- How to find and observe NGC663 (TOTS#4) (eyesonthesky.com)
NGC 663 is an open cluster within our own Milky Way galaxy. It is over 6,800 light years from Earth, so the photons from it reaching your eye in a telescope left that cluster about the time circular ditches - such as the Goseck Circle - were being dug as solar observatories in the 5th millenium BCE. NGC 663 is stil considered a young open cluster, with an estimated age around 20 million years. Here is how to locate it.
- NGC 663 (Wikipedia)
NGC 663 (also known as Caldwell 10) is a young open cluster in the constellation of Cassiopeia. It has an estimated 400 stars and spans about a quarter of a degree across the sky. It can reportedly be detected with the unaided eye, although a telescope is recommended for best viewing. The brightest members of the cluster can be viewed with binoculars. Although the listed visual magnitude is 7.1, several observers have reported higher estimates.
