Mass - 1,3 kg
Purpose - Ed-Scientific sat
The launch date - 10.07.18

The scientific and educational satellites SiriusSat-1 and SiriusSat-2 were assembled by schoolchildren in cooperation with SPUTNIX specialists on the basis of the nanosatellite platform OrbiCaft-Pro developed by the company. The platform has a standardized international standard size cubsat 1U. The satellite SiriusSat have been further developed to meet the specifics of launch: they have a handle for launching an astronaut, flexible antennas, a system for the manual activation of spacecraft, and also equipped with specially designed protective quick-release covers and soft shipping containers. The weight of each satellite is about 1.3 kg. The payload of the satellite is a space particle detector for studying "space weather". The sensor was developed by the Research Institute of Nuclear Physics of the Moscow State University and was assembled with the participation of a group of schoolchildren from the Sirius Educational Center.

The SiriusSat satellite was demonstrated to the President of the Russian Federation Vladimir Putin in Sochi during his visit to the educational center Sirius in the summer of 2017. Then the children who designed the spacecraft asked the question of the possibility of the subsequent launch of the satellite they built. Roskosmos helped in organizing free-of-charge sending to orbit within the framework of the corporation's program for the free launch of Russian school and student satellites. Subsequently, it was decided that two identical spacecraft - SiriusSat-1 and SiriusSat-2 would be launched into space at once.

The satellites pass to RSC Energia additional checks before being sent to the ISS. The launch of two satellites to the station is scheduled for July 10, 2018 on board the Progress-MS-09, and a launch to free-flight in August during the cosmonauts spacewalk.