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HD 69830

This sunlike yellow-orange star has a circumstellar dust ring with 25 times more material than the interplanetary dust cloud of the Solar System. The material is at about 1 AU from the central star, two to four times closer than the Sun's dust. The dust is thought to have come from the recent fragmentation of an ~30 km radius asteroid, like those found in the outer parts of the Solar System's main belt.

There are three Neptune sized planets around the star in a distance of 0.07, 0.18 and 0.63 AE. The orbit periods are 8.67, 31.6 and 197 days. The outer one of the three planets could have temperatures which allow liquid water. All three planets should be able to support an atmosphere.

Constellation: Puppis
Age: 2 - 10 billion years
Distance: 41.04 light-years
Spectral class: K0
Visual magnitude: 5.96
Luminosity: 0.567 * Sun
Mass: 0.85 * Sun
Diameter: 0.960 * Sun
Radial velocity: 30.5 km/sec

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    HD 69830
The dust belt seen from a planet around HD 69830.
Graphic: NASA/JPL-Caltech/R. Hurt (SSC)

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