New Years Postcards from the Edge by Opportunity Mars Rover


A robot from Earth is celebrating New Years on Mars by snapping another amazing set of “Postcards from the Edge” while perched near the sharp edge of a crater cliff on the red planet. NASA’s Opportunity rover is now stationed just meters away from a new precipice at the stunningly beautiful crater named Santa Maria. The twin rovers mark their 7th anniversary on Mars this week. See martian postcard mosaics above and below.

Craters expose the hidden history of Mars and permit scientists a path to explore the past geologic epochs which otherwise would remain buried and inaccessible.

Santa Maria Crater from Orbit. Opportunity arrived at the western rim of Santa Maria Crater, some 90 meters wide, on Dec. 16, 2010 at a spot called “Palos”. Opportunity then drove in a counterclockwise direction to a spot called “Wanahani” at the southern edge. It is collecting high resolution imagery and spectral data over New Years and will then resume driving to its next destination at the Southeast rim, an area nicknamed “Yuma”. See new annotations. Researchers are using data collected by the CRISM mineral mapping spectrometer aboard NASA’s Mars Reconnaissance Orbiter (MRO) to direct the route which Opportunity is traversing on Mars during the long term journey to Endeavour crater. Spectral observations recorded by CRISM indicates the presence of water-bearing sulfate minerals at the location shown by the red dot on the southeast rim crater whereas the crater floor at the blue dot does not. This image was taken by the High Resolution Imaging Science Experiment (HiRISE) camera also on MRO. Credit: NASA/JPL-Caltech/Univ. of Arizona.

Santa Maria is an exciting find because it appears to be relatively new and unweathered – on the order of possibly just a few million years old. Researchers are eager to drive around the rim in order to explore deposits of water bearing minerals that contain valuable clues to the flow of liquid water on ancient Mars.

The golf cart sized rover arrived this week (Dec. 29) at an outlook nicknamed “Wanahani” near the southern edge of Santa Maria. Opportunity arrived at the western rim of Santa Maria on Dec. 16. Just before Christmas, she drove about 20 meters south along the steep rim from the initial location at Palos Promontory and then bumped incrementally further up to the edge (Sol 2464) .

Palos Promontory and Santa Maria Panorama from Opportunity on Mars.
Opportunity drove within 2.5 meters of the rim and snapped this beautiful panoramic vista of the crater and distant horizon on Sol 2454. Note rover solar panel deck, antennae and sundial at left. Mosaic Credit: NASA/JPL/Cornell, Oliver de Goursac.
Santa Maria from Palos Promontory on Mars.
Opportunity drove to within 2.5 meters of the rim and snapped this gorgeous panoramic vista unveiling the whole interior on Sols 2453 & 2454. Note the steep walls and sand dunes on the floor. Mosaic Credit: NASA/JPL/Cornell, James Canvin
Wanahani outlook at Santa Maria Crater.
Opportunity took this panaromic mosaic from “Wanhani” just meters from the crater rim on Dec 29 (Sol 2464). Note rover tracks near rim at left, solar panel at right and numerous ejecta rocks. CRISM mapper results suggest water bearing materials are located at the southeastern section of the crater. Portions of distant Endeavour Crater are faintly visible as bumps on the horizon in the background. Mosaic Credit: NASA/JPL/Cornell, Ken Kremer, Marco Di Lorenzo
Crater Rim Duo with Signs of Hydates on Mars.
Santa Maria rim up close (80 meters away) and Endeavour rim (6 km away) on the horizon in the distance. Both craters show mineralogical evidence for the past flow of liquid water on Mars and are high priority science targets. Mosaic Credit: NASA/JPL/Cornell, Ken Kremer, Marco Di Lorenzo
Partial panorama near Wanahani outlook on Sol 2461.
Undulating sand dunes on the crater floor and southern portion of Santa Maria, inclined about five degrees. Mosaic Credit:

But there is no time to party and relax. The rover will soon resume driving to the next location – nicknamed “Yuma”. It will continue farther around the football field sized crater – measuring some 90 meters (295 ft) in diameter – to reach the exposures of sulfated hydrates located at the southeast portion of the crater near “Yuma”.

Opportunity must be in position at an important science target before mid January and the onset of solar conjunction and a temporary communications black out with Earth. The rover will remain stationary during conjunction.

Fish eye view from Wanahani outlook. Opportunity snapped this wide angle view from the crater rim of Santa Maria with the hazard camera on Sol 2464. Credit: NASA/JPL/Cornell

At Wanahani, Opportunity is now hurriedly toiling away over the New Year’s period to collect a pair of long baseline, high resolution stereo image mosaics using it’s panoramic, multispectral imaging camera. See our initial Wanahani mosaics assembled here from the navigation camera images just received on Earth (Sol 2464).

