SIMBAD references

CCD BVRcIc light curves of V1695 Aquilae were taken during the Fall 2016 season at the Cerro Tololo InterAmerican Observatory with the 0.6-meter reflector of the SARA South observatory in remote mode. It is an eclipsing binary with a period of 0.41283 d. The light curves yield a total eclipse (duration: 59 minutes) but have an amplitude of only ∼0.4 mag. The spectral type is ∼G8V (∼5500 K). Four times of minimum light were calculated, all primary eclipses, from our present observations. We calculated linear and quadratic ephemerides from all available times of minimum light. A 17-year period study reveals a quadratic orbital period decrease at a high level of confidence. The orbital period is changing at a rapid rate of of dp/ dt = -1.73 x 10-6 d/yr. The solution is that of an Extreme Mass Ratio Binary. The mass ratio is found to be near 0.16. Its Roche Lobe fill-out is a hefty 83%. The small component has the slightly hotter temperature of ∼5650 K, which makes it a W-type W UMa Binary. As expected in binaries of this spectral type, it has cool spot regions.