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BepiColombo Status
Hungry4info
post Sep 23 2012, 03:54 PM
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MESSENGER had three Mercury flybys.


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MarcF
post Sep 23 2012, 03:54 PM
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QUOTE (Doug M. @ Sep 23 2012, 03:41 PM) *
Seven! flybys! That has to be a record. MESSENGER only had three -- one each with Mercury, Venus, and Earth.

And that's while using an ion drive. I know the delta-V to climb down to Mercury is really high, but still...


Weren't there 3 Mercury flybys ?
Best Regards,
Marc.

Oups, thanks Hungry4info, posted at the same moment !!
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Gsnorgathon
post Sep 23 2012, 04:28 PM
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Plus two Venus flybys.
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Doug M.
post Sep 23 2012, 04:32 PM
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You're right! My bad. I seem to have confused "three Mercury flybys" with three total.

That said, seven still looks like a new record.


Doug M.
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Paolo
post Dec 29 2013, 08:46 PM
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looks like BepiColombo has been delayed again... to July 2016 this time
http://sci.esa.int/bepicolombo/47346-fact-sheet/
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Explorer1
post Dec 30 2013, 12:19 AM
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Eight flybys! Now that's a record for sure!
Still a pity about the cancelled lander, but you can't have everything I suppose. Looks like a far lower orbit than even MESSENGER can manage, so not as much a repeat as I thought before...
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djellison
post Dec 30 2013, 01:07 AM
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QUOTE (Explorer1 @ Dec 29 2013, 04:19 PM) *
Looks like a far lower orbit than even MESSENGER can manage, so not as much a repeat as I thought before...


At apoapsis perhaps - but that's typically when you're transmitting back to Earth, not doing science. Look at periapsis. MESSENGER's nominal peripasis is 200km - half that of the nominal 400km of the MPO component of B-C. Moreover - the MESSENGER team hope to operate their spacecraft at altitudes significantly lower than 200km if they continue operations for a further extension - perhaps 25km or lower.

And 8 flybys only exceeds the 7 of Rosetta by 1. ( 3 x Earth. 1 x Mars. 2 x Asteroids. )
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dtolman
post Dec 30 2013, 03:50 AM
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Lander? Wasn't that cancelled before it was even green-lit years ago?

Guess the delay works out for more continuous coverage of Mercury between the US and the EU.
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Explorer1
post Dec 30 2013, 04:09 AM
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Yes, I've know of MESSENGER's possible extension, but I was mostly concerned about redundant imaging. The cameras will obviously be more modern (a relative term once they arrive in 2024), plus if new craters appear in areas of double coverage, it will be even more impressive!
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machi
post Dec 30 2013, 10:57 AM
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QUOTE (Explorer1 @ Dec 30 2013, 01:19 AM) *
Looks like a far lower orbit than even MESSENGER can manage, so not as much a repeat as I thought before...


In most areas it's not a repeat of MESSENGER. Cameras can do regularly imaging at 5m/pix from 400 km and in color (MESSENGER only BW). High resolution imaging of the south polar region will be possible. They have stereo cameras. Laser altimeter can do topographic map for whole planet (MESSENGER only north hemisphere). X-ray spectrometers has higher resolution. Bepi-Colombo has thermal infrared spectrometer and another instruments, which are not on MESSENGER. It's two spacecraft mission!
And so on.



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djellison
post Dec 30 2013, 02:48 PM
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QUOTE (machi @ Dec 30 2013, 02:57 AM) *
(MESSENGER only BW).


Untrue. The MDIS system has filters wheels for color imaging - hence, for example - http://messenger.jhuapl.edu/gallery/scienc...p?image_id=1226


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machi
post Dec 30 2013, 02:59 PM
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Sorry, I wrote that poorly. I meant that BepiColombo has high-resolution (~5 m/pix at best) color imaging capability with narrow angle camera (HRIC). MESSENGER has color capability, but only at lower resolution with MDIS WAC camera. MESSENGER's NAC camera can do images with similar resolution as HRIC (this is because of lower perigee) but only in BW.


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Explorer1
post Jan 5 2015, 07:08 PM
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Hardware testing for the vacuum of space has now begun:

https://www.youtube.com/watch?v=z6Fsl8am3QA
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Doug M.
post Apr 2 2015, 06:16 PM
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Does anyone know what the current estimate is for BepiColombo's arrival at Mercury? Their site still says 2024, but with the repeated launch delays that seems a bit optimistic. Is there any more recent information?


Doug M.
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Paolo
post Apr 2 2015, 06:49 PM
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according to this ESA release:

QUOTE
Nevertheless, BepiColombo will still arrive at Mercury at the same time (January 2024) as if launched in mid-2016.
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