Russia seems to have lost contact with its first lunar probe in half a century

D-2

Smack-Fu Master, in training
15
tracker Scott Tilley noted that the country's ability to communicate with Luna 25 will be limited to when the Moon is visible over Russia. There are relatively few of these opportunities in the days ahead.
If Russia's DSN is confined to Russia, it would limit lunar visibility – but not so much due to latitude as highlighted in Tilley's tweets, but simple longitude limits. From 50° N., the Moon's altitude currently peaks around 40° and exceeds 30° above the horizon for ~6 hours/day. Multiple in-country stations in the East and West should provide Russia with pretty wide comm windows.
 
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Not unlike the U.S., to achieve its wildest scientific and engineering ambitions, Russia need only tax some oligarchs. All human endeavor boils down to allocation of resources, i.e. economics, and somehow the question is always "But who will bell the fat cat?"

Before every endeavor we whine "But who's going to pay for this?" After, we scream "Who can we burn at the stake for our failure to invest sufficient resources?"

Today, I am grateful not to be a high level official at Roscosmos.
 
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31 (42 / -11)

markgo

Ars Praefectus
3,923
Subscriptor++
Not wanting to jinx it by saying it loud, but I am still hoping for a nice and very energetic lithobraking manoeuvre from Luna 25. Just losing comms with it still being in the pre‑landing orbit would be kinda anti‑climatic!

That would serve them right, IMO. Although I am pretty sure TASS would still try to twist a high‑speed lithobraking crash event into a "very successful landing" somehow...

🎼🎶🎵

This was a triumph!
I'm making a note here
Huge success!

It's hard to overstate
My satisfaction
 
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20 (24 / -4)

ESADCALI84

Smack-Fu Master, in training
1
For those who made a negative comment about Russia, the Russian space program, the Russian invasion of a free country, you all have earned an upvote. The others? You've earned my downvote.

Russia is evil and the rest of the free world should collectively eject them from current and future participation in the ISS. Kick them off and absolutely no funds for space-based programs go to them from this moment forward.

Russia, Putin, they are evil. Screw Russia.

Edit: It crashed into the moon.

Screw Russia. They spent money they didn't have building junk, crap, junk.

Russia, build more. Lots more. The more you build the less money you have for bombs for murdering the people of Ukraine.

P.S. For those who decided to downvote me, you have decided to side with Russia, an evil citizenry who's collectively decided to murder its neighbors.

So, screw you too.
1000004512.jpg
 
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David Marsh

Smack-Fu Master, in training
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That seems very misleading. The moon is visible over Russia 12 hours per day, just like everywhere else in the world. Russia's lack of access to the US's Deep Space Network means they don't have 24 hour a day visibility, but I wouldn't call 12 hours a day "relatively few". Tilley's post was clear but the characterization of it in the article is misleading.
If the probe is in lunar orbit, it will also be behind the moon half the time. That would cut communication opportunities to six hours an earth day.
 
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Sadly, the missile sent towards Chernihiv hit its target and successfully killed 100 civilians including children. If only that one was as faulty as Luna-25.
As much abhorrent as thar strike was, please let's keep the numbers straight: the last official toll was around 7 civilians killed and 117 wounded so far. Which is a lot by any count, obviously, and quite inexcusable. The numbers might change yet, of course – probably quite a bit upwards, unfortunately, but please let's keep it official.
 
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talon_262

Ars Scholae Palatinae
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I was just listening to a podcast about how terrible satellite security often is, and how trivial it is for ordinary people to get access to ground stations - you can literally rent time on a GS network from Amazon or Microsoft.

It's doubtful, but not impossible, that someone took advantage of downtime and sent disruptive commands to the spacecraft. If it broadcasts a rickroll or the bayractar song before crashing, I'm gonna cheer.

note: let me just say this is VERY doubtful. Russia doesn't need any help to fuck things up, and space is hard.
Eduard Khil's "Trololo Song" would be the perfect chef's kiss...
 
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Can't even conquer Ukraine, and you expect to conquer the moon?...

Seriously, I was feeling bad for the scientists for a moment , but got over it. Like athletes barred from international competitions, they are not just practicing their passion in their isolation. They are in charge of boosting the pride of a monstrous regime, which is funding them for it. If you tie yourself to that regime, you're going to take what's coming to you.
 
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fcrary

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17,275
Oh no. Not again.

Reuters is reporting that the Russians are reporting that the craft was hit by a micrometeorite.
Some people here at my university need to pay attention to this. They build instruments to measure micrometeorites and dust in space. They really need to get working on this unknown Russian technology which seems to increase the flux of micrometeorites to many orders of magnitude above natural values.
 
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fcrary

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Obviously this failed. Ruzzia does not have the tech to go to the moon. Hell, they can barely make a progress capsule that doesn't have holes in it. Their only tech is ancient soviet stuff and that's not going to cut it for a complex mission like that.
I'd say this mission was well within the capabilities of the Soviet Union. Which says something about the current Russian capabilities.
 
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Nilt

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Serious question: say for the sake of argument it's in orbit, but tumbling. And that Russia can't reestablish comms with it. So it just keeps orbiting the moon for, like, ever, in the way and useless, as micro-meteors slowly nibble away at it?
Most likely not. Most lunar orbits are rather unstable. I haven't seen much on what's likely with this one, though, and I have Baldur's Gate 3 to play rather than look it up. :p
 
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fcrary

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Not saying that this is what happened, but this kinds of missions that receive commands from Earth, what kind of protections do they have for malicious actors? Could somebody with a powerful transmitter send a replay attack to this spacecraft?
No. Unless the Russians are insane and incompetent (and, I guess that's a possibility given the former head of Roscosmos, among other things...) that can't happen. The command dictionary would be restricted if not classified, and there would be back-and-forth verification that the commands were correctly received. I wouldn't say pirating a spacecraft is impossible, but it would take a lot of resources, both hacking the operator's ground system and having some deep space antennas. I don't think there are even half a dozen countries who could do it, and none care enough to risk the political fallout if they got caught.
 
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fcrary

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I was just listening to a podcast about how terrible satellite security often is, and how trivial it is for ordinary people to get access to ground stations - you can literally rent time on a GS network from Amazon or Microsoft.

It's doubtful, but not impossible, that someone took advantage of downtime and sent disruptive commands to the spacecraft. If it broadcasts a rickroll or the bayractar song before crashing, I'm gonna cheer.

note: let me just say this is VERY doubtful. Russia doesn't need any help to fuck things up, and space is hard.
Those are generally commercial satellites. For something like JPL's operations network, you very definitely can't rent an account from Amazon. Their security is less impressive than they claim, but it's not that bad. I would expect the Russians to be even more paranoid about things like that, although they gap between claims and reality is probably greater.
 
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Serious question: say for the sake of argument it's in orbit, but tumbling. And that Russia can't reestablish comms with it. So it just keeps orbiting the moon for, like, ever, in the way and useless, as micro-meteors slowly nibble away at it?
Lunar orbits aren't all that stable, because the moon is lumpy.
 
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fcrary

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In low Earth orbit. That's easy. When my lab had some communications problems with a CubeSat, we actually got some help from a ham radio hobbyist who lived farther from ground-based interference than the antenna on our building's roof. But even the Moon is much farther away and communications require things like big, directional antennas. Which are, for all practical purposes, at least, mid-range radio telescopes.
 
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fcrary

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They also have a comm ship in the Pacific, so more like 24 hours.
Do they? I know the Soviets had several such ships. But I thought they most capable one (Nedelin class, I think) were retired long ago and not replaced. What sort of ship-based, deep space communications assets do the Russians currently have?
 
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