Proposal #679

I (Bill Dillon, DIL) would like to image V2187 Ori with AAVSONet in the I band with a 20"+ class scope two or three times per week. Exposures would stack to an equivalent of one hour taken at the end of evening astronomical twilight, from March 17 through April 4. The purpose of these observations is to establish an epoch for maximum light for this system for follow up work this Fall to improve the period.

On January 5 of this year, Damien Lemay, co-leader of the Eclipsing Binary Section, asked if anyone had an epoch for the E-DO class system V2187 Ori. I checked, and found no observations for this star in our database. I made a fainter-than observation of 18.7 in V, but was not able to submit it to our database, as the star lacked an AIUD. I requested an AIUD and received one via a VSX request.

I have been able to barely detect this star with hour-long equivalent exposures with the 20" T72 iTelescope in Chile, but this star is in eclipse for 2/3 of its orbital period of about 18 days. I hope by covering it for an orbital period with my own observations and AAVSOnet, it can be caught near it's brief maximum brightness, thus establishing an epoch.

Thanks for your consideration! --Bill