Browsing Archive: January, 2009

Comet 144P Kushida in Taurus

Posted by Mark Ashley on Saturday, January 31, 2009, In : Asteroids & Comets 
At the start of the year, Comet 144P Kushida had just glided eastwards from Aries into Taurus. At magnitude 10.7 and no discernible tail, it glows eerily to the north west of the mag 7.4 star GSC 1234-545, which by comparisonshines brightly towards the bottom of the picture.



This picture 'freezes' the motion of the comet against the background stars by using some image processing trickery. First of all I used AstroArt to stack the images in AstroArt so as to correlate the stars, which results ...
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Pristine craters Messier and Messier A

Posted by Mark Ashley on Friday, January 30, 2009, In : Lunar 
Lying within Mare Fedunditatis (Sea of Fertility), the two craters Messier and Messier A can be seen at the centre of this image (Messier is the left one). Taken around midnight on 13th January 2009, with the moon around 16 days old, the characteristic ejecta plume shows well emanating towards the south west of the pair.

They are referred to as pristine craters because they exhibit none of the usual signs of deterioration, such as slumping crater walls, other crater impacts or basaltic lava fl...
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Saturn edge-on in the Winter Sky

Posted by Mark Ashley on Wednesday, January 21, 2009, In : Solar system 
If you look towards the east late at night at the moment you'll see Leo rising with Saturn some 10° below Leo's hindquarters. Around magnitude 0.8, Saturn is nowhere near its brightest, all because the rings are presented almost edge on to us. Twice every 29.5 years Saturn's rings appear edge on to the Earth due to the inclination of Saturn's orbit relative to the Earth. On 13th January I caught my first images of Saturn this season, combining some short exposure sequences of the planet with...
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Near and far

Posted by Mark Ashley on Saturday, January 10, 2009, In : Miscellaneous 

My main interests in astro-imaging are deep-sky objects, particularly galaxies. You obviously need a dark sky for this, and the moon is usually a nuisance to me. However, with the moon high in the sky on these recent freezing nights, I felt the urge do some lunar imaging. I've not used my webcam for some months now, and with Saturn also rising earlier each night, I decided it was high time to dust off the webcam (an old Philips ToUcam Pro).

Yesterday (the 9th January) around 4pm but already -2...


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New supernova SN2008in explodes in M61

Posted by Mark Ashley on Saturday, January 3, 2009, In : Unusual targets 
Supernova 2008in was discovered on 26th December by Koichi Itagaki in the spiral galaxy M61 in Virgo. It is a type IIP supernova. Type II supernovae are formed from the core-collapse and explosion of massive stars (i.e. greater than 9 solar masses). Type IIP are designated as such because they reach maximum brightness, dim slightly, and then stay at almost the same brightness "plateau" for many days before fading (hence the name type IIP, i.e. II-Plateau). Other type II supernovae reach maxim...
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Mirach's Ghost

Posted by Mark Ashley on Thursday, January 1, 2009, In : Galaxies 
Most evenings when I start my imaging session, my set-up process involves selecting a bright star in my planetarium programme (Cartes du Ciel), slewing the scope to the star, ensuring it is centred and then 'syncing' the scope. The other evening, I subconsciously selected a star in Andromeda high in the south and started the guide camera. With the star bright and dead centre, I noticed a faint smudge some 7' north west in the autoguider window.

A quick glance at Cartes du Ciel and I saw I'd se...
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Projects for 2009

Posted by Mark Ashley on Thursday, January 1, 2009, In : Miscellaneous 
It was a cold but dull New Year's Eve, no chance of leaving my equipment imaging whilst we partied. So what do I want to have achieved this time next year? After a bit of thought, here's a list of 10 projects for 2009. Let's see how many I complete over the coming months. Happy New Year!

1. Capture Saturn's rings edge on

I've been constructing a montage of Saturn over the last few years as the rings close. In 2009 the rings finally close and I can add to that montage. In addition, as Saturn is ...

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About Me


Mark Ashley Avid amateur astro-imager and sportsman. I own an 8" Meade LX90 housed in a modest roll-off roof observatory in rural Dorset in the south-west of England. I've been astro-imaging since 2004 and particularly enjoy imaging galaxies.

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