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What's Up With Hayabusa? (fka Muses-c) |
 Sep 11 2005, 08:22 AM
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#151
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 Member  Group: Members Posts: 648 Joined: 9-May 05 From: Subotica Member No.: 384  |
No impact craters???
-------------------- The scientist does not study nature because it is useful; he studies it because he delights in it, and he delights in it because it is beautiful.
Jules H. Poincare My "Astrophotos" gallery on flickr... |
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Sep 11 2005, 08:26 AM
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#152
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 Member Group: Members Posts: 813 Joined: 8-February 04 From: Arabia Terra Member No.: 12 |
QUOTE (Toma B @ Sep 11 2005, 08:22 AM) No impact craters???  It's tiny. Compare it with pictures of dusty and bouldery parts of (433) Eros at the same scale and the surface texture starts to make sense. |
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Sep 11 2005, 09:07 AM
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#153
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 Member Group: Members Posts: 362 Joined: 12-June 05 From: Kiama, Australia Member No.: 409 |
Looks to me like a few lumps just held together by gravity and fine dust filling the spaces between. If anything were to hit it the whole pile would just fall apart and gently settle back together again. There would be no crater I think
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| Guest_Myran_* |
Sep 11 2005, 09:16 AM
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#154
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Guests |
QUOTE Toma B said: No impact craters??? I think there might be some craters, have indicated some on this image but theres some hestitation on my part on the identification, so lets see when we get closer. 
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Sep 11 2005, 12:10 PM
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#155
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 Interplanetary Dumpster Diver Group: Admin Posts: 4405 Joined: 17-February 04 From: Powell, TN Member No.: 33 |
I agree that we must consider the possibility that other than the small craters relative to the size of the asteroid, this little asteroid is so fragile that an impact simply breaks a chunk off. Something about this little world feels Deimos-like.
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Sep 11 2005, 05:15 PM
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#156
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 Member Group: Members Posts: 809 Joined: 11-March 04 Member No.: 56 |
What are the dimensions of 25143 Itokawa?
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Sep 11 2005, 06:13 PM
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#157
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Senior Member Group: Members Posts: 1636 Joined: 9-May 05 From: Lima, Peru Member No.: 385 |
QUOTE (David @ Sep 11 2005, 12:15 PM) What are the dimensions of 25143 Itokawa? The asteroide Itokawa is potato-shaped asteroid, is named after Hideo Itokawa, a Japanese rocket pioneer. it measures 630 meters long. Up to here I have not found more information such as its width. Rodolfo P.D.For comparisions purpose, I don't know about the sizes of the comet Tempel 1. |
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Sep 11 2005, 06:15 PM
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#158
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Founder Group: Chairman Posts: 14445 Joined: 8-February 04 Member No.: 1 |
800m is the onyl number I've seen batted around.
Is that an average diameter, a length...I dont know. Doug |
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Sep 11 2005, 07:10 PM
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#159
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Member Group: Members Posts: 249 Joined: 11-June 05 From: Finland (62°14′N 25°44′E) Member No.: 408 |
QUOTE (RNeuhaus @ Sep 11 2005, 09:13 PM) P.D.For comparisions purpose, I don't know about the sizes of the comet Tempel 1. 7.6 km x 4.9 km x 4.9 km For example Eros is 33 km x 13 km x 13 km So Tempel 1 is roughly 10 and Eros 40 times larger. -------------------- The universe is not only stranger than we imagine, it is stranger than we can imagine.
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Sep 11 2005, 07:22 PM
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#160
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Interplanetary Dumpster Diver Group: Admin Posts: 4405 Joined: 17-February 04 From: Powell, TN Member No.: 33 |
QUOTE (Jyril @ Sep 11 2005, 07:10 PM) 7.6 km x 4.9 km x 4.9 km For example Eros is 33 km x 13 km x 13 km So Tempel 1 is roughly 10 and Eros 40 times larger. For Itokawa, according to the NSSDC, 0.3 x 0.7 km. This is a radar derived figure, and based on imagery so far, I think that the model is holding up quite nicely. -------------------- |
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Sep 11 2005, 09:57 PM
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#161
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Senior Member Group: Members Posts: 1636 Joined: 9-May 05 From: Lima, Peru Member No.: 385 |
A funny news:
Hayabusa will also employ a hopping small robot called Minerva, about coffee size, which can move around on the asteroid’s surface."  During the first descent to fire a pellet into the surface, a small coffee-can-sized surface hopper, called MINERVA, will be dropped slowly onto the asteroid's surface. For one to two days it will slowly leap about the asteroid taking surface temperature measurements and high-resolution images with each of its three miniature cameras.The other funny thing is that Hayabusa will also release is a small tenis ball: Target Marker to the surface.  "In order to successfully descend on a candidate-landing point, it not only uses an artificial target called Target Marker that is released from the spacecraft to the surface, but also adjusts its position by processing the images sent from the camera and keeping an eye on landmarks."That is intrigating stuff and it is very funny at the same time. How do a such thin device: Minerva is considered as the world smallest spacecraft?  Measure the temperature, take pictures and send images to the Mother spacecraft.One more point, according to the Ion Engine Cruise route map (click here for more information) is that the spacecraft Hayabusa will make a loop around Itokawa during its breaking process.  I tought that Hayabusa will go directly to Itokawa and stop at a gate position at 20 km above of the asteroide's surface. But , now I am not sure what will be the future route of Hayabusa before returning home (Earth) by December. Rodolfo |
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Sep 12 2005, 05:44 AM
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#162
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Member Group: Members Posts: 813 Joined: 8-February 04 From: Arabia Terra Member No.: 12 |
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Sep 12 2005, 06:04 AM
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#163
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 Senior Member Group: Members Posts: 2492 Joined: 15-January 05 From: center Italy Member No.: 150 |
If I remeber correctly, the Target Marker include also signatures from worldwide people (like Cassini DVD)... Now I regret to not partecipate to this initiative!
-------------------- I always think before posting! - Marco -
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Sep 12 2005, 06:42 AM
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#164
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Member Group: Members Posts: 648 Joined: 9-May 05 From: Subotica Member No.: 384 |
 Color composite image will be available soon.That is a promise they should keep...  It's allways nice to see new member of the Solar Sistem even so small... -------------------- The scientist does not study nature because it is useful; he studies it because he delights in it, and he delights in it because it is beautiful.
Jules H. Poincare My "Astrophotos" gallery on flickr... |
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Sep 12 2005, 06:43 AM
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#165
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 Member Group: Members Posts: 370 Joined: 12-September 05 From: France Member No.: 495 |
QUOTE (RNeuhaus @ Sep 11 2005, 11:57 PM) A funny news: Hayabusa will also employ a hopping small robot called Minerva, about coffee size, which can move around on the asteroid’s surface." During the first descent to fire a pellet into the surface, a small coffee-can-sized surface hopper, called MINERVA, will be dropped slowly onto the asteroid's surface. For one to two days it will slowly leap about the asteroid taking surface temperature measurements and high-resolution images with each of its three miniature cameras.Rodolfo Here is a description of Minerva science capabilities. Rakhir
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