What is "sasyr"

Sasyr is a rural locality (a selo), the only inhabited locality, and the administrative center of Ulakhan-Chistaysky National Rural Okrug of Momsky District in the Sakha Republic, Russia, located from Khonuu, the administrative center of the district. Its population as of the 2010 Census was 713, of whom 364 were male and 349 female, down from 772 recorded during the 2002 Census.