by Ann » Sun Jul 10, 2011 7:25 pm
I very much enjoyed the Alpha Scuti field image.
Note above the bright star a loose cluster of predominantly blue stars. This is cluster NGC 6664. According to (an old) paper from 1982, "Intermediate-Band Photometry in the Open Cluster NGC 6664" by Edward G. Schmidt, NGC 6664 is about 46 million years old, so it is younger than the Pleiades. It contains at least two stars of spectral class B3 as well as two or three blue stragglers and a binary Cepheid, EW Scuti. But Art or Chris, I need your help here - according to the paper, the distance modulus is 10.7. What does that mean, and how far away does that make the cluster?
To the right of cluster NGC 6664, at about 10 o'clock, you can see some red nebulosity and a vividly orange-red star. The red star is carbon star RX Scuti.
Very interesting picture! Thank you, Leonardo Orazi!
Ann
I very much enjoyed the Alpha Scuti field image.
Note above the bright star a loose cluster of predominantly blue stars. This is cluster NGC 6664. According to (an old) paper from 1982, "Intermediate-Band Photometry in the Open Cluster NGC 6664" by Edward G. Schmidt, NGC 6664 is about 46 million years old, so it is younger than the Pleiades. It contains at least two stars of spectral class B3 as well as two or three blue stragglers and a binary Cepheid, EW Scuti. But Art or Chris, I need your help here - according to the paper, the distance modulus is 10.7. What does that mean, and how far away does that make the cluster?
To the right of cluster NGC 6664, at about 10 o'clock, you can see some red nebulosity and a vividly orange-red star. The red star is carbon star RX Scuti.
Very interesting picture! Thank you, Leonardo Orazi! :D
Ann