Opportunity Rover Captures Her First Dust Devil on Mars

Article written: 29 Jul , 2010
Updated: 24 Dec , 2015
by

[/caption]

The Opportunity rover has captured an image of a dust devil, and surprisingly, this is the first one ever that Oppy has spied. Spirit has seen dozens of dust devils over on the other side of the planet in Gusev Crater, and even the Phoenix lander’s camera captured several of these whirling dust dervishes during its short four-and-a-half month life. Plus the different orbiting spacecraft have seen evidence of plenty of dust devils by using their eyes from the skies. But this is the first one Oppy’s cameras have managed to shoot. This tall column of swirling dust appeared in a routine image that Opportunity took with its panoramic camera on July 15, 2010. The rover took the image in the drive direction, east-southeastward, right after a drive of about 70 meters (230 feet), and was taken for use in planning the next drive.

But obviously, over the years, Opportunity has benefited from dust devils – or perhaps just gusts of wind – as she has had a series of unexpected boosts in electrical power when the pervasive Martian dust gets cleaned off her solar panels. And just one day before Opportunity captured this dust devil image, wind cleaned some of the dust off the rover’s solar array, increasing electricity output from the array by more than 10 percent. These unexpected – but welcome – Martian “car washes” have helped extend the life of both rovers.

“That might have just been a coincidence, but there could be a connection” between the cleaning event and the dust devil in the image, said Mark Lemmon of the rover team from Texas A&M University. The team is resuming systematic checks for afternoon dust devils with Opportunity’s navigation camera, for the first time in about three years.

Lemmon said that Spirit’s location inside Gusev Crater, is rougher in ground texture, and dustier, than the area where Opportunity is working in the Meridiani Planum region. Those factors at Gusev allow vortices of wind to form more readily and raise more dust, compared to conditions at Meridiani. Orbiters have photographed tracks left by dust devils near Opportunity, but the tracks are scarcer there than near Spirit. Swirling winds at Meridiani may be more common than visible signs of them, if the winds occur where there is no loose dust to disturb.

Source: JPL

, ,



5 Responses

  1. Member
    Aqua says

    Am wondering that if one of the more concentrated dust devils were to pass over either rover… might there be enough energy to tip em over?

  2. John says

    Any idea on how tall this “tall column” might actually be?

  3. Kevin says

    I love this stuff. To be honest I’m tired of the constant stream of nebulae (pretty, but we certainly get a lot of those pics), and asteroids (just another cratered rock). I’m not saying those pictures aren’t important, they ARE, but we get plenty of those.

    It’s nice to see (even *still* images of) the activity of another planet. It makes me feel more like we’re in a busy universe. To know that right now there are dust devils spinning on Mars, and that it’s raining somewhere on Titan makes me feel good.

  4. Jon Hanford says

    John,

    I don’t know about this specific dust devil, but Martian dust devils in general are about a kilometer wide and 10 kilometers high. According to this PR, they could pose a problem for robotic missions: http://www.unisci.com/stories/20012/0606012.htm

  5. Member
    Aqua says

    I really, really miss UNISCI… I used to go there every day. Then, Don Radler passed away and that site went with him. Sad…. [email protected]; (

Comments are closed.