Tuesday, 15 January 2019

The Horsehead region of Orion

The Horsehead region . An Atik 383L mono CCD camera was used. The exposure times were six hours using an Astronomik H-Alpha filter and 30 minutes using green and blue filters, making a total exposure time of 7 hours. The telescope was an 80 mm f/7 refractor with a focal reducer and field-flattener making it f/6.3. I was using a Vixen Atlux mount with PHD auto-guiding. I captured 10 minute sub-frames with matching dark frames and combined them with flat field frames to reduce the effect of
vignetting in the final image.

A work in progress


Stars Eroded


Tuesday, 8 January 2019

M51 from two cameras

Here we have an image of M51, two images combined using two CCD cameras . The Atik mono 383L and the Atik mono 314  camera. This image reveals the ghost arms of the galaxies.


Sunday, 6 January 2019

NGC4567 and NGC4568 and the Virgo Cluster

NGC4567 and NGC4568. These two galaxies are known as the Siamese twins and lie in the constellation of Virgo. I took this image using my ten inch f/4.8 reflector, a Vixen Atlux mount, PHD auto guiding and an Atik 383L mono CCD camera. I used Astronomik RGB filters with total exposure times of 40 minutes for each filter. The sub frames were five minutes long with matching dark frames combined with flat field frames to reduce the effect of vignetting in the final image.


The Virgo Cluster 2 panel mosaic

IC1848, the Soul nebula

Here we have another section of the Soul nebula in Cassiopia.
The clouds were moving in fast on this particular evening and I only had 30 minutes of imaging time using an Astronomik H-alpha filter. The colour data however were taken from an old wide angle narrowband image using an 80mm refractor. The luminance data were taken using my ten inch f/4.8 reflector an Atik 383L mono CCD camera with PHD auto guiding. I captured six, five minute subframes with matching dark frames and combined them with flat field frames to reduce the effect of vignetting in the final image.



Full Size


Monday, 5 November 2018

A 9-section mosaic of IC 1805 using narrowband filters and IC 1871


9 individual panels adding two extra panels to complete the mosaic.
IC1805 the Heart Nebula . This lies in the star constellation of Cassiopeia next to the Soul nebula. I took this image on 7 separate evenings with total exposure times of 60 minutes for each filter . The
telescope I was using was my 10 inch f/4.8 reflector, a Vixen Atlux mount, PHD auto guiding, an Atik 383L mono CCD camera and a set of Astronomik narrowband filters H-alpha, OIII and SII. I captured five-minute sub frames with matching dark frames and combined them with flat-field frames to reduce the effect of vignetting in the final image.

Final mosaic

Stars eroded

Luminance

Final two panels










Mosaic of the 7 panels


Stars eroded

IC 1871 the Soul Nebula . This lies next to the Heart nebula in the star constellation of Cassiopeia the Queen . I took this image on two separate evenings using narrowband filters H-alpha , OIII and SII with total exposure times of sixty minutes for each filter. I captured five minute sub frames with matching dark-frames and combined them with flat-field frames to reduce the effect of vignetting in the final image . This image was taken using my ten inch reflector, a Vixen Atlux mount, PHD auto guiding and an Atik 383L mono CCD camera.







Sunday, 14 October 2018

The outermost region of IC1805

This image of the Heart nebula was taken using my ten inch f/4.8 reflector, a Vixen Atlux mount, PHD auto-guiding and an Atik 383L mono CCD camera.
I captured five minute sub-frames with matching dark-frames and combinded them with flat-field frames to reduce the effect of vignetting in the final image. The total exposure times werw 20 minutes for each R.G.B. colour filter, 40 minutes using  SII, 40 minutes using an OIII filter and 60 minutes
using a H-alpha filter.


Full size RGB


Full size Hubble Palette

Full size RGB + Hubble Palette

Sunday, 7 October 2018

A section of sky in the elephant trunk nebula

Here we have another section of sky in the elephant trunk nebula . On this particular evening I had problems with the tracking on the mount and time was very limited . I only had one hour before the telescope would crash into the pier. However I still consider this image as useful.

I was using my ten inch F4.8 reflector, a Vixen Atlux mount and an Atik 383L mono CCD camera. I only used narrowband filters SII, OIII and H-alpha, capturing five-minute sub frames with matching dark frames and combined them with flat field frames to reduce the effect of vignetting in the final image. The total exposure time was limited to 40 minutes using an H-alpha filter, ten minutes using an OIII filter and ten minutes using an SII filter.

Mosaic image


Full size