The Pelican Nebula (also known as IC 5070 and IC 5067) is an H II region associated with the North America Nebula in the constellation Cygnus. The gaseous contortions of this emission nebula bear a resemblance to a pelican, giving rise to its name. The Pelican Nebula is located nearby first magnitude star Deneb, and is divided from its more prominent neighbour, the North America Nebula, by a molecular cloud filled with dark dust.
H-alpha (Hα) is a specific red visible spectral line in the Balmer series created by hydrogen with a wavelength of 656.28 nm, which occurs when a hydrogen electron falls from its third to second lowest energy level. It is difficult for humans to see H-alpha at night, but due to the abundance of hydrogen in space, H-alpha is often the brightest wavelength of visible light in stellar astronomy.
Image Data: Pelican Nebula
Lens / Scope: William Optics Megrez 102 S.V. with WO Type II 0.8x FF/FR
Focal Length: 571.2mm
F/stop: f/5.6
Exposure: Stack of 14 900-second exposures (3:30 hours total exposure)
Mount: Sky-Watcher HEQ5 Pro SynScan GOTO (CdC and EQMOD Control)
Guiding: Sky-Watcher 80 with QHY5 (PHD Control)
Camera: Canon 500D (Digital Rebel T1i) Baader Mod (EOS Utility Control)
Mode: RAW
ISO: 800
White Balance: Daylight
Filter: Astronomik Ha 12nm
Date: August 09, 2013
Start Time: 23:18
Location: Beja, Portugal
Calibration: Darks, Flats, Bias.
Processing: Calibrated, aligned and stacked in DSS. Post-processing in Photoshop.
