Comet C/2026 A1 did not survive its encounter with the Sun.

Comet C/2026 A1 has not returned to the field of view of space observations, having vanished yesterday around 2:30 PM Moscow time due to its proximity to the Sun. This means the celestial body no longer exists—it has been absorbed by the Sun, becoming part of it. The comet's volatiles are scattered in the extended solar corona, while larger rocky fragments could theoretically have fallen directly onto the solar surface. Part of the comet's dust tail was torn off at the moment of the catastrophe and forced by light pressure into the outer corona, where it will be completely dispersed (this process will be visible on LASCO in the next 24 hours). Although the likelihood of this scenario was initially considered dominant (the chances of surviving the encounter with the star were estimated at only a fraction of a percent), this outcome still evokes a feeling of slight sadness. Almost all comets in the solar system are comparable in age to this comet, having formed 5 billion years ago. A sad end to a multi-billion-year life.

C/2026 A1 became the first comet of 2026, earning it the prestigious designation A1. The comet's fate and the date of its demise were announced immediately in the first report and were accurate. The celestial body was identified as part of the so-called Kreutz family of comets—a rather intriguing collection of bodies, all believed to be fragments of an unknown giant comet that disintegrated centuries, and possibly millennia, ago. Some large fragments of this hypothetical body periodically approach the Sun. In particular, one of them is believed to have spawned the Great Comet of 1106, which, in turn, disintegrated, spawning the Great Comets of 1843 and, possibly, the Great Comet of 1882. The celestial body that died the day before is presumably one of the fragments of this centuries-long chain of disintegrations.

The impending demise of the comet gave rise, among other things, to expectations that its disintegration would cause a sharp increase in its brightness in the final days before its closest approach to the Sun. Some models even predicted a luminosity comparable to that of the full Moon and even the possibility of its being visible in the daytime sky. All these hopes were dashed. The comet initially proved smaller than expected, but then demonstrated extraordinary resilience. Instead of violently disintegrating on approach to the Sun, which would have produced a huge tail, it survived to the very end, breaking through the solar corona and the unbearable heat to become part of the star.

After the demise of C/2026 A1, the brightest comet in the sky became the previously second-place comet, C/2025 R3 (PANSTARRS). The new leader of the rankings, unfortunately, cannot boast either an equally interesting background or, frankly, outstanding brightness, but, for lack of a better option, it will likely become a prime target for astrophotography enthusiasts over the next month. The celestial body will reach its peak brightness around April 20-23, when its luminosity will rise to approximately third magnitude. This should be sufficient for some impressive images with professional and semi-professional instruments (especially in skilled hands), but the body is of no interest for visual observation. We'll have to wait for new guests.