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Posted by David Strange at 14:52 on 2013 Aug 15
This was the brightest one I recorded at 23:50h UT on August 12th at the NLO:http://www.davidstrange.org.uk/Perseid_fireball_20130812_dgs.gifAlthough there was cloud passing overhead at the time, an enlarged version here clearly shows a circular expanding dusty ring after the explosion:http://www.davidstrange.org.uk/Perseid_fireball_20130812_dgs2.gifThis one popular on twitter! Showing ISS and meteor on a collision course ;)http://www.davidstrange.org.uk/ISS_perseids_nlo_20130812.jpgDavid
Posted by Neil Morrison at 21:48 on 2013 Aug 14
Tuesday 13th August, much poorer observing conditions . Fragmenting low cloud and moderate Haze 6 meteors betwen 21.10 gmt and 23.10 gmt.
Posted by Nick James at 21:13 on 2013 Aug 14
Last night (Aug 13/14) was reasonably clear here with some more persistent drifting cloud. I’ve uploaded my raw video detections here:http://www.nickdjames.com/MeteorCam/2013/20130813/in case anyone wants to search for a common event. I haven’t reviewed these yet so there could be some spurious ones in the list.Weather forecast and at the moment is not good (its raining) so I suspect I’ll get nothing tonight.
Posted by Nick James at 22:51 on 2013 Aug 13
Richard,There are quite a few other bright ones too. Yes, I’m certainly hoping that we have some multiple station captures so that we can do a triangulation.Nick.
Posted by Jeremy at 22:42 on 2013 Aug 13
I caught a few Perseids using my new video detection system the last couple of nights – some in gaps in the clouds. Looking doubtful for tonight. I’ll leaving it running all night again, just in case!Go well!Jeremy
Posted by Richard Miles at 22:33 on 2013 Aug 13
Nick – There’s a nice one on your video camera sequence at 22:23:41 UT. It must have been recorded by other folks.Richard
Posted by Callum Potter at 22:26 on 2013 Aug 13
I saw a few really bright ones last night, and a small number of fainter ones. I did not seem to see as many as others reported…Details and a couple of pics on my blog at http://starlightnights.com/callump/?p=403Cheers, Callum
Posted by Nick James at 22:09 on 2013 Aug 13
James,It was clear in Essex last night from dusk to dawn. My video camera picked up around 100 events. The raw images are here:http://www.nickdjames.com/MeteorCam/2013/20130812/I haven’t had a chance to go through them yet but there are some bright events recorded.I also had a DSLR going through the night and it has picked up a few bright events including this one at 2340.http://www.nickdjames.com/MeteorCam/2013/20130812/DSLR/meteor_20130812_2340_ndj.jpgIt’s patchy cloud here at the moment but the forecast is better for later on.Nick.
Posted by M C Butcher at 11:11 on 2013 Aug 12
The above inquiry was made in late June 2013. With the arrival of slightly darker nights, but whilst M16 was still above the horizon (only 16 degrees above to be fair), I was able on 7/8 August to achieve a passable result. The set up configuration was an unmodified Canon 40D mounted at Prime Focus with a Focal Reducer (f/6.3). The LX-90 was unguided and a total of 7 x 60 sec sub-exposures (ISO 1600) were usable and processed in Images Plus, Noise Ninja and finished off on Photoshop CS5. I was most surprised to achieve a recognisable result with so few sub-exposures taken with an unmodified camera. The results have been forwarded to the Deep Sky Section.Martin Butcher
Posted by Gary Poyner at 13:52 on 2013 Aug 06
Hi Darren,An absolute delight to welcome a new visual observer to the world of Variable Star observing. Ask any question here, or contact one of the officers personally and we’ll be delighted to advise/help. Contact details on the BAAVSS web page.Clear skies,Gary
Posted by Eliot Hall at 18:16 on 2013 Aug 01
Thanks Callum – I couldn’t find that page either.Thanks Richard – I had a feeling you would say that.I’d quite like to stay with Baaders’ if only for the reason that I’m adding to the set I already have.I suppose now all I have to do is save my pennies…
Posted by Richard Miles at 17:47 on 2013 Jul 31
Eliot – Don’t put any other filter like an IR cut-off in front of your V filter.The Astrodon dichroic V filter shouldn’t suffer in damp atmospheres – the problem lies with the Bessell coloured glass version as the BG12 element is hydrolytically unstable. The V filter Norman Walker makes (Nick has referred to this) is an excellent one in that it comprises the standard coloured glass elements sandwiched between 1mm silica plates. I too have one of these as well as the Astrodon dichroic which I have mounted in a Canon 52mm filter holder which drops into a long lens.When I looked on the Baader webpage I couldn’t find the V filter either – Callum’s right though as I have checked out the url he quotes although they are only the 1.25" ones.
