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PROCYON, Small satellite asteroid flyby launched with Hayabusa 2
pandaneko
post Apr 11 2015, 12:42 AM
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Thanks, Paolo and Katodomo

What follows has been extracted from Katodomo's Senews and Paolo's Monoist. Only portions
new to me.

The target of PROCYON is now set to "2000 DP107" which is a doublet. 800m and 300m.
Consequently, PROCYON will not be able to return to near earth orbiut to perform a
swingby. So, only chance of asteroid approach. The earth swingby is December 2015 and
asteroid passby is May 2016.

Norminal mission has been accomplished. Solar pannels are OK, temps are OK,
triaxial control is OK. It is very much alive.

Ion engine stopped in midMarch 2015, trying to restart, but no indication yet of
recovery at the moment.

The cause of this has not been identified yet, but the most likely reason is thought to be
that minute metal piece has migrated into the gap between the 2 ion grids of the ion source.

Therefore, several options have been identified, as follows.

1. Give this grid a thermal cycle of expansion and contraction.
2. Give the probe an acceleration and rotate, stop, rotate, stop etc.
3. Apply high voltage and brun out the meal piece.
 
Theseoptions will be tried carefully. However, the deadline for recovery is currently
end April 2015 in time for the earth swingby in December 2015. This deadline is
also being re-evaluated for accuracy.

In the meantime, geo-corona image aqquisition has been successful.
The image has not been made available as theses are being written at the moment.

Above are the gists of what are available at the moment. P
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Paolo
post Apr 11 2015, 06:10 AM
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thanks a lot pandaneko! I always value you translations. a lot of these informations were lost when trying to make sense of the machine translation!
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Paolo
post May 8 2015, 06:21 PM
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asteroid flyby abandoned sad.gif
http://www.jiji.com/jc/c?g=soc&k=2015050800602
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Explorer1
post May 10 2015, 02:53 AM
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What about the Earth flyby in December, is that still happening? Even distant observations would be a good test of the systems (and look cool too).
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Paolo
post May 10 2015, 07:01 AM
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I guess they are in an orbit that will get PROCYON somewhere near Earth in December anyway (a few million km, probably). If I understand this other news report, observations of the Earth's geocorona are to continue
http://news.mynavi.jp/news/2015/05/08/512/
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Paolo
post Oct 14 2015, 07:08 AM
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here is some work for Pandaneko! PROCYON observes the hydrogen coma of Churyumov-Gerasimenko
https://www.rikkyo.ac.jp/news/2015/10/16852/
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Paolo
post Nov 18 2015, 11:48 AM
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Procyon has been observing the Earth recently, heading for a distant flyby in early December. A couple of images from their Facebook page
Attached thumbnail(s)
Attached Image
Attached Image
 
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Paolo
post Dec 11 2015, 07:30 AM
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contact with PROCYON has apparently been lost after the distant Earth flyby
http://www.isas.jaxa.jp/j/topics/topics/2015/1211.shtml
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Explorer1
post Jan 25 2017, 04:49 PM
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Luckily, some distant observations were made of 67P before, not bad for a tiny spacecraft! (link to new paper at the bottom) http://www.centauri-dreams.org/?p=37012
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