The Stain - Page 16

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dx


Posts: 1661

Reply: 301



PostPosted: July 7, 2011 9:55 AM 

...still an amazing event.

Its off and on again appearance indicates growth and adherence to Oppy's skin! But WHY in that particular spot. Its attracted to something we can't see.

yt
dx

Barsoomer


Posts: 344

Reply: 302



PostPosted: July 7, 2011 3:58 PM 

Maybe we could agree on some observations that might provide useful clues.

1. It always seems to start with that tapering shape.

2. The circular sundial base is skewed (raised at the side) in a way that points generally towards the stain.

I'm wondering if ice forming at that corner under the sundial platform could explain both observations. It could push up the circular base and might periodically vaporize in a way that blows moist air towards the stain area.

hortonheardawho


Posts: 3465

Reply: 303



PostPosted: July 8, 2011 11:13 PM 

sol 2635-2648 ( Jun 23 - Jul 6, 2011 ) animation of stain changes:

The stain has started to cover a corner of a solar cell again.

dx


Posts: 1661

Reply: 304



PostPosted: July 9, 2011 8:33 AM 

OK boys, I think I may have it.

Having studying the horton pic in 303 the 'facing us' metal base plate of the sundial looks like its bonded to the deck [probably all round] with red dust except for the 1/2"? split opening at the plates' left corner. This split continues to the far side of the plate on the left face, but not behind it.

This is where the black magnetic dust/powder filaments/particles are hiding and at every drive Oppy stirs up a little bit of this magnetic dust ['like' particles attract don't they-of course they do] and I would bet, as Ben said some time ago [something about a tractor wheel], that this magnetic dust gets disturbed from Rover movement and forms its patterns based from the bumpy drives.

The dust particulate adheres or clings at this spot merely because Oppy's deck has less Mars red dust build-up so it can't get away off the deck, it retrieves back into the joint of the plate and Oppy's deck until a large amount is re-collected and ready to expose itself again. This magnetic dust will be here until a major wind storm erupts to blow it all away, OR perhaps increase more black magnetic dust from the blowing wind only to land here on Oppy's deck and increase its size and thus its strange 'amoeba' like movement.

yt
dx
Shocked

Ben


Posts: 5

Reply: 305



PostPosted: July 9, 2011 11:20 AM 

dx; I will second that opinion!!!

Barsoomer


Posts: 344

Reply: 306



PostPosted: July 9, 2011 2:56 PM 

dx, dark magnetic dust does sound good for the basic material of the stain, but the disappearance and re-emergence in more or less the same shape, 3 times now, is still puzzling.

Maybe the first occurrence of the stain was the only one that involved movement of dark material. The subsequent fading and re-emergence episodes may be due to covering and uncovering of the first, permanent, stain by the light-toned dust. In that sense, the idea that the subsequent stains involve cleaning may have some merit.

dx


Posts: 1661

Reply: 307



PostPosted: July 9, 2011 4:33 PM 

Ben>>>

You are my most admired geological-physicist contributor on this site. I hold your words of thought in admiration, and I thank you for your alliance in 305 with respect to this Martian anomaly on Oppy's deck. Thank you very much. I've got goose bumps, now.

OK Barsoomer>>> here it is. The black magnetic particles can not cross that horizontal line just above its main shape because there is too much Martian red dust covering Oppy.s deck in that spot. [less magnetic grip] So you see a long horizontal build-up of the black magnetic particulate-yes, every time it reappears. The black particulate has more than likely caused a wide 'groove' in the hardened red dust on the deck because of its continuous appearance, making the black particulate take that shape within the 'V' groove establishing a same or similar location of the spreading black magnetic dust. The finer black dust pigments are spread lightly over the red dust, and you can see its transparency closest to us when viewing the black dust from this angle.

Thank you horton for the pic!

The clue for me was, at least in my mind was the left corner with the 1/2"? split from Oppy's deck. There is a mild even spread of black particulate surrounding that split. Now look at the right corner of that base plate. There is no particulate or 'stain' material at all. In fact along the right side of the base plate there is no dark material.

