13point8All planet systems
2 known planets · 2,153 light years

KOI-319

KOI-319 is a yellow star 2,153 light years away, with 2 confirmed planets. Distances and orbital speeds are to scale; the star and planets are enlarged so you can see them.

Day 0
habitable zone (estimate)planet orbits

Green band: where liquid water could exist on a planet's surface. Drag to turn the system, pinch or scroll to zoom.

The star

The star

KOI-319

Type
yellow star
Surface
≈ 5,880 K
Size
2.06 × the Sun
Mass
1.32 × the Sun
Brightness
5.23 × the Sun
Habitable zone
1.71–4.01 AU

The planets

KOI-319

KOI-319 b

Year
46.15 days
Distance from star
0.267 AU
Mass
10 Jupiters
Size
11 × Earth
Temperature
≈ 703 K (+430 °C)
Found
2014, transit (Kepler)
Too hot
KOI-319

KOI-319 c

Year
80.10 days
Distance from star
0.399 AU
Mass
28 Jupiters
Size
12 × Earth
Found
2014, transit timing variations (Kepler)
Outside the habitable zone

Masses found by the wobble method are minimums, because the orbit's tilt is unknown. Temperatures are equilibrium estimates for a bare planet, before any atmosphere.

How we know

The shadow

The planet passes in front of its star and dims it by a fraction of a percent, every orbit. The dip gives the planet's size and year.

Early and late

A known planet arrives early or late for its transits, betraying the pull of another, unseen planet.

Sources

  1. Planet and star parameters: NASA Exoplanet Archive, Planetary Systems Composite Parameters, retrieved 1 Nov 2026. 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.
  2. Position: HYG Database v4.1 (CC BY-SA 4.0).
  3. Habitable zone: a simple estimate from the star's brightness (√L × 0.95 to 1.67 AU), shown as a guide.
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