Talk:HD 69830

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Misleading statement?[edit]

"HD 69830 is the first extrasolar planetary system around a Sun‐like star without any known gas giants."

I'm not sure if this statement is correct - the Lovis et al. paper suggests that the outer planet may have a core/gaseous envelope ratio close to 1, which would make it similar to Uranus or Neptune, and goes on to state "Although this ~20MEarth planet is probably not telluric, its discovery opens the way to an exciting topic in astronomy: the characterization of low-mass planets in the habitable zone of solar-type stars." - i.e. it is probably not a terrestrial.

It may be more correct to state that the system doesn't contain Jupiter- or Saturn-mass planets. Chaos syndrome 10:42, 22 June 2006 (UTC)

Even then it might be a whole system of Saturns. What's the inclination on this lot? I assume there's a minimum constraint as on Gliese 581's; any less than 10 degrees and GJ 581's orbits becomes unstable. GJ 581 c-d and HD 69830 b-c are comparable in semimajor axis. -- Zimriel (talk) 05:37, 21 August 2008 (UTC)

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