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cerin
2005-Aug-12, 06:47 PM
Take a look at this Spirit Navcam image from sol 570

http://marsrovers.jpl.nasa.gov/gallery/all/2/n/570/2N176964791ESFADAEP1560L0M1-BR.JPG (http://marsrovers.jpl.nasa.gov/gallery/all/2/n/570/2N176964791ESFADAEP1560L0M1.JPG)

There appears to be something strange above the hills in the distance. The extended nature of the object seems to rule it out as an imaging artefact (not to mention the apparent plume above/behind it!)

Could this be something that spirit has caught that is airborne closer to the rover? Or something in the distance?

GDwarf
2005-Aug-12, 07:09 PM
My firewall seems to dislike images displayed on forums, could you please post a direct link so I can get a good look at it?

John Kierein
2005-Aug-12, 07:13 PM
I looked at the Navigation camera pictures posted here and didn't find it. Is it from another site?
http://marsrovers.jpl.nasa.gov/gallery/all/spirit.html

CJSF
2005-Aug-12, 07:20 PM
Take a look at this Spirit Navcam image from sol 570

...

There appears to be something strange above the hills in the distance. The extended nature of the object seems to rule it out as an imaging artefact (not to mention the apparent plume above/behind it!)

Could this be something that spirit has caught that is airborne closer to the rover? Or something in the distance?

How can you tell it's above the hills? How can you tell there's a plume behind it? Did you mean something that looked like a plume? (and yes, there is a difference) It's so small (in terms of numbers of pixels in that image), it could be anything, including an imaging or processing artifact. It could even be contamination on the camera.

CJSF

John Kierein
2005-Aug-12, 07:21 PM
This image from sol 571 on the Navcam looks like there's a dust devil in about the same location.
http://marsrovers.jpl.nasa.gov/gallery/all/2/n/571/2N177056696ESFADAEP1560L0M1.JPG
http://tinyurl.com/c5h3d

CJSF
2005-Aug-12, 07:25 PM
I looked at the Navigation camera pictures posted here and didn't find it. Is it from another site?
http://marsrovers.jpl.nasa.gov/gallery/all/spirit.html

No, it's there. I found it. 5th row down, first column on sol 570. If it is something "real", I wonder what it could be? Seems oddly shaped and contrasted for a dust devil.

CJSF

cerin
2005-Aug-12, 07:33 PM
Christopher, if you read my post more closely, you'll notice that I use words like "apparent", "seems" and "appears" to imply that although what's in that picture may look like real, it isn't necessarily!

I also suggest that if it's real, it may be close to the rover as opposed to far away over the hills............

01101001
2005-Aug-12, 07:40 PM
5th row down, first column on sol 570. If it is something "real", I wonder what it could be? Seems oddly shaped and contrasted for a dust devil.

Image (http://origin.mars5.jpl.nasa.gov/gallery/all/2/n/570/2N176964791ESFADAEP1560L0M1.HTML)

That looks like a cosmic ray hit to the CCD during the zero-exposure image (that is taken just before the actual image and subtracted from the image, to eliminate bias and persistent noise). Such resulting black streaks are far from rare.

John Kierein
2005-Aug-12, 07:41 PM
I found it. Here's the link.
http://tinyurl.com/7pwrn

Could well be an artifact, but hard to tell.

John Kierein
2005-Aug-12, 07:54 PM
Maybe it's lightning caused by the dust devil:
http://www.spacedaily.com/news/mars-base-05f.html

publiusr
2005-Aug-12, 08:22 PM
Sometimes a funnel can be segmented--but that is a condensation effect--this would be from dust. Too grainy to tell.

Superluminal
2005-Aug-13, 01:20 AM
What I'm curious about, is that Bonneville Crater on the left? Can we pinpoint the lander?

ToSeek
2005-Aug-13, 02:19 AM
What I'm curious about, is that Bonneville Crater on the left? Can we pinpoint the lander?

I think Spirit is currently pointed to the south, not west back where it landed.

