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Comet Siding Spring Mars encounter: One Mars Express plan becomes two

Posted by ESA Mars Express Team on 2014/09/17 10:44 CDT | 2 comments

The Mars Express Flight Control Team at ESOC have been actively preparing for the flyby of comet C/2013 A1/Siding Spring on October 19. Initial estimates gave the possibility that Mars Express might be hit by 2 or 3 high-speed particles. Happily, additional observations by ground and space telescopes have shown the risk to be much lower – and perhaps even as low as zero. In today's blog post, the team explain how this (happy!) real-life, real-time development is affecting their preparations for fly-by.

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So Close and Yet So Far: Why isn't Siding Spring going to sandblast Mars?

Posted by Tony Farnham on 2014/09/09 09:02 CDT | 5 comments

Comet Siding Spring is going to make a very close approach to Mars in October. Any comet dust that reaches Mars has the potential to inflict significant damage on the spacecraft orbiting the planet. As it turns out, however, Mars and its orbiters are likely to see very few, if any, impacts. Why?

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Comet Flyby Missions for Mars Rovers

Posted by Mark Lemmon on 2014/08/21 10:19 CDT | 2 comments

On October 19, the Mars rovers — like their orbiting cousins — will become comet flyby missions. Comet C/2013 A1 (Siding Spring) will pass within 140,000 km of Mars.

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Mars orbiters plan for their October encounter with comet Siding Spring

Posted by Emily Lakdawalla on 2014/08/13 06:00 CDT | 2 comments

Now that we have reasonable confidence that our Mars orbiters will be safe from the close passage of comet Siding Spring, we are free to be excited about the opportunity that the encounter represents. At a community workshop on August 11, representatives from Mars missions shared their plans for great comet science.

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Comet Siding Spring: Risk Assessment

Posted by Karl Battams on 2014/08/07 01:29 CDT | 6 comments

On October 19, 2014, Comet Siding Spring is going to have an extremely close encounter with the planet Mars. The bottom line: it seems most likely that our Martian spacecraft will be absolutely fine.

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Opposition time for Mars, and several months of dancing with the stars

Posted by ESA Mars Express Team on 2014/04/08 08:47 CDT | 1 comment

The Mars Express team showcases some of the best viewing opportunities of Mars in 2014, including how to spot Comet Siding Spring when it flies past Mars this October.

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Comet Siding Spring Mars encounter: Cosmic bully spotted by ESA and NASA

Posted by ESA Mars Express Team on 2014/03/31 05:46 CDT

Hubble has taken some great new images of our 'friend,' Comet Siding Spring, due to pass by Mars at less than 136,000 km on October 19 – less than half the distance between Earth and our moon.

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Comet Siding Spring Mars encounter: Ya gotta have a little ‘tude

Posted by ESA Mars Express Team on 2014/03/24 03:44 CDT

In the latest update on how the Mars Express flight control team is planning to deal with Comet Siding Spring is all about attitude -- and hiding behind the biggest guy in the fight.

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Comet Siding Spring Mars encounter: How to determine the orbit of a comet?

Posted by ESA Mars Express Team on 2014/03/12 02:02 CDT | 2 comments

In the quest to track Comet Siding Spring, the Mars Express team tells us how computing the orbit of a comet isn't as straightforward as science fiction would have us believe.

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Hypervelocity Cratering and Riding Out the Risk

Posted by ESA Mars Express Team on 2014/03/06 07:34 CST

Today's update from the Mars Express team contains the realisation that, for some of the risks associated with October's Siding Spring flyby, there may not be much the team can do.

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Space is really, really big – except sometimes it isn’t

Posted by ESA Mars Express Team on 2014/03/04 11:19 CST

Here's the next installment in the continuing story of how the Mars Express team is preparing for Comet Siding Spring flyby, 19 October 2014. This week: introducing the spacecraft's subsystems and structure – and wondering how we can absorb impacts.

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Comet Siding Spring Mars encounter: Why orienting Mars Express is the heart of the challenge

Posted by ESA Mars Express Team on 2014/02/28 12:25 CST

Today's post continues where we started last week with an update from the Mars Express Flight Control Team at ESOC on their preparations for the 19 October Comet Siding Springs flyby. Today: defining the challenge!

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Mars Express team readies for Siding Spring

Posted by ESA Mars Express Team on 2014/02/26 01:31 CST | 3 comments

On Sunday, 19 October 2014, at around 18:30 UTC, comet C/2013 A1 – known widely as 'Siding Spring' after the Australian observatory where it was discovered in January 2013 – will make a close fly-by of Mars.

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A new comet observing campaign for C/2013 A1 (Siding Spring)
You thought you were rid of us...but we're baa-aaack!

Posted by Karl Battams on 2014/01/27 11:22 CST | 1 comment

You thought you were rid of us...but we're back! Following the spectacular and, quite frankly unprecedented, success of the Comet ISON Observing Campaign, we are launching a similar venture for another unique cometary encounter that's happening this year. In October 2014, comet C/2013 A1 (Siding Spring) will pass extremely close to Mars.

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Will comet Siding Spring make a meteor shower on Mars?

Posted by Emily Lakdawalla on 2013/03/05 04:34 CST | 6 comments

JPL's Solar System Dynamics group shows that there is still a possibility that C/2013 A1 (Siding Spring) could hit Mars. But the uncertainty in its position at that time is large -- the closest approach could happen an hour earlier, or an hour later -- so we're a long way from knowing yet whether it will or (more likely) won't impact.

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Comet to whiz past Mars in October 2014

Posted by Emily Lakdawalla on 2013/02/27 05:36 CST | 22 comments

A recently discovered comet, C/2013 A1 (Siding Spring), is going to be passing very close to Mars on October 19, 2014. Does it pose a risk to spacecraft?

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