when, how and where to watch it

He comet C/2023 A3 Tzuchinshan/Atlascalled “comet of the century”which already offered the first observation opportunity in September, returns to present its latest appearance visible in the Canary Islands during October. Astronomy enthusiasts will be able to enjoy this astronomical phenomenon with the naked eye, through binoculars, or even take photographs of the comet at dusk.

On October 12, the comet will reach its closest point to Earthlocated approximately 70 million kilometers away. This approach will allow you to see it more clearly until it gradually begins to move away and decrease in brightness. The best dates to observe this with the naked eye will be from 13 to 16 Octoberaround 20:45, observation time limited to approximately 20 minutes per day and extended until 22:00 on the 16th.

However, several factors make it difficult to observe. According to the Institute of Astrophysics of the Canary Islands (IAC), the light of twilight and the brightness of the Moon in its waxing phase make it difficult to see the comet. Starting October 19th, nights will become more favorable as natural light pollution caused by the Moon will decrease, improving conditions until October 21st.

An atmospheric phenomenon known as “atmospheric extinction” will also affect its brightness, reducing the clarity of the comet near the horizon due to light scattering, experts say. However, the use of binoculars and cameras will make viewing easier and provide the opportunity to capture spectacular images, especially from October 19 when moonlight interference will be reduced.

For telescope photographers, October 15 offers a unique opportunity as a comet will pass by the globular cluster M5, promising a visually striking combination of celestial bodies.

During the observation period, other planets such as Venus, Saturn and Jupiter will accompany the comet in the night sky, creating an astronomical spectacle of enormous magnitude. Conditions for viewing the comet will worsen after October 25, when its brightness begins to fade completely.