Friday, 30 October 2009

Some more Moon, some with a difference

Moon and a rose

A Misty moon

And the moon from last night, 450d, 2xtc, C80ED on a camera tripod

And lifting the colour

Wednesday, 28 October 2009

More Cloudy Moon, Jupiter and greenery

A couple more from last night

I've entered these two, and the previous one like this into the Galilean nights comp. Along with a coloured moon, a daylight moon and my M45 image.

Tuesday, 27 October 2009

Some Moon and updates

Firstly, a tweak on M31... using highlights/shadows... and a couple of other minor adjustments

I managed to get a shot of the moon early on sunday, using the 450d, 2xTC, C80Ed on a camera tripod.

and lifted out the colour

I managed to get setup on sunday night... the sky looked clear. PA'ed aligned, got the camera rotation sorted, started guiding and set the camera running. Checking after 10 minutes, and a big wadge of cloud was moving across, not interfering at that point, but I knew a third sub was out of the question. I stopped after 2 and waited, watching, to see if the clouds would clear.. well after 30 minutes no change, I cleared up. Of course an hour later and clear again... typical...

Anyway, 2 more subs added to my M45 data

I think, to get anymore out of that, I'd need to get double the subs... to be honest, I'm not sure I'm going to this year... it might be time to go after another target.. M33 seems a good bet...

Then last night, before the clouds set in, I saw the moon and jupiter and got this shot

Yes, the moon is a little blown, but it's got the trees in shot nicely and Jupiter is clear... The clouds set in with a vengeance soon after that.

Sunday, 18 October 2009

M31 - 7.5 Hours

Whilst the data was being captured for my M31 image. I spotted Orion and grabbed the 15x70's for a quick look. M42 and M43 were clear, and I could see the wings of M42 stretching off to either side, I even spotted where the running man is (even if I couldn't see the Neb itself)... and had a quick wander around the area.

I also saw my fourth (or should that be fifth, if you include the Earth) planet of the night... Mars was up (below Gemini)...

Anyway onto the image... I lost about an hours worth of capture time when my secondary camera battery ran out, and I hadn't realised... ho hum. After stacking... it took a fair while... with 76 lights and 33 flats, I didn't take darks, or add bias frames...

And processing and some cosmetic tweaking in PS I ended up with

I'm really happy with that result... although I'm sure another 2 or 3 hours of capture time would finish it off nicely.

I found another planet ...

At least I think I did... but I'm getting ahead of myself..

I setup the rig, and set that going... more M31 data... then, after a quick check on Stellarium, grabbed the 15x70's on my tripod and went a hunting..

I started with Jupiter, then on to Neptune... Not unsurprisingly in exactly the same place (or at least that I could tell at this low power :D). Then using Starwalk on my ipod... red screened and auto lock turned off... I went a-hunting along the plane of the eliptic.

Thankfully, using Starwalk, I found some very nice little pointers... a triangle of stars pointing straight at it, and a few forming lines either side... and after looking, and checking, confirm, and look and check... I'm sure I found it... looking just like a star... but if I'm correct... my 8th planet... Uranus..


During one of the look away, check and look back, I caught a glimpse of something bright, fast and fiery shoot overhead North to South.

I then went and had a look at tonights imaging target, I'm sure I could just about make out M31 unaided tonightm but getting the bins on it, and the shape was clear... the bright core elongating out into an oval.

I spent some 10 minutes, hunting from there for M33, but no luck again tonight... a tough needle to find in that haystack... and starwalk really wasn't of any real use... I'm sure I was pointing the bins to the right patch of sky... ah well...

I spotted Auriga over the neighbours house and went looking for clusters... I firstly found Mr Smiley and the little fish nearby, then studied where his right ear would be, and yep... there's the first one... M38... A little way lower than this and I found M37.

By this point, thanks to spending so long craning my neck to try and find M33, and the cold seeping in through me fleece, I went in for a cuppa and to warm up.

Hmmm... I enjoyed that session too... Even better knowing that I'm imaging whilst observing too..

Friday, 16 October 2009


I had a bash at reprocessing my M45 data during the clouds... been plenty of those this week...

It's getting there, but there's still quite a lot of noise in the image. I really need more subs to add in, and I think this is as far as I can take my existing data. Hopefully soon... I really want at least another 4 hours to add to this...

20 minutes between the clouds.

