Comet C/2025 R3 (PANSTARRS) surprised astronomers by developing a second tail during its approach to Sol. The phenomenon was recorded in the last 24 hours before the object left the range of space telescopes. Cientistas Russians are following the event and investigating the causes of the appearance of this additional structure. The celestial body should become visible from Terra in the coming days, offering the opportunity for direct observation.
Space Telescópio records extra tail on Sunday
Instituto of Pesquisa Espacial of Academia of Ciências of Rússia released images from the LASCO telescope capturing the formation of the additional tail. The characteristics became evident on Sunday, April 26, suddenly and unexpectedly. Normalmente, comets develop tails due to the continuous action of the solar wind, but this appeared in a few hours.
The main hypothesis points to the impact of plasma clouds released by Sol on April 23 and 24. The start of formation coincided with the estimated moment the comet was hit by an intense solar shock. The sudden increase in the density and temperature of the surrounding gas would have triggered a secondary ion tail. The common solar wind would not be enough to produce this effect in such a short time.
- The comet passed perihelion on April 19, approximately 0.499 AU from Sol.
- The second tail formed in the mid-afternoon of April 25, according to telescope records.
- Cientistas also consider other possibilities, such as geyser activity in the core or temporal coincidence.
- The structure may be temporary and disappear within days or weeks.
Origem and hyperbolic object trajectory
PANSTARRS is a hyperbolic comet originating from Nuvem of Oort, a distant region that marks the boundary of Sistema Solar. Sua last passed close to Sol occurred approximately 170 thousand years ago. Após this current approach, he must leave Sistema Solar permanently, never returning. The orbit does not allow for a predictable return on human timescales.
Astrônomos have been monitoring the object since its discovery in September 2025 by the Pan-STARRS survey on Havaí. Naquela epoch, the comet was 3.60 AU from Sol with apparent magnitude around 20. Brightness increased significantly as it approached perihelion. Recent Imagens show a characteristic greenish coma and an elongated main tail in the opposite direction to Sol.
Visibilidade expected from the Southern Hemisphere
Sunlight still prevents direct visualization of the comet these days, keeping it overshadowed by the brightness of Sol. Ele should become visible from the Southern Hemisphere in the first few days of May, shortly after sunset, near the western horizon. Terra’s closest approach occurred on April 26, about 72 million kilometers away.
Especialistas indicate that binoculars significantly help in observing the object. The comet may reach sufficient magnitude to be seen with the naked eye in dark sky conditions, away from urban light pollution. The presence of the second tail until the moment of visibility would reinforce the hypothesis of a solar plasma impact. Caso structure disappears sooner, the temporary tail explanation gains more credibility among researchers.
Análise technique of cometary phenomenon and behavior
The Russian Laboratório highlighted that the phenomenon occurred after two massive plasma ejections from Sol in sequence. The interaction with the comet locally altered the gas environment around it dramatically. Caudas ions respond extremely sensitively to variations in the solar wind and plasma shocks. Disconexões and complex structures have been observed in other historical comets during intense solar events.
PANSTARRS maintains activity typical of long-period comets originating from Nuvem and Oort. The continuous release of gases and dust from the nucleus forms the characteristic glowing coma and tails. The ion tail points in the opposite direction to Sol due to solar radiation pressure, while the dust tail follows the comet’s orbit. Imagens captured by additional observatories shows complex details in the main tail, with knots, curvatures and dynamic structures that evolve quickly.