13point8All planet systems
2 known planets · 169.3 light years

HD 72659

HD 72659 is a yellow star (G2 V) 169.3 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

HD 72659

Type
G2 V
Surface
≈ 5,929 K
Size
1.36 × the Sun
Mass
1.03 × the Sun
Brightness
2.37 × the Sun
Habitable zone
1.14–2.68 AU

The planets

HD 72659

HD 72659 b

Year
9.7 years
Distance from star
4.61 AU
Mass
3 Jupiters
Size
13 × Earth
Temperature
≈ 155 K (-118 °C)
Found
2002, radial velocity (W. M. Keck Observatory)
Outside the habitable zone
HD 72659

HD 72659 c

Year
97.2 years
Distance from star
21.5 AU
Mass
19 Jupiters
Size
12 × Earth
Temperature
≈ 72 K (-201 °C)
Found
2022, radial velocity (Multiple Observatories)
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 wobble

The planet tugs its star back and forth. Spectrographs measure the tiny shift in the star's light, which gives the planet's year and a minimum mass.

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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