Mike JW

Bill - great that the weather cleared for you to give the JWST a go.  A much smoother movement than my attempt.

Mike

Hi Keith

I am someone who failed A-Level maths and struggled with O-Level maths and then whilst doing my Biology Degree I had to go on a special maths course to enable me to somehow cope with Population Statistics - never did understand what I was doing!!!

Anyway, here goes.......

1st image at 21.02.31. Last image at 21.20.16. (17 minutes and 45 seconds)

Pixel count is 31.

Pixel size: I came across this formula 206.265 x (camera pixel size) x focal length. I use a focal reducer on my set up so focal length is not likely to be that accurate. Plugging in the data and I get a figure of 0.9899482 arcsecs for each pixel.

How far did I move?  My latitude is 51.3270 N. (height above sea level of 50m). The earth spins at the equator - 1037.69mph. Using cos (latitude) x 1037.69 I calculate that I was moving at 489 mph.

Is this all the info you need?  I will be staggered if the final answer is anywhere near the actual figure. Fun hunting out this info.

Thanks,

Mike

32 minutes ago, AstroKeith said:

Mike's images should be able to do the same, just need the pixel scale and time of first and last image.

I have the time of the first and last image. What is pixel scale? how do I find that out?

Mike

Thanks every one for the feedback, contributions and the obvious enthusiasm for this observation. Made for a nice change to my galaxy hunting (which I also did last night as well as some visual observing of double stars).

Mike

45 minutes ago, Martin Meredith said:

That's really marvellous, Mike. I'd like to do this myself if it ever clears over here...

Did you try making a GIF of the subs (as opposed to the evolving stack)? The movement ought to appear smoother.

Martin

Hi Martin,

I did a gif of the evolving stack, hence the continuous track of the JWST.  One reason why the movement is jerky could be because so many subs were dumped so the time frame could be 5 secs intervals or in some cases 20sec interval. The wind kept rocking the scope and being so low down there was quite a lot of star wobble.

Here is the gif of the subs

Mike

Last night I actually had clear skies - cold and dry.

The main aim was to track down the JWST as it steadily heads out to its orbital position. It is in Monoceros at around the mag 13 mark.

Image below - it is there!!!! but how could I be sure? I knew I was spot on with the RA/DEC

Image below.

Patiently watching - yep it is there or is it?

Hooray - there it is - so pleased to have got it

The info says 70 x 5sec subs. I actually took sequence of about 120 subs and then selected the best ones.

At the time JWST was 574,000 miles away and travelling at about 360 mph (I think). (just checked my sums and it nearer to 1100mph - thanks Stu - see below)

Below is a gif file to show how the JWST was moving

Mike

A great start to your EEVA journey.

Mike

Hi Martin,

Great to see these guys in colour. Makes the viewing so much more interesting.

Here is my NGC 6765, which adds nothing to your view - colour wins.

Mike

Fascinating observation and web link. I will put it onto my list but fear with this on going poor weather I will have to wait until Cygnus reappears in the east.

Mike

Hi Tony,

Glad you have discovered the pleasure of taking a look at the WBL groups. Martin first got me into those when he first posted a few and then we set up the WBL thread. Looks like you are hooked with the wide fov of your set up. By the way you may have also picked up your first ring galaxy - NGC 2290 which is a galaxy with an outer ring.

Below is the link to WBL 126 in the WBL thread

Sometime I must re-visit this area and get a better shot of NGC 2290 to add to my Ring Galaxy collection.

Thanks for posting such a good shot.

Have fun,

Mike

Ice on the scope at 4.30am this morning.

First up was Leonard - low in Bootes

Then I wandered up into CVn to pick up C/2020 V2 (ZTF) - it is the fuzz ball to the right of NGC 4914

and finally over to 67P in Cancer

Mike

Thank you so much for doing this. Here in the UK I was clouded out.

Mike

Always amazed by what you achieve and the quality of the view.

Mike

Here is Pal 2 in the Globular Feast post 

https://stargazerslounge.com/topic/354766-a-globular-feast/page/2/#comment-4162083

Mike

Excellent.  The Wanderer is framed so well with the nearby stars. The line of stars near to the galaxy pair in the IC 289 is freaky. Love the  Perseus shots.

