forum.kosmonautix.cz

Amatérský pozorovatel z Arizony popisuje rotaci Hitomi - http://www.satobs.org/seesat/Mar-2016/0176.html
Během pozorování proběhlo asi 5 otoček s periodou 10 vteřin, menší maximam pak každých 5 vteřin.

Sadly, the spacecraft is no more:
JSpOC ‏@JointSpaceOps 11m11 minutes ago
Update: Analysis shows ASTRO H breakup occurred 26Mar @ 0142z
+/- 11mins. JSpOC confirmed breakup @ 0820z. @JAXA_en @SpaceTrackOrg

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Jonathan McDowell ‏@planet4589
"Debris" doesn't mean Hitomi's in little pieces. It means little pieces
have come off it. Satellite might be basically intact,we don't know

JAXA also reported that they have brief contacts with it after the original "breakup" time, and certain did have contact after the revised "breakup" time since they lost contact at 07:45 UTC.

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PSA: When @JointSpaceOps says "breakup", don't mean what you or I would. If saw dandruff falling from your head they'd say you'd broken up.

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z twitteru, via nsf (doplnená časť infa)... tento a ďalšie príspevky
http://forum.nasaspaceflight.com/index. ... msg1508868

v skratke:
časti hitomi odleteli 26.3. 0142 utc... pravdepodobne nedošlo ku kompletnému zničeniu hitomi, len z neho odleteli nejaké časti... jaxa oznámila, že mala krátky kontakt s hitomi po tomto čase nehody

Změny jasnosti Hitomi:

Včera a dnes Jaxa zachytila 2x signál Hitomi. Bohužel krátký, takže se nepodařilo zjistiv stav detektoru.

Mar. 29, 2016 Updated

Current Status of Communication Anomaly of X-ray Astronomy Satellite “Hitomi” (ASTRO-H) (Mar. 29)

The Japan Aerospace Exploration Agency (JAXA) has been trying to communicate with the X-ray Astronomy Satellite “Hitomi” (ASTRO-H), using ground stations both in Japan and overseas.
By utilizing two opportunities of communicating with Hitomi, JAXA received signals from the satellite: the first time was at about 10:00 p.m. on 28 at the Uchinoura Ground Station, and the second one was at around 0:30 a.m. on 29 at the Santiago Tracking Station in Chile. JAXA has not been able to figure out the state of its health, as the time frames for receiving the signals were very short.

According to the U.S. Joint Space Operations Center (JSpOC), it is estimated that Hitomi separated to five pieces at about 10:42 a.m. In order to investigate the situation, JAXA is observing the objects, using a radar located at the Kamisaibara Space Guard Center (KSGC) and telescopes at the Bisei Space Guard Center (BSGC) owned by the Japan Space Forum. Up to now, the telescopes at BSGC detected two objects around the satellite’s original orbit, while the radar at KSGC identified one of them. It is confirmed that the signal received at the Santiago Tracking Station came from the orbital direction of the object identified at KSGC.
JAXA continues to investigate the relationship between the information announced by JSpOC and the communication anomaly.

JAXA will continue to do its best to recover communications with Hitomi and investigate the cause of the anomaly.

Možná není tak zle(?)...

Jonathan McDowell:
@astrolisa @JAXA_jp A few pieces flaked off. It's still mostly in one piece. Obviously the bits that came off were not fatal.

Emily Lakdawalla:
Hitomi #AstroH is not dead! Wonderful news!! A communicating spacecraft is a spacecraft that maybe can be saved!

Já to říkám pořád. Japonci jsou specialisti na záchranné akce ve vesmíru

Z dneška: http://sattrackcam.blogspot.cz/2016/03/ ... x-ray.html

http://satobs.org/seesat/Mar-2016/0196.html

Podle portálu spaceflightnow.com je téměř jisté, že problémy Hitomi nejsou způsobeny kolizí s cizím předmětem.

Dle SF101 byly včera 29.3 13:00 a 17:30 UTC zachyceny další signály z paluby Hitomi. Neuskutečnil se ale přenos dat.

IMHO je nezbytné zastavit tu zpropadenou rotaci než se vybijí baterie. I tak si myslím z toho kouká max, nějaký částečný náhradní program.

http://spaceflight101.com/h-iia-astro-h ... ugh-space/

Tak další zprávy říká, že se by snad mohlo být možné rotaci zastavit, zdá se že došlo k nějaké komunikaci, alespoň dle tweetu Emily Lakdawalla z Planetary Society. Pozorované úlomky prý nejsou nic podstatného, měl by to být údajně jenom led. Držím palce.

https://www.newscientist.com/article/20 ... ush-HITOMI