Changes

==The Star==

==The Star==

Epsilon Indi is a orange-red main sequence star of spectral class K4-5 Ve.  At first the star was believed to be considerably older then our [[Sun]] because of it's slow rotation.  New observations revealed the star has a much higher rotational speed, which now suggests that it may only be between one and two billion years old, with the likely age of around 1.3 billion years.

Epsilon Indi is a orange-red main sequence star of spectral class K4-5 Ve.  At first the star was believed to be considerably older then our [[Sun]] because of its slow rotation.  New observations revealed the star has a much higher rotational speed, which now suggests that it may only be between one and two billion years old, with the likely age of around 1.3 billion years.

The star has some 77 percent of the mass of our Sun<ref>http://www.chara.gsu.edu/RECONS/</ref>, and some 76 percent of its diameter<ref>http://adsabs.harvard.edu/abs/1983ApJS...53..643J</ref>.  Because it is a cooler class K star, Epsilon Indi is only 14.5 percent as luminous as our Sun.  The [[metallicity]] of Epsilon Indi is estimated from 59 to 110 percent that of our Sun, based on its abundance of [[iron]]<ref>http://adsbit.harvard.edu/cgi-bin/nph-iarticle_query?bibcode=1992A%26AS...95..273C</ref>.

The star has some 77 percent of the mass of our Sun<ref>http://www.chara.gsu.edu/RECONS/</ref>, and some 76 percent of its diameter<ref>http://adsabs.harvard.edu/abs/1983ApJS...53..643J</ref>.  Because it is a cooler class K star, Epsilon Indi is only 14.5 percent as luminous as our Sun.  The [[metallicity]] of Epsilon Indi is estimated from 59 to 110 percent that of our Sun, based on its abundance of [[iron]]<ref>http://adsbit.harvard.edu/cgi-bin/nph-iarticle_query?bibcode=1992A%26AS...95..273C</ref>.

Epsilon Indi Bb orbits the larger Epsilon Indi Ba at a  distance of some 2.65 AU.  The cooler of the two, its spectral class is T6V with a surface temperature of 850K.  It is also the less massive of the two, with an estimated mass some 28 times that of [[Jupiter]].

Epsilon Indi Bb orbits the larger Epsilon Indi Ba at a  distance of some 2.65 AU.  The cooler of the two, its spectral class is T6V with a surface temperature of 850K.  It is also the less massive of the two, with an estimated mass some 28 times that of [[Jupiter]].

There are no known planets orbiting Epsilon Indi at this time.  The distance a planet would need to be to have liquid [[water]] on it's surface is centered around 0.38 AU from Epsilon Indi, or about the same distance [[Mercury]] is from our Sun.

There are no known planets orbiting Epsilon Indi at this time.  The distance a planet would need to be to have liquid [[water]] on its surface is centered around 0.38 AU from Epsilon Indi, or about the same distance [[Mercury]] is from our Sun.