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6 known planets · 127.1 light years

HD 10180

HD 10180 is a yellow star (G1 V) 127.1 light years away, with 6 confirmed planets, 1 of them in the habitable zone. 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 10180

Type
G1 V
Surface
≈ 5,911 K
Size
1.11 × the Sun
Mass
1.06 × the Sun
Brightness
1.49 × the Sun
Habitable zone
0.909–2.13 AU

The planets

HD 10180

HD 10180 c

Year
5.76 days
Distance from star
0.0641 AU
Mass
8.6 Jupiters
Temperature
≈ 1185 K (+912 °C)
Found
2010, radial velocity (La Silla Observatory)
Too hot
HD 10180

HD 10180 d

Year
16.36 days
Distance from star
0.129 AU
Mass
10 Jupiters
Temperature
≈ 837 K (+564 °C)
Found
2010, radial velocity (La Silla Observatory)
Too hot
HD 10180

HD 10180 e

Year
49.75 days
Distance from star
0.27 AU
Mass
at least 25 Earths
Size
5.4 × Earth
Temperature
≈ 578 K (+305 °C)
Found
2010, radial velocity (La Silla Observatory)
Too hot
HD 10180

HD 10180 f

Year
122.74 days
Distance from star
0.493 AU
Mass
at least 24 Earths
Size
5.2 × Earth
Temperature
≈ 428 K (+154 °C)
Found
2010, radial velocity (La Silla Observatory)
Too hot
HD 10180

HD 10180 g

Year
604.67 days
Distance from star
1.43 AU
Mass
11 Jupiters
Temperature
≈ 251 K (-22 °C)
Found
2010, radial velocity (La Silla Observatory)
In the habitable zone
HD 10180

HD 10180 h

Year
6.0 years
Distance from star
3.38 AU
Mass
at least 64 Earths
Size
9.4 × Earth
Temperature
≈ 163 K (-110 °C)
Found
2010, radial velocity (La Silla Observatory)
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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