PROCYON, Small satellite asteroid flyby launched with Hayabusa 2 |
PROCYON, Small satellite asteroid flyby launched with Hayabusa 2 |
Apr 11 2015, 12:42 AM
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#16
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Member Group: Members Posts: 817 Joined: 17-April 10 From: Kamakura, Japan Member No.: 5323 |
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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Apr 11 2015, 06:10 AM
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#17
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Senior Member Group: Members Posts: 1729 Joined: 3-August 06 From: 43° 35' 53" N 1° 26' 35" E Member No.: 1004 |
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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May 8 2015, 06:21 PM
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#18
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Senior Member Group: Members Posts: 1729 Joined: 3-August 06 From: 43° 35' 53" N 1° 26' 35" E Member No.: 1004 |
asteroid flyby abandoned
http://www.jiji.com/jc/c?g=soc&k=2015050800602 |
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May 10 2015, 02:53 AM
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#19
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Senior Member Group: Members Posts: 2113 Joined: 13-February 10 From: Ontario Member No.: 5221 |
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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May 10 2015, 07:01 AM
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#20
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Senior Member Group: Members Posts: 1729 Joined: 3-August 06 From: 43° 35' 53" N 1° 26' 35" E Member No.: 1004 |
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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Oct 14 2015, 07:08 AM
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#21
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Senior Member Group: Members Posts: 1729 Joined: 3-August 06 From: 43° 35' 53" N 1° 26' 35" E Member No.: 1004 |
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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Nov 18 2015, 11:48 AM
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#22
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Senior Member Group: Members Posts: 1729 Joined: 3-August 06 From: 43° 35' 53" N 1° 26' 35" E Member No.: 1004 |
Procyon has been observing the Earth recently, heading for a distant flyby in early December. A couple of images from their Facebook page
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Dec 11 2015, 07:30 AM
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#23
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Senior Member Group: Members Posts: 1729 Joined: 3-August 06 From: 43° 35' 53" N 1° 26' 35" E Member No.: 1004 |
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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Jan 25 2017, 04:49 PM
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#24
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Senior Member Group: Members Posts: 2113 Joined: 13-February 10 From: Ontario Member No.: 5221 |
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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