Russian Poison From The Sky

This time, it’s the Russian’s turn to randomly drop a spacecraft to Earth from orbit, only this one is loaded up with ten tons of highly toxic chemicals. When you duck, don’t forget your umbrella.

Toxic Russian Mars Probe Heads Back to Earth

It’s hard to believe that only last week we were getting excited for Russia’s first interplanetary mission in 15 years to launch. By now, we should be happy in the knowledge that the ambitious — and awesome — mission is powering through space, toward the Martian moon Phobos.

The reality is that we are now discussing uncontrolled reentry scenarios.

As if that wasn’t enough bad news, we are looking at an uncontrolled toxic reentry scenario. Phobos-Grunt — correctly written “Fobos-Grunt,” meaning “Phobos-Soil” or “Phobos-Ground” — is fully-laden with unsymmetrical dimethylhydrazine and nitrogen tetroxide; that’s ten tons of fuel and oxidizer. The probe itself weighs-in at only three tons.

The majority of the fuel will likely vaporize during reentry, but everyone will be hoping for a splash-down in an ocean (which covers two-thirds of Earth, fortunately), as the wreckage will still be hazardous. There’s also a small quantity of radioactive cobalt-57 in one of the science missions housed in the probe — a fact that will most likely cause a media frenzy.

It is for these reasons that the Russian media is dubbing Phobos-Grunt “Most toxic falling satellite ever.”

See also:
Russia’s Phobos-Grunt Spacecraft Goes AWOL
Russian Mars Probe Will Likely Come Crashing Back to Earth
Toxic Russian Mars Probe Likely Heading Back to Earth
Mood grim over Mars probe faultRussia Running Out Of Time, As Mars Mission Seems Destined To Fail
Report: Russians Believe Martian Moon Probe is ‘Lost’
Source: Russian Space Probe Unlikely to be Saved
Phobos-Grunt Mars probe remains silent in Earth orbit
Now Russians can’t even contact their busted Mars probe
Contact with Russian Mars probe ‘unlikely’ – expert
Failed Russian space mission shows difficulty of exploring Mars
Salvaging Science from Stricken Mars Moon Probe: A Scientist’s View
Phobos-Grunt mission
Fobos-Grunt

Man, the Russians just can’t catch a break. This is their fourth launch failure just this year and now they’re 0 for 18 at Mars missions.

/and we trust the Russians with our U.S. astronauts, it makes me nervous

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Partly Cloudy With A Chance Of Falling Satellites

Here we go again, this time it’s the German’s turn to randomly drop [expletive deleted] from orbit.

Falling German Satellite Poses 1-in-2,000 Risk of Striking Someone This Month

A big German satellite near the end of life is expected to plunge back to Earth this month, just weeks after a NASA satellite fell from orbit, and where this latest piece of space junk will hit is a mystery.

The 2.4-ton spacecraft, Germany’s Roentgen Satellite (ROSAT), is expected to fall Oct. 22 or 23.

The satellite will break up into fragments, some of which will disintegrate due to intense re-entry heat. But studies predict that about 1.6 tons of satellite leftovers could reach the Earth’s surface. That’s nearly half ROSAT’s entire mass.

There is a 1-in-2,000 chance that debris from the satellite could hit someone on Earth, though the likelihood of an injury is extremely remote, German space officials say. For German citizens, the risk of being struck is much lower, about 1 in 700,000.

All areas under the orbit of ROSAT, which extends to 53 degrees northern and southern latitude, could be in the strike zone of the satellite’s re-entry.

See also:
Falling ROSAT satellite to make reentry between Oct. 21 – 25
German satellite to plunge back to Earth
Huge German Space Junk Satellite To Fall To Earth Sooner Than Expected
Dead German satellite to fall on earth
Massive German satellite will fall to Earth this week
Duck and cover: ROSAT is the next re-entry
Reminder: ROSAT’s coming down soon
ROSAT expected to fall to Earth sometime this week, scientists say
German satellite set to fall to Earth
Not NASA but German Satellite will fall to Earth this weekend
Last chance to see doomed German satellite in night sky
Falling German Satellite Has a 1-in-2,000 Chance of Hitting Somebody
Track Germany’s Falling, 2.4-Ton Satellite in Real-Time
The ROSAT Mission
ROSAT

You’d think that by now, we’d have the technology to orbit powered drones with robotic arms that could guide these massive dead satellites into a controlled deorbit.

/joking about a 1 in 2000 chance of getting hit by tons of space junk moving at terminal velocity is all fun and games until someone actually gets hurt

Look Out Below!

As they say, what goes up, must come down. Round and round she goes, where she’ll hit, nobody knows.

Huge Defunct Satellite Falling to Earth Faster Than Expected, NASA Says

NASA space junk experts have refined the forecast for the anticipated death plunge of a giant satellite, with the U.S. space agency now predicting the 6 1/2-ton climate probe will plummet to Earth around Sept. 23, a day earlier than previously reported.

The defunct bus-size spacecraft is NASA’s Upper Atmospheric Research Satellite (UARS), which launched in 1991 and was shut down in 2005 after completing its mission. The satellite was expected to fall to Earth sometime this year, with experts initially pegging a weeks-long window between late September and early October, then narrowing it to the last week of this month.

. . .

NASA expects at least 26 large pieces of the massive satellite to survive the scorching temperatures of re-entry and reach Earth’s surface. Titanium pieces and onboard tanks could be among that debris, but the UARS satellite carries no toxic propellant (NASA used up all the fuel in 2005).

The debris is expected to fall over a swath of Earth about 500 miles (804 kilometers) long, NASA officials said.

There is a 1-in-3,200 chance of satellite debris hitting a person on the ground, odds that NASA says are extremely remote. Outside experts agree.

See also:
Dead NASA Satellite Falling From Space, But When & Where?
Space Satellite UARS Adrift and Heading for Earth
Nasa warns of fresh risk from £468m satellite falling from space
NASA Not Sure When, Where Falling Satellite Will Hit Earth
NASA Satellite Falling to Earth: Will You Be Hit?
Nasa satellite UARS nearing Earth ‘could land anywhere’
NASA is Deorbiting a Satellite, but They Don’t Know Exactly Where or When It’s Coming Down
The Sky is Falling As UARS Drops In
Keep Sept. 23 open: A satellite is heading our way
Six-ton NASA satellite to collide with Earth
NASA UARS satellite expected to crash to Earth

A 1 in 3,200 chance of a piece of debris hitting someone on the ground is extremely remote? Um, no, the chances of getting hit by lightening or winning the lottery are remote. 1 in 3,200 is like hey, don’t forget to duck.

/we have much larger satellites on orbit, let’s hope we never lose positive control of any of them, say as the result of a Chinese attack