2010-10-13

jude_rook: Image of Andromeda Galaxy (Default)
2010-10-13 06:10 pm

Gliese 796/HD 196761 and Theta Boötis

Details on sunlike stars get scantier as we get farther and farther from Sol.  To avoid doing a lot of very short entries, I will be doubling down from here on -- doing two stars per day, unless there is a lot to say about a particular one.

Gliese 796/HD 196761

A G8V star in Capricorn, about 47 light years from us.  Metallicity is about half that of Sol.  I couldn’t find anything on its age.  Psi Capricorni, which we’ll get to soon, is only 1.7 light years away.  ETA: Mamajek and Hildebrand give an age range of 5.1 to 5.2 billion years.


Theta Boötis

Also known as “Asellus Primus”, a traditional Latin name.  It’s an F7V star with a far M companion, about 47 light years from us.  Around 3 billion years old, it has a metallicity around 85% of Sol’s.  ETA: Bryden et al give an age range of 0.4 to 4.7 billion years.