At 9 it was cloudy...
At 10 it was clear... but a quick check around showed clouds on west and northern horizons, at least what I can see of them. I wanted to get the rig out for some more time on M31 and M45 but with those clouds... no point... So I set the 15x70's on the tripod and stepped out for a whirlwind style wander around the sky...

First off Jupiter.. Riding high, with a trail of three moons down to the left, although, checking the charts... it was actually all 4 but the 15x70's couldn't seperate 2 of them.. Io in close, Europa and Ganymede, appearing to be one and Callisto way out... A very pretty, the king with his train of servants...

Anyway, using Stellarium, I went looking for Neptune... I found the 3 stars in a line, a quick double cross check (that's looking at 2 sources, rather than a double cross...) and there it was... Netpune... yay... Another planet on the list... Only one left to find.. I had a look around in Capricorn for the other M's but I couldn't find them.

So instead, I turned around and went to remind myself what some of the other sights looked like, that I haven't looked at in a long time... First up... gotta be M31... very clear, a bright core and a faint wisp/hint of something around the core... although my mind might be filling in the blanks for me... I had a good look for M33 too, but again, couldn't find it. Perhaps I should've referred to a book, but as I didn't have one with me ...

I thought to myself, that one of my favourite, yet really odd sights would be very clear now. And it was... Kembles cascade, a line of about 20 stars leading into an open cluster, NGC 1502. Lovely... (it's easy to find... follow the top of Cassie sort of straight down, alongside Perseus, about double the distance of the width of the top of the W).

Then onto the Double... A wonderful sight, but Bins really do bring this out nicely... I swear I could see some reds in the stars... I don't think that's due to odd reflections from my red head torch either... it was only 3 or 4 stars showing it... From there down to Mirfak and the Association... I previously would centre on Mirfak, but I discovered tonight how much I'd been missing... By putting Mirfak to the upper edge of the FOV, I found so many more stars than before... WOW!!!..

From there I hopped across to M34... another one I found easily... nowhere near as impressive as the double, but still a lovely little cluster. Back down into Auriga... I didn't fine the M's but the conditions were deteriorating, but I did find Mr Smiley and the Little Fish. Back up to Cassie (just sort of meandering) there are so many stars, but I found M103... Then NGC457, The Owl cluster. I swung around a little, hopped up from the pan of the dipper, and found M81 and M82... A pair of very faint smudges in the bins... Glad I found them though, I normally have a lot of difficulty doing that.

Then I turned around, found the coathanger... had a quick nose at Lyra... although 15x70's don't reveal very much and drifted up the Milky Way...

That's when the clouds really started making their presence felt (I'd worked around them till then) and gave up and came in...

Only 20 minutes, but well spent and I enjoyed it. I hope to have many evenings with the 15x70s gadding about, whilst the rig is running.

Thursday, 15 October 2009

Another clear night

Although I was unable to start early, I was able to get straight onto more data on m45. But only a couple of hours, then the power ran out...

Anyway, stack and process, I ended up with

The colour is better, but I've over done something in the processing... not sure what exactly, and I'm not sure I'm going to go back and reprocess at this point, as I want to get even more time on it, I know there is faint stuff lurking in there, just out of reach... I may have to push the exposures even longer.

I had another bash at the M31 data, and I think I've processed this better... although again, more data won't hurt

Monday, 12 October 2009

More M31 and some M45

Another clear night last night.. this can't be right, that's two in under a week. Not that I'm complaining of course. Anyway, I carted the gear out for another session, aiming to capture more data on M31. A quick level and PA, hook up the wires, 3 star align, goto M31 and I'm off. I managed to capture 20 more 6 minute subs by which point the camera was looking worryingly close to the leg. I did consider flipping over and carrying on, but M45 was clear, high in the sky, so I thought I'd have a go at that too.

Anyway... After a stack (adding in the second nights data) to give 37x6 mins

I'm not sure I quite nailed the processing, it needs a little more work, although more data won't hurt...

Here's the stack of M45, only got 11 frames

This needs more data, but it's clear that 6 minutes is a good frame length for the whispy stuff, but I might go longer..

Sunday, 11 October 2009

A general update

It's been a while since I've had an opportunity to post, so this is going to cover a few items.

