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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 ...
The comet was moving southwards and was recovered on 3 November. On 4 November T. Morgan from Sydney Observatory estimated its magnitude to be 4. [8] On 6 November David Seargent spotted the comet with the naked eye, estimating an apparent magnitude of 4.8. By 12 November the comet the comet had faded to a magnitude of 7.2. [9]
The comet was first photographed by astronomer Lin Chi-Sheng (林啟生) with a 0.41-metre (16 in) telescope at the Lulin Observatory in Nantou, Taiwan on July 11, 2007. . However, it was the 19-year-old Ye Quanzhi (葉泉志) from Sun Yat-sen University in China, who identified the new object from three of the photographs taken by Lin
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A green comet is due to make its first Earth approach in 50,000 years, and will be visible for those in the Northern Hemisphere, on 31 January and every night this week if skies are clear. Green ...
The comet was discovered last month by an amateur Japanese astronomer and makes its closest approach to Earth on Tuesday. A green comet will fly above us this week. But don’t blink — it won ...
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.
Vesta (radius 262.7 ± 0.1 km), the second-largest asteroid, appears to have a differentiated interior and therefore likely was once a dwarf planet, but it is no longer very round today. [74] Pallas (radius 255.5 ± 2 km ), the third-largest asteroid, appears never to have completed differentiation and likewise has an irregular shape.