Steering engine of Proton-M 3rd stage failed because of excessive vibration loads, - Roscosmos Head Igor Komarov reported.

After Proton-M booster crush Roscosmos inspected the estimated region of Proton-M debris fall using all possible space surveillance devices and haven’t found anything.

It is too early to replace proton with Angara since this is a new rocket and it didn’t have enough time to accumulate positive flight history – Russian Academy of Cosmonautics named after Tsiolkovsky Andrei Ionin believes. On Monday Russian Vice Prime Minister Dmitry Rogozin demanded to abandon Proton and start using Angara instead.

Off-nominal situation leading to the loss of Proton-M booster with Mexican MexSat-1 satellite happened at 08.59, Moscow time, May 16, 2015 one minute before the space device and the upper stage were t o separate from the 3rd stage of the booster. According to preliminary data the accident was caused by Proton 3rd stage steering engine failure.

Russia plans to launch 12 boosters in the next three months, - spokesman for Rocket and Space industry reports.

Preparation works for the launch of Proton-M booster with Briz-M upper stage and Russian Express-AM7 satellite started at Baikonur spaceport Khrunichev centre press office reports. At the present time the specialists accomplish works on autonomous preparations of Proton-M booster and other compounds of the payload.

Roscosmos will stop purchasing Zenit rockets manufactured by Dnepropetrovsk Yuzhmash plant, - Roscosmos spokesman Igor Burenkov reported. According to him the satellites planned to be launched with the help of Zenit rockets will be delivered to the orbit by new boosters of Angara series.

At 15.31, Moscow time, February 01, 2015, rocket and space industry launching crews of Baikonur spaceport successfully launched Proton-M booster with Briz-M upper stage and inmarsat-5F2 space device from #200 launchpad of Baikonur.

According to the decision taken by State Commission Proton-M booster with Briz-M upper stage and Inmarsat-5F2 (Great Britain) telecommunication space device was rolled out to the launching pad of Baikonur spaceport.

Preparation works for Proton-M with Inmarsat-5F2 satellite launch are under way at Baikonur. Yesterday, January 26, 2015, in 92A-50 integration building of Baikonur spaceport rocket and space industry specialists completed technological operations on rocket assembling and testing. Today morning Proton-M booster with space headcomprising briz-M upper stage and Inmarsat-5F2 space device installed on it was delivered to the filling area