KAGUYA lunar explorer (aka SELENE) |
KAGUYA lunar explorer (aka SELENE) |
Oct 4 2007, 05:34 AM
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#76
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Member Group: Members Posts: 540 Joined: 25-October 05 From: California Member No.: 535 |
Typical western nonsense! As can clearly be seen in these JAXA photos the Earth has a disk shaped body and the pristine waterfalls are falling away from the spacecraft and not visible since the craft is going to the moon. How could I have been so blind??? So we won't know how the LOI went till 9:00 AM, JST on October 5...which would be 5:00 PM, PDT tomorrow. http://www.jaxa.jp/press/2007/10/20071004_kaguya_e.html -------------------- 2011 JPL Tweetup photos: http://www.rich-parno.com/aa_jpltweetup.html
http://human-spaceflight.blogspot.com |
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Oct 4 2007, 01:07 PM
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#77
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Solar System Cartographer Group: Members Posts: 10226 Joined: 5-April 05 From: Canada Member No.: 227 |
"At 5:55 a.m. on Thursday, a small engine was fired to change the probe's direction and speed and send it into an elliptical orbit around the moon's north and south poles. JAXA officials said the firing of the engine went well."
http://mdn.mainichi.jp/national/news/20071...0na036000c.html Phil -------------------- ... because the Solar System ain't gonna map itself.
Also to be found posting similar content on https://mastodon.social/@PhilStooke Maps for download (free PDF: https://upload.wikimedia.org/wikipedia/comm...Cartography.pdf NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain) |
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Oct 4 2007, 01:17 PM
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#78
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Member Group: Members Posts: 279 Joined: 19-August 07 Member No.: 3299 |
At the beginning, JAXA says that Kaguya is mainly as an experimental spacecraft to prove new technologies.. Thus, I presume that this is one of the low-profile public relations' reasons since this kind of mission has high risk of success. Hope, that all new technologies would run fine after many past setback lessons.
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Oct 4 2007, 06:36 PM
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#79
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Member Group: Members Posts: 163 Joined: 16-March 05 From: Oakville, Ontario, Canada Member No.: 201 |
looks like they were successful..see spaceflightnow.com article
edit:lets hope jaxa has an official update soon!! |
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Oct 4 2007, 08:40 PM
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#80
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Junior Member Group: Members Posts: 70 Joined: 12-November 06 Member No.: 1354 |
At the beginning, JAXA says that Kaguya is mainly as an experimental spacecraft to prove new technologies.. Thus, I presume that this is one of the low-profile public relations' reasons since this kind of mission has high risk of success. Hope, that all new technologies would run fine after many past setback lessons. I am not sure that Kaguya can be characterized as an "experimental spacecraft to prove new technologies", except as all spacecraft are experimental. At 2 tons and half a billion dollars, carrying 15 cutting edge planetary exploration instruments, this craft is the equal of any flown to any planet. JAXA has stated that it is "the most sophisticated lunar exploration mission in the post-Apollo Era." and "the largest lunar mission since the Apollo program". This mission could be the crown jewel of Japan's planetary exploration efforts for some time to come. |
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Oct 5 2007, 01:42 AM
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#81
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Member Group: Members Posts: 279 Joined: 19-August 07 Member No.: 3299 |
I am not sure that Kaguya can be characterized as an "experimental spacecraft to prove new technologies", except as all spacecraft are experimental. What I was saying comes from the extract: Kaguya's mission profile QUOTE The key technologies, such as the lunar orbit insertion and attitude / orbit control of the Orbiter are verified for future lunar exploration. More details about Kaguya: Kaguya (Selene) Home Web Institute of Space and Astronautical Science (Kaguya) I agree that the Kaguya is an impressive 3 ton spacecraft along with 15 scientific instruments. |
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Oct 5 2007, 11:19 AM
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#82
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Member Group: Members Posts: 163 Joined: 16-March 05 From: Oakville, Ontario, Canada Member No.: 201 |
press release is up.
