Author Archives: Ed Mann

Message from George – Greek astronomer from Skopelos

Hi Folks

I had a reply from George Mihail that I met in greece. It’s worth having a look at his website. Very interesting setup, a great view. The last photo is the latest live feed from his webcam at 1711 15th september. If you read further down, the english translation of my message is at the bottom

 

I

Dear friend
We manage to communicate and to take pictures of every activity of the stargate we have a very interesting winter here in Skopelos.Thanks with the best wishesGeorge Michail

https://www.facebook.com/george.michail.16

http://volnet.gr/home/index.html

——-Original Message——-

From: ed.mann@btinternet.com

Date: 12/9/2018 9:18:21 μμ

To: george@volnet.gr

Subject: Αστρονομία στη Σκόπελο (Astronomy in Skopelos)

Γεια Σας  Γεώργιος , το όνομά μου είναι Ed, σας μίλησα στη Σκόπελο πριν από λίγες εβδομάδες στο φεστιβάλ. Είμαι ο αστρονόμος από την Αγγλία.

Μου άρεσε να μιλάω μαζί σας και με ενδιέφερε πολύ να μάθω ότι έχετε ένα παρατηρητήριο στο νησί. Θα ήθελα να έρθω και να το δω την επόμενη φορά που θα είμαι εκε

Είμαι μέλος της Ομάδας Αστρονομίας Rosliston που συναντάει κοντά στο Burton on Trent στην Αγγλία (http://www.roslistonastronomy.org.uk/)

Αν κοιτάξετε την Αρχική σελίδα, εγώ είμαι στην πρώτη φωτογραφία (μπλε παλτό) και την 5η φωτογραφία (λευκό πουλόβερ). Μάλλον θα με αναγνωρίσεις από αυτό

Έχω επισυνάψει ορισμένες φωτογραφίες που πήρα. Ήταν τόσο ωραίο να βλέπετε κάποιον άλλον να κάνει δημόσια εκδηλώσεις προβολής. Κάνουμε αρκετά στο κλαμπ μας

Είπα σε άλλα μέλη για το γεγονός της Σκοπέλου και ήταν πολύ ζηλιάρης για το πόσο καθαρός ήταν ο ουρανός

Θα ήταν καλό να μοιράζεστε μαζί σας πληροφορίες και φωτογραφίες, αν θέλετε, και αν έρχεστε ποτέ στο Ηνωμένο Βασίλειο, θα ήσαστε πολύ ευπρόσδεκτοι να έρθετε στις συναντήσεις του συλλόγου μας

Θα σας δούμε το επόμενο έτος το 2019

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

My Greek is not very good so I have written it again in English just in case

Hi George, My name is Ed, I spoke to you in Skopelos a few weeks ago at the festival. I am the astronomer from England

It was great talking to you and I was very interested to know you have an observatory on the island. I woiuld like to come and see it next time I’m there

I’m a member of the Rosliston Astronomy Group that meets near Burton on Trent in the UK   (http://www.roslistonastronomy.org.uk/)

If you look at the Home page, that’s me in the 1st  photo (blue coat) and the 5th photo (white jumper). You’ll probably recognise me from that

I have attached some photos that I took . It was so nice to see someone else doing public outreach events. We do quite a few in our club

I told the other members about the Skopelos event and they were very jealous of how clear the sky was

It would be good to share information and pictures with you if you’d like, and if you ever come to the UK, you’d be very welcome to come to our club meetings

Bye for now

 

Stargazing in Skopelos, Greece in August 2018

Hi folks,

 

We’ve just got back from a holiday in Greece, and as part of a local festival of music, dance and culture, I met a really nice chap George (Giorgiu),who had set up a viewing area for the public to see the Moon (Selene in Greek), Mars (Aris), Jupiter (DIas) and Saturn (Kronos). That’s George checking the view of Saturn in the second photo

He has the first, and only, observatory on the island and it’s in a great location away from the town lights (the lat long coordinates are on the poster in the first picture)

