Location of photoPommier Observatory, Portland, OR, USA
Date/Time of photo2012-10-17 through 2013-09-07
EquipmentTelescope/Mount: Celestron Compustar C14 with Astrophysics 0.75x focal reducer (f/8.3) Camera: SBIG STL 11000M with Baader Planetarium H-alphaRGB filters. Exposures: Ha:R:G:B=660:180:180:180=20 hours total exposure
DescriptionNGC 281 is an HII emission nebula in Cassiopeia also known as the Pacman Nebula due to its resemblance to the video game character. The central star cluster is IC 1590 which is an OB association of hot, young blue supergiant stars. The brightest stars are part of a 5-star system. Fierce stellar winds from these stars are sculpting numerous elephant trunk projections along the periphery of the visible nebula, analogous to the pillars of creation in the Eagle Nebula. The trunks all point toward the central star cluster. Numerous Bok globules are seen in silhouette against the nebula as well as a large dust cloud, also eroded by stellar winds, that represents the Pacman's mouth. The nebula lies 10,000 light-years from Earth.