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Oct 5 2007, 05:46 PM
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#83
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Junior Member Group: Members Posts: 52 Joined: 24-November 05 From: Tokyo Member No.: 571 |
I am pleased to share the success of LOI with you all
At the beginning, JAXA says that Kaguya is mainly as an experimental spacecraft to prove new technologies.. Kaguya is a scientific mission rather than technological one, but of course it includes lots of experimental elements for new technologies. FYI, Japan once had an experimental lunar probe, Hiten (MUSES-A), launched in 1990 to prove new technologies. The mission included LOI, successive swing-by navigation, aero-breaking by earth atmosphere, daughter satellite deployment, orbit determination using optical navigation, observation of space dusts around Lagrange points, and so on. I think Kaguya's LOI was supported by techniques acquired in Hiten mission. http://en.wikipedia.org/wiki/Hiten http://www.isas.ac.jp/j/isasnews/backnumbe...ISASnews154.pdf (mainly in Japanese, but including English articles and many figures) We've had two unfortunate experiences in deploying of daughter satellites, Hagoromo from Hiten and MINERVA from Hayabusa But I hope we'll get "the third time lucky" in upcoming deployment of VRAD and relay satellites |
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Oct 5 2007, 07:22 PM
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#84
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Junior Member Group: Members Posts: 70 Joined: 12-November 06 Member No.: 1354 |
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Guest_Zvezdichko_* |
Oct 6 2007, 03:58 PM
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#85
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Guests |
I wonder when the first images will be published
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Oct 7 2007, 01:32 AM
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#86
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Member Group: Members Posts: 279 Joined: 19-August 07 Member No.: 3299 |
A new update from Kaguya. It has already performed the 3rd LOI.
The First LOI: Injected orbit Apogee altitude 11,741 km Perigee altitude 101 km Period 16 hours 42 minutes The second LOI: Apogee altitude 5,694 km Perigee altitude 108 km Period 7 hours 53 minutes The third LOI: has already conducted. There are still three more. More details KAGUYA (SELENE) Lunar Orbit Adjustment Maneuver (LOIx) Just a curiosity, how does the spacecraft able to lower the Apogee? Trying to understand it, it is done by firing the rocket when the spacecraft is reaching the apogee so that the next loop will go slower and thus reducing its next apogee altitude and continues until reaching the desired altitude? |
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Oct 7 2007, 02:10 AM
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#87
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Member Group: Members Posts: 163 Joined: 16-March 05 From: Oakville, Ontario, Canada Member No.: 201 |
Just a curiosity, how does the spacecraft able to lower the Apogee? Trying to understand it, it is done by firing the rocket when the spacecraft is reaching the apogee so that the next loop will go slower and thus reducing its next apogee altitude and continues until reaching the desired altitude? Simple Really, The simplest way to raise or lower the perigee or apogee is to do a rocket firing at opposite position you want to change. ie. to lower apogee you decrease speed at perigee. or to raise apogee you increase speed when at perigee. etc... so the burn doesn't change the current position..it affects the opposite side of the orbit. Efficiency issues using fuel resources sometimes has multiple perigee burns to increase the apogee to the required size..which is why I believe the probe did several orbits around the Earth. (I may be wrongabout why multiple burns though ) cheers jb |
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Oct 9 2007, 02:07 AM
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#88
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Solar System Cartographer Group: Members Posts: 10226 Joined: 5-April 05 From: Canada Member No.: 227 |
The Relay satellite "Rstar" will be released tomorrow.
Phil -------------------- ... because the Solar System ain't gonna map itself.
Also to be found posting similar content on https://mastodon.social/@PhilStooke Maps for download (free PDF: https://upload.wikimedia.org/wikipedia/comm...Cartography.pdf NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain) |
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Oct 9 2007, 08:34 AM
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#89
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Junior Member Group: Members Posts: 52 Joined: 24-November 05 From: Tokyo Member No.: 571 |
Rstar was successfully separated.
http://www.jaxa.jp/press/2007/10/20071009_kaguya_e.html I wonder when the first images will be published I think data will be released after checkout of equipment. See translation of the press conference in LOI. http://jspace.misshie.jp/index.php?LbyD%2F20071005 |
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Oct 9 2007, 09:04 AM
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#90
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Member Group: Members Posts: 100 Joined: 11-October 04 From: Oxford, UK (Glasgow by birth) Member No.: 101 |
Nice update and a couple of spacecraft moonshots:
http://www.jaxa.jp/press/2007/10/20071009_kaguya_e.html#at01 http://www.jaxa.jp/press/2007/10/img/20071009_kaguya_05l.jpg http://www.jaxa.jp/press/2007/10/img/20071009_kaguya_07l.jpg Enjoy........ Brian -------------------- "There are 10 types of people in the world - those who understand binary code, and those who don't."
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