He was interested in what we are doing too so I’ll drop him a line and hopefully get to see his obsy next time

Taken with NightCap. Long Exposure mode, 7.12 second exposure, 1/3s shutter speed.This was the night of the full moon (Sun 26th August 2018). Mars can be seen above the right hand set of masts although the photo doesn’t show very well here and I don’t know how to make it zoomable

Earth shadow

Click on the IMG_8691 link below to see a timelapse video I took in Mauritius recently. You can see the earth shadow creeping up the sky. The sky below the line actually went a beautiful deep blue, which doesn’t really come across in the video

Towards the end of the video, the sun obviously went behind an obstruction and you can see a big shadow being cast on the sky at the top left hand corner of the screen. It was amazing in real life

IMG_8691

The video is in .MOV (Quicktime). If you can’t view it and want it in a different format, let me know

 

Cheers

Total lunacy

HI Folks

I was setting up my (recently repaired and returned) ZWO 174 camera a couple of days ago and I thought I’d have a play at some lunar pictures. Here’s what came out:-

SW 102 + Celestron Neximage clone camera. NIce nearly-full moon

After this I switched over to the 8SE scope + ZWO174 camera and had a look at the crated towards the Southwest edge as they were so prominent. I got a nice one of Phocylides and the surrounding area

Consolation Prize??

 

After finding out the other day that my ZWO 174 camera doesn’t seem to work anymore, I decided to hang my Canon EOD 450D onto the back of my 8″ Celestron SCT to grab some snaps of Orion while the weather was good (yes, that day really did happen!!)

 

I was quite pleased with this one although I can’t remember how to get a resizable image onto the blog

 

My camera’s gone back to 365 Astronomy and they are sending it back to ZWO for replacement (I hope)

 

Cheers

All Sky Camera update – Long exposure/ Frame integration

Hi Folks

I’ve been experimenting with the All Sky camera setup to try and extend the total exposure time for an exposure. One limiting factor is the camera firmware which limits exposure to 1 second.

The way that iSpy gets the images from the camera is using a combination of RTSP (Real Time Streaming Protocol). The command line for that is the funny string of characters you entered when first setting up the camera (rtsp://admin:@192.168.1.253:554/mpeg4)

This is then passed into iSpy via FFMPEG software, which is basically a communications interface. Here’s where I’ve made a discovery. I can change the command line to allow frame integration of 2,4 or 16 frames i.e. 2s, 4s, 16s exposure.

I still have a little more playing about to do before I release the command line but it looks promising. The FFMPEG documentation is a nightmare but it’s incredibly powerful

Watch this space……………….

Be afraid, be very afraid!!! – Baader 8-24 Zoom lens stripdown

Hi folks

Some of you may remember that I picked up a Baader 8-24 zoom lens from Astrofest a couple of years ago for £60. It was complete but the mechanism was a bit crunchy and sticking. Eventually it packed up completely. This left me with two choices, abandon it, or to attempt a very complicated and almost impossible rebuild.

Anyone who knows me would guess that I went for the second option!! So, heart in mouth, I went for it

I would immediately stress that, unless you are very technical, or completely mad (like me), **** DO NOT ATTEMPT THIS ****. There are lots of tiny screws, lenses and spacers and plenty of grease.

The problem I found was that there are three rollers/ guides that run in a helical groove. See the screwhead to the left of the 20 in the first picture. If you look at the second picture you can see there is no roller. The screw of that, and the third roller , had sheared. These screws are tiny M1.8 x 4mm screws.

This is where the fun part/ insanity started, as I had to either extract the sheared screws or drill them out with a 1.3mm drill. It wasn’t possible to extract them so I had do some very nervous and careful drilling. This also involved a complete stripdown to clean everything. I mentioned plenty of grease … it was everywhere!!!

I gave everything a good clean and (eventually) got it all back together, and IT WORKED!! Yayyyy . I now have two working zoom lenses