Art-285 Camera Details here.
With the experience gained from my MX716 camera, and my good site at Hexham, I was able to attempt long exposure imaging straight away following the successful build of the camera.
For all these images, click on the thumbnail for a medium size image (normally 800x600) and on the link in each description for the full size (around1390 x 1040) image.
A couple of days later, the evening of 4th April the skies cleared exceptionally well after rain, and before the next weather front arrived I had excellent clarity. The first target was NGC2903 - a beautiful barred spiral galaxy in Leo. I spent some time fine tuning the Periodic Error on my Gemini mount, with the result that I was able to image for 3 minutes unguided without any trailing, and obtained a pleasing result. L 10 x 3 min frames, RGB each 3 min binned 2x2. Artemis with Mirage at f6.3 In 2009 with more processing experience and later software I reprocessed the original data and consider the result to be a much more pleasing rendition. |
|
I then decided to try for the Ringtail colliding Galaxies NGC 4038/4039 in Corvus. I previously imaged this from COAA in Portugal, but wanted it using my own telescope from Hexham. It was low at 15 degrees, and the tails are much fainter than the galaxy cores. So two versions, one heavily stretched to (just) show the tails, and another more pleasing. The clouds rolled in just as I was finishing the sequence, so I had to synthesise the blue frame from the red and green. L 10 x 4 min frames, RG(B) each 1 x 4 min binned 2x2. Artemis with Mirage at f6.3 The stretched image shows what was probably a speck on the cover glass of the chip - needs attention! Full size (not tails) |
|
Many years later (2019) using recently acquired software I did some work on the above images with this result. But there is no doubt this subject deserves a closer visit if I ever have suitable sky conditions here in NE England. |
|
Well, for once the weather smiled on me and the following night of 8/9th June was also clear although hazy. But again good enough to obtain a second image of Pluto, confirming movement. Animated gif here The movement is over 23 1/2 hours, and Skymap gives it as around 96 arc-secs. Clyde Tombaugh must have had the patience of a saint when originally looking for Pluto! |
|
Mid June in the Northern UK strands us with twilight nights, the darkest being Nautical twilight. And this year (2005) the longest days also coincided with a Full Moon. No chance of deep sky imaging, one might think. But a Hydrogen alpha deep sky filter cuts out all the upper end of the spectrum, and enables imaging of nebulae even in twilight moonlit skies. The evening of 22nd. June was very clear following days of cloud and rain, and I took the opportunity to revisit the Crescent Nebula, NGC6888 in Cygnus. And the filter certainly proved its worth! Art285, Mirage 8 at f 6.3, 12 frames x 4 minutes. Colour added in Photoshop. This image was published in the September 2005 issue of Sky at Night magazine Full size. (440 KB) |
|
I also paid a visit to the Eagle Nebula, M16 in Serpens.. Setup as above, 10 frames x 4 minutes, monochrome is the original H-alpha, this time colour added using Noel Carboni's Actions. Full size
monochrome This and the above Crescent nebula images are the first using my new 90 mm aperture 1250 mm focal length Skymax Mak-Cass as a guide scope with my modified Vesta webcam and GuideDog software. I'd previously used my AT1010 80 mm aperture 480 mm focal length refractor, but the longer tube and 2x Barlow to increase the guiding accuracy made the setup rather cumbersome and prone to movement. The new arrangement seems very promising! |
|
At the end of August I revisited COAA - the Astronomy centre in the Algarve run by Bev and Jan Ewen-Smith. Beautiful weather, almost too hot at times - the area was suffering from a prolonged drought with forest fires inland. Fortunately they were mostly under control when I was there, so the smoke which had earlier obscured the sky was no longer a problem. I was interested in some Southern objects which I had been unable to image satisfactorily from my more Northern home location, and was able to capture a number of images. The first attempt on 27th. August, tho' not entirely successful, was the Eastern section of the Veil, NGC6992 - not a deep south object of course. Several 1 minute frames unguided, Artemis on the COAA 8" f4.4 Newtonian. H-alpha filter. The target was just a bit too big to fit in two frames. |
