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  2. C/2014 UN271 (Bernardinelli–Bernstein) - Wikipedia

    en.wikipedia.org/wiki/C/2014_UN271_(Bernardinelli...

    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 km ...

  3. Comet Hale–Bopp - Wikipedia

    en.wikipedia.org/wiki/Comet_Hale–Bopp

    Comet Hale–Bopp (formally designated C/1995 O1) is a long-period comet that was one of the most widely observed of the 20th century and one of the brightest seen for many decades. [11] [12] [13] Alan Hale and Thomas Bopp discovered Comet Hale–Bopp separately on July 23, 1995, before it became visible to the naked eye.

  4. Lists of comets - Wikipedia

    en.wikipedia.org/wiki/Lists_of_comets

    Coin showing Caesar's Comet as a star with eight rays, tail upward. Non-periodic comets are seen only once. They are usually on near-parabolic orbits that will not return to the vicinity of the Sun for thousands of years, if ever.

  5. NASA spots ‘record-breaking’ comet hurtling toward ... - AOL

    www.aol.com/nasa-spots-record-breaking-comet...

    The space agency said it’s the biggest comet nucleus ever recorded with an estimated diameter of 80 miles. ... Corresponding research from the ALMA telescope in Chile found that the comet was ...

  6. List of minor planets and comets visited by spacecraft

    en.wikipedia.org/wiki/List_of_minor_planets_and...

    Flyby; discovered Dactyl; first asteroid with a moon visited by a spacecraft, largest asteroid visited by spacecraft at the time. 253 Mathilde: 66 × 48 × 46 (58 km) 1885 NEAR Shoemaker: 1997 1,212: 49.5 Flyby; largest asteroid visited by a spacecraft at the time. 433 Eros: 34 × 11 × 11 (17 km) 1898 NEAR Shoemaker: 1998–2001 landed: landed

  7. List of exceptional asteroids - Wikipedia

    en.wikipedia.org/wiki/List_of_exceptional_asteroids

    The largest asteroids with an accurately measured mass, because they have been studied by the probe Dawn, are 1 Ceres with a mass of (939.3 ± 0.5) × 10 18 kg, and 4 Vesta at (259.076 ± 0.001) × 10 18 kg. The third-largest asteroid with an accurately measured mass, because it has moons, is 87 Sylvia at (14.76 ± 0.06) × 10 18 kg.

  8. The mega-comet hurtling through our solar system is 85, yes ...

    www.aol.com/mega-comet-hurtling-solar-system...

    There are some bona fide behemoths sailing around the solar system.In 2021, astronomers identified a gargantuan comet — an ancient mass of ices, dust, and rocks — hurtling through our cosmic ...

  9. List of Solar System objects by size - Wikipedia

    en.wikipedia.org/wiki/List_of_Solar_System...

    Many TNOs are often just assumed to have Pluto's density of 2.0 g/cm 3, but it is just as likely that they have a comet-like density of only 0.5 g/cm 3. [ 4 ] For example, if a TNO is incorrectly assumed to have a mass of 3.59 × 10 20 kg based on a radius of 350 km with a density of 2 g/cm 3 but is later discovered to have a radius of only 175 ...