RAG Monthly Meeting 30/11/2018

Thirty folks attended our November meeting of Rosliston Astronomy Group.

Ed gave us an update on the Peter Bokas Observatory build – the wall of the done is about 2/3 if it’s final height and the building is starting to appear!  In another few weeks we will have a completed shell which we will then need to outfit ourselves.

Ed also gave our main talk of the evening on Fractal Cosmology. We have never had a talk on this subject before and he linked the astronomical aspects of fractals to where they are seen elsewhere in nature.

After coffee, Alan and Angela Rodgers talked about weather predictions and equipment – useful for predicting clouds and rain in your garden/observatory location!


Another go at Sadr

Finally got a finished version of last Saturdays subs- I’d left the camera running on Sadr before setting off to meet Neil. I managed to collect 16 ten minute Ha subs (it was a bright moon), along with another 10 of the shed wall whilst the rig was running unsupervised (not included here!). I used them for the B&W image below, then combined them into the red channel of an RGB image from 9th October on the same target (see here for previous effort: https://roslistonastronomy.uk/imaging-sadr-and-observing-the-veil ). My framing was a bit different this time (framing is a bit random at the minute for me- I’ve definitely not got on top of this yet…), so the colour image below is the intersection between the 2.

Adding categories to posts on the RAG Blog (www.roslistonastronomy.uk)

Please could I remind all members that, when adding new posts to the Rosliston Astronomy Group blog, please ensure that you choose at least two categories for the post before you save it.

You should add the following two categories:

The first is your name – choose this from the contributor list – if your name is not there you can add it in the box below the category list.

The second category should be the nature of the content of the blog itself (eg. “Astrophotography – deep sky”) from the choice available in categories. If this is not covered in the categories available please contact me using the RAG contact page on www.roslistonastronomy.org.uk to say what category you need creating.

It is acceptable to add more than one category for the nature of the content of the blog if appropriate to the post.

Please ensure that the category “Uncategorized” is NOT ticked/selected – this will default to being selected if you save a draft of the blog post without choosing categories for it!


The PBO – First few days

Hi Folks,

As you’ve seen from Heather and Andy’s blogs, YES,IT’S ACTUALLY STARTED !!!!

I’ve been taking loads of photos and the timelapse camera seems to be working very well. So far it’s taken about 10000 photos. Of these, obviously only a small proportion are relevant, so if anyone wants 6500 photos of an empty field, let me know. The individual photos are 5MP

I’ve just added a few photos here of the important bit – the pier base. It’s the bit I was sweating about the most. The first pic shows Tim standing in the pier base former. He’s about the same height as me so you can see it’s going to be a fair chunk of concrete. As you can see from the second photo, the ground is anything but level. Three of us did a lot of checking to prove that the rebar skeleton is really vertical. I know it doesn’t look it !!! The land is on about a 7 degree slope in three directions.

The third photo shows the first concrete pour of the base , ready to be topped up when the full column is added. The final floor level is to the top of the plywood

The fourth pic is the completed footings just after the cement had been poured. Don’t worry, it’s not that shape – it’s a panoramic photo

I’ll be doing a full update at the RAG end of month meeting., along with my talk on fractals

I’ve tried to upload a low res version of one day’s timelapse (PBO12Nov_640_480.avi). It’s 29MB so I don’tknow if it will work.

When everything’s done, I’ll get Andy to upload the full version. With just 3 days of the build it’s up to 73MB so far but needs editing etc.