So firstly, There was a close conjunction of Jupiter and the moon, so I grabbed a shot at 250mm

And just to check I could still do it, a handheld 250mm shot of the moon

Over the course of the last couple of weeks, I've been able to grab a few shots of the moon with the 450d, a 2xTC, the C80ED and my camera tripod

and in colour, testing out some of the features of Aperture, I think this is possibly my best to date

One on a misty night, the mist processes out nicely with a wallop of contrast

but here's the unprocessed version

And then, a lovely moon against the daytime sky

I was also able to get out for a little webcam action in between the clouds one night. Thankfully, the Skymax SLT combo, is small, lightweight and very easy to setup, as this means it can be done very quickly without any need to see Polaris.

These are not great, but if I remember correctly, the clouds were being a pain. I'm also at about the limit of my little webcam, I'm not sure what to do really, I'd like an imaging source cam, but that's not going to happen at the moment..

I don't know why, but I really rather like this area of the moon.

I also had a short visual session with my youngest one evening, before the clouds moved in. Jupiter was low in the sky, but we'd been talking about it, why the moon and Jupiter were lit when we had night time, and that you could see the main bands quite easily. So I got the C80ED setup on my camera tripod on the driveway and we had a good look at Jupiter and the moon with my 5mm Hyperion. The bands on Jupiter were clear and three moons were visibly. I did try pushing the power up with a barlow, but the seeing, and the lowness meant it was way too much power. But never mind. With the simple expedient of drawing a line on the drawtube with a pencil, putting the scope back into focus for the SLR was a doddle, and in fact, it turns out that the Hyperion with diagonal is almost parfocal with the SLR and 2" extension tube.

And finally, we had a clear night, decently clear too, so that I could see the milky way unaided. I couldn't quite make out M31. So I carted out the rig for a run on M31. Everything started well, level and PA'ed easily. A quick check of focus and all good. Manually set to M31, but not on the chip... I decided I couldn't be bothered trying to work it out (what with lights still being on in the house, so setup CdC and ran a 3 star align. The first problem hit me... The joystick on the gamepad only worked on one axis... Gonna have to see if I can fix that. Using the touchpad on the laptop for fine adjustments is a real pain. Still after a few minutes, all aligned, so slew to M31. Plonked almost in the centre of the viewfinder, so a quick ISO1600, 60s test frame to check, and I set PHD off to work. Using a 1 sec loop was more than enough to locate a guide star, in fact, I could see the core of M31 on the screen. Anyway, guiding off and running, I setup to take a sequence of 6 minute exposures. I opted to use ISO400 as an experiment, and to see if the higher dynamic range of the sensor would make any difference, it did, but more on that shortly.

After a while, and a check on power, I realised the battery on the lappy was going to run out, way before my powertank... that's a first, I'm not sure why, but my powertank now seems to be working better. I really do have to sort out mains power, but I want to get a large plastic container big enough to house the lappy and keep the dew off, although the simple expedient of hanging a tea towel over the LCD worked a treat on this occasion.

Then I hit my next issue. Whilst taking flats, the CLS is making for much longer flats, the CLS clip filter, decided it didn't want to clip anymore, and I heard it fall down inside the OTA, bouncing on the baffles as it went. All I can see is it's a good job the baffles were there, as they prevented the filter smacking into the back of the objective. Of course, with the clip filter no longer in the camera, there was no point trying to capture any more flats, if I tried to put the filter back, the orientation would be different. I removed the camera, and capped it, popped the rear cap on the OTA, and carefully pointed the lens at the Zenith... the filter fell back on the soft plastic of the rear cap, undamaged... phew...

Then after clearing up, I downloaded the images, and set to work on processing. Then the problems really began. I kept getting a weird grid showing through the image. First stack was Lights and Flats, as I've done for the other images. Obviously something was going on, so I put my Bias master frame in, still there.. Odd... I setup the camera in the garage and took a sequence of darks, still there. Each occasion, involved two attempts at processing post stack. In the end, I took the final stack, and tried to be as gentle as possible, yet push the data as far as I could (all good processing experience) and I managed to not bring the grid out. The noise was astonishing, given that ISO400 should induce less noise in the subs. I can only conclude that whilst ISO400 is less noisy in capture, the lower amplification of the signal in camera meant that to get the data out required far harder stretching, and I know from ordinary underexposed captures, this shows a lot more noise in the shadows...

After that experiment, I'm going to go back to using ISO800 and stay there. The noise and image is easier to deal with... Anyway, here's the end result.

Now, I want to get more data on this one, another night at ISO800 should do it... Then onto M33, and after that M45... I want to get the Merope Nebula.