PROCYON is in the right trajectory too; the initial operations phase has begun.
http://www.spacedaily.com/reports/Flight_Status_of_Micro_Deep_Space_Explorer_PROCYON_999.html
Maybe PROCYON soon needs its own thread.
Next to the http://global.jaxa.jp/press/2014/12/20141204_procyon.html, already mentioned above in the spacedaily article, it also has a https://www.facebook.com/procyon.spacecraft.
Some posts are in english, but goole translate helped me with the interesing other statements the last days, that the three-axis attitude control system was successfully tested by starting the RCS. The post is illustrated with some nice https://scontent-b-fra.xx.fbcdn.net/hphotos-xfp1/l/t31.0-8/10847392_1484173775154698_7721623926780413929_o.jpg that shows housekeeping data.
The last post shows the calibration test for the attitude control, with an initial "oversteering" of a deliberate change of 10° from the sun orientation and then as google translate says: "I was able to direct the clean attitude of goal without having to vibration as "After" in Figure!!!" Picture https://fbcdn-sphotos-f-a.akamaihd.net/hphotos-ak-xap1/t31.0-8/10827948_1485796134992462_7826870956922972461_o.jpg.
I think it's really nice to have such direct reports from the team and the spacecraft. I remember that from other japanese missions, like the blog from the IKAROS mission.
Good idea for a separate thread for PROCYON; I've made one here.
http://t.co/0pUhWippoy, as well as https://t.co/dYqv6rf3OW: 2000 DP107, 2010 LJ14 and 2002 AJ29. Via Twitter, radio astronomer Michael Busch says that 2000 DP107 is a binary asteroid studied extensively by radar in work led by Shantanu Naidu and Jean-Luc Margot.
Can't even edit my post, already a new thread
What I wanted to add:
I somehow miss the LAICA camera system in all PROCYON images and articles. It only shows in some functional block diagrams. Was the "Observation of Geocorona using Lyman Alpha Imaging CAmera" just a proposal, or is it on board the spacecraft? I wonders, since the observation time is said to be 1-2 weeks afer launch in the http://www.unmannedspaceflight.com/index.php?s=&showtopic=4920&view=findpost&p=211781 translated by pandaneko. Thanks btw.
Some other good articles about PROCYON on http://www.spaceflight101.com/h-iia-f26-secondary-payloads.html (also about ArtSat and Shin'en2) and very extensive one on https://directory.eoportal.org/web/eoportal/satellite-missions/p/procyon, but all are missing LAICA.
I tried searching for information about the camera carried by PROCYON, but I couldn't find anything too clear about it. What resolution does it have?
PROCYON status digest from FB as follows. P
9 December
Reporting on status on 8th.
Travelling at 2.2 million km from earth, it takes 7 seconds for the signals
to reach PROCYON.
We made adjustments to the 3 axix attitude control system and
we are now able to point PROCYON in any ditrection we want, like
pointing the medium gain antenna to earth.
10 December
Almost a week from launch. PROCYON is healthy, but far away. Unless we communicate slowly line is
corrupted by noise. Comms. rate has been 2kbps, from PROCYON.
Today's testing was on the medium gain antenna. We made it and are now able to use
16kbps, still as slow as 1/1000 of smart phone comms.
Yesterday
PROCYON operation stopped during 12-14 December. During this period PROCYON passed through
a region of very strong solar winds. You can get information on solar winds on
http://www.swpc.noaa.gov/products/wsa-enlil-solar-wind-prediction
PROCYON is currently at 4 million km from earth.
If I get that right in this Japanese article 2000 DP 107 has been offically announced as the primary candidate target asteroid:
http://senews.jp/satellite/2015/04/07/528
Two for the price of one, nice! Short rotation rate on the primary too; it should be possible to see the whole area during the flyby?
everything you wanted to know about PROCYON's target: http://arxiv.org/abs/1503.01743
I have been looking at PROCYON's FB, at least once/week to see what is going on.
I must say I am very unhappy. Only today I learnt through my GOOGLE alert that
JAXA and Tokyo University had a joint press meeting on 6 April to say that
the engine had stopped running.
No mention of when the engine stopped. Does anybody know anything?
No wonder no progress report in their FB. P
the link that katodomo posted above says engine stopped in mid-March after 223 hours in total. they expect (hope for?) recovery by end of April
from this image of the press event, flyby would be on 12 May 2016
http://image.itmedia.co.jp/mn/articles/1504/10/l_hi_P1300584.jpg
there is also http://monoist.atmarkit.co.jp/mn/articles/1504/10/news045.html, but with little or no new informations
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
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!
asteroid flyby abandoned
http://www.jiji.com/jc/c?g=soc&k=2015050800602
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).
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/
here is some work for Pandaneko! PROCYON observes the hydrogen coma of Churyumov-Gerasimenko
https://www.rikkyo.ac.jp/news/2015/10/16852/
Procyon has been observing the Earth recently, heading for a distant flyby in early December. A couple of images from https://www.facebook.com/procyon.spacecraft/?fref=ts
contact with PROCYON has apparently been lost after the distant Earth flyby
http://www.isas.jaxa.jp/j/topics/topics/2015/1211.shtml
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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