SIMBAD references

CCD observations of the RRab star DT Gem (RA = 06 06 58.09, DE = +25 24 02.0 (2000)) were obtained at my private observatory. For DT Gem 8 maxima were obtained. The amplitude of the light-curve varies epoch to epoch. So does the stepness of the rising and descending branch also. These variations are due to a small Blazhko effect. The observations will be continued to find the Blazhko period. Elements of DT Gem are revised as: DT Gem: Max = 2456355.4134 + 0.611283 * E, which is shorter than given in GCVS. Phased lightcurves of DT Gem provided by IOMC, SuperWASP, ASAS and NSVS are given.