A New Way to Pinpoint Phobos's Path Around Mars

By Space.Fan Editorial DeskSeptember 20, 2026 at 11:02 AM UTC

Researchers have created a smart computer program that uses old photos to track the exact location of Mars's moon, Phobos.

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The Drop

Scientists have found a better way to map the movement of Phobos, one of the two s orbiting Mars. Usually, tracking a small requires experts to look at thousands of pictures and manually mark points on the surface, which is slow and tiring work. The new method uses a computer program that can automatically identify parts of the in photos taken by the Mars Express spacecraft. To do this, the computer builds a 3D digital model of Phobos. It then compares this model to actual photos taken by the spacecraft's high-resolution camera. By matching the shapes in the photos to the 3D model, the software can pinpoint exactly where the is located in space at any given time. Using this new automated system, the researchers analyzed images from 2007 all the way to 2025. They were able to get over 1,100 successful measurements of the 's position. This new pipeline is much faster and keeps the measurements consistent compared to the old, manual way of doing things.

Why It Matters

Knowing exactly where a is located is vital for space missions. If a spacecraft travels near a , scientists need precise data to make sure the probe stays on the right path and avoids any accidents. This new method makes that data more accurate and easier to get. Beyond just safety, this project proves that we can update our knowledge about space using photos that were taken many years ago. It turns old archives into a treasure chest of fresh data, saving us from having to wait for brand-new space missions to learn more about how s move.

The Catch

While this computer program works well for Phobos, it relies on having a very good 3D model of the object beforehand. If the shape of the or is not perfectly understood, the computer might struggle to match the images correctly. Also, while the system is fast, it still needs to be checked to ensure the software didn't make a mistake during the image-matching process.

Put That in Perspective

This work is a big step up from older methods that relied on human eyes. By using modern computer vision tools, researchers can look at large collections of data very quickly. They likely hope to apply this same computer program to other moons and asteroids in our solar system to help map their paths as well.

Source September 20, 2026

Wangxin Lai, Qingfeng Zhang, Rui Zhang, Kai Tang, Chunyu Ding, Zhan Li, Haipeng Wang

Jinan University, Shanghai Astronomical Observatory, Shenzhen University, Northwestern Polytechnical University·The Astronomical Journal·10.3847/1538-3881/ae99da

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