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Дата изменения: Wed Apr 21 12:32:49 2004 Дата индексирования: Tue Oct 2 01:11:15 2012 Кодировка: Поисковые слова: comet tail |
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From: TerryMoselaol.com Date: Tue, 20 Apr 2004 18:47:41 EDT Subject: Sunspot, Comets, AGM, Rocks Around The North Hi all, 1. Quite a good sized sunspot has just come into view on the Sun - the first for a while. Watch to see how it develops, and if it produces any CME's. 2. Comet Bradfield (C2004/F4 (Bradfield) is the full title) has now almost disappeared from the SOHO Lasco C3 images - wasn't it brilliant? Only a trace of a tail now remains in view. Latest predictions are that the comet will soon become visible in the dawn twilight sky, just North of East, but it will be fading rapidly as it moves away from both Earth and Sun. It might be as bright as 3rd magnitude on Thur morning (22nd), but still very low, and as already noted it will fade rapidly just as it climbs higher into a darker sky each morning. Here are positions (2000.0) for 0h UT each date: R.A. Dec Mag Elong Apr 22 01h 13m 11s 19o 26' 19" 3.8 13 Apr 24 01h 05m 43s 23o 44' 11" 4.8 18 Apr 26 01h 01m 04s 27o 13' 54" 5.7 22 Apr 28 00h 58m 23s 30o 06' 58" 6.4 25 Apr 30 00h 57m 01s 32o 32' 45" 7.0 28. Better news is that Comet C/2002 T7 (LINEAR) is expected to reach magnitude 0.3 - almost as bright as Capella, in mid May, although it will then be impossible to see for observers in our latitudes. But it might still be a good naked eye object in early June when it becomes visble again low in the evening skies, which unfortunately by then will never get really dark. But still, it might be quite nice in the late twilight at around 3rd to 4th magnitude. It might even just be visible very briefly, and very low down in the morning twilight, in late April & early May - more details on that soon. Even Better News is that C/2001 Q4 (NEAT) is also expected to be quite bright when it zooms up above our SW horizon in early May: maybe visible by May 6 or 7, if it's as bright as predicted: the latest BAA Circular predicts magnitude 1 around May 7/8/9, which should be pretty good! More details on that one later too. 3. The IAA AGM will be on Wed 28 April, 7.30 p.m., Room 5, Stranmillis College Belfast. After the business, which shouldn't take too long, we'll have George Brannan's renowned Video highlights of the year! Not to be missed! Plus free light refreshments. All are welcome, but only paid up members can take part in any official business. 4. For you astronomer - geologists: Mike Simms asked me to circulate these details: Hi Terry, Here are details of the Rocks Around the North events. The Larne one is of most interest to IAA members I should imagine, but the others should all be good. Thanks. Dr. Mike Simms, Curator of Palaeontology, Department of Geology, Ulster Museum Botanic Gardens, Belfast BT9 5AB. Tel. 028-9038 3133, FAX 028-9038 3103 michael.simms.
nics.gov.uk, www.burrenkarst.com Rocks Around the North Come along to these guided walks to discover more about the rocks of Northern Ireland. No previous knowledge is required and all of the events are FREE! Bank Holiday weekend - 1st-3rd May 2004 SATURDAY LARNE - Saturday 1st May (afternoon) Deserts, Drowning and Disasters (with Mike Simms) Meet at 2p.m. in the car park on the seaward side of the Leisure Centre for a stroll along the promenade and onto the shore. See for yourself clues to an ancient desert, rising sea levels, and the impact of a giant meteorite 200 million years ago. SUNDAY BELFAST - Sunday 2nd May Rocks Around the Docks (with Alan Bell) Meet at 12.30 by the sheep outside the Waterfront Hall for a 90 minute walkabout to see the variety of rocks, from near and far, used in and around the docks. Aqualung not required. ULSTER MUSEUM- Sunday 2nd May - AFTERNOON LECTURE EVENT Discovering Dinobirds (with Angela Milner, Natural History Museum, London) A half-hour talk starting at 3 p.m.. Hear a World expert on the subject speak about the latest amazing discoveries showing that birds are just small feathered dinosaurs. MONDAY CAVE HILL - Monday 3rd May (morning) Walking With Imagination (with Tony Bazley) Start at 10.30a.m. in the Lower Car Park [326810] at Belfast Zoo. A circular walk to McArts Fort and back, via 'the' cave, by about 1pm. See the landscape through the eyes of a geologist, taking you from the death of the dinosaurs through a fiery volcanic hell to vast landslides and ancient Man. The route is moderately difficult and strenuous in places; appropriate footwear is essential. CULTRA - Monday 3rd May (afternoon) Mudflats, Mountains and Magnesian Limestone (with Mike Simms) Meet at 2 p.m. at the east end of the Seafront Road [opposite end from the Yacht Club] for an easy stroll along the shore to see the amazing evidence for ancient mudflats, salty seas and vanished mountains. And find out what Magnesian Limestone is. Clear Skies (and dry ground for the geologists!) Terry Moseley
Last Revised: 2004 April 21st
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