{"id":2377,"date":"2017-05-29T13:59:00","date_gmt":"2017-05-29T12:59:00","guid":{"rendered":"http:\/\/www.popastro.com\/main_spa1\/variablestar\/?p=2377"},"modified":"2017-11-23T15:45:38","modified_gmt":"2017-11-23T15:45:38","slug":"eclipsing-binary-predictions-2017-june-august","status":"publish","type":"post","link":"https:\/\/www.popastro.com\/variablestar\/2017\/05\/29\/eclipsing-binary-predictions-2017-june-august\/","title":{"rendered":"Eclipsing Binary predictions : 2017 June-August"},"content":{"rendered":"

Here are predictions for eclipses that are reasonably favourable from the UK during June, July and August:<\/p>\n

Times are in UT (same as GMT, 1 hour behind BST – so, for example, 22.5h UT is 23.5h BST)<\/p>\n

RZ Cassiopeiae<\/strong><\/u><\/p>\n

Eclipses last 4.8h, with most of the brightness changes taking place during the middle 3 hours. The times shown below are for the mid-point of the primary eclipses. Eclipses are not quite total, so there is no spell of constant brightness at mid eclipse.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Date<\/td>\nMid-Eclipse (UT)<\/td>\n<\/tr>\n
June 1<\/td>\n0.7h<\/td>\n<\/tr>\n
June 7<\/td>\n0.2h<\/td>\n<\/tr>\n
June 12<\/td>\n23.6h<\/td>\n<\/tr>\n
June 18<\/td>\n23.1h<\/td>\n<\/tr>\n
June 24<\/td>\n22.5h<\/td>\n<\/tr>\n
June 30<\/td>\n21.9h<\/td>\n<\/tr>\n
July 2<\/td>\n2.6h<\/td>\n<\/tr>\n
July 8<\/td>\n2.0h<\/td>\n<\/tr>\n
July 14<\/td>\n1.4h<\/td>\n<\/tr>\n
July 20<\/td>\n0.9h<\/td>\n<\/tr>\n
July 26<\/td>\n0.3h<\/td>\n<\/tr>\n
July 31<\/td>\n23.7h<\/td>\n<\/tr>\n
August 6<\/td>\n23.2h<\/td>\n<\/tr>\n
August 12<\/td>\n22.6h<\/td>\n<\/tr>\n
August 14<\/td>\n3.3h<\/td>\n<\/tr>\n
August 18<\/td>\n22.0h<\/td>\n<\/tr>\n
August 20<\/td>\n2.7h<\/td>\n<\/tr>\n
August 24<\/td>\n21.5h<\/td>\n<\/tr>\n
August 26<\/td>\n2.1h<\/td>\n<\/tr>\n
August 30<\/td>\n20.9h<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

U Cephei<\/strong><\/u><\/p>\n

Eclipses last for approx 9 hours. The times shown below are for the primary eclipse mid-point. Eclipses are total, so there is a period of constant brightness around the middle of the eclipse. By August, mid eclipse is occurring during the evening twilight from the UK and so only the brightening from eclipse will be observable<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Date<\/td>\nMid-Eclipse (UT)<\/td>\n<\/tr>\n
June 5<\/td>\n1.1h<\/td>\n<\/tr>\n
June 10<\/td>\n0.8h<\/td>\n<\/tr>\n
June 15<\/td>\n0.4h<\/td>\n<\/tr>\n
June 20<\/td>\n0.1h<\/td>\n<\/tr>\n
June 24<\/td>\n23.8h<\/td>\n<\/tr>\n
June 29<\/td>\n23.4h<\/td>\n<\/tr>\n
July 4<\/td>\n23.1h<\/td>\n<\/tr>\n
July 9<\/td>\n22.8h<\/td>\n<\/tr>\n
July 14<\/td>\n22.5h<\/td>\n<\/tr>\n
July 19<\/td>\n22.1h<\/td>\n<\/tr>\n
July 24<\/td>\n21.8h<\/td>\n<\/tr>\n
July 29<\/td>\n21.5h<\/td>\n<\/tr>\n
August 3<\/td>\n21.1h<\/td>\n<\/tr>\n
August 8<\/td>\n20.8h<\/td>\n<\/tr>\n
August 13<\/td>\n20.5h<\/td>\n<\/tr>\n
August 18<\/td>\n20.1h<\/td>\n<\/tr>\n
August 23<\/td>\n19.8h<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

