The weather looks good, so I have drafted more targets for tonight!
Serpens Cauda is tail section of the constellation generally referred to as Serpens. It is unusual because of it being split into 2 parts of the sky. I have previously reviewed the head (Serpens Caput).. Because of the split, my review of this half will shorter than normal.
The Main Stars:
Theta Serpentis (Ser). I know this pair as a fine double star, however, the literature refers to this as being a genuine triple system with the third related star being 7 arc minutes away.
https://en.wikipedia.org/wiki/Theta_Serpentis
Eta Serpentis (Ser). Eta is the process of evolving from a sub-giant to a giant star.
https://en.wikipedia.org/wiki/Eta_Serpentis
Nu Ser. This star marks the eastern most or beginning part of the Tail.
https://en.wikipedia.org/wiki/Nu_Serpentis
Objects of interest.
Gliese 710. This 9th Mag star is predicted to pass within 0.2 light years of Sol in less than 1.3 million years. This is expected to have major affects on the Oort Cloud.
https://en.wikipedia.org/wiki/Gliese_710
NGC 6604. An open cluster with nebula. This is often overlooked because of its prominent neighbours (M16 etc).
https://en.wikipedia.org/wiki/NGC_6604
IC 4756. A large open cluster. I could not find much on this one, but I do not know it, so I will have a look.
https://en.wikipedia.org/wiki/IC_4756
Messier Objects: M16.
Caldwell Objects: Nil