Pelican nebula (IC5070) in bi colour by Sara Wager (www.swagastro.com) IC5070 (the Pelican nebula) is located in the constellation of Cygnus at approximately 1800 light years from Earth. You can see on the right of the image a large pillar of gas and at the tip of this is a Herbig-Haro object. Herbig-Haro 555 is a narrow jet of gas and matter, ejected by newly born stars at speeds of several hundred kilometres per second. It collides with nearby gas and dust in the interstellar medium, producing bright shock fronts that glow as the gas is heated by friction while the surrounding gas is excited by the high-energy radiation of nearby hot stars. The basic bicolour base was obtained using APP software in the 'combine RGB' tool - It was easy to blend the Ha and OIII in such a way to start off with a pleasing colour that then required selective colour tweaks in Photoshop. Details: M: Mesu 200 T: TMB 152/1200 C: QSI683 WSG with 3nm Ha and OIII filters 30x1800s in each filter - Total exposure time 30 hours http://flic.kr/p/WRFRND
