KIC 7105691 Unlisted Detached Eclipsing Binary with Highly Eccentric Orbit

KIC 7105691 in Q16 at NEA

Planet Hunters Talk member  Blammo flagged this star in Q16. It is part of an unlisted detached eclipsing binary star system that has now shown up for the first time in sixteen quarters of the Kepler light curves. The reason is that it has a highly eccentric orbit. Here is what PH forumTalk member Kian Jek has to say:

This is a very eccentric eclipsing binary for sure, but is it the real EB? An examination of the FITS file shows tiny APOs:

However, the vector plotted out shows the flux centroid shifting towards the tiny unmarked star at 1 o'clock. What I think is happening here is that during the dimming of the target, the presence of the companion in the halo pixel is shifting the centroid towards itself.

Let's try and calculate the eccentricity of this EB. I use the following relation, found in p. 86 of Kallrath and Milone (2009) to determine the minimum eccentricity of this EB:

where P is the period, t1, t2 are the epochs of the primary and secondary eclipses, in this case, for delta t1,t2, we have 29.8d as the separation between these 2 eclipses. P is not known, but we can assume that it is >1386d. Entering these values into the equation, we get a minimum eccentricity of 0.75.
This is quite an eccentric orbit, but it is not the most extreme eccentricity for an EB in the Kepler data set. That honor belongs to KIC 9214712, which has an e_min of 0.85 (see Dong et al)

You can read more about this star at the PH Talk thread here.