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MASCOT landing on Ryugu, 3 October 2018
Steve G
post Oct 6 2018, 01:15 AM
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I was wondering about the same thing. Either the image sensor isn't aligned to the lens due to temperature shift or related stress, or, it's deliberately like that so when the spacecraft is on the surface, and righted, both the foreground and background will be in focus like a tilt shift camera where you change the angle of the negative to increase depth of field.
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neo56
post Oct 6 2018, 07:49 AM
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I aligned each 3 frames of the MASCOT animation in relation to Ryugu surface:

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Explorer1
post Oct 6 2018, 03:27 PM
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No new pictures, but some science results in this article: https://spaceflightnow.com/2018/10/05/masco...s-expectations/

QUOTE
What we’ve learned so far from the pictures is it looks like the surface is more consolidated rocks overlaid by a thin layer of particulate material,” Grott said.
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Stefan
post Oct 11 2018, 07:01 PM
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QUOTE (Steve G @ Oct 6 2018, 02:15 AM) *
I was wondering about the same thing. Either the image sensor isn't aligned to the lens due to temperature shift or related stress, or, it's deliberately like that so when the spacecraft is on the surface, and righted, both the foreground and background will be in focus like a tilt shift camera where you change the angle of the negative to increase depth of field.

It is deliberately like that. It's called the Scheimpflug principle.

There's a press conference tomorrow with some new material.
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yoichi
post Oct 12 2018, 12:15 PM
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https://www.dlr.de/dlr/presse/en/desktopdef...#/gallery/32338
Numerous boulders, many rocks, no dust: MASCOT's zigzag course across the asteroid Ryugu
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Explorer1
post Oct 13 2018, 03:35 PM
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Finally surface images! Nice oblique view of the giant south pole boulder too! The top seems to be the only big smooth part of Ryugu....

And we have a name for the landing site: 'Alice's Wonderland'
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stevesliva
post Oct 15 2018, 02:59 PM
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QUOTE (yoichi @ Oct 12 2018, 08:15 AM) *
https://www.dlr.de/dlr/presse/en/desktopdef...#/gallery/32338
Numerous boulders, many rocks, no dust: MASCOT's zigzag course across the asteroid Ryugu


For those like me wondering about the "no dust" in the title, it's described only as "fine material" in the accompanying text.

No dust? Makes you wonder if the dust gets cemented.
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Phil Stooke
post Oct 15 2018, 07:21 PM
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It's easy to make dust through micrometeorite impacts, and some at least should be retained. But cementing or consolidating it is much more difficult. More likely it's a sifting effect, where jostling by impacts causes large chunks to rise and small objects to fall into spaces between them. On Itokawa the same thing was seen except that in some low-lying areas the fine materal became concentrated in smooth patches. We don't see that here, maybe because Ryugu is more equidimensional.


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Hungry4info
post Jan 30 2019, 11:10 PM
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This abstract at the 50th LPSC has a new image from MASCOT, taken during local night with the red LED on. The red ellipse is labelled as the radiometer field of view. Is it possible to remove it from the image to try to restore the background image?
https://www.hou.usra.edu/meetings/lpsc2019/pdf/1267.pdf
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elakdawalla
post Jan 31 2019, 01:13 AM
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Needs a little cosmetic work around the edges of the ellipse, but here's a quick and dirty version:
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MahFL
post Jan 31 2019, 03:54 AM
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QUOTE (elakdawalla @ Jan 31 2019, 02:13 AM) *
Needs a little cosmetic work around the edges of the ellipse, but here's a quick and dirty version:


Anyone know what the scale is we are looking at ?
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Baywa
post Jan 31 2019, 03:17 PM
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QUOTE (MahFL @ Jan 31 2019, 04:54 AM) *
Anyone know what the scale is we are looking at ?
In the article it says " MARA observed a rock formation of approximately 60 cm diameter, which is shown in Fig. 1." Fig.1. being the attached picture. But I'm not quite sure: 60cm may also refer to the red ellipse.
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Gladstoner
post Jan 31 2019, 11:54 PM
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QUOTE (elakdawalla @ Jan 30 2019, 07:13 PM) *
Needs a little cosmetic work around the edges of the ellipse, but here's a quick and dirty version:


Cleaned up, with a bit of necessary artistic license:

Attached Image

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centsworth_II
post Feb 1 2019, 07:21 AM
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QUOTE (MahFL @ Jan 30 2019, 11:54 PM) *
Anyone know what the scale is we are looking at ?
Attached Image


If my math is right and the pixels on the image are accurate to the original, I get the 10 cm bar (in black) based on 500 pixels at 0.2mm per pixel at the bottom of the image as mentioned in the image caption.

I get the 60cm bar (in yellow) based on 300 pixels at 2mm per pixel (rough estimation, based on 0.2mm per pixel at the bottom of the image and 3mm per pixel near the horizon as mentioned in the image caption).

Disclaimer: I am not an accomplished image interpreter.
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Hungry4info
post Jul 15 2019, 09:27 PM
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"MASCOT confirms what scientists have long suspected
Small fragments of carbon-rich asteroids are too fragile to survive entry into Earth’s atmosphere"

Press release:
https://www.dlr.de/dlr/presse/en/desktopdef...x9fOby8qyxi5AWo

Original paper:
Low thermal conductivity boulder with high porosity identified on C-type asteroid (162173) Ryugu
https://www.nature.com/articles/s41550-019-...rPquGwVWtmiCPak


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