Posted by Callum Potter at 12:17 on 2013 Jul 31
Hello Eliot,i’m not an expert on filters for photometry, but I thought that Baader did supply a UBVRI set, and individual filters.You might need to order direct from Germany, but they are listed here:http://www.baader-planetarium.de/sektion/s44/s44.htmpriced EURO 145Hope this helps,Callum
Posted by Eliot Hall at 22:21 on 2013 Jul 30
Thanks for the information.I also have a set of Baader LRGB which I’m very happy with, however unfortunately they don’t do photometric filters. I’m using a Starlight Xpress MX916 which has quite a large chip so I will have to use a 1.25 inch filter.So it’s looking like it’s going to be the Astrodons, and be careful not to get dew on the filter. If I were to use a UV/IR cut filter infront the filter – that should help to protect from moisture and not effect the result or am I being naive?
Posted by Graham Relf at 15:52 on 2013 Jul 30
New comet charts cover to the end of August.Also programs on the Computing Section site are now working again on the new server.britastro.org/computing
Posted by Nick Atkinson at 18:51 on 2013 Jul 29
I use a V filter provided by Stargazer made by Norman Walker tel 01323833753 Email enw@stargazer.fsbusiness.co.uk. His filter screws into the back of my H9 camera. However as far as I know they will not fit into a filter wheel.1.25 filters such as those provided by Astrodon are another option and might be cheaper in the long term if you move on to I and R band. This is dependent on the size of your sensor; the larger chips now more widely available would require the larger filters anyway.I have a starlight Xpress 7 position filter wheel that I use for Red Green and Blue colour imaging. Later on should I move on to I band & R band variable star work I might consider buying from Astrodon. My colour filters are made by Baader. They might be another source to consider but I don’t know if they make any suitable for photometry
Posted by Richard Miles at 18:11 on 2013 Jul 29
Hi Eliot,Good to meet you at the BAA Exhibition in Manchester.There is only one V passband – that corresponding to the Johnson-V one. It is sometimes called the Vj passband.Nowadays you have the choice of having either the coloured glass one, which is a sandwich of discrete elements originally put forward my Mike Bessell, which are cemented together and mimics the original Johnson filter or a ‘dichroic’ version which comprises an optically flat piece of glass onto which very thin films of various thickness/composition are evaporated which then transmits the Johnson passband range.The coloured glass version should be coated to protect it from oxidising/hydrolysing in moist air, or sandwiched between plates of silica glass or the equivalent. As well as Astrodon, I see a company called Horiba Scientific do these:http://www.horiba.com/uk/scientific/products/optical-filters/optical-filters-by-application/optical-filters-astronomy/?gclid=CKnTw96V1bgCFYOWtAod6ngAmwbut careful – they are not protected and the BG12 component will degrade after a few years unless kept dry.US-based Optec Inc. do various V filters but are pricey:http://www.optecinc.com/astronomy/prices/astronomy_price_list.pdfRichard
Posted by Roy Hughes at 09:55 on 2013 Jul 21
The best shots of Jupiter I’ve seen are Damian Peach’s, see BAA [GALLERIES]. Try him, via BAA if all else fails (see [COPYRIGHT]).
Posted by Martin Ratcliffe at 20:13 on 2013 Jul 20
Hi Astrid, are you looking for wide angle shots showing Uranus or Neptune as a dot, or close-up spacecraft or Hubble images. The latter can be found on NASA web sites at http://www.jpl.nasa.gov or http://www.hubblesite.orgRegardsMartin Ratcliffe
