Cardiff Astronomical Society

katherine.compton@virgin.net

Nick Hart

001 NH M85 and NGC4394 by Nick Hart. These two galaxies are located in the constellation of Coma Berenices. M85 is an elliptical galaxy and NGC4394 is a barred spiral galaxy. They are both at a distance of about 60 million light years.This image was taken under poor sky conditions using a ten inch F4.8 reflector, PHD auto guiding and an Atik 383L mono CCD camera. 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. The total exposure times were 40 minutes in the red, 30 minutes in the green and 25 minutes in the blue.

002 NH M106 by Nick Hart. This spiral galaxy lies in the constellation of Canes Vernatici but it is sometimes named NGC 4258. It lies at a distance of about 23 million light years shining at about magnitude 9. I was using a ten inch F4.8 reflector, PHD auto guiding and an Atik 383L mono CCD camera. 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 . The total exposure times were 50 minutes using a blue filter, 35 minutes using a green filter and 30 minutes using a red filter.

003 NH Meropes Nebula

004 NH NGC6914 Butterfly Nebula by Nick Hart. This diffused reflection nebula is a very colourful region of the Milky Way lying at a distance of about 6,000 light years in the constellation of Cygnus.This PHD guided exposure was taken using ten minute sub-frames with matching dark frames.The total exposure times were twenty minutes for each colour channel and one hour using a Lumicon H-alpha filter. Taken using a four inch f/7 refractor with a field flattener making it f/6.3. The camera was an Atik 383L:

005 NH M42 by Nick Hart. This image of M42 was taken under very clear sky conditions . Notice the surrounding faint nebulosity in the hydrogen alpha regions . An 80mm refractor was used. PHD auto guiding and an Atik 383L mono CCD camera . The total exposure times were 90 minutes using a H-alpha filter, 20 minutes using an O111 filter and ten minutes using RGB filters:

006 NH IC 1318 the Butterfly Nebula by Nick Hart. The nebula lies in the constellation of Cygnus near the bright star Gamma Cygni. Five minute sub-frames were captured with matching dark frames of the luminance channel, H-alpha with a total exposure time of twenty minutes. The colour channels had exposure times of sixty seconds. The image was taken using a ten inch reflector with PHD guiding:

007 NH NGC 5146a1 Cocoon Nebula and Andromeda by Nick Hart This unguided image was taken using a ten inch, f/4.8 reflector with an Atik 314L CCD camera. Sixty second sub-frames were captured and with matching dark frames. The total exposure times were ten minutes for each colour channel and 120 minutes for the luminance channel, H-alpha:

008 NH M31 Power Point by Nick Hart. This unguided image of M31 reveals the dust lines of our nearest neighbouring galaxy, the Andromeda galaxy. Sixty second sub-frames were captured with matching dark frames. The total exposure time was 15 minutes for each colour channel using a ten inch, f/4.8 reflector and an Atik 314L CCD camera:

009 NH M1 and NGC7000 by Nick Hart. This unguided image of the Crab Nebula M1, was taken using an Atik 314L CCD camera, a ten inch f/4.8 reflector. The total exposure times were twenty minutes for each colour filter and thirty minutes using a H-alpha filter. One minute sub-frames were captured with matching dark frames:

10 NH NGC7000 by Nick Hart. This image is a small section of NGC7000, A section of the south western limb commonly named the wall of the North America Nebula in Cygnus the Swan. This unguided image was made by capturing sixty second sub-frames and matching dark frames. The total exposure times were 15 minutes for each colour filter and 40 minutes using an H-alpha filter:

011 NH NGC 600 Crescent and Veil nebulae NGC6888 by Nick Hart. This image was taken using exposure times of 15 minutes for each colour filter and one hour using a H-alpha luminance filter. Unguided, 60 seconds sub-frames with matching dark frames were captured. A ten inch f/4.8 reflector and an Atik 314L CCD camera were used:

012 NH NGC6960 best By Nick Hart This unguided image of the Veil nebula NGC6960 was taken using an Atik 314L CCD camera using a ten inch reflector. 60 second subframes were captured with matching dark frames. The total exposure times were five minutes for each colour filter and 120 minutes for the luminance H-alpha channel:

013 NH NGC7635 and NGC891 by Nick Hart. The Bubble nebula. This emission nebula lies in the constellation of Cassiopeia at a distance of about 11,000 light years. This unguided image was taken using one minute sub-frames stacked with dark frames. An Atik 314L CCD camera was used with a ten inch, f/4.8 reflector. The exposure times for the colour channels was two minutes through each RGB filter. However, the luminance channel in H-alpha had a total exposure time of two hours

014 NH NGC891 by Nick Hart This edge-on spiral galaxy lies in the constellation of Andromeda, shining at magnitude 10.8, at a distance of 27-30 million light years. Four, five minute sub-frames were captured for each colour channel, with matching dark frames. A ten inch, f/4.8 reflector was used with PHD auto guiding and an Atik 383L CCD camera.

015 NH M1 colour

016 NH M42 RGB by Nick Hart. The RGB exposure times were twenty-five minutes for each colour channel using sets of five one minute sub-frames combined with four, five minute sub-frames and matching dark-frames. The luminance channels, H-alpha and Olll were taken capturing five minutes sub-frames. The total exposure time was ninety minutes using an Olll filter and 120 minutes using a H-alpha filter. This image was captured using a ten inch, f/4.8 reflector with PHD auto guiding and an Atik 383L CCD camera:

017 NH NGC4631 by Nick Hart. The Whale galaxy. This edge-on spiral galaxy lies at a distance of about thirty million light years in the constellation of Canes Venatici. This unguided image was captured using an Atik 314L CCD camera through a ten inch f/4.8 reflector.The total exposure times were thirty five minutes for each RGB colour filter, using sixty second sub-frames with matching dark frames:

018 NH NGC4565 Needle Galaxy by Nick Hart. This beautiful edge-on spiral galaxy lies in the constellation of Coma Berenices at a distance of about forty million light years. This image was taken unguided, using an Atik 314L CCD camera through a ten inch, f/4.8 reflector. Sixty second sub frames and matching dark frames were used, making a total exposure time of forty minutes for each RGB colour filter:

019 NH M31 Andromeda Galaxy by Nick Hart. Twenty minute exposure time for each RGB colour filter using ten minute sub-frames and matching dark frames was made through an f/7, 80mm refractor:

020 NH The Heart Nebula NGC 1805

021 NH NGC6888 the Crescent Nebula by Nick Hart This image was taken through a ten inch reflector using PHD auto-guiding. Five minute sub-frames and matching dark frames were used.The exposure times were five minutes for each RGB colour filter , thirty minutes for Olll and sixty minutes for H-alpha. The Crescent nebula lies in the constellation of Cygnus at a distance of about 5,000 light years:

022 NH Wizard Nebula NGC7380 by Nick Hart. This star-forming region lies at a distance of about 8,000 light years in the constellation of Cepheus. These images were captured using a ten inch, f/4.8 reflector with PHD auto guiding. The exposure times were one hour using a H-alpha filter, one hour using an Olll filter and thirty minutes using each RGB colour filter. Five minute sub frames with matching dark frames . The images follow: NGC7380. Taken using RGB filters:

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