U Coronae Borealis<\/strong><\/u><\/p>\n

Corona Borealis is now quite well placed in the evening sky … but …\u00a0 the nights are now too short for the whole eclipse to be observable in one session!<\/p>\n

Eclipses last for approx 12 hours. The times shown below are for the primary eclipse mid-point.\u00a0 Eclipses are not total, so there is no spell of constant brightness around the middle of the eclipse.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Date<\/td>\nMid-Eclipse (UT)<\/td>\n<\/tr>\n
June 11<\/td>\n2.1h<\/td>\n<\/tr>\n
June 17<\/td>\n23.8h<\/td>\n<\/tr>\n
June 24<\/td>\n21.5h<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/tr>\n
July 19<\/td>\n1.5h<\/td>\n<\/tr>\n
July 25<\/td>\n23.2h<\/td>\n<\/tr>\n
August 1<\/td>\n20.9h<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/tr>\n
August 19<\/td>\n3.2h<\/td>\n<\/tr>\n
\u00a0August 26<\/td>\n0.9h<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Beta Lyrae<\/strong><\/u><\/p>\n

Beta Lyrae is now wll placed for observation throughout the night.<\/p>\n

Both the deeper primary eclipse and less deep secondary eclipse can be followed visually. There is no period of constant brightness between eclipses.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Date<\/td>\nMid-Eclipse (UT)<\/td>\n<\/tr>\n
June 1-2<\/td>\nprimary<\/td>\n<\/tr>\n
June 7-8<\/td>\nsecondary<\/td>\n<\/tr>\n
June 14-15<\/td>\nprimary<\/td>\n<\/tr>\n
June 20-21<\/td>\nsecondary<\/td>\n<\/tr>\n
June 27-28<\/td>\nprimary<\/td>\n<\/tr>\n
July 3-4<\/td>\nsecondary<\/td>\n<\/tr>\n
July 11-12<\/td>\nprimary<\/td>\n<\/tr>\n
July 16-17<\/td>\nsecondary<\/td>\n<\/tr>\n
July 23-24<\/td>\nprimary<\/td>\n<\/tr>\n
July 29-30<\/td>\nsecondary<\/td>\n<\/tr>\n
August 5-6<\/td>\nprimary<\/td>\n<\/tr>\n
August 11-12<\/td>\nsecondary<\/td>\n<\/tr>\n
August 18-19<\/td>\nprimary<\/td>\n<\/tr>\n
August 24-25<\/td>\nsecondary<\/td>\n<\/tr>\n
August 31-Sep 1<\/td>\nprimary<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Beta Persei (Algol)<\/strong><\/u><\/p>\n

Eclipses last for approx 10 hours. The times shown below are for the primary eclipse mid-point. Eclipses are only partial, so there is no period of constant brightness around the middle of the eclipse.<\/p>\n

Although Algol is (just) circumpolar from the UK, it will be too low in the sky during late spring and early summer nights for accurate brightness estimates to be made.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Date<\/td>\nMid-Eclipse (UT)<\/td>\n<\/tr>\n
June 12<\/td>\n1.8h<\/td>\n<\/tr>\n
June 14<\/td>\n22.7h<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/tr>\n
July 5<\/td>\n0.4h<\/td>\n<\/tr>\n
July 7<\/td>\n21.2h<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/tr>\n
July 25<\/td>\n2.1h<\/td>\n<\/tr>\n
July 27<\/td>\n22.9h<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/tr>\n
August 14<\/td>\n3.8h<\/td>\n<\/tr>\n
August 17<\/td>\n0.7h<\/td>\n<\/tr>\n
August 19<\/td>\n21.5h<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

Here are predictions for eclipses that are reasonably favourable from the UK during June, July and August: Times are in UT (same as GMT, 1 hour behind BST – so, for example, 22.5h UT is 23.5h BST)<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[2],"tags":[],"class_list":["post-2377","post","type-post","status-publish","format-standard","hentry","category-variable-stars"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t