NGC 281

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 Largest Image (1 meg)

Description: This emission nebula is known as 'The Pacman Nebula'. It is a large, ionized hydrogen cloud that is made visible by the radiation from the young, hot stars within the central, open cluster ( IC 1590). The brightest 'star' in this cluster is responsible for most of the ionizing radiation and is actually a quadruple star. We can make out three of these stars in the above image. Also visible are some Bok Globules, which are the small, dark features composed of gas and dust.
Constellation: Cassiopeia
Distance: 10,000 light years
Date: 13, 15, 16, 21, 23 august & 6 september
Equipment: AP155 @ f/7, ST10XME, AP1200
Exposure: SII,Ha,OIII: 8.5-4-10 hours All unbinned (Astrodons)

Mapped as follows: SII to Red, Ha to Green, OIII to Blue

Note: This is my first mapped image.