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Nishimura Comet Passing Earth After 435 Years

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Nishimura Comet

C/2023 P1 (Nishimura) is a celestial visitor that has recently captured the fascination of astronomers and stargazers. Discovered by Japanese amateur astronomer Hideo Nishimura

on August 12, 2023, this comet has a unique story to tell. In this article, we will delve into the intriguing details of C/2023 P1 (Nishimura) and its remarkable journey through our solar system.

Nishimura Comet Cosmic Odyssey

C/2023 P1 (Nishimura) is not your everyday comet; scientists call it a “long-period comet.” This means it takes an incredibly long time to complete its journey around the Sun—specifically, about 434 years. Imagine this comet as a cosmic traveler, embarking on a once-in-a-lifetime adventure.

A Distant Path

Nishimura Comet orbit
Nishimura Comet orbit

The path of C/2023 P1 (Nishimura) is far from ordinary. Its eccentricity, a measure of how its orbit deviates from a perfect circle, is 0.996. This high eccentricity gives the comet a semi-major axis, which is the average distance from the Sun, of roughly 57 astronomical units (AU). To put this in perspective, it’s quite similar to the average distance of another distant object in our solar system, Eris, which resides at approximately 68 AU from the Sun.

The Discovery of a Cosmic Gem

Hideo Nishimura, an amateur astronomer with a passion for exploring the night sky, made an incredible discovery on that fateful day in August 2023. Armed with a 200-mm f/3 telephoto lens mounted on a Canon EOS 6D, he captured images of the comet when it was 1.0 astronomical unit (AU) away from the Sun. What’s even more remarkable is that he spotted the comet in images he had taken the night before. This discovery opened a new chapter in the study of comets.

Extending the Observation

The story of C/2023 P1 (Nishimura) doesn’t stop there. Pre-discovery images taken on January 19, 24, and 25, 2023, by the Pan-STARRS telescope were identified by Robert Weryk. These images extended the observation arc of the comet to an impressive seven months. In these images, the comet appeared as a stellar object with an apparent magnitude of approximately 22.

A Dawn Sky Wanderer

When C/2023 P1 (Nishimura Comet) was initially discovered, it graced the dawn sky, gradually drawing closer to the Sun. Starting from April 2023, it maintained a position of less than 50 degrees from the Sun. During this time, its apparent magnitude, a measure of its brightness as seen from Earth, was estimated to be around 10–11.

A Rapid Brightening Act

As if putting on a celestial show, the comet brightened at an astonishing pace. By August 27, 2023, its apparent magnitude had soared to 7.3. Its coma, the hazy cloud of gas and dust surrounding the comet’s nucleus, had expanded to a diameter of 5 arcminutes. Additionally, photographs revealed the presence of a slender ion tail, measuring 1.5–2 degrees in length.

A Celestial Spectacle

If you’re an aspiring skywatcher, there’s good news. C/2023 P1 (Nishimura) might become bright enough to spot with binoculars in the early days of September, just before sunrise.

A Close Encounter

On September 12, 2023, the Nishimura Comet will come within 0.84 AU (approximately 126 million kilometers or 78 million miles) from Earth. However, there’s a catch—it will still be just 15 degrees away from the Sun’s intense glare.

Journey to Perihelion

Five days later, on September 17, 2023, C/2023 P1 (Nishimura Comet) will reach perihelion, its closest point to the Sun, at a distance of 0.22 AU. During mid-September, the comet will briefly grace the evening sky, appearing about 5 degrees above the horizon just 30 minutes after sunset, for observers at 35 degrees north latitude.

The Naked Eye Potential (Nishimura Comet)

While the comet may reach an apparent magnitude of around +2, making it theoretically visible to the naked eye, it may still be challenging to spot against the brilliance of the Sun.

A Cosmic Connection Of Nishimura Comet

Interestingly, C/2023 P1 (Nishimura) may be linked to the Sigma Hydrids meteor shower, which is active from November 22 to January 18, peaking around November 30.

Discoveries Beyond C/2023 P1 (Nishimura Comet)

Hideo Nishimura, the dedicated amateur astronomer behind this remarkable discovery, has also contributed to our understanding of the cosmos through other findings. These include C/1994 N1 (Nakamura-Nishimura-Machholz), C/2021 O1 (Nishimura), and the Nova V6596 Sagittari.

Where is Comet Nishimura now?

Comet C/2023 P1 (Nishimura) is currently in the constellation of Leo. The current Right Ascension is 09h 59m 10s and the Declination is +23° 48′ 46”.

How Can I see Nishimura Comet?

The current observed magnitude, or brightness, of the comet, is around 5.0, which means people using telescopes in a dark sky can spot it. You may even be able to spot it in binoculars.

What is the rarest comet to see?

An extremely rare comet, which last visited us when humanity still lived in caves, is going to pay us a visit. The Comet C/2022 E3 (ZTF) takes around 50,000 years to orbit the Sun and this might be the last opportunity for anyone to take a look at this comet as astronomers believe it may never come back again

What is the most beautiful comet ever seen?

Comet Donati was described by many as the most beautiful comet ever see

Why do comets glow green?

Scientists have long suspected the green glow around some comets comes from the breakdown of a reactive molecule called dicarbon (C2)

What is a comet made of?

Comets are frozen leftovers from the formation of the solar system composed of dust, rock, and ice. They range from a few miles to tens of miles wide, but as they orbit closer to the Sun, they heat up and spew gases and dust into a glowing head that can be larger than a planet

How long do comets live?

Comets have a natural life span of 5 to 14 years and may live even longer in optimal conditions

How long do comets fly?

Astronomers classify comets based on the duration of their orbits around the sun. Short-period comets need roughly 200 years or less to complete one orbit, long-period comets take more than 200 years, and single-apparition comets are not bound to the sun, on orbits that take them out of the solar system.

In conclusion

C/2023 P1 (Nishimura) is a celestial wonder that has made an indelible mark in the realm of astronomy. Its journey through our solar system continues to intrigue and inspire skywatchers and scientists alike. As it graces our skies, it reminds us of the boundless mysteries that the cosmos holds and the dedication of those who tirelessly explore it.


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