IKAROS, JAXA spacecraft to Jupiter & the Jovian Trojan asteroids.

3488 · Sep 24, 2008

IKAROS, JAXA spacecraft to Jupiter & the Jovian Trojan asteroids.Andrew Brown.  <div class="Discussion_UserSignature"> "I suddenly noticed an anomaly to the left of Io, just off the rim of that world. It was extremely large with respect to the overall size of Io and crescent shaped. It seemed unbelievable that something that big had not been visible before". Linda Morabito on discovering that the Jupiter moon Io was volcanically active. Friday 9th March 1979.http://www.launchphotography.com/ http://anthmartian.googlepages.com/thisislandearthhttp://web.me.com/meridianijournal </div>

baulten · Sep 24, 2008

Is this really going to be the first solar sail utilization in a real mission?  That's amazing!! Here's to hoping everything goes well!

JonClarke · Sep 24, 2008

QUOTE]IKAROS, JAXA spacecraft to Jupiter & the Jovian Trojan asteroids.Andrew Brown.  Posted by 3488[/QUOTE]A solar sail no less!  Interesting targets too! The Trogans may be more like the small moons of Jupiter thaan normal asteroids, or they could be asteroids  or even comets with formerly eccentric orbits that have been captured.Jon <div class="Discussion_UserSignature"> Whether we become a multi-planet species with unlimited horizons, or are forever confined to Earth will be decided in the twenty-first century amid the vast plains, rugged canyons and lofty mountains of Mars Arthur Clarke </div>

CalliArcale · Sep 26, 2008

That sounds utterly cool!  Sounds like it's just a proposal at this point, but it's a very cool one.  I hope it flies. <div class="Discussion_UserSignature"> "People assume that time is a strict progression of cause to effect, but actually from a non-linear, non-subjective viewpoint it's more like a big ball of wibbly wobbly . . . timey wimey . . . stuff." -- The Tenth Doctor, "Blink" </div>

h2ouniverse · Sep 26, 2008

Heard about it. Clearly a technology pusher.Would be the japanese contribution to EJSM (Europa Jupiter System Mission) with:1) NASA doing the Europa Orbiter JEO (with several Io fly-bys before insertion into Europa's orbit)2) ESA doing the Ganymede orbiter JGO (with several Callisto fly-bys before insertion into Ganymede's orbit)3) JAXA doing the Jovian magnetospheric orbiter (with fly-bys of Trojans on the way to Jupiter).plus potentially a Russian Lander. best regards.

3488 · Sep 27, 2008

Replying to: <DIV CLASS='Discussion_PostQuote'>Heard about it. Clearly a technology pusher.Would be the japanese contribution to EJSM (Europa Jupiter System Mission) with:1) NASA doing the Europa Orbiter JEO (with several Io fly-bys before insertion into Europa's orbit)2) ESA doing the Ganymede orbiter JGO (with several Callisto fly-bys before insertion into Ganymede's orbit)3) JAXA doing the Jovian magnetospheric orbiter (with fly-bys of Trojans on the way to Jupiter).plus potentially a Russian Lander. best regards.  Posted by h2ouniverse</DIV>I like that very much.Several Io encounters prior to Europa Oribal Insertion (in fact that sounds very good to me, a return to Io would be of immense scientific value, but then I am a volcano head, so no bias there of course <img src="http://sitelife.space.com/ver1.0/Content/images/store/0/10/c0e4f363-874b-4dd3-8a89-47edf7da18ba.Medium.gif" alt="" />) .The ESA would concentrate on the outer two largest Galileans, with more passes of Callisto, prior to Ganymede Orbital Insertion will certainly shed more light as to why Callisto did not differentiate & but Ganymede did, not to mention the opportunity with these two craft alone getting to map the Galileans globaly in high resolution & also multispectrally. Perhaps also find out why Ganymede had a renewed flush of activity approx 1 GYA? Did something pass through the Jovian system causing Ganymede to temporarily take up a more elliptical orbit? JAXA are certainly more than capable of successfully carrying out what they are proposing. I really hope we get to see the giant Trojan Asteroid 624 Hektor, thought to be a dumbell shape, possibly two asteroids in physical contact??? Mind you a close pass of ANY Trojan would be of immense scientific value.I assume the Russians would be part of the ESA effort, so my guess is that the lander would be for Ganymede? If so, perhaps the cryovolcanic caldera in Sippur Sulcus as the landing site?????Also I hope also, that all craft will make at least one close Asteroid pass each whilst passing through the Asteroid Belt. Thanks Joel, great post, lets hope it flaming well happens.Andrew Brown.  <div class="Discussion_UserSignature"> "I suddenly noticed an anomaly to the left of Io, just off the rim of that world. It was extremely large with respect to the overall size of Io and crescent shaped. It seemed unbelievable that something that big had not been visible before". Linda Morabito on discovering that the Jupiter moon Io was volcanically active. Friday 9th March 1979.http://www.launchphotography.com/ http://anthmartian.googlepages.com/thisislandearthhttp://web.me.com/meridianijournal </div>

