Two satellites might be headed for a collision — and there's no way to stop them
- There is a 1-in-100 chance that two defunct satellites — IRAS and GGSE 4 — will collide.
- There’s no way for scientists to stop the collision since they can’t send signals to conduct evasive manoeuvres.
- More than the actual collision, the resulting debris is a bigger threat.
The Infrared Astronomical Satellite (IRAS) and the Gravity Gradient Stabilisation Experiment (GGSE 4) will be travelling at over 14 kilometres per second (kph). According to LeoLabs, there’s one in 100 chance that they will collide. At best, it will be a near miss as they pass each other at a distance of 15 to 30 meters.
The satellite-tracking company predicts that the close approach will occur on Wednesday evening over Pittsburgh in the US.
2/ On Jan 29 at 23:39:35 UTC, these two objects will pass close by one another at a relative velocity of 14.7 km/s… https://t.co/sLerPXQqc7— LeoLabs, Inc. (@LeoLabs_Space) 1580160604000
Why can’t we stop them?
Since both the satellites are now defunct, there’s no way for scientists on Earth to communicate with them — or send signals for evasive manoeuvers.
It should be noted that, in the past, space agencies have conducted evasive manoeuvres even when satellites were over 60 kilometres apart. IRAS and GGSE 4 will be much closer — and one has a better chance of obliterating the other. IRAS is massive and weighs 1,083 kilos. In comparison, the GGSE 4 is only 4.5 kilos.
If the two satellites do go bump in the night, the collision itself might not be the most destructive aspect of the equation.
The resulting debris from the event could linger and travel for decades to come, threatening the existence of other satellites — including ones that currently functional and play critical roles. This was the same concern expressed by experts when India conducted its first anti-satellite (ASAT) test — Mission Shakti — last year.
However, anyone who’s down here on Earth will be safe. Any debris that might fall to Earth is likely to burn up in the atmosphere upon re-entry.
The bigger concern is what this means for the future as Earth’s orbit gets more congested. For instance, the initial plans for Elon Musk’s SpaceX Starlink constellation consist of nearly 12,000 satellites — which pending proposals for another 30,000.
To put that in perspective, there are a little over 2,000 satellites in orbit right now. Taking into account other space junk and inactive satellites, the total amount of objects is still only around 23,000.
In the near future, that amount will — at minimum — double.
India doesn't trust US with measuring space debris — and so it will set up its own agency
Europe wants to use a suicidal robot to clean up space — one satellite at a time
US, Russia and China with space debris in the thousands are complaining about 49 pieces from India's A-SAT test
Popular on BI
- I'm a 56-year-old IT worker who got laid off last year and have been unemployed ever since. I have a hunch I'm not finding work due to ageism. How do I prove it?
- WhatsApp introduces the “Message Yourself” feature, working on voice status updates and more
- DeSantis says Congress should act if Apple follows through on Elon Musk claims and bans Twitter from App Store
- India Inc.’s rockstars of Q2 and things that investors should look out for, according to analysts
- Best refrigerator under ₹15000
- Asus ROG Phone 6 review: A bit more than just gaming
- Fintech unicorn CRED to acquire SaaS startup CreditVidya
- Jio Haptik and CASHe partner to deliver instant credit lines on Whatsapp