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Posts Tagged ‘science’

Insomnia – I am making some progress on it, but not much, but when I woke up at 1:30 am this morning I at least could see stars. We have had a pretty steady dose of mostly cloudy, hazy, foggy, partly cloud and heavy rains lately – 7 inches one day, five inches more a few days later and about an  inch yesterday  – so clear skies have been unusual and don’t last long.

These clear skies lasted long enough for me to get the 66mm  WO scope out and after a false start – batteries are weak on the Celestron mount I suspect – I got it on the Desert Sky dual mount/Bogen tripod and had a good time with some old friends.

I actually have a little plan in mind – to establish a list of best objects for popular consumption on any given night – or more accurately, any given sidereal/star time – of the year.  My goal would be for these objects to be nice in any scope, so if they’re nice in the 66mm you can be pretty sure they’ll be nice in anything larger.  The 66mm thus establishes a base line. So my observations were made with this in mind.

Yes, I’m pretty sure I could make such a list from memory – but I would trust it more if I check each object with this in mind.

So – up for starters was, of course, Albireo. It did fine at 16X – was really pristine – but I think the newcomer would appreciate it more at 30X. Once they were certain what they were seeing, they could try backing off some.

I have a soft spot for Albireo, but I closed this session wilth Almach and I have to say that although it was pretty low in the east at this time, I still find its colors richer than Albireo. It does take significantly more power. I found it best at 78x, though it could certainly be split with less.

There’s no contest with the Dragon’s Eyes – they are a perfectly matched pair that’s pretty easy to split in binoculars and certainly split easily at 16X, but seem better framed at 30X.

Meanwhile the Dolphin presents more of a challenge. Gamma Delphini is a sort of pale version of Albireo – in fact I would have a sliding scale of intensity for blue and gold stars where I would rank Almach the most intense, then Albireo, and then Gamma Delphini. Needed about 50X to get a decent split and it was better at 79X.

I liked M13 at all powers from 16X to 79X – but it was best at 79X because at that point I could really see individual stars flashing across the main body of this star ball.

M31 was another object that did fine at all powers, though it was easier to pick out M32 at 79X.

As I think – and write – about this experience I basic process for visitors pops into my mind. I want to start them witht he naked eye view. From there, I’ll move them to low power binoculars on amount – just to let them know what they can expect to see with their own binoculars.  Next up would be the 66mm at 16X and on a tracking mount, tobe followed by the 5-inch SCT on tracking mount a with a 24-8 zoom. Finally they could go in the observatory and use the 8-inch SCT,

Last step? Show them a good image  – probably in the observatory and under red light –  of what they’ve been looking at and encourage them to go back and look again.

And in this process define a “glance” as one minute at the scope – a “look” as three minutes or more.

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My last post here was almost a year ago – what the heck have I been doing?

Well, not much of what I would really call observing, though I had an hour and half this morning that felt right. For one thing for reasons I can’t explain I have been ignoring my best and easiest observing venue – the Observatory. So in thepast week I’ve made up my mind to get back to it.

Hey, the LX-200R is in “park” so all I have to do is open the shutter and turn on the scope. And I did about 2:20 am today and swung it to M11, the Wild Ducks – and found them hiding behind a tree! No problem – I swung over to M27 which I had taken a long look at a couple mornings ago. It was well placed and while the transparency was below par – I coud see a faint Milky Way, but nothing like I would like to – I did get a chance to really use the new (used) set of Meade Ultra-wide eyepieces I have acquired.

First, however, I looked with my inexpensive 30mmOwl “finder” eyepiece. This is an 82 degree AFOV and really quite good – especially considering it costs me $40 on the used market and that included a lens I can screw into it to bring it to 20X. Haven’t tried that yet, but I like it as a constant “finder” eyepiece for this scope and honestly, I don’t see much difference between it and the Meade UW 30mm except that the adjustable eye shield ont he Meade makes it easier for me to use.

I made a sketch – very rough – and a few notes of M27 and M57 observation, plus some notes on the Double Double. I closed up shop at 4 am as it was getting quite light.

Couple things I need to do –

Get oriented. I need to make it second nature what the directions and PA are when using this scope.

