Herbig-Haro 555 in Cygnus


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Description: This close-up of the neck of the Pelican nebula centers in HH 555, located in the tip what looks like an elephant's trunk.  Herbig-Haro objects are small-scale shock regions intimately associated with star-forming regions.  At the tip of the trunk is a jet that can barely be seen, indicating the presence of an unseen protostar.  The FOV is 14.7 x 9.7 arc-min.  Southwest is up.
Exposure Data: 8/29/2004.  Halpha filter, 15 x15 min., binned 2x2. -20C, 0.84 arc-sec./pixel.
Automatically acquired via CCDAutoPilot and CCDSoft, reduced and aligned in Mira, combined in Sigma, curves, levels, other processing in Photoshop.
Optical System: 14.5 Ritchey-Chretien RCOS Truss @ F/9, ST-10XME NABG CCD camera, FLI CFW-2 filter wheel, Paramount ME. AstroDon filters with luminance filter. AO-7 guided and dithered 4 pixels.
Comments: Automatic acquisition under a bright moon.