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Post by Bill W on May 19, 2008 9:14:34 GMT
Dear All,
Please remember that if anyone is out and about at the appropriate times and does NOT see NLC it is just as important to post the null observations. OR make sure you send them to Tom for inclusion on the observation page.
This is to ensure that the seasonal results are not statistically skewed by only positive results. Also it shows the geographical spread of displays as NLC are not uniformly distributed entities.
cheers,
Bill.
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Post by martinastro on May 19, 2008 15:17:47 GMT
Hi Bill.
I can report two negative observations from N. Ireland on the 18/19th. Both evening and morning twilight regions showed no activity.
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Post by markt on May 19, 2008 15:49:37 GMT
My plan for the season is whenever it's clear and I have my camera I'm going to take shots of the evening sky (and where possible the morning sky too :S ). Trouble is it's actually seemingly never clear! Whether I get any NLCs in shot is another matter, but either way it will get either a positive or a negative sighting  |
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Post by Bill W on May 21, 2008 11:25:09 GMT
Hello,
Regarding my posting I think the "OR" should really be replaced with "AND" so that everything goes to the one place for counting!
cheers,
Bill
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Post by ediacara on May 28, 2008 9:45:44 GMT
Null observations in Hungary until now.
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Post by martinastro on May 30, 2008 18:58:58 GMT
Negative observations at dusk and pre-dawn on May 29/30th from N. Ireland.
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Post by martinastro on May 31, 2008 10:41:31 GMT
Negative observation pre-dawn, May 30/31st.
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Post by markt on May 31, 2008 12:41:17 GMT
Negative evening observations from Glasgow on 24th and 30th May. Negative evening observations from the Isle of Skye 25th, 26th, 27th and 30th May.  But... I do have some interesting pickies of something else which i'll post in general as soon as I get unpacked and download from my camera  |
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Post by martinastro on Jun 1, 2008 11:23:12 GMT
Negative observation from 00.45 - 01.50 UT with a perfect clear sky on May 31/1. On the same night a person from N. Ireland reported a massive NLC display at 02.00 UT. They must have been mistaken?
Observer seen the NLC display east of Belfast, N. Ireland.
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Post by tmcewan on Jun 1, 2008 19:40:04 GMT
On the same night a person from N. Ireland reported a massive NLC display at 02.00 UT. They must have been mistaken? Observer seen the NLC display east of Belfast, N. Ireland. On May 31-32 I observed through to 02:30 UT from near Dalry, Ayrshire, Scotland. Any NLC visible in N. Ireland would have been seen from here too. I didn't see anything. Highlight of the night was an ISS pass! Will post my full list of May negative reports later. Tom |
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Post by martinastro on Jun 1, 2008 20:52:01 GMT
Thanks very much Tom for the confirmation. I have been in contact with the person and despite telling him that no NLCs where seen by at least five different persons, he still believes what he saw. He must have made a mistake. There was certainly nothing from my location all night either.
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Post by markt on Jun 2, 2008 10:09:41 GMT
With regards null observations would it be helpful if I also include a photo of it?
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Post by tmcewan on Jun 2, 2008 10:13:04 GMT
Here are my negative reports from near Dalry, N. Ayrshire, Scotland for 2008 May:
May 14-15, 21:45-22:35 UT - No obvious NLC with some low streaks of tropospheric cloud to /5-10 degrees.
May 15-16, 21:30-23:00 UT - No obvious NLC through or above low haze and thin tropospheric, /5 degrees.
May 24-25, 21:29-02:00 UT - No NLC in good conditions to 00:30 UT then drifting, variable patchy cloud across north. Moonlit.
May 25-26, 22:00-0105UT - No obvious NLC above low layers of haze and thin cloud stretched across the twilight arch to /5-8 degrees. Increasing cloud 00:15 UT, then overcast by 01:05 UT.
May 30-31, 23:30-23:40 UT - Sky virtually overcast but clear window from NW to NE to /12 degrees; no NLC through this. 01:50-02:05 UT, low patchy cloud NW-N, otherwise clear, no obvious NLC.
May 31-32, 22:04-02:30 UT - Generally clear with low haze, variable cirrus overhead and to east. No NLC.
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Post by tmcewan on Jun 2, 2008 10:19:59 GMT
With regards null observations would it be helpful if I also include a photo of it? Hi Mark, I wouldn't have thought this necessary, unless there's something unusual or you were uncertain about anything. The important details to include are location, date, time (preferably in UT) and description of sky conditions. Tom |
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Post by martinastro on Jun 2, 2008 11:51:53 GMT
Negative observation from N. Ireland June 1/2nd. Period of obsv, 00.40 - 02.00 UT. No NLC seen. Clear sky however dark band of cloud covered northern horizon to a height varying between 5 and 7 degrees.
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