So I figured that the black magnetic dust needed a place to gather and collect itself together for us to see 'expansion' and movement of that magnetic dust. It collects under the plate that has mm openings to uncovered red Martian dust so magnetic adherence is greater.[trust that Oppy's deck is NOT aluminum] This is perhaps why it is capable of gathering more of itself and then spreading as we see it when Oppy moves over the rough terrain.

That's my best boys...take it from there. My bubble memory is about to burst-but I do wish I could do this for a living!!!!OHHH a think tank!!! Yeah that's what I need.

Of course I could be dead wrong!

yt
dx

dx


Posts: 1661

Reply: 308



PostPosted: July 9, 2011 4:47 PM 

...Ohh, I forgot to mention that Oppy is traveling backwards, and if you look at its pictures you will see that every wheel roll it does a 'hiccup' dance to the side and then continues along its way until another complete wheel roll.

I believe the spread of the magnetic dust is caused by this 'hiccup' side jerking motion of Oppy for we do not know if this side jerk is a smooth one or a real jerking motion , then a straightening of the wheels to continue again

...more food for thought.

yt
dx

dx


Posts: 1661

Reply: 309



PostPosted: July 10, 2011 9:50 AM 

Oppy track image Nav Cam Sol 2630

yt
dx

Ben


Posts: 5

Reply: 310



PostPosted: July 10, 2011 12:59 PM 

Thanks dx, I tend to rely on "common sense" gained by many years of widespread observations. Wink

Barsoomer


Posts: 344

Reply: 311



PostPosted: July 10, 2011 1:11 PM 

[link]

Those "hiccups" are caused by the use of a backwards driving auto-navigation technique that was only started last year. The stain was in existence prior to the introduction of this technique.

Barsoomer


Posts: 344

Reply: 312



PostPosted: July 14, 2011 11:18 PM 

Sol 2652

http://qt.exploratorium.edu/mars/opportunity/pancam/2011-07-14/1P363609069ESFBG\
00P2129R2M1.JPG

Sol 2653

http://qt.exploratorium.edu/mars/opportunity/pancam/2011-07-14/1P363701841ESFBG\
QQP2111R3M1.JPG

Barsoomer


Posts: 344

Reply: 313



PostPosted: July 14, 2011 11:20 PM 

Hawkins


Posts: xxx

Reply: 314



PostPosted: July 20, 2011 3:52 PM 

it's just Martian Mold hitchin' a ride on Opportunity Razz

perhaps it's warm in that spot (by Martian standards)

can ya imagine the strange creatures living in the underground caverns
that have liquid water in them (likely under the spots Methane is escaping from) Very Happy

SpaceX and private investors can make a base on Mars by 2020!!

4 Falcon Heavys would cost less than 500 million!!!

3 habitats with food supplies, extra spacesuits, greenhouses etc sent first...

then 4th launch with 2 to 4 people! Surprised

SpaceX will make it affordable for one Billionaire Space Buff to finance the whole mission Shocked

Barsoomer


Posts: 344

Reply: 315



PostPosted: July 20, 2011 11:47 PM 

What is going on with the stain? What are those "thingies" at the corner of the solar panel?

Hawkins


Posts: xxx

Reply: 316



PostPosted: July 21, 2011 3:56 AM 

Razz it's a Martian Cockroach!!

Barsoomer


Posts: 344

Reply: 317



PostPosted: July 22, 2011 8:51 PM 

Two stereo images of stain taken on same Sol from two different angles. Gives an impression of the thickness of the stain.

Barsoomer


Posts: 344

Reply: 318



PostPosted: July 22, 2011 10:00 PM 

Synthesized sideways stereo view of the stain using the two angles from last post.

Constructed manually by trial and error using rotation and sizing operations. Not sure how valid it is. I'm sure Horton could do a better job.

Barsoomer


Posts: 344

Reply: 319



PostPosted: July 22, 2011 10:21 PM 

Another rendering; may be more natural.

hortonheardawho


Posts: 3465

Reply: 320



PostPosted: August 9, 2011 1:56 PM 

sol 2644-2667 ( Jul 2-26, 2011 ) animation of changes near the sundial:

Also note that the berries have gotten much larger near Endeavour.

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