{"id":2360,"date":"2017-02-27T13:50:46","date_gmt":"2017-02-27T13:50:46","guid":{"rendered":"http:\/\/www.popastro.com\/main_spa1\/variablestar\/?p=2360"},"modified":"2017-12-07T17:25:36","modified_gmt":"2017-12-07T17:25:36","slug":"eclipsing-binary-predictions-2017-march-may","status":"publish","type":"post","link":"https:\/\/www.popastro.com\/variablestar\/2017\/02\/27\/eclipsing-binary-predictions-2017-march-may\/","title":{"rendered":"Eclipsing Binary predictions : 2017 March-May"},"content":{"rendered":"

Here are predictions for eclipses that are reasonably favourable from the UK during March, April and May:<\/p>\n

Times are in UT (same as GMT, 1 hour behind BST – so, for example, 22.8h UT is 23.8h 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 brightnss 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\n\n
Date<\/td>\nMid-Eclipse (UT)<\/td>\n<\/tr>\n
March 6<\/td>\n23.3h<\/td>\n<\/tr>\n
March 8<\/td>\n4.0h<\/td>\n<\/tr>\n
March 12<\/td>\n22.8h<\/td>\n<\/tr>\n
March 14<\/td>\n3.5h<\/td>\n<\/tr>\n
March 18<\/td>\n22.2h<\/td>\n<\/tr>\n
March 20<\/td>\n2.9h<\/td>\n<\/tr>\n
March 24<\/td>\n21.7h<\/td>\n<\/tr>\n
March 26<\/td>\n2.3h<\/td>\n<\/tr>\n
March 30<\/td>\n21.1h<\/td>\n<\/tr>\n
April 1<\/td>\n1.7h<\/td>\n<\/tr>\n
April 5<\/td>\n20.5h<\/td>\n<\/tr>\n
April 7<\/td>\n1.2h<\/td>\n<\/tr>\n
April 11<\/td>\n19.9h<\/td>\n<\/tr>\n
April 13<\/td>\n0.6h<\/td>\n<\/tr>\n
April 19<\/td>\n0.0h<\/td>\n<\/tr>\n
April 24<\/td>\n23.5h<\/td>\n<\/tr>\n
April 30<\/td>\n22.9h<\/td>\n<\/tr>\n
May 6<\/td>\n22.3h<\/td>\n<\/tr>\n
May 12<\/td>\n21.8h<\/td>\n<\/tr>\n
May 14<\/td>\n2.5h<\/td>\n<\/tr>\n
May 18<\/td>\n21.2h<\/td>\n<\/tr>\n
May 20<\/td>\n1.9h<\/td>\n<\/tr>\n
May 26<\/td>\n1.3h<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

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

Eclipses last for approx 12 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.<\/p>\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
March 4<\/td>\n19.3h<\/td>\n<\/tr>\n
March 9<\/td>\n18.8h<\/td>\n<\/tr>\n
March 14<\/td>\n18.3h<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/tr>\n
April 21<\/td>\n4.1h<\/td>\n<\/tr>\n
April 26<\/td>\n3.8h<\/td>\n<\/tr>\n
May 1<\/td>\n3.4h<\/td>\n<\/tr>\n
May 6<\/td>\n3.1h<\/td>\n<\/tr>\n
May 11<\/td>\n2.8h<\/td>\n<\/tr>\n
May 16<\/td>\n2.4h<\/td>\n<\/tr>\n
May 21<\/td>\n2.1h<\/td>\n<\/tr>\n
May 26<\/td>\n1.8h<\/td>\n<\/tr>\n
May 31<\/td>\n1.4h<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

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

Corona Borealis is now becoming better placed in the evening sky … but …\u00a0 the nights are now becoming 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\n
Date<\/td>\nMid-Eclipse (UT)<\/td>\n<\/tr>\n
March 2<\/td>\n23.3h<\/td>\n<\/tr>\n
March 9<\/td>\n21.1h<\/td>\n<\/tr>\n
March 16<\/td>\n18.9h<\/td>\n<\/tr>\n
March 27<\/td>\n3.3h<\/td>\n<\/tr>\n
April 3<\/td>\n1.1h<\/td>\n<\/tr>\n
April 9<\/td>\n22.7h<\/td>\n<\/tr>\n
April 16<\/td>\n20.5h<\/td>\n<\/tr>\n
May 4<\/td>\n2.7h<\/td>\n<\/tr>\n
May 11<\/td>\n0.4h<\/td>\n<\/tr>\n
May 17<\/td>\n22.2h<\/td>\n<\/tr>\n
May 24<\/td>\n19.9h<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

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

Beta Lyrae starts this spell as a morning sky object but becomes better placed by mid-spring.<\/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
Date<\/td>\nMid-Eclipse (UT)<\/td>\n<\/tr>\n
March 3-4<\/td>\nprimary<\/td>\n<\/tr>\n
March 9<\/td>\nsecondary<\/td>\n<\/tr>\n
March 16-17<\/td>\nprimary<\/td>\n<\/tr>\n
March 27<\/td>\nsecondary<\/td>\n<\/tr>\n
March 29-30<\/td>\nprimary<\/td>\n<\/tr>\n
April 4-5<\/td>\nsecondary<\/td>\n<\/tr>\n
April 10-11<\/td>\nprimary<\/td>\n<\/tr>\n
April 17-18<\/td>\nsecondary<\/td>\n<\/tr>\n
April 23-24<\/td>\nprimary<\/td>\n<\/tr>\n
April 30-May 1<\/td>\nsecondary<\/td>\n<\/tr>\n
May 6-7<\/td>\nprimary<\/td>\n<\/tr>\n
May 13-14<\/td>\nsecondary<\/td>\n<\/tr>\n
May 19-20<\/td>\nprimary<\/td>\n<\/tr>\n
May 26-27<\/td>\nsecondary<\/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 nights for accurate brightness estimates to be made.<\/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
March 18<\/td>\n1.4h<\/td>\n<\/tr>\n
March 20<\/td>\n22.2h<\/td>\n<\/tr>\n
March 23<\/td>\n19.0h<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/tr>\n
April 9<\/td>\n23.9h<\/td>\n<\/tr>\n
April 12<\/td>\n19.8h<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/tr>\n
May 2<\/td>\n22.5h<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/tr>\n
May 23<\/td>\n0.2h<\/td>\n<\/tr>\n
May 25<\/td>\n21.0h<\/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 March, April and May: Times are in UT (same as GMT, 1 hour behind BST – so, for example, 22.8h UT is 23.8h 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-2360","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