Fire in the Sky
The explosion happened on 3 February due to a sudden temperature spike, although the event has only just come to light.
However, talking to MailOnline, Nasa and Esa said the catastrophic event posed no significant risk to other satellites in Earth orbit.
The previously unknown incident was revealed by Space News, after posing questions to Air Force Space Command.
Known as the Defense Meteorological Satellite Program Flight 13 (DMSP-F13), it was launched back in 1995 and had remained in operation until now.
This made it the oldest continuously operational satellite in this particular series of satellites.
Exactly what has happened to the satellite, though, is still not clear, with the temperature strike remaining a mystery.
Air Force Space Command said the power subsystem experienced 'a sudden spike in temperature'.
This was followed by 'an unrecoverable loss of altitude control', before pieces of debris were then spotted in the vicinity of the satellite - suggesting it had partially, or completely, exploded.
Six other DMSP satellites are in orbit, while a seventh is scheduled to launch in 2016.
The Air Force played down the significance of the event, and said that the loss of the satellite - which had been retired to a back-up role - would not be detrimental to any of their operations.
'Because this satellite was no longer used by the National Weather Service or the Air Force Weather Agency, the impact of the loss of this satellite is minimal,' the Air Force told Space News.
'We anticipate real-time weather data for tactical users will be slightly reduced without this satellite, but its data was not being used for weather forecast modelling.'
However, the main fear from such an event is the increase in the amount of debris into Earth orbit.
Previous explosions in orbit, most notably the accidental collision of a US Iridium satellite and a defunct Russian Cosmos satellite in 2009, have released hundreds of pieces of debris into orbit.
Another notable event was a Chinese anti-satellite missile test in 2007, when they blew up one of their own satellites, which was widely condemned.
This raises the risk of a collision in future, and even the ISS occasionally has to perform manoeuvres to avoid space debris.
But speaking to MailOnline, Nasa and Esa played down the risk of any potential issue.
'If the reported fragment numbers are stable, then the event is not considered major,' said Dr Holger Krag, Head of Esa's Space Debris Office.
'What makes this event special is that the break-up obviously happened while the satellite was still operational.'
Dr Krag noted that the explosion occurred above 500 miles (800km), where few other satellites were in orbit.
Indeed, Esa's closest mission is Cryosat-2, at an altitude of 450 miles (720km), so Dr Krag said they 'do not expect any meaningful risk increase due to this event.'
Dr Eugene Stansbery, Program Manager of Nasa's Orbital Debris Program Office, added: 'The debris cloud from this event is obviously much smaller than the Chinese ASAT test of 2007 or the Iridium/Cosmos collision of 2009.
'We have collected additional measurements to more fully characterize the event, but the data has not been processed yet.
'Depending on what size you go down to, there are many thousands to millions of debris in orbit. This is a small increase to an existing risk to other spacecraft.'
US Strategic Command has not yet responded to a request from MailOnline regarding whether the defect that caused this satellite to blow up could affect other similar satellites.
Comment: Interestingly, on the same date a fireball was seen over the UK: Fireball meteor captured on camera over York, UK
Reader Comments
Speculative I know, but look at the recent space debris explanation used for the increase sightings of fireballs, serving to divert peoples attention from the real dangers. A similar pattern maybe?
I find ISS altitude curiously low at 400km, safely inside the protective shielding of Earth's ionosphere. Compared to satellites, the panel surface of ISS is large it must have a lot of unreported minor accidents that don't find their way into the mainstream media.
How frequently does the navy record satellite losses and puncture / partial equipment failure by space rocks?
[Link]
To summarize what we've been told:
1) It was an old satellite with no present value
2) It was in a high enough orbit that the space-junk from its destruction is inconsequential
3) The power system experienced a sudden rise in temperature
4) ... Followed by loss of control
5) ... Followed by disintegtation of the satellite
IF all that's true, it sounds a whole lot like someone was testing or demonstrating their directed energy weapon capability.
See: [Link]
Could it be that the satellite really had an additional capability, say such as a directed energy weapon. Maybe said satellite was directing that energy against an object of superior technology, foolishly, and said object redirected the energy back to the source, hence the rapid heating just before disintegration... Nah...just a thought!
But I saw an actual fireball this evening, or at least its trail which was quite short (I missed the head behind a roof) but broad, perhaps 50-100% of the lunar diameter. In view for perhaps 1-1.5 seconds and not far from London Gatwick. It was five minutes to the hour, 6:55pm (or maybe 7:55pm) heading Westish. Must have been seen by thousands as the yellow incandescent tail was very bright. The first fireball I have ever seen. Nowhere near as impressive as a mega-asteroid of course.
Nothing to see here people, just another mechanical failure two weeks after the warranty ended
They seem to be a bit slow in blaming Global warming for this explosion!
Maybe it was not a malfunction, maybe it was an ASAT test.