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Even at its minimum estimated diameter, C/2014 UN 271 is the largest Oort cloud comet discovered, being more than 50 times larger than a typical comet which is less than 2 km (1.2 mi) in diameter. The previous largest known long-period comet was C/2002 VQ 94 (LINEAR) with a diameter of 96 km (60 mi), [ 35 ] followed by Comet Hale–Bopp at 74 ...
As space objects go, comets and meteors are not very big. While a planet like Earth is about 8,000 miles in diameter and a star like our Sun is about 865,000 miles across, the largest asteroid ...
The space agency said it’s the biggest comet nucleus ever recorded with an estimated diameter of 80 miles and overall bigger than the state of Rhode Island.
It is estimated to be between 60 and 230 miles wide, which could make it the largest comet ever discovered, EarthSky said. To put the size in context, Halley's Comet is about 3.5 miles wide, Long ...
The comet was discovered in the constellation of Equuleus by Father Nicolas Sarabat, a professor of mathematics, at Nîmes in the early morning of August 1, 1729. [7] At the time of discovery the comet was making its closest approach to Earth at a distance of 3.1 AU (460 million km; 290 million mi) and had a solar elongation of 155 degrees.
The comet has a retrograde orbit, lying at an inclination of 139°. Τhe comet had its perihelion on 27 September 2024, at a distance of 0.391 AU. Τhe closest approach to Earth was on 12 October 2024, at a distance of 0.47 AU. The comet does not approach close to the giant planets of the Solar System. [10]
Fortunately, it won't come within a billion miles of Earth. Named Comet Bernardinelli-Bernstein, it was perhaps the largest comet ever detected, likely some 10 times larger than the 6-mile-wide ...
C/2024 G3 (ATLAS) is a non-periodic comet, which reached perihelion on 13 January 2025, at a distance of 0.09 AU (13 million km) from the Sun. It is potentially the brightest comet of 2025, [6] with an apparent magnitude reaching −3.8 on the day of its perihelion. [5] The comet is visible in the southern hemisphere before and after perihelion.