![[personal profile]](https://www.dreamwidth.org/img/silk/identity/user.png){kind=small}
Kappa Reticuli and 16 Cygni
Dec. 7th, 2010 05:50 pmKappa Reticuli
70 light years from Sol, this is an F5IV or V star with a metallicity around 80% of Sol’s, but it’s another young one, only 1.8 billion years old. ETA: Beichman et al give a possible upper age limit of 9.38 billion years.
16 Cygni
Not to be confused with the much closer 61 Cygni, this is a three-star system 70 light years away. It is composed of a G2V and G5V star (A and B) separated from each other at a distance of 800 or so AU, plus a red dwarf, C, that is some 70 AU from A. Metallicity appears to be around 1.2 times that of Sol, and the system may be as old as 10 billion years. B has a very large planet that was discovered in the mid-nineties.
70 light years from Sol, this is an F5IV or V star with a metallicity around 80% of Sol’s, but it’s another young one, only 1.8 billion years old. ETA: Beichman et al give a possible upper age limit of 9.38 billion years.
16 Cygni
Not to be confused with the much closer 61 Cygni, this is a three-star system 70 light years away. It is composed of a G2V and G5V star (A and B) separated from each other at a distance of 800 or so AU, plus a red dwarf, C, that is some 70 AU from A. Metallicity appears to be around 1.2 times that of Sol, and the system may be as old as 10 billion years. B has a very large planet that was discovered in the mid-nineties.