Spectral type

G9V (an orange-yellow dwarf)

Science

Physical

Mass: 1.63 × 10³⁰ kg · 0.82 M☉
Radius: 577,431 km · 83% of the Sun's radius
Density: 2,022 kg/m³ · 2× water; Computed from mass and radius
Spectral type: G9V (an orange-yellow dwarf)

Motion through space

Proper motion: 0.011 arcseconds per year · its drift across our sky; SIMBAD — 2020yCat.1350....0G, 2018A&A...616A...7S
Radial velocity: +31.1 km/s · moving away from the Sun; SIMBAD — 2020yCat.1350....0G, 2018A&A...616A...7S
Speed across our line of sight: 8.31 km/s; Computed from proper motion and parallax
Speed through space, relative to the Sun: 32.2 km/s; Computed from proper motion, parallax and radial velocity

Composition

By mass: A slightly cool, Sun-like star (~0.82 solar masses) in Monoceros.

Temperature

Surface: 5,275 K (5,002 °C)

Radiation & temperature

Luminosity: 1.84 × 10²⁶ W · 0.481 L☉
Surface temperature: 5,275 K (5,002 °C)
Peak wavelength: 549 nm · green-yellow visible light; Computed (Wien's law) from the surface temperature

Discovery & history

Method: Telescope
Name: A CoRoT-mission catalogue designation.

Monitored by the CoRoT telescope, which in 2009 caught the tiny transit of its rocky planet.

Images

Where to find it — in Monoceros, the Unicorn (IAU constellation chart). To the eye it is a single point of light; no telescope has imaged its surface. — IAU / Sky & Telescope, R. Sinnott & R. Fienberg (CC BY 3.0) · Wikimedia Commons

Images from open archives · credit shown per image