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Old 21-11-2017, 07:15 PM
Terry B's Avatar
Terry B
Country living & viewing

Terry B is offline
 
Join Date: Mar 2006
Location: Armidale
Posts: 2,747
BL Tel

BL Tel is a long period eclipsing binary with a period of 778 days. The eclipse takes over a month to complete and is a nice star to follow. I have taken photometry during the last 4 eclipses starting in April 2011. This year it was in September/October. The graphs are of this eclipse and the last one.
The next eclipse will be very difficult to record as it will be in the evening twilight in the west so hard to image. The 4 series are through BVRI filters.
Still an interesting system.
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Last edited by Terry B; 22-11-2017 at 09:58 AM.
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