V4018 Sgr, a ZAND star in outburst
AAVSO Alert Notice #470 informs about the outburst of this symbiotic star.
While checking ASAS-3 data, I found that the orbital period of this system is 501 d. and that it displays large amplitude (0.5 mag.) ellipsoidal variability and also reflection effect at its quiescent state.
This light curve uploaded to VSX also includes some observations from Henden and Munari's 2008 paper on symbiotics:
It would be interesting to see if this orbital variability is still present or is hidden now that the star is in outburst.