Аннотация:CCD photometry of the optical counterpart of XTE
J1859+226 (IAUC 7274, 7276) with the 0.25-m and 0.38-m telescopes
at Kyoto and Crimea revealed likely orbital modulations with a
period of 0.2806 day and an amplitude of 0.10 mag. The variations
were present on Oct. 20-26, and possibly on Oct. 17, which makes
this the earliest detection of such signals among x-ray novae (cf.
IAUC 5259, 5692).