Mike

Hi Tony, wonderful wide field shot.

I always enjoy a visit this Arp - classified by Arp as a chain of galaxies but how many in the chain? He listed 8 in the chain from NGC 384 to NGC 379 but some folk think he also included 373, 375 and 388. Below is my shot of the main chain of 8 - rather much drift as evidenced by the black around the main view. This chain is also special because it is a chain of elliptical galaxies.

Mike

Excellent shots and great to have L3 added as well.

Mike

It has been a while since we had a contribution in this thread.

NGC 7800 in Pegasus is one I came across whilst wandering around the area.. It is an irregular magellanic galaxy - Im - dwarf (just 40.000 lyrs across) and messed up (plenty of star formation on the go). It lies about 67 million lyrs away. It is also a low surface brightness galaxy. Only when I was looking around the internet did I come across that I had also captured a tiny edge on galaxy peeking through 7800 on its right side. (Starting at the 'N' of its label, drop down and slightly left to the obvious star, now drop down a similar distance but go right and there it is!)

I labelled up the three PGC galaxies because they are all well over 1 billion lyrs away. Then there is the quasar which is way out there.

Mike

Arp 216 (VV 329) lies in Pisces and the pair lie around the 215 Gyr away. Arp classified them as galaxies (not S or E) with adjacent loops - well, that is me confused. NGC 7882 on the left looks decidedly spiral to me - classified as SB(r)ab SY2. A very obvious bar and the bonus of being a ring galaxy. NGC 7679 on the right is given the SBO pec notation. Certainly it is peculiar (look at high resolution images and you will clearly see 'adjacent loops'. I picked up the one to the left and just a hint of the one that heads up. Some folk suggest these two are interacting but if that is the case then why does NGC 7882 appear intact? Maybe they are not interacting and NGC 7679 has merged with a dwarf galaxy causing the disruption?

The same shot below but with an interesting bit of fuzz labelled as 21.9 - no idea what it is. The two quasars are seriously distant. A 'z 'of 1.4 is around the 7.5 billion lyrs - remarkable.

Mike

Hi Martin,

The brighter blob - upper right does actually have a PGC number. It was still twilight when I started my recent two sessions and finished by 7pm - very civilised. Although I now have Christmas lights adding to the LP from surrounding houses.

Mike

On the same night I visited VV 1977 in Pisces which is a pair in contact - no data found on this one. However the nearby pair of UGC galaxies made for an interesting viewing. They are likely to be companions as they are only about 5 million lyrs apart. Both are spirals. Also note the quasar at the top.

Mike

VV 1947 in Aquarius is also known as IC 5241. It lies about 370 million lyrs away and is obviously messed up, hence the classification of Scd pec. Colour images show much blue suggesting plenty of star formation. The VV classification is 'N' = three or more galaxies and at first glance it would be tempting to agree with this, as there are clear bright nucleus like areas. However these bright spots would appear to be star forming regions. Aladin does show the presence of a second galaxy just north of the main core but not picked up in my shot, but no other galaxies indicated - certainly not the 3+ as suggested by VV

Mike

Hi Tony,

As I have commented previously I think you may have found close to the ultimate set up for EEVA. A great collection of shots, illustrating the power and usefulness of the EEVA technique. I think the Sh 2-131 is particularly good - so much to see and dwell on with that shot. I good idea to post all the shots in one post to show just how comprehensive EEVA can be, but don't forget there are the different threads in the forum to keep targets together such as Arps, Hicksons........

Cloudy again tonight here in E. Anglia but you may  well be clear. Looking forward to your next posts.

Have fun

Mike

Hi Tony, that is a cracking shot and to get three edge on (well nearly edge on) is a dream for me. I normally have to pick them off one at a time. 891 was always a favourite visually with the 20" Dob. Great to see the lumpiness of the dust lane and the way it bends at each end. It seems to me that you have found a set up that is superb for EEVA - wide fov, pinpoint stars and detail in the object of interest - the perfect set up possibly both with scope/hyperstar and the ultrastar - rather envious.

Looking forward to more posts.

Mike

I think the two names refer to the same galaxy.  I put the 2MASX name into Aladin and it came up with the same galaxy - all good fun.

Mike