Do I make imaging mistakes? Yes – here’s a really good example!

A couple of nights ago conditions were perfect for imaging – freezing cold, crystal clear, and no Moon to worry about.  Excellent!  I am going to get a ton of data on little NGC1333 in Perseus.  I do a two-star align on Capella and Aldebaran (close together so I don’t spend too much time on aligning) – focus up using the robofocus and off it goes, imaging away for 5 hours – brilliant!  Next morning I check the data.  No NGC1333 in the frame, in fact very little apart from stars, and an uninteresting star field at that, in the frame.  By being lazy in the 2-star align the goto was actually way out, so I managed to end up in a region of Perseus with very little in it.  I was around 0.1 degrees out in RA (which is recoverable) but 1.5 degrees out in DEC (which is not).  5 hours of perfect imaging time down the drain.  Merry Christmas!

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The pinhole camera project 7th September to 17th December 2009

I opened up the pinhole cameras a couple of days early just in case they were set in the wrong position, and also to check if the wettest November on record had made its mark.  One pinhole camera unfortunately DID let in some water (not surprising really) – but the other pinhole camera was bone dry (and that was surprising!).  The view is towards the south, so the pinhole camera is imaging the Sun’s path across my southern horizon.  Breaks in the path are due to cloud – and you can see there are quite a few days where we didn’t see the Sun at all.

I spent quite some time trying to work out what that object is at the middle/bottom.  Shows you how slow I am – that is my fibreglass (observatory) dome!  The bright bits are the hinges/locks on the door.

Well – not a resounding success, but also not too bad for a first try.  I will attempt to do better next time.

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Just 4 days to go! The pinhole camera Solstice project

On Sunday 20th December 2009 I will open up the two pinhole cameras on my south-facing wall, remove the exposed film, and replace with two new sheets of film.  I will then leave the cameras open from 21st December 2009 until 21st June 2010 – that is from the winter Solstice until the summer Solstice.  So this coming Sunday we will see if the pinhole camera project has been a success – or not!

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Be warned! ATI Radeon HD5770 graphics card.

Terry Pratchett only had 6 monitors fitted to his computer as he couldn’t get 8 on his desk 🙂  O.K. well I didn’t want 8 or even 6 monitors – I only wanted 3.  Looking at the graphics cards offered by ATI there are a few which state that they will support 3 monitors – however, look at the small print right down at the bottom of the page.  The card as supplied will only actually support 2 monitors – if you wish to run a third monitor you need to purchase a separate active displayport adapter which goes in-line between the monitor and the graphics card.  Now here comes the good bit – it doesn’t look like you can actually get one of these in the U.K. right now, so as you can guess I am well and truly pleased.  If the main spec on a graphics card says that it will support 3 monitors I expect it to do just that – I don’t expect there to be fine print at the bottom  of the page saying only if you have a displayport adapter – being generous this is at the very least misleading.  So there you have it, you have been warned.  By the way, you can by an Accell active displayport adapter on Amazon.com (States) but they won’t ship to the U.K.  So if you find yourself going down this route too, E-mail a mate that lives in the States and see if they will buy and ship you one over.  I am highly unimpressed with this state of affairs, and congratulations to ATI, this is the first time I’ve felt “stung” in buying any computer component in 20 years – usually I am highly impressed at the value for money offered by most companies.

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Geminids from the New Forest Observatory – 13th December 2009

Poor weather conditions (high cloud/fog/mist) sub-zero temperatures and a very unimpressive display of Geminids this year – even though we were blessed with NO MOON!!!  Set up the Canon 40D with a 17-55mm zoom lens set to 30mm, 2-minute subs, f#3.5, ISO 400.  Just set the remote timer off and left it running until the batteries ran out.  Managed to capture 2 Geminids on a total of 54 frames.  In the image the two bright stars are of course Castor and Pollux in the constellation Gemini.  This image should also make an appearance as the weather picture on tonight’s Meridian Weather report around 6:00 p.m.

By the way – the zoom lens gives terrible star shapes in the far corners and I will be looking at short focal length prime lenses to do this sort of work in the future.

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A Festive deep-sky image for IYA2009

With Christmas rapidly approaching, and the International Year of Astronomy rapidly drawing to an end,  I thought it appropriate to post a Festive deep-sky image.  This is the Christmas Tree cluster (NGC 2264, 2,500 light years away in the constellation Monoceros) and the Cone nebula   These objects can be seen rising from the SE around 10:00 p.m. (just now) and moving across the southern part of the sky during the course of the evening.

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Geminids tonight!

There’s plenty of clouds at the moment 🙁 but I’m hoping for just a few gaps in the cloud tonight.  No Moon – and it should be the peak in the Geminid meteor shower (13th – 14th December 2009).  Went out for a bit of practice last night with the 40D piggy-backed on the C11 – just as well really as every picture was out of focus!  I know how to sort that particular problem out tonight – if it decides to clear.  Rather than squinting at the little dim LCD on the back of the 40D I shall hook up the laptop in “Remote Shooting” mode and use the Remote Liveview plus the magnifier to carefully focus (also through the laptop so no fumbly paws trying to do the job) the 40D.  When satisfied with the focus flick the switch from autofocus to manual (so things don’t change) and trigger the remote timer to take the frames.  It’s as much of a pallava as doing “real” deep-sky imaging with the main scope.  Please let’s have at least a couple of clear hours and plenty of meteors tonight – pretty please 🙂

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M34 and planetary nebula Abell 4 in the constellation Perseus

Unbelievably I managed to get some imaging done on the night of Thursday December 10th 2009 – the last image I took was on October 25th 2009!  Got 4-hours worth of 4-minute subs on the nice little open cluster in the constellation Perseus.  High cloud/fog/mist all night but it didn’t seem to affect the imaging too badly:

I cropped out the tiny little planetary (I had no idea it was Abell 4 until told by people on the ODS and PAIG forums – thanks guys, I’m well-impressed!)

And I grabbed a DSS image of the object from Aladin just to check it really is Abell 4 – which of course it is 🙂

no images were found

Unbelievably it is clear again tonight (well bar the high cloud/mist/fog) so I’ve been imaging since 6:20 p.m.  We’ll see if I manage to actually get something useful tomorrow.

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Inner space – again!

Well as the weather is not allowing me to take outer-space images, it’s back to some inner space work again.  This time an opalescent beetle leg gets photomicrographed using a 23-frame focus stack put together using the Helicon Focus software.  SEM-like depth of field, but in full colour!

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The Golden Ratio and living systems:

The Golden Ratio (and the closely associated Fibonacci series) makes many appearances in the “living world” – here’s my question – not including Mathematics and man-made objects, does the Golden Ratio appear naturally in any inorganic systems?  There is a link between quasicrystals and the Golden Ratio, but I’m looking for a more direct link than these.  Once again, does anyone out there know of a clear example of the Golden Ratio making an appearance in a non-organic system?  If you do – please let me know ASAP 🙂

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