alan4908 Posted October 16, 2018 Share Posted October 16, 2018 NGC7129 is a reflection nebula in Cepheus. What I found interesting is that it contains quite a few Herbig Haro (HH) objects. These are formed when high speed narrow jets of partial ionized gas ejected by proto-stars collide with nearby gas and dust. The LRGB image below represents about 10 hours integration time and was taken with my Esprit 150. Approximately 500 HH objects have so for been discovered, so in order to see how many of these within the image, I decided to create an annotated image in Pixinsight via a HH custom catalog. I was quite surprised to discover that I managed to capture 11 HH objects in a single image, although some are a little more visible than others.... Alan LIGHTS: L:12, R:15, G:12, B:18 x 600s, DARKS:30, BIAS:100, FLATS:40 all at -20C. Link to comment Share on other sites More sharing options...
peter shah Posted October 16, 2018 Share Posted October 16, 2018 Great shot....I love the overlay Link to comment Share on other sites More sharing options...
alan4908 Posted October 17, 2018 Author Share Posted October 17, 2018 10 hours ago, peter shah said: Great shot....I love the overlay Thanks Peter - yes, the image annotation function in Pixinsight is very useful for object identification and is highly customisable ! Alan Link to comment Share on other sites More sharing options...
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