Once in a Lifetime! The 'Zijinshan-ATLAS Comet' Displays a Spectacular Tail
The 'Zijinshan-ATLAS Comet' (C/2023 A3) is one of the brightest comets in recent years and one of the few visible to the naked eye. It passed its closest point to Earth on October 12, with brightness exceeding expectations, reaching magnitude 1. As time progresses, its altitude gradually increases while its brightness slowly diminishes. However, until October 20, its brightness is expected to remain above magnitude 4, and under light pollution-free conditions, it is not difficult to observe its bright tail using binoculars.
After passing its closest approach, the 'Zijinshan-ATLAS Comet' can still be briefly seen in the southwestern sky after sunset until October 20, which is considered the optimal viewing time. Many photography enthusiasts have captured images of the comet, with its tail spanning over 20 degrees, making for a spectacular sight!
The comet was initially reported in January 2023 by China's Zijinshan Observatory but quickly disappeared. It wasn't until February 22, 2023, when the Asteroid Terrestrial-impact Last Alert System (ATLAS) reported the appearance of a new comet. Upon comparison, it was confirmed to be the same object, leading to the comet's joint naming after both discoverers.
Astronomers note that the appearance of large comets is generally unpredictable and irregular. The 'Zijinshan-ATLAS Comet' has a period of tens of thousands of years, making this observation likely a once-in-a-lifetime opportunity. There will still be chances to observe the comet until the end of October, so astronomy enthusiasts should make the most of this time for viewing.
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