  We present the first period-luminosity (PL) and period-Wesenheit (PW)
relations in the Sloan-Pans-STARRS gP1rP1iP1 bands for classical fundamental
mode Cepheids in the Milky Way. We used a relatively modest number of 76 stars
for the PL and 84-85 stars for the PW relations calibration. The data for the
project were collected with the network of 40-cm telescopes of Las Cumbres
Observatory, and Gaia Data Release 3 parallaxes were used for the calculations.
These gri-band PL and PW relations calibrations will be a useful tool for
distance determinations in the era of large sky surveys using the Sloan
photometric system, especially with the near-future start of the Large Synoptic
Survey of Space and Time (LSST).