h2ouniverse · Sep 27, 2008

The Russian Lander would be for Europa, based on NASA's maps.Even before Georgia, NASA was not gleeful that the Russians might get the most visible part of the mission for the media, enabled by 2-3 billions of US taxpayers money (without NASA's orbiter the Russians would have no way to select their landing site).Now, it's even worse.Not sure this will happen. US/Russia and EU/Russia relations are at a very low point. I think NASA would not release the maps in the current context. The most probable scenario is NASA+ESA, with as an option NASA+ESA+JAXA.Best regards.

3488 · Sep 27, 2008

Replying to: <DIV CLASS='Discussion_PostQuote'>The Russian Lander would be for Europa, based on NASA's maps.Even before Georgia, NASA was not gleeful that the Russians might get the most visible part of the mission for the media, enabled by 2-3 billions of US taxpayers money (without NASA's orbiter the Russians would have no way to select their landing site).Now, it's even worse.Not sure this will happen. US/Russia and EU/Russia relations are at a very low point. I think NASA would not release the maps in the current context. The most probable scenario is NASA+ESA, with as an option NASA+ESA+JAXA.Best regards. Posted by h2ouniverse</DIV>Hi Joel,I have not even seen the NASA map for the mission. Where is it? I assume the landing site would be in Conamara Chaos? I assume this is related?Besides I agree, that the current situation in the Caucasus does not bode well, so the Europa Lander may be a moot point anyway. Andrew Brown.  <div class="Discussion_UserSignature"> "I suddenly noticed an anomaly to the left of Io, just off the rim of that world. It was extremely large with respect to the overall size of Io and crescent shaped. It seemed unbelievable that something that big had not been visible before". Linda Morabito on discovering that the Jupiter moon Io was volcanically active. Friday 9th March 1979.http://www.launchphotography.com/ http://anthmartian.googlepages.com/thisislandearthhttp://web.me.com/meridianijournal </div>

h2ouniverse · Sep 27, 2008

Replying to: <DIV CLASS='Discussion_PostQuote'>Hi Joel,I have not even seen the NASA map for the mission. Where is it? I assume the landing site would be in Conamara Chaos? I assume this is related?Besides I agree, that the current situation in the Caucasus does not bode well, so the Europa Lander may be a moot point anyway. Andrew Brown.  Posted by 3488</DIV> hi andrew,I meant the maps to be established by NASA's Europa Orbiter. After processing for spectro analysis of the ground from orbit. Not the ones currently published from Galileo. The sharing between NASA/ESA/JAXA as it is now officially envisaged is good news as it makes sense scientifically (covering all with little overlap) and technologically (the US are more advanced for radiations shielding and should concentrate on the hardest targets, and JAXA is specializing itself in magnetospheric studies). However the bad news are that the launch preiod is officially [2018-2022], with a nominal date in 2020, and a nominal arrival in... 2028!!!By this time the US-Russia relations will have changed many times.Regards.

3488 · Sep 28, 2008

Replying to: <DIV CLASS='Discussion_PostQuote'>hi andrew,I meant the maps to be established by NASA's Europa Orbiter. After processing for spectro analysis of the ground from orbit. Not the ones currently published from Galileo. The sharing between NASA/ESA/JAXA as it is now officially envisaged is good news as it makes sense scientifically (covering all with little overlap) and technologically (the US are more advanced for radiations shielding and should concentrate on the hardest targets, and JAXA is specializing itself in magnetospheric studies). However the bad news are that the launch preiod is officially [2018-2022], with a nominal date in 2020, and a nominal arrival in... 2028!!!By this time the US-Russia relations will have changed many times.Regards.  Posted by h2ouniverse</DIV>I agree, the time frame is disappointing, too long really as this could be done right NOW. I like the way the Galilean moons are being shared out like that & we get to have the Galileans properly mapped. I agree that NASA would be better suited currenty for Io & Europa as they have considerable experience with radiation shielding & operating spacecraft in high radiation environments, though ESA & JAXA are certainly more than capable, but maybe lack experience.Also this IMO MUST be combined with a return to the Saturn system & really looking forward to returning to both Uranus & Neptune with perhaps New Horizon type missions to Eris, Haumea & Sedna?? Landers / rovers on Mercury, 1 Ceres, 2 Pallas, 4 Vesta, more on Mars, The Galileans (all four) Titan, Encleadus, Dione, Iapetus, Ariel, Titania, Oberon, Triton, Pluto. I do not see why such a program should be expensive. Using shared heritage, though of course an Io lander would need to be radiation shielded whereas a Titan one would not have to, but all could use the same basic design shared by NASA, ESA & JAXA. Perhaps I'm just dreaming & spouting nonsense????Andrew Brown.  <div class="Discussion_UserSignature"> "I suddenly noticed an anomaly to the left of Io, just off the rim of that world. It was extremely large with respect to the overall size of Io and crescent shaped. It seemed unbelievable that something that big had not been visible before". Linda Morabito on discovering that the Jupiter moon Io was volcanically active. Friday 9th March 1979.http://www.launchphotography.com/ http://anthmartian.googlepages.com/thisislandearthhttp://web.me.com/meridianijournal </div>

