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USNO-A2.0 1200-1153830 is a binary star with a total eclipse with sharp transitions

ATel #10070; Rene Roy (Blauvac, France), Raoul Behrend (Geneva Observatory)
on 11 Feb 2017; 22:23 UT
Credential Certification: Raoul Behrend (raoul.behrend@obs.unige.ch)

Subjects: Optical, Request for Observations, Variables

Based on their photometric observations, R. Roy (Blauvac, France) and R. Behrend (Geneva Observatory) found that USNO-A2.0 1200-1153830 is a binary star for which the lightcurve is characterized by a 0.4mag total eclipse and a rather soft secondary eclipse. Due to the very annoying period of 3.015 day, they were not able to observed the whole secondary event; observations from outside continental Europe are welcome. As the duration of the transition of the total eclipse is rather short, the system is probably a common star orbited by a small and hot component. J2000 location: 02h40m56.8s +36o21'22" (Triangulum). Middle date of a total eclipse: 2016-12-09.99 UT. Outside the eclipses, V~13.6

Optical lightcurve of USNO-A2.0 1200-1153830