Get a better chair – my current stool doesn’t go low enough and it is difficult to observe object as high as M57 was when I was looking at it – 74 degrees – not all that high!

On M27 I noted some key field stars, so I should be able to figure the orientation from that.  I could see one star on the edge of – or just in the Nebulae and I believe from my reading this is a star to the southwest.

Best framing for this object came with the 18mm UWA. In fact, that also provided th ebest framing for M57.

I could just dig out the nearby 12th or 13th mag star on the edge of M57 that I have seen many times. That had to be an indicator of the poor transparency.

With the Double-Double I could split it starting with the 18mm and the 14mm probably gave th ebest split, though it was  hard to choose between that and the view in the 8.8mm.   However, I couldn’t get any of the views to reallys ettle downa nd give me the pristine, round stars I like with the  refractor. Masking the scope – bringing it down to 60mm – did give me nice round stars and again the best split came with the 14mm.  (The mask turns this into an F33 scope! The 14mm means I’m using 143X with a 60mm scope. Fifty times aperture should be the maximum power – about 112X – so I was luck to be getting a decent image with that 14mm.

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After a hiatus of about four years I am back into deep sky video astronomy with both feet. The object of this form of astronomy is to provide live video views at the telescope – under the stars – which show far more detail in faint, distant objects than can be seen visually with the eye at the telescope. The video camera, a special one made by hand in Canada by Rock Mallin, simply slides into the telescope where the eyepiece normally goes.

This is not rocket science, but there are a lot of options, a lot of wires, and some stuff to learn, so at this stage my efforts are crude, but I’m happy with the results. I don’t see this as competing with still imaging where much different cameras are used to take super pictures which are then enhanced the next day in the computer.  What you see here is raw video – what you would see if you stood by the telescope and looked at the video screen. I discussed the reasons for doing this  in detail in a post about six years ago when I first tried deep sky video.

Yeah, Driftway Way Observatory looks a bit techy these days with all the wires and things 😉 That little screen about the size of a deck of cards is the recording device from Orion. It includes a nice monitor which is shown here displaying a menu. The whole thing is small and light enough to ride ont he telescope. (Click image for a larger view.)

Last night I tried for the first time  an Orion StarShoot LCD-DVR recorder – this is a new item – so new the Orion sales and technical folks could not answer my questions a couple weeks ago because they hadn’t seen one yet. So I decided to buy one and give it a try, since Orion has a reasonable return policy. My assessment? Neat. I like it. But then. I’ve only spent an hour with it. However, let’s cut to the chase. Here are most of the recorded videos from last night.

My first stop was M3, a globular cluster , and the different versions of it you see on the followingvideo are due to my playing with the MallinCam controls -sometimes taking very short exposures, sometimes longer ones. Also, the  drives on the LX-200R hadn’t really settled down yet, so you don’t get a satisfying – to me – view until the end of this brief clip.

About viewing these clips –

1. Enlarge to full screen if possible by clicking box in lower left.

2. Don’t treat like a normal video – there is no relevant sound and there is virtually no action. When you see something you like, pause and view as a still image.

3. Make liberal use of the slider beneath the video to jump from one section of the video to another.

Colliding galaxies

This next one is of one of my favorite galaxies – or rather, colliding galaxies – M51. Though I have viewed this countless times over the past 40 years or more, this is the first time I was really aware that the core of the smaller galaxy is much brighter than the core of the larger one. (I explore just that idea in another video later.)

I jumped from M51 to a much different subject, the Owl Nebulae in Ursa Major – M97.  I have always found this planetary nebular difficult visually, but in the video it’s fairly easy to see how it got its nickname. This won’t be obvious until I increase the exposure in the second half of the video.

From the Owl I went to another difficult, but astounding subject, m101, the great Pinwheel Galaxy just off the Big Dipper’s handle. This is notoriously hard to see visually, but the spiral structure, while subtle is easily seen – especially in the longer exposures near the end of this video.

M81 is best known, perhaps,a s the companion of M82. The two galaxies are fairly near to one another – and to us (11 million light years) and both can be seen int he same binocular field of view. They are quite different. M81 is a bright spiral – however, the spiral structure takes alot of exposure to bring out and only becomes apparent inthe second half of this video.

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