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

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

    [10] [30] [j] The only known comet larger than C/2014 UN 271 is the active centaur 95P/Chiron, which has a diameter of approximately 215 km (134 mi). [ 10 ] While the mass and density C/2014 UN 271 have not yet been measured, [ 3 ] a rough estimate by NASA places its mass at 450 quadrillion kg (500 trillion short tons), about 100,000 times ...

  3. Observational history of comets - Wikipedia

    en.wikipedia.org/.../Observational_history_of_comets

    The tail of a comet points toward the direction of the Sun as it is moving through space based on the laws of refraction. The comet’s tail is composed of an air-like element that is transparent as it is seen in space but only when it is faced away from the Sun. The visibility of the tail is explained by solar rays reflecting off of the tail.

  4. List of comets by type - Wikipedia

    en.wikipedia.org/wiki/List_of_comets_by_type

    This is a list of comets (bodies that travel in elliptical, parabolic, and sometimes hyperbolic orbits and display a tail behind them) listed by type. Comets are sorted into four categories: periodic comets (e.g. Halley's Comet), non-periodic comets (e.g. Comet Hale–Bopp), comets with no meaningful orbit (the Great Comet of 1106), and lost comets (), displayed as either P (periodic), C (non ...

  5. List of missions to comets - Wikipedia

    en.wikipedia.org/wiki/List_of_missions_to_comets

    Comet Mission Outcome Remarks Carrier rocket [2] ICE (ISEE-3) 12 August 1978: NASA United States / ESA: 21P/Giacobini–Zinner: Flyby Successful Extended mission; Closest approach of 7,862 kilometres (4,885 mi) at 11:02 UTC on 11 September 1985. Also made distant observations of 1P/Halley in May 1986. [3] Delta 2914: Vega 1 (5VK No.901) 15 ...

  6. 10P/Tempel - Wikipedia

    en.wikipedia.org/wiki/10P/Tempel

    10P/Tempel, also known as Tempel 2, is a periodic Jupiter-family comet with a 5-year orbital period. It was discovered on July 4, 1873 by Wilhelm Tempel. [7] At the perihelion passage on 2 August 2026 the solar elongation is calculated at 164 degrees, with apparent magnitude approximately 8, [4] with closest approach to Earth on 3 August 2026 at a distance of 0.414 AU (61.9 million km).

  7. C/2010 X1 (Elenin) - Wikipedia

    en.wikipedia.org/wiki/C/2010_X1_(Elenin)

    Comet C/2010 X1 (Elenin) is an Oort cloud comet discovered by Russian amateur astronomer Leonid Elenin on December 10, 2010, through remote control of the International Scientific Optical Network's robotic observatory near Mayhill in the U.S. state of New Mexico.