Presumably the second attempt will take place in a day.
The first launch of “Angara A-5” from the Vostochny Cosmodrome, planned at 12:00, was temporarily canceled for unknown reasons. The rocket was supposed to launch with the Orion upper stage and a test payload.
The rocket should replace the only heavy Russian launch vehicle Proton. It is distinguished from the Proton, which flew on harmful heptyl, because of its environmentally friendly fuel and modularity.
The family of Russian unified Angara launch vehicles with oxygen-kerosene engines includes carriers from light to heavy classes. The light «Angara-1.2» with a payload capacity of 3.5 tons (when placing a payload into low Earth orbit (LEO)) was launched in 2014.
Heavy (up to 25 tons for LEO) «Angara A-5» took off into the sky for the first time in 2014, and then successfully launched two more, the last time in 2021. All launches were made from the northern Plesetsk cosmodrome in the Arkhangelsk region.
Now we are waiting for the launch from Vostochny, located in the Amur region region. The difference between launches from these cosmodromes lies in the launch capability: from Plesetsk satellites can be launched into lower orbits, from Vostochny — to higher ones. In addition, the launch complex of the cosmodrome in the Far East is designed in such a way that it will allow them to be sent into space in the future and manned missions.
The developer and manufacturer of the Angara family of rockets is the State Space Research and Production Center named after M. V. Khrunichev.