SIMBAD references

This procedure-oriented paper presents a discussion of one new and various archival photometric measurements of the B[e] supergiant Henize-S 22, and outlines significant systematic differences between all involved systems of photometric measurement. The conclusion of this study is that the object is slowly brightening and reddening, a typical signature of an LBV S Doradus phase. The analysis reveals a strong aperture effect in the ASAS photometry of this very special star.