Parker probe records exclusive appearance of interstellar comet 3I/ATLAS near the Sun in 2025 By Luís Henrique Costa
4 min read
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NASA’s Parker Solar Probe probe obtained unprecedented records of the interstellar comet 3I/ATLAS between October 18 and November 5, 2025.
Strategically positioned after its 25th solar flyby, the Parker probe managed to capture approximately 10 daily photos of the comet. Essa series of images offers an unprecedented perspective on the trajectory and behavior of an object that originated outside the boundaries of our star system.
The Wide-Field Imager for Solar Probe (WISPR) instrument was fundamental to this achievement. Para To align the field of view and maximize the quality of observations, the probe needed to be rotated, allowing data to be collected while 3I/ATLAS orbited approximately 209 million kilometers from Sol, beyond the orbit of Marte.
Origin and detection of comet 3I/ATLAS
Comet 3I/ATLAS was first identified on July 1, 2025 using the ATLAS telescope, an initiative funded by NASA and located at Chile. Observações prior to its official discovery, extending until June of the same year, already indicated its presence.
These initial analyzes confirmed a hyperbolic trajectory, a distinctive feature of objects that are not gravitationally bound to our Sol and that therefore originate from other stellar systems.
3I/ATLAS represents the third confirmed interstellar object, following ‘Oumuamua, detected in 2017, and 2I/Borisov, in 2019. Sua external origin offers valuable clues about the physical and chemical conditions existing in other planetary systems.
Parker Solar Probe Imaging Technology
The WISPR instrument, aboard Parker Solar Probe, was designed primarily to capture images of the solar corona. However, its versatility allowed it to be adapted to record comet 3I/ATLAS effectively as it passed through the probe’s field of view.
During the observation period, Parker was moving away from Sol, positioned between 277 and 313 million kilometers from the comet. Essa ideal distance made it possible to obtain clear captures, something that would have been unfeasible from the Terra due to glare caused by sunlight.
Positional advantage of the probe in space
Parker Solar Probe’s unique orbit places it in strategic positions to perform observations close to Sol, offering a viewpoint that no terrestrial telescope can replicate. Durante the period in which the images were captured, comet 3I/ATLAS was aligned with the star from Earth’s perspective, making it completely hidden.
By moving away from Sol, the probe obtained unique observation angles, allowing mission controllers to rotate the spacecraft to optimize image quality. Essa maneuver resulted in the north positioning at the bottom of the compiled photos, according to the established pattern.
These data are crucial for understanding the comet’s interactions with the solar wind in regions close to Sol. Eles fill significant gaps in ground-based observations, especially during the comet’s perihelion.
Cosmic Visitor Details and Composition
Comet 3I/ATLAS has a dusty coma and an icy core, with an estimated diameter of between 440 meters and 5.6 kilometers, according to images obtained by the Hubble telescope. Sua chemical composition is notable for including high levels of carbon dioxide, which distinguishes it from many comets that originate within our solar system. The hyperbolic trajectory of the object, confirmed by observations, is a clear indication that it is just passing through our system, and is not gravitationally linked to the Sol. Felizmente, 3I/ATLAS does not pose any risk to Terra, having its minimum approach in December 2025, at a safe distance of 1.8 astronomical units.
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Image refinement and analysis
The raw photos captured by the Parker Solar Probe are still in the process of being adjusted to compensate for varying exposures and stray light inherent in observing conditions. Esse refinement is essential to ensure data accuracy.
Image processing aims to remove visual artifacts and clearly reveal changes in the brightness and structure of the comet’s coma and tail. The team responsible for the WISPR instrument continues to work diligently to release the final versions of the images, which, in their initial phase, provide a valuable time series of the behavior of 3I/ATLAS near perihelion.
Advances in understanding celestial objects
The observations carried out by Parker Solar Probe significantly expand scientific knowledge about interstellar visitors. Elas demonstrate in a practical way how objects that originate in other stellar systems interact with the dynamic environment of our Sol.
By combining this data with information from other NASA missions, such as Hubble and Europa Clipper, scientists can form a more complete picture of the 3I/ATLAS passage. Esse joint effort, which involves multiple spacecraft, highlights the agency’s ability to explore unexpected opportunities in space.
The results obtained reinforce studies on the formation of distant planetary systems, offering a solid basis for future detections and analyzes of similar objects. The ability to observe these celestial visitors up close is critical to improving models of stellar and planetary evolution.
This collaboration between different missions maximizes the scientific return, allowing a deeper analysis of the characteristics and behavior of interstellar comets.
Monitoring by other Nasa missions
Several NASA spacecraft recorded comet 3I/ATLAS at different phases of its trajectory. The Hubble space telescope, for example, estimated the size and shape of the comet’s coma between July and November 2025, providing crucial data for its characterization.
