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Дата изменения: Mon May 12 12:42:19 2003 Дата индексирования: Tue Oct 2 01:07:11 2012 Кодировка: Поисковые слова: heart nebula |
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From: TerryMosel@aol.com Date: Sun, 11 May 2003 10:27:13 EDT Subject: Thanks, TVprog 2nite, Eclipse Hi all, 1. Thanks to everyone who sent in reports of their observations of the Mercury transit (or clouds...): far too many for me to reply in detail to all! Some observers in Germany saw the ISS transit across the Sun at the same time as Mercury - details: On May 7 at 05:18:48 UT, 2.8 minutes after Mercury's second contact, the ISS entered the sun's disk just a few arcsecs east of Mercury, and hurried across within 4 seconds. Several observers noticed this event visually, some describe the shape as elongated or triangular, about as large as Mercury or somewhat larger. But obviously me and my son Alexander are the only lucky people who captured it on video, also photos are not known yet. Maybe the publication will incite further observers to review their recordings. Because of the larger field of view, I decided to use my old-fashioned VHS camera attached to my Celestron 8 plus focus reductor. But this caused the problem to gain a good digitized and compressed copy. Best thanks to Ulrich Rieth, another member of our local astronomy club "Astronomische Arbeitsgemeinschaft Mainz", for his decisive support! Because we are still working on an improved version, it wasn't my intension to publish the preliminary one right now. But Ulrich sent a short sequence to http://www.spaceweather.com/ ... and please have a look, where it came out... Now it happened! 2. Planetary astronomers & geologists/ geophysicists might be interested in this prog on Channel 4 at 20.00 tonight, Sunday: "Magnetic Flip: No human has ever visited the Earth's core, but what happens there, 2,000 miles under the ground, profoundly affects everyday life. There, liquid iron generates a magnetic field that cocoons the planet from the dangers of space. But scientists have recently found a storm brewing within the Earth that could destroy this protection. This documentary attempts to explain why the field is rapidly shrinking - and what will happen if it disappears." This phenomenon was featured on a recent IAA Newsheet, and in my lecture on "Aliens - Where Are They?" .... 3. Don't forget to build up some sleep credit for the Total Lunar eclipse on 15-16 May (Thurs night - Fri morning). The following times are BST: Start oif Penumbral Phase (P1) Barely noticeable): 02h 05m 25s Start of Umbral Phase (U1): 03h 02m 51s Start of Total Phase: (U2) 04h 13m 49s Mid Eclipse: 04h 40m 10s End of Total Phase: (U3) 05h 06m 31s End of Umbral Phase (U4): 06h 17m 29s Duration of Totality is just 52 mt 42s, and the sky will be brightening with dawn twilight towards the end of totality, especially for observers in the North-east. In fact at 05.00, just before the end of totality, the Sun is only 2° 47' below the horizon from Belfast, so the eclipsed moon may not be visible at all in the twilight! The Moon sets from Ireland just after the end of totality, so the later umbral stages will not be visible at all. The table gives the altitude & azimuth of the Moon at mid eclipse, and end of totality, from various cities. Belfast Dublin Cork Limerick Mid Eclipse 4° 31'; 227°. 5° 21'; 227°. 7° 28'; 22 5°. 7° 00'; 225° End Totality 1° 48'; 232°. 2° 42'; 232°. 4° 38'; 230°. 4° 10'; 230° The Moon passes though the North edge of the Earth's umbra, so the S edge of the Moon will appear darkest, although not even the S edge of the Moon passes through the centre of the umbra. Observers in SW Ireland will have the best view, with the Moon higher up, and the Sun further below the horizon, at all stages of the eclipse. That may make up for their weather during the Mercury transit! The Moon occults an 8m.7 magnitude star, TYC 6192-1038-1, or HD 137916, at about 04.30 during the eclipse: that event may just be visible if the sky is dark enough. Good luck! Terry Moseley
Last Revised: 2003 May 12th
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