|
The following night an attempt at the Lagoon nebula was disappointing (but see below!) Then much better, on 29th. August, Delle Caustiche - the Small Sagittarius Star Cloud, also known as M24. Artemis with my 135 mm lens on the single axis drive camera mount. Full Size (270 Kb!) |
|
The following night was too hazy for imaging, but 31st. August was nicely clear, and this Lagoon (M8) was the result. Artemis with my TMB refractor, 8 x 1 minutes, H-alpha filter. Mounted on the COAA GPDX, thanks, Bev. I didn't get any colour information - as time progressed during the H-alpha sequences, I noticed some strange spikiness creeping into the star images. As the sky moved round, I was imaging through a tree! But for a false coloured (red) medium format image click here |
|
On the last night of my holiday, 1st. September, I reverted to the 135 mm camera lens on the COAA camera mount to tackle NGC7000 - the North America Nebula. Slight haze at low levels but with the nebula being almost overhead, no problems. 32 Luminance frames using H-alpha, 9 each standard RGB, all 1 minute frames. Very satisfactory! |
After my return from COAA, not only was there a full Moon, but I wanted to make some changes to my guiding camera mount. A bit of work with Aluminium bar and tube rings, and all was ready. Except for clear sky! But eventually a beautiful night arrived on 23/24 September (2005) and I was able to obtain a full image of NGC6992. This time with the TMB refractor and my 0.63 Celestron reducer. A bit of star distortion at the edges due to the reducer, but the whole segment nicely encompassed in a mosaic of two frames. 6 minute frames, Art285 with H-alpha filter. |
|
Although there was a bright last quarter Moon, the air was extremely clean, so I then targeted M33, the Pinwheel galaxy in Triangulum. Only 45 degrees away from the Moon, nevertheless a pleasing image. Again the Art285 and TMB refractor with reducer and 6 minute frames. Also again some star distortion. I need to look for an alternative reducer. |
I still wasn't happy with NGC6992 above, but a couple of clear nights on 25th. and 26th. September gave the opportunity to revisit the target with the Artemis at prime focus of the TMB. A little lost from the bottom edge, but with colour as well, I'm well pleased! Artemis 285, TMB105 refractor. Mosaic of two images. Luminance each 5 x 6 minute frames with H-alpha filter, median combined. Colour normal RGB each 2 x 6 minute frames averaged. No darks. Processed with Maxim DL, Photoshop and Neat Image. This image was used as the front cover for the January-March 2005 issue of the SPA magazine, and (monochrome) in the July-September 2006 issue Full Size (576 KB) |
|
Following the capture of the above the sky was still clear, so I revisited vdB142, the peculiar 'Elephant's Trunk' nebula, part of the larger IC1396 cluster and nebulosity in Cepheus. (Imaged in 2021 here). Artemis 285, TMB105 refractor. Luminance 7 x 10 minute frames with H-alpha filter, median combined. Colour normal RGB each 3x 3 minute frames medianed. No darks. Processed with Maxim DL, Photoshop and Neat Image. |
A couple of years ago I imaged Messier 31 - the Great Andromeda Galaxy from Dalby Forest in Yorkshire (Here). Time for a re visit with the Artemis! And despite dire warnings of gales and blizzards, the night of 24th. November was crystal clear and quite still. Artemis 285 with 135 mm camera lens. All frames 5 minutes. |
|
An attractive galaxy cluster is situated in Leo along a section of the 'Sickle', half way between Gamma (Algieba) and Zeta Leonis. It includes (top down in this image) NGCs 3193, 3187 (barred), 3190 and near the bottom, 3185. None brighter than 10th magnitude, 3187 being 12.9. The image required substantial processing to obtain sufficient contrast against a rather 'furry' sky in the early hours of December 13th. 2005. But pleasing, and much better than earlier efforts (see MX716 page) Luminance 9 x 4 minutes, RGB each 3 x 2 minutes binned 2x2. Artemis 285 with Mirage 8 at f6.3 The group is also known as Hickson 44 and Arp 316. There is a superb image of the upper three of the group, taken with seriously high end equipment from a desert site, here. |
|