Comet Tempel 2, the size of the one that wiped out the dinosaurs, is heading toward Earth this summer

Whenever an object from space approaches our planet, many people wonder what might happen. That is the case with Comet Tempel 2, which measures about 6.2 miles (10 kilometers) across, making it roughly the same size as the asteroid associated with the extinction of the dinosaurs. Fortunately, there is no cause for concern. Although the comet will make a relatively close pass by Earth and will soon be easier to observe, it poses absolutely no threat to our planet.

When will comet Tempel 2 be visible?

If you have clear skies, grab a pair of binoculars or a small telescope because you’ll soon have the chance to see this 6.2-mile-wide comet, first discovered 153 years ago, as it passes relatively close to Earth. The comet will make its closest approach to our planet on August 3, giving skywatchers another exciting opportunity this summer to observe a visitor that humanity first recorded in the 19th century.

A frequent visitor that is not always easy to observe

The story of Tempel 2 began on July 4, 1873, when German astronomer and renowned comet hunter Wilhelm Tempel spotted a faint object moving southeast through the constellation Pisces. Tempel observed the comet again the following night and continued tracking it over the next several months until it disappeared from view on October 20 of that year.

Astronomers determined that it was a short-period comet, initially estimating that it completed one orbit around the Sun every five to five and a half years. On July 19, 1878, Tempel observed the comet’s return, confirming a more refined orbital period of 5.16 years.

Today, astronomers know those early estimates were slightly off. Comet Tempel 2 actually completes one orbit around the Sun every 5.37 years. Its relatively short orbital period makes it an ideal target for repeated observations, allowing scientists to study how comets change and evolve over time.

The best time to see Tempel 2

Even though Tempel 2 visits the inner solar system regularly, it is not always well positioned for observation. Some returns offer poor viewing conditions, but this year the comet will begin appearing in the constellation Capricornus during July, making it accessible to anyone with binoculars or a small telescope.

The best views are expected as the comet approaches its closest point to the Sun in late July and early August, with August 2 and 3 offering the best opportunity to observe it as it makes its closest approach to Earth.

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