Archive for the “Sky 90 and SXVF-M26C” Category

Images taken with the 10-Megapixel Starlight Xpress M26C one-shot colour CCD and the Sky 90 refractor.

I managed to get 4-hours worth of 10-minute subs on La Superba last night using the mini-WASP array.  I composited this with around another 4-hours of data from a Sky 90/M25C combo – so around 8-hours in total using 10-minutes subs on La Superba and friends.  I consider this one now done :)

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I had one hour last night to get a 2-framer of the Merak region before thick heavy cloud came over.  As it was, many of these subs were taken through thin high cloud which put a great glow around Merak.  Merak is the brightest star and to the right we have the Broken Engagement Ring.  To the lower left we have Messier 108 and Messier 97 (The Owl nebula) – in the background there are dozens of faint fuzzies.  Only 18 subs at 4-minutes per sub for each frame using all 3 scopes and cameras – so managed the job in the hour, and got a half reasonable image at the end of it which was very surprising :)

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Last night I managed to get another 11 x 20-minute subs on this region to go with the 7 x 20-minute subs I got a few days ago.  This shows Coddington’s nebula – which is actually an irregular galaxy – and towards the bottom left is a large red Carbon star V Y Ursae Majoris.  The star’s name gives it away, these are to be found in Ursa Major.  Blazing Moon last night didn’t help with trying to improve the dataset – but even so there are traces of the Integrated Flux Nebula coming through which is to be expected as it is pretty dense in this region (close to M81 & M82).

 

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Here is second light for the 3 x Sky 90 mini-WASP parallel imaging array.  This is open cluster NGC7789 near Caph in Cassiopeia.

The image is 18 x 15-minute subs or a total data time of 4 and a half hours with only 1 and a half hours of actual imaging time.

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On the evening of the 27th October 2014 I spent the first two hours of darkness aligning the 3 Sky 90s to look at the same region of sky, and then focus training Sky 90(2) and Sky 90(3).

After the initial set up (a little more still needs to be done to get the chips on cameras 2 & 3 nicely flat) I managed to get some imaging done.

Due to its position in the sky, the Tarazed region was looking pretty good so I grabbed 15 x 15-minute subs on Tarazed and Barnard’s “E”.  Below is the result.  75-minutes of real imaging time or 3 hours and 45-minutes of effective imaging time.

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The 3rd (and final) Sky 90 has been fitted to the mini-WASP array :)
I will now be able to get 12-hours of data at f#4.5 in a typical 4-hour imaging session.

Provided that I get 4-hours of clear Moonless skies of course.  Certainly won’t be tonight.

 

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There are 5 very nice Carbon stars in Andromeda that I would like to bag this month and this is the first I’ve caught – UY Andromedae with some nice faint fuzzies, and a couple of not so faint fuzzies.  Nice area of Andromeda, worth visiting with a decent telescope for a browse around.

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The mini-WASP array was again put into commission taking half hour subs of the Navi region of Cassiopeia – Navi is the central star in this image.  Nearby lies Gamma Cassiopeiae and its associated nebulosity.

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Several hour’s worth of half hour subs resulted in this deep view of the PacMan nebula and nearby bright star Schedar in Cassiopeia courtesy of the mini-WASP array.

The array is due for an upgrade at the end of this week with the addition of a 3rd Sky 90 refractor :)

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I recently discovered that Takahashi have discontinued making the Sky 90 – mad decision IMO.  And this comes at a time when I was looking to replace the TS80 with a Sky 90 giving me a mini-WASP array with 3 x Sky 90 refractors and a 200mm lens – all with M26C OSC CCD cameras.  By sheer coincidence an astronomer colleague found himself with a mint Sky 90 (collimatable version!!) for sale.  Needless to say I have bought this together with the camera angle adjuster and the f#4.5 reducer corrector.

So the new mini-WASP configuration will be 3 x Sky 90 refractors and a Canon 200mm lens for imaging, and a Megrez 80mm guide scope.

I have this terrible niggle to put a 4th Sky 90 in the frame and use off axis guiding on one of the Sky 9os, but I know that I will become severely cheesed off with the limitations that this sort of guiding will bring.  So at all costs I must resist!!

The new Sky 90 has come along just in time for the longer nights and all the Winter goodies – now all we need are the clear Moonless skies – something that was totally missing last Winter :(

 

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