T
thnkrx
Guest
Straight from the `Encyclopedia of Extra Solar Planets'<br /><br />HD 2638, G5 star 53.7 parsecs off- a hot jupiter, 3.44 day orbit, 0.48 jupiters mass.<br /><br />HD 27894, K2V star 42.4 parsecs off - a second hot jupiter, with a 18 day orbit and .38 jupiters mass.<br /><br />HD 63454, a K4V star 35.8 parsecs off - a red hot jupiter, with a orbital period of 2.8 days, amd 0.37 jupiters mass.<br /><br />HD 93083. a K3V star 28.9 parsecs off - a warmish planet with a 143.6day orbit and 0.37 jupiters mass.<br /><br />HD 101930, a K1V star 30.5 parsecs off - another warmish planet with a 70.5 day orbit and 0.3 jupiters mass.<br /><br />HD 142022, a K0V star 35.9 parsecs off, with a erratic planet (eccentricity 0.57) a 1923 day (5.27 year) orbit, and a mass of a whopping 4.4 jupiters.<br /><br />Hmm...except for the last planet, these worlds are all fairly small, as extra solar planets go...less massive than Saturn, getting almost down into the Uranus/Neptune range. An improvement in techniques, perhaps?<br /><br />Of interest...K class stars, as a general rule, are only about 1/3 the luminosity of Sol. Does this mean that the brighter G type stars have been `picked over'? This lower luminosity might mean that the two `warm jupiters' (HD 93083 & HD 101930) are actually in those stars habitable zones. <br /><br />Also, all of these stars look to have pretty high metallicities - something on the order of 30-100% greater than that of sol .