The team is using all 13 filters on the filter wheels of the panoramic camera, according to Ray Arvidson, the deputy principal investigator for the rovers, in an interview from Washington University in St. Louis. Over the course of several days, the left and right “eyes” of the panoramic camera will gather data at various wavelengths to maximize the collection of spectral information about the hydrated minerals located in the craters interior.

Data downlink is limited by the available amount of flash memory aboard Opportunity and is the Achilles heel of rover operations. Virtually all the pictures and science is streaming back to Earth via NASA’s long lived Mars Odyssey orbiter. The team is working to get all the acquired science data offloaded as swiftly as possible,

A functioning replica of the Santa Maria in Funchal harbor, Madeira Islands, Portugal.

Arvidson said that the team hopes that the meteor impact that excavated the crater also blasted some of these scientifically fascinating rocks free to spots which are more easily accessible – just outside the rim for close up analysis. Additional imaging and spectral data is also being collected from Mars orbit this new year’s weekend in hopes of quickly directing the rover to the best locations for science in the limited time available.

Opportunity will study the relatively fresh and uneroded ejecta rocks using all the instruments located at the end of the robotic arm. One target will be selected for a longer duration study during the period of solar conjunction, said Arvidson.

The Santa Maria replica at sea. Opportunity is on an epic expedition to a distant horizon far beyond the shores of Earth.
The rover team is naming places visited around the crater rim after islands visited by Columbus during his voyages of expedition and discovery to the New World starting in 1492. The Santa Maria was the largest of the three ships used during his first voyage.

Opportunity will resume her long term trek to Endeavour crater after the end of solar conjunction in mid February. The western rim of Endeavour is about 6 km distant. Endeavour is a very compelling science target because it shows significant signatures for clay minerals which formed in the presence of neutral bodies of liquid water on Mars, billions of years ago.

Spirit and Opportunity celebrate 7 Years on Mars this month since the dynamic duo landed in January 2004. Look for my story soon.

8 Replies to “New Years Postcards from the Edge by Opportunity Mars Rover”

    1. Thanks James !!!
      Tho, my idea of Martian Lifeforms is dashed by the way the ‘sand dunes’ blend into the left side crater walls in a most natural way ! Blast ! there goes another ‘great idea’ ! lol

      But what ‘forces’ cause these ‘dunes’ to shape ?
      The ‘air’ is way too thin to impart ‘material shifting’ of the dunes, isn’t it ?

  1. Thanks for the links in the above comments ! It really shows the scale of the crater’s size well.

    And for a funny thought: In this article’s 6th and 7th photos, the crater rim detail shot and the ‘inexplicable’ dunes on the crater’s floor; what if the ‘sand dune structure’ on the crater floor is the form that ‘Life’ takes on Mars !
    Notice how in photo #6 the ‘sand dune’ is so abruptly different from the ‘crater’. It almost looks photoshopped in ! Like it’s not really part of the landscape, like it’s a ‘lifeform’ laying in wait at the bottom of the crater for something to come along so it can ‘grow’ ! haha, as its way of “directing a stream of negative entropy upon itself” -the definition of Life.
    And the way, on the left side of the various photos, how it goes up the side walls of the crater, almost to the objection of the laws of natural physics ! for what we’d expect the next to impossibly thin Martian atmoshpere could ever produce, especially if this crater is only a few million years old, as speculated. How could the Martian atmosphere ever create such sand dune shapes up the side walls like this ???

    1. “directing a stream of negative entropy upon itself” -the definition of Life.

      There are several definitions of life, but that isn’t one of them. Modulo that “negative entropy” is a funky definition, modulo that one can describe a cell having a partial flow of entropy out by way of looking at entropy differences – that would make a refrigerator “life”.

      The least constraining definition of life follows from defining its process, evolution. Evolution is a process that results in heritable changes in a population spread over many generations. Any population that is participate in such a process can be said to be life. (Though you may at any time want to cut away software, hardware and, for some, viruses, from the usual “wetware” by specific restrictions.)

  2. First of all, well done to everyone involved and to the ‘bots themselves for keeping this mission going for as long as they have. Long may it continue.

    I noticed in the bottom left of the picture a rock with an un-typical straight edge. It looks like a brick. How would a rock like that form given normal erosion on Mars? If I saw that on Earth I’d assume it was a man made house brick. Obviously, that can’t be the case here. Just curious – and no, I don’t think little green men left a brick next to a crater.

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