Astronomy, Photography and Weather
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News: IAA lecture programme continues alternate Wednesdays from September - an excellent programme of lectures- Queens University Belfast - Bell Lecture Theatre. Also keep an eye out for the Summer Events
 
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1216  General Category / Weather & Atmospherics / Re: Heavy Rainfall - July 16th on: July 16, 2008, 07:27:39 pm
Well it rained here, moderate for 1/2 hour or so, stopped now but still dull. Forecast is rotten for the next few days, I don't care about a bit of rain but it looks as though the cloud is here until Saturday (at least)  Angry
1217  General Category / Astronomy & Space / Re: NLC Alert - July 15/16th on: July 16, 2008, 02:35:55 pm
[quote ]
Anyone see anything
[/quote]
Yup. Ordinary low level cloud, glowing its usual orange colour. Cloudy nights are for sleeping.

Edit: Pete Lawrence got a good view from Selsey - see http://forum.skyatnightmagazine.com/tm.asp?m=71125&mpage=1&key=&#71125
1218  General Category / Astronomy & Space / Re: C/2006 OF2 Broughton on: July 15, 2008, 03:25:00 pm
Well the ephemeris in the BAA Handbook estimates around 12.0 at the end of June so it's behaving itself. Unfortunately the same ephemeris shows it getting no brighter than 10.8 (in early Nov, when it's in the Camelopardalis area).

The one to look forward to at the end of the year seems to be 85P/Boethin which is predicted to be mag. 7.4 moving North through Aquarius in mid-December.

Of course a really bright comet could appear more or less anywhere at any time ...
1219  General Category / Weather & Atmospherics / Balmy night on: July 14, 2008, 08:35:04 am
Hmmm - overnight min temps here, Jul 12/13 4.9C, Jul 13/14 15.3C. Guess which was the better night for observing, or sleeping!

Previously the highest overnight min this year was 30 Jun/01 Jul, 12.7C.
1220  General Category / Astronomy & Space / Re: C/2008 J1 Boattini on: July 13, 2008, 07:54:13 pm
There's another comet which might be worth a shot at - 6P/d'Arrest is currently moving slowly south through Aquila, excellently placed for observation in a dark sky, brightening (according to the ephemeris) from 11.54 now to 10.65 at the end of the month.
1221  General Category / Astronomy & Space / Re: C/2008 J1 Boattini on: July 13, 2008, 06:12:29 pm
Must have a go at this one then. The ephemeris I have is estimating mag. 13 which is out of my sensible reach (for a comet) but mag. 10 is definitely worth a go.
1222  General Category / Astronomy & Space / Re: C/2007 W1 Boattini on: July 13, 2008, 06:08:47 pm
Anyone  going  to try take a picture of it.
Yeah ... was kitted out to do so last night but the weather decided not to cooperate - there was a lot of cloud on the E horizon and the dreaded stratocumulus was starting to regroup having left me a hole whilst the sky was dark!

And I'll certainly not write it off until it gets below mag 10.
1223  General Category / Photography / Re: A Few From Ballyronan Marina on: July 13, 2008, 03:21:52 pm
Quote
Those blobs are the famous Lough Neagh fly.
Hmmm, I know them well - but not as well as those who live by the lough. The University of Ulster used to have a freshwater research post at Traad Point (very close to Ballyronan) & sometimes it wasn't actually possible to drive to it as the flies were so thick visibility was reduced to a few feet!

It's a Good Job the things don't bite, otherwise the whole area round the lough would be a no-go area for mammals Wink
1224  General Category / Photography / Re: A Few From Ballyronan Marina on: July 13, 2008, 09:01:24 am
Isn't it interesting how the colour shifts as the twilight starts to fade?

Some nice shots there, I particularly like the one below the one with the dog - it's so simple, just water and sky - I think crop it to a very long letterbox format (about 4:1), warm the colours up a little (or convert to monochrome) & place the horizon 1/3 the way up for maximum impact.

If I could be forgiven for being a little bit "picky", it does help to have the horizon level when it's a flat one like these are! I find a tripod and a gridded screen help a lot for landscape photography, and not just for steadying the camera. Yes, I know you can fix a tilt in Photoshop, but I'd rather get it right in the first place - comes from exposing a lot of slides I suppose.

1225  General Category / Astronomy & Space / Re: M27 on: July 13, 2008, 08:49:22 am
Very nice!
1226  General Category / Astronomy & Space / Re: C/2007 W1 Boattini on: July 12, 2008, 10:13:47 pm
Quote
I was up very late last night hoping to catch the comet but the clouds could not be encouraged to part. Looking forward to seeing it soon.
Yeah, my ephemeris (for 55.2N 6.5W) shows the altitude of the comet as barely 6 degrees at 02:10 UTC (0310 BST) July 13th when the Sun's centre is 10 degrees below the horizon - both uncorrected for refraction - the sky will be brightening significantly by then so I don't think there'd be much chance of seeing the comet any later.

I still haven't seen this comet at all though I did manage to image it twice pre-perihelion!
1227  General Category / Weather & Atmospherics / Interesting cloud formation on: July 12, 2008, 09:09:10 pm
Hi,

I took this sequence of images over a 10 minute period last summer. The cloud formation is unusual, does anyone know how the waves are created? It's not the usual lenticular cloud formation as it was moving fast, with the high level cirrus, not more or less stationary like a train of wave clouds would be.






1228  General Category / Weather & Atmospherics / Metcheck? on: July 12, 2008, 10:14:50 am
Have they forgotten to renew their DNS registration? The site that was working a couple of days ago
appears to have been replaced by an advert for a DNS registration company  Angry
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