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We present time-series CCD photometry in the $BVRI$ passbands of the recentlyidentified symbiotic nova V1835 Aquilae (NSV 11749) over an interval of 5.1years with 7-14 day cadence, observed during its quiescence. We find slow lightvariations with a range of $\sim$0.9 mag in $V$ and $\sim$0.3 mag in $I$.Analysis of these data show strong periodicity at $419 \pm 10$ days, which weinterpret to be the system's orbital period. A dip in the otherwise-sinusoidalphased light curve suggests a weak ellipsoidal effect due to tidal distortionof the giant star, which in turn opens the possibility that V1835 Aql transferssome of its mass to the hot component via Roche lobe overflow rather than via astellar wind. We also find evidence that V1835 Aql is an S-type symbiotic star,relatively free of circumstellar dust, and include it among the nuclear burninggroup of symbiotics. Finally, we provide photometry, periods, and light curveclassifications for 22 variable stars in the field around V1835 Aql, about halfof which are newly identified.

Optical Time-Series Photometry of the Symbiotic Nova V1835 Aquilae