Old and new data of M42 from two scopes.

Old and new data of M42 from two telescopes A 4 inch refractor and a ten inch reflector, A total of about 30 hours of data.

The Orion nebula

M42 and its surrounding nebulosity

M42 and its surrounding nebulosity. This image of the Orion nebula was taken on four separate nights with very clear sky conditions. On the first two evenings the sky was very bright with the moon being almost full so I used my Astronomik H-alpha filter. On the third evening I used an O111 filter and on the fourth evening I used an S11 filter with RGB filters. I captured 60 second and five minute sub frames with matching dark frames and combined them with bias frames and flat field frames reducing the effect of nose and vignetting in the final image. The telescope was a 4 inch f/6.3 refractor with a Vixen Atlux mount, PHD auto guiding , a set of Astronomik narrowband and RGB filters. and an Atik 383L mono CCD camera. The total exposure times were ten minutes for each RGB filter, six hours and ten minutes using a H Alpha filter, two hours and 45 minutes using an O111 filter and two hours and ten minutes using an S11 filter giving  a total exposure time of 11 hours and 35 minutes. Notice the faint surrounding nebulosity in the background

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Hubble Palette

Hubble Palette with enhanced background

OIII, SII, H-alpha luminance RGB colour

Hubble Palette RGB colour

The Pelican nebula and the North America nebula

IC5070, IC5067. the Pelican nebula . This patch of nebulosity lies just west of the North American nebula in the constellation of Cygnus the Swan. I took this image under very clear sky conditions with full moon light to contend with. Stars was only visible down to magnitude 4. The telescope I was using was a 4 inch f/6.3 refractor with a Vixen Atlux mount, PHD auto guiding, a set of Astronomik narrowband filters and an Atik 383L mono CCD camera. I captured five minute sub-frames with matching dark frames and combined them with bias frames to reduce readout nose and flat field frames to reduce the effect of vignetting in the final image. The total exposure times were 60 minutes using a H Alpha filter, 35 minutes using an O111 filter, then the clouds rolled in and I only managed to capture 15 minutes using a S11 filter.

NGC700 was similarly imaged

The two images were combined into a mosaic

B33 and NGC7000

NGC7000. The North America nebula.  This large patch of nebulosity lies about one degree east of the bright star Deneb in the constellation of Cygnus the swan. On this particular evening the moon was full and stars were only visable down to magnitude 3. I was using my 4 inch f/6.3 refractor, a Vixen Atlux mount, PHD auto guiding, an Atik 383L mono CCD camera and a set of Astronomik narrowband filters, S11, O111 and H-alpha. I captured five minute subframes with matching dark frames and combined them with flat field frames and bias frames reducing the effect of noise and vignetting in the final image. The total exposure times were 60 minutes using an O111 filter, 60 minutes using a H-alpha filter, 50 minutes using a S11 filter and five minutes using a blue filter.

Hubble Palette

RGB

B33 data from two telescopes: a 4 inch F/6.3 refractor and a ten inch F/4.8 reflector.