Comet 3I/ATLAS displays luminous structures directed towards the Sun in solar alignment images

A detailed analysis of images taken by Telescópio Espacial Hubble revealed structured and directional activity in the interstellar comet 3I/ATLAS during a rare solar alignment in January 2026. The object, the third confirmed object of origin outside Sistema Solar, exhibited bright patterns with marked elongation toward Sol, while the nucleus remained unresolved.

The observations occurred on dates close to the opposition alignment, when the comet was positioned almost directly opposite Sol in relation to Terra. Essa geometric configuration allowed improved visibility of phenomena activated by solar radiation.

The activity includes symmetrical jets and an asymmetrical coma, features that raise questions about the internal composition and mechanisms of material release.

• 3I/ATLAS was discovered in July 2025 by the ATLAS system on Chile.
• Its hyperbolic orbit confirms interstellar origin.
• Perihelion occurred in October 2025, 1.36 AU from Sol.

Observations carried out in January

Images captured on January 14, 2026 show an extensive halo with pronounced elongation towards Sol. Advanced Processamentos reveal jets separated by angles of approximately 120 degrees, present in multiple exposures.

These patterns differ from traditional cometary tails, which generally extend away from the Sol. The configuration indicates possible rotation of the object with a period estimated at around 7.1 hours after perihelion.

Chemical composition detected

Spectroscopy identified high levels of carbon dioxide, as well as water vapor and carbon monoxide in smaller quantities. The sublimation of these volatiles explains part of the observed activity, but the geometry of the jets suggests an asymmetric distribution of mass.

Additional observations of Telescópio Espacial James Webb detected traces of carbonyl sulfide. The object also presents non-gravitational acceleration, typical of active comets in different orbital phases.

Interstellar trajectory and origin

3I/ATLAS follows a hyperbolic orbit with an eccentricity greater than 6, confirming that it is not gravitationally bound to Sol. Sua relative velocity of about 60 km/s suggests origin in the thick disk of Via Láctea, with a potential age greater than 7 billion years.

The minimum approach to Terra occurred in December 2025, at approximately 1.8 AU, without any risk of collision. Após the January alignment, the comet continues to move away from the inner Sistema Solar.

Structured standards in debate

Astronomers recorded collimated and anti-tail jets at various phases of the orbit. Parte researchers attribute the patterns to rotation effects combined with asymmetric sublimation, similar to Sistema Solar comets.

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Other experts highlight the persistence of symmetric structures as an element that requires additional investigation. Observatórios ground and space personnel maintain monitoring while the object remains accessible.

Features of the observed coma

The 3I/ATLAS coma has a teardrop shape in post-perihelion images, extending over millions of kilometers. Jatos doubles or triples appear in specific processing, with oscillation aligned to the rotational period.

• Anti-tail directional to Sol measures ten times the apparent diameter.
• Weak greenish tone indicates specific gaseous emissions.
• Current magnitude around 16.7 requires professional equipment for observation.

Rare Alignment Conditions

The January 22 alignment positioned the comet 3.33 AU from Sol and 2.35 AU from Terra, with a minimum phase angle of 0.69 degrees. Essa geometry favored the detection of opposition surges in the ejected dust, an uncommon phenomenon in interstellar objects.

Previous observations, in November and December 2025, already indicated sunward elongations. The January alignment significantly expanded the clarity of structured details.

Technical details of the captures

Hubble exposures use specific filters to enhance contrasts in the coma and jets. Técnicas as well as the Larson-Sekanina filter remove radial symmetry and highlight linear structures.

Combined images from multiple dates show temporal evolution of the patterns, with variations consistent with rotation. The resolution reaches structures of a few thousand kilometers.

Ongoing monitoring

The comet remains observable until mid-2026, albeit with progressively decreasing brightness. Telescópios and Gemini North recorded a greenish hue associated with gaseous compounds.

Coordinated research between space agencies continues to analyze variations in activity. The data contributes to understanding the formation and distribution of volatiles in primitive bodies from interstellar space.