Saturday 26 August 2023

IC1396, The Elephant trunk nebula.

IC1396, The Elephant trunk nebula. This patch of nebulosity lies in the constellation of Cepheus the king. I took these images on two separate evenings under clear moonless sky conditions with stars visible down to magnitude 5. On this occasion I was not using auto guiding and only using 60 second sub frames with the camera set on x 2 bin mode. I then combined the data with matching dark frames and flat field frames to reduce the effect of noise and vignetting in the final images making the two sections mosaic. The telescope I was using was an f/6.3, 4 inch refractor, a Vixen Atlux mount, a set of Astronomik narrowband filters and an Atik 383L mono CCD camera. The exposure times were 60 minutes using a H A filter, 20 minutes using an O111 filter, 20 minutes using an S11 filter, 15 minutes using a H beta filter and 15 minutes using a blue filter.