Nebulae (Color Wideband)

$Target: NGC 281 (Pac-Man Nebula, emission nebula in Cassiopeia) in OSC + Ha data Distance from Earth: 10,000 light-years Image FOV: 28 x 26 arcmins Telescope: Takahashi TOA-150 refractor (f/7.3) (for OSC data) and Takahashi TOA-130 refractor with TOA-130 0.78x reducer (f/6.0) and Astrodon 5nm Ha filter (for Ha data) Camera: SBIG ST2000 XMC ccd (for OSC) and Starlight Xpress SXVF-H9 ccd (for Ha) Focus: Autofocus Images: OSC data captured from GRAS-003 in Mayhill, NM at an image scale of 1.39 arcsec/pixel; total exposure time of 80 minutes on Sep 28, 2010 and Ha data captured in Pittsburgh, PA at an image scale of 1.69 arcsec/pixel; total exposure time of 180 minutes on Nov 3, 4, 6, 2009 Processing: MaxIm DL 5.05 & 5.12, RegiStar 1.0 and Photoshop CS3 ; final image scale 1.69 arcsec/pixel, image cropped$

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Target: NGC 281 (Pac-Man Nebula, emission nebula in Cassiopeia) in OSC + Ha data

Distance from Earth: 10,000 light-years

Image FOV: 28 x 26 arcmins

Telescope: Takahashi TOA-150 refractor (f/7.3) (for OSC data) and Takahashi TOA-130 refractor with TOA-130 0.78x reducer (f/6.0) and Astrodon 5nm Ha filter (for Ha data)

Camera: SBIG ST2000 XMC ccd (for OSC) and Starlight Xpress SXVF-H9 ccd (for Ha)

Focus: Autofocus

Images: OSC data captured from GRAS-003 in Mayhill, NM at an image scale of 1.39 arcsec/pixel; total exposure time of 80 minutes on Sep 28, 2010 and Ha data captured in Pittsburgh, PA at an image scale of 1.69 arcsec/pixel; total exposure time of 180 minutes on Nov 3, 4, 6, 2009

Processing: MaxIm DL 5.05 & 5.12, RegiStar 1.0 and Photoshop CS3 ; final image scale 1.69 arcsec/pixel, image cropped