silylene old · Sep 28, 2008

Replying to: <DIV CLASS='Discussion_PostQuote'>Perhaps I'm just dreaming & spouting nonsense????Andrew Brown.  Posted by 3488</DIV>Not at all.  I agree!   We will also need to upgrade our global space communications networks and relay satellites in order to handle the increases in data transmissions.  Not that I have any problem with that either. <div class="Discussion_UserSignature"> <div class="Discussion_UserSignature" align="center">- - - - - - - - - - - - - - - - - - - - - - </div><div class="Discussion_UserSignature" align="center">I really, really, really miss the "first unread post" function. </div> </div>

MeteorWayne · Sep 28, 2008

Replying to: <DIV CLASS='Discussion_PostQuote'>Not at all.  I agree!   We will also need to upgrade our global space communications networks and relay satellites in order to handle the increases in data transmissions.  Not that I have any problem with that either. Posted by silylene</DIV> Good point about upgrading our comm network. With so many spacecraft out there, managing the time available on the big dishes is a real challenge. Maybe a good subject for International Cooperation at a reasonable budgetary pricepoint. <div class="Discussion_UserSignature"> But the Krell forgot one thing John. Monsters. Monsters from the Id. I really, really, really, really miss the "first unread post" function </div>

3488 · Sep 28, 2008

</DIV>A solar sail no less!  Interesting targets too! The Trogans may be more like the small moons of Jupiter thaan normal asteroids, or they could be asteroids  or even comets with formerly eccentric orbits that have been captured.Jon Posted by jonclarke</DIV>I agree Jon. Also I hope we get to see some of the outer moons of Jupiter up close. There appear to be two distinct groups. The moons from Themisto (outside of Callisto's orbit), Leda, Himalia, Elara & Lysithea appear to be similar to type S asteroids, with Himalia being possibly a parent body. Carpo is the outermost prograde moon of Jupiter appears also to be an S type, though it is alone, well away from the Himalia grouping. Then we have the extensive Pasiphae grouping, type C & Ds, (including Pasiphae, Anake, Sinope, Carme (which may actually have its own grouping), Autonoe, Erinome etc,) orbiting Jupiter in a retrograde direction including Kore, the outermost known Jovian moon. It would be a fantastic opportunity if it is possible to see some of these up close, shame that the Voyagers, Galileo, Cassini or New Horizons could not do though Cassisni did get to see Himalia from a great distance & New Horizons likewise with Himalia & Elara. Perhaps the missions quoted to by Joel (H2Ouniverse) might.I will try & gem up & see if the Trojans are similar to the outer moons of Jupiter. In fact the Mars moons Phobos & Deimos appear to be very similar in spectra to the Pasiphae / Carme group moons, where as asteroids 951 Gaspra, 243 Ida & 433 Eros, appear to be spectrally similar to the Himalia group.  Replying to: <DIV CLASS='Discussion_PostQuote'>Not at all.  I agree!   We will also need to upgrade our global space communications networks and relay satellites in order to handle the increases in data transmissions.  Not that I have any problem with that either. Posted by silylene</DIV>I agree. This need not be expensive. If NASA, ESA & JAXA were to pool their resources & adopt the same heritage, we could explore the solar system with probably not much more money than is already being spent.We know this approach would work, look at how ESA assisted NASA very graciously in monitoring Phoenix during EDL & also relayed MER material successfully using Mars Express!!!!!! That alone is evidence enough that such an approach will work. Also the asteroid 2867 &Scaron;teins press conference was very telling.The Rosetta team used NASA images of 951 Gaspra, etc, but rather referring to them as these are NASA, these are ESA, all results were pooled together & referred to in the singular. That was very encouraging to see. There was no them & us about it, likewise with the recent Mars Express Phobos pass, also no them & us then either, whilst using NASA imagery to help explain what Mars Express imaged. Lets hope this continues.Andrew Brown.  <div class="Discussion_UserSignature"> "I suddenly noticed an anomaly to the left of Io, just off the rim of that world. It was extremely large with respect to the overall size of Io and crescent shaped. It seemed unbelievable that something that big had not been visible before". Linda Morabito on discovering that the Jupiter moon Io was volcanically active. Friday 9th March 1979.http://www.launchphotography.com/ http://anthmartian.googlepages.com/thisislandearthhttp://web.me.com/meridianijournal </div>