RBG
2005-Aug-13, 05:34 AM
I'm pretty sure we are seeing one of those sentinel monoliths as described by Arthur C. Clarke. Not.

imho, that one photo makes it difficult if not impossible to determine what it might be given the dozens of innocent reasons that could produce the same effect.

RBG

frogesque
2005-Aug-13, 09:16 AM
Is this a sunrise picture? the 'plume' looks to be part of a series of concentric shadings from a point just below the horizon. Imageing will produce those halo effects. The 'object' aparently floating above the skyline could be anything.

Edit: looked at this in Photoshop, the 'object' is 2 or 3 pixels wide by 8 or 9 high and definitely not centred on the halo. I would very much doubt that Mars' atmosphere is dense enough to produce a mirage so at the moment it's a bit of a mystery.

Perhaps it's a rod :wink:

Argos
2005-Aug-13, 02:07 PM
If you magnify the image to at least 400%, youŽll see that the image is made-up of several vertical stripes. The artifact is precisely at at the edge of one of the stripes, and features a clear-cut limit. Does look like an image artifact.

genebujold
2005-Aug-17, 08:27 PM
I've analyzed the hi-res version, and the artifact is 13 pixels high by 1 pixel wide. The core image appears to be just 4 pixels high by 1 pixel wide. Very slight shading is evident to pixels to the artifact's immedate right. The core, at the bottom, appears to be causing the variance above it.

The lighting and focus are not consistant with anything that would be over the hills. However, they are consistant with something that's anywhere from on the lens to a point a perhaps 25 meters in the distance.

It's either a single speck of dust on the lens or it's a plumed Tahitian war-headdress, floating midair with no visible means of support.

Given the fact that everything is out of focus, the rocks are in half-focus, and the artifact is in full focus, I would guess that it's the JPL guys decided to go to min focus to see what's on the lens cover!

01101001
2005-Aug-18, 02:52 AM
It's either a single speck of dust on the lens or it's a plumed Tahitian war-headdress, floating midair with no visible means of support.
How did you eliminate a cosmic ray hit to the CCD?

Stars and Cosmic Rays Observed from Mars (bottom of page) (http://marsrovers.jpl.nasa.gov/gallery/press/spirit/20040311a.html)

Gemini
2005-Aug-19, 03:16 AM
I saw somewhere that this one guy thought there was a monolith on Phoboshttp://www.vgl.org/webfiles/mars/phobos/phobos.htm Beware, there is woo here.
I'm pretty sure we are seeing one of those sentinel monoliths as described by Arthur C. Clarke. Not.

snabald
2005-Aug-19, 06:21 PM
Maybe it's a meteorite.

snabald
2005-Aug-19, 06:28 PM
I saw somewhere that this one guy thought there was a monolith on Phoboshttp://www.vgl.org/webfiles/mars/phobos/phobos.htm Beware, there is woo here.
I'm pretty sure we are seeing one of those sentinel monoliths as described by Arthur C. Clarke. Not.


It is odd that something is casting a shadow that long. Could be a big shard of rock ejected from a crater or something?

publiusr
2005-Aug-19, 07:53 PM
Perhaps a shadow track of one of its moons? Mirage? no--not enough atmo.

Those dust devils on other pages do seem very earthlike. I would have thought they were wider--more diffuse.

cerin
2005-Aug-23, 06:42 PM
Deja vu !?!!

http://marsrovers.jpl.nasa.gov/gallery/all/2/n/580/2N177860041ESFADIHP1560L0M1-BR.JPG (http://marsrovers.jpl.nasa.gov/gallery/all/2/n/580/2N177860041ESFADIHP1560L0M1.JPG)

Weird having the same sort of artefact, in apparently the same geographical location, but with a different orientation, and not visible in the pictures taken around that one. If it's on the lens, then it must have shifted, but why then is it not apparent in other pics!?

(Sol 580, navcam, 1st column, 8th row sub-frame EDR)