A few hours after the first official announcement about a problem aboard Luna-Glob, an unofficial Telegram channel, Zakryty Kosmos, reported that the spacecraft had broken communications with ground control during the orbit correction but Roskosmos continues its attempts to contact the spacecraft. Before the end of the day on August 19, Aleksandr Ivanov, First Deputy Director for the Development of Orbital Assets and Advanced Projects at Roskosmos, arrived at NPO Lavochkin, the prime contractor in the Luna-Glob project with its own mission control facility. Ivanov reportedly chaired a meeting on the status of the Luna-Glob mission.The rumors in the German fediverse state, that the last burn was actually too long by the factor 1.6, but I can't find any evidence or at least reason for this hypothesis yet.
A few hours after the first official announcement about a problem aboard Luna-Glob, an unofficial Telegram channel, Zakryty Kosmos, reported that the spacecraft had broken communications with ground control during the orbit correction but Roskosmos continues its attempts to contact the spacecraft. Before the end of the day on August 19, Aleksandr Ivanov, First Deputy Director for the Development of Orbital Assets and Advanced Projects at Roskosmos, arrived at NPO Lavochkin, the prime contractor in the Luna-Glob project with its own mission control facility. Ivanov reportedly chaired a meeting on the status of the Luna-Glob mission.
Around the same time, another Telegram channel Yura Prosti claimed that a computational error led to the final engine firing to be 1.5 times longer than required and thus resulting in deorbiting and crash of the spacecraft on the Moon.
https://www.russianspaceweb.com/luna-glob-flight.html
I don't think these 2 scenarios are compatible with each other: if the LOS was during the burn, then it might have been caused by loss of control or engine kaput, while that overburn might/would only mean a LOS over 1 hour later.
British cynical humor, :hum: Here is the news by Roscosmos / TelegramBBC says it performed lithobraking on the moon.
Russia's Luna-25 spacecraft crashes into Moon
The unmanned craft spun out control before its planned landing on the Moon's south pole.www.bbc.com
BBC says it performed lithobraking on the moon.
Russia's Luna-25 spacecraft crashes into Moon
The unmanned craft spun out control before its planned landing on the Moon's south pole.www.bbc.com
Dust got nothing to do with atmosphere or no atmosphere. The spacecrafts thrusters are going to blow up regolith dust when it lands, and in the low gravity it may indeed be advisable to wait a couple of hours to let it all fall back to the ground again. Lunar dust is really nasty stuff...Since when does the dust on the surface of the Moon take "a few hours" to settle with the absence of an atmosphere?
Very small dust particles can "float" in an atmosphere for a while, especially on a windy day. Dust in the atmosphere even influences the climate. On the Moon, dust actually just falls back rather quickly (and simultaneously, no matter the size/mass of the grains). It goes up and falls down again straight. How does it float for "a few hours"?Dust got nothing to do with atmosphere or no atmosphere. The spacecrafts thrusters are going to blow up regolith dust when it lands, and in the low gravity it may indeed be advisable to wait a couple of hours to let it all fall back to the ground again. Lunar dust is really nasty stuff...
Also, congrats to Roscosmos for the successful "special landing operation".
How does it float for "a few hours"?