3488 · Nov 9, 2008

Hi Suzuka, Thank you for the update. I've copied your entire post over to the existing IKAROS thread & have closed the new one as to avoid having two parrallel threads on the same topic.Andrew Brown. ---------------------------------------------------------------------------------------------------------------------------------- The launch plan of demonstrator for a solar sail was reported by the Japanese news media. http://www.tokyo-np.co.jp/article/national/news/CK2008110902000118.html----------------------------------------------Translation Aiming at realization of the "solar sail" which receives the particles of solar light on a big sail, and is accelerated, Japan Exploration Agency (JAXA) determined the policy which starts preparation of the demonstrator which will cruise to a nearby planet by November 8. The plan to carry it instead of the weight which suppresses the vibration at the time of launching an H-IIA rocket in the near future was unveiled at the international society held in Britain. Assistant Professor Osamu MORI who is a demonstrator team representative says. "If it succeeds in the interplanetary cruise by a solar sail, it will be the first in the world. We put the meaning of the challenge and named it "Ikaros". Although propellant is not required for a solar sail and low cost is the strong point, the technique which folds and launches a big sail and is deployed in the space is a problem".Professor Junichiro Kawaguchi and others of JAXA launched the small rocket from Uchinoura, Kagoshima, and they succeeded in the experiment which deploys the sail of a thin resin film with a diameter of 10m in the universe for the first time in the world in August, 2004.Then, the ion engine was combined with the sail which stuck the solar cell in part, and the probe which cruises to Jupiter and the asteroid of further long distance was planned. This time, they targeted Venus etc. as the first step, and they decided to prove that it can cruise only using a sail.In a plan, the sail of Ikaros is a square whose one side is about 14m. And aluminum is vapor-deposited on the polyimide resin film only 0.0075mm thick. It is folded into X type like wrinkles, and is twisted around the main body (about 1.6m in diameter, about 1m in length, and 350kg in weight) of the cylinder type arranged at the center.Main body carries out a high velocity revolution temporarily after a launch, and a sail is deployed by centrifugal force, and it continues rotating slowly, and the form of a sail is maintained. Deployment of a sail will be checked with six miniature cameras. It is said that it can accelerate or slow down by changing the angle to the sun of a sail. <img src="http://sitelife.space.com/ver1.0/Content/images/store/10/2/fa0f7187-ed2c-4f3a-8217-669b69c305f6.Medium.jpg" alt="" />----------------------------------------------It is not described when the launch is. On the other hand, the procurement contract of the name of "the solar sail loading adapter development test corresponding to PLANET-C missions" was already exhibited on September 8.I do not know whether these are the same projects.However, if these are the same, Ikaros will be launched in 2010.Will Ikaros be launched earlier than Cosmos2 and the NASA solar sail?  Ikaros web page:http://www.jspec.jaxa.jp/e/activity/ikaros.htmlJAXA's Solar sail mission:http://www.senkyo.co.jp/ists2008/pdf/2008-d-57.pdf    -----------------------------------------------I HOPE that a space budget grows more. <img id="13d0b3c4-c5bc-4a2d-ad5c-33562f04976a" src="http://sitelife.space.com/ver1.0/Content/images/store/3/13/13d0b3c4-c5bc-4a2d-ad5c-33562f04976a.Large.gif" alt="blog post photo" />  <div class="Discussion_UserSignature"> "I suddenly noticed an anomaly to the left of Io, just off the rim of that world. It was extremely large with respect to the overall size of Io and crescent shaped. It seemed unbelievable that something that big had not been visible before". Linda Morabito on discovering that the Jupiter moon Io was volcanically active. Friday 9th March 1979.http://www.launchphotography.com/ http://anthmartian.googlepages.com/thisislandearthhttp://web.me.